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| <h1>Source code for airflow.models.baseoperator</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># "License"); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| <span class="sd">"""Base operator for all operators."""</span> |
| <span class="kn">import</span> <span class="nn">abc</span> |
| <span class="kn">import</span> <span class="nn">copy</span> |
| <span class="kn">import</span> <span class="nn">functools</span> |
| <span class="kn">import</span> <span class="nn">logging</span> |
| <span class="kn">import</span> <span class="nn">sys</span> |
| <span class="kn">import</span> <span class="nn">warnings</span> |
| <span class="kn">from</span> <span class="nn">abc</span> <span class="kn">import</span> <span class="n">ABCMeta</span><span class="p">,</span> <span class="n">abstractmethod</span> |
| <span class="kn">from</span> <span class="nn">datetime</span> <span class="kn">import</span> <span class="n">datetime</span><span class="p">,</span> <span class="n">timedelta</span> |
| <span class="kn">from</span> <span class="nn">inspect</span> <span class="kn">import</span> <span class="n">signature</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="p">(</span> |
| <span class="n">TYPE_CHECKING</span><span class="p">,</span> |
| <span class="n">Any</span><span class="p">,</span> |
| <span class="n">Callable</span><span class="p">,</span> |
| <span class="n">ClassVar</span><span class="p">,</span> |
| <span class="n">Dict</span><span class="p">,</span> |
| <span class="n">FrozenSet</span><span class="p">,</span> |
| <span class="n">Iterable</span><span class="p">,</span> |
| <span class="n">List</span><span class="p">,</span> |
| <span class="n">Optional</span><span class="p">,</span> |
| <span class="n">Sequence</span><span class="p">,</span> |
| <span class="n">Set</span><span class="p">,</span> |
| <span class="n">Tuple</span><span class="p">,</span> |
| <span class="n">Type</span><span class="p">,</span> |
| <span class="n">TypeVar</span><span class="p">,</span> |
| <span class="n">Union</span><span class="p">,</span> |
| <span class="n">cast</span><span class="p">,</span> |
| <span class="p">)</span> |
| |
| <span class="kn">import</span> <span class="nn">attr</span> |
| <span class="kn">import</span> <span class="nn">jinja2</span> |
| <span class="kn">from</span> <span class="nn">dateutil.relativedelta</span> <span class="kn">import</span> <span class="n">relativedelta</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.orm</span> <span class="kn">import</span> <span class="n">Session</span> |
| |
| <span class="kn">import</span> <span class="nn">airflow.templates</span> |
| <span class="kn">from</span> <span class="nn">airflow.compat.functools</span> <span class="kn">import</span> <span class="n">cached_property</span> |
| <span class="kn">from</span> <span class="nn">airflow.configuration</span> <span class="kn">import</span> <span class="n">conf</span> |
| <span class="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="kn">import</span> <span class="n">AirflowException</span> |
| <span class="kn">from</span> <span class="nn">airflow.lineage</span> <span class="kn">import</span> <span class="n">apply_lineage</span><span class="p">,</span> <span class="n">prepare_lineage</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.base</span> <span class="kn">import</span> <span class="n">Operator</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.pool</span> <span class="kn">import</span> <span class="n">Pool</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.taskinstance</span> <span class="kn">import</span> <span class="n">Context</span><span class="p">,</span> <span class="n">TaskInstance</span><span class="p">,</span> <span class="n">clear_task_instances</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.taskmixin</span> <span class="kn">import</span> <span class="n">TaskMixin</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.xcom</span> <span class="kn">import</span> <span class="n">XCOM_RETURN_KEY</span> |
| <span class="kn">from</span> <span class="nn">airflow.ti_deps.deps.base_ti_dep</span> <span class="kn">import</span> <span class="n">BaseTIDep</span> |
| <span class="kn">from</span> <span class="nn">airflow.ti_deps.deps.not_in_retry_period_dep</span> <span class="kn">import</span> <span class="n">NotInRetryPeriodDep</span> |
| <span class="kn">from</span> <span class="nn">airflow.ti_deps.deps.not_previously_skipped_dep</span> <span class="kn">import</span> <span class="n">NotPreviouslySkippedDep</span> |
| <span class="kn">from</span> <span class="nn">airflow.ti_deps.deps.prev_dagrun_dep</span> <span class="kn">import</span> <span class="n">PrevDagrunDep</span> |
| <span class="kn">from</span> <span class="nn">airflow.ti_deps.deps.trigger_rule_dep</span> <span class="kn">import</span> <span class="n">TriggerRuleDep</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils</span> <span class="kn">import</span> <span class="n">timezone</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.edgemodifier</span> <span class="kn">import</span> <span class="n">EdgeModifier</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.helpers</span> <span class="kn">import</span> <span class="n">validate_key</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.log.logging_mixin</span> <span class="kn">import</span> <span class="n">LoggingMixin</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.operator_resources</span> <span class="kn">import</span> <span class="n">Resources</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.session</span> <span class="kn">import</span> <span class="n">provide_session</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.trigger_rule</span> <span class="kn">import</span> <span class="n">TriggerRule</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.weight_rule</span> <span class="kn">import</span> <span class="n">WeightRule</span> |
| |
| <span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.task_group</span> <span class="kn">import</span> <span class="n">TaskGroup</span> |
| |
| <div class="viewcode-block" id="ScheduleInterval"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.ScheduleInterval">[docs]</a><span class="n">ScheduleInterval</span> <span class="o">=</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">timedelta</span><span class="p">,</span> <span class="n">relativedelta</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="TaskStateChangeCallback"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.TaskStateChangeCallback">[docs]</a><span class="n">TaskStateChangeCallback</span> <span class="o">=</span> <span class="n">Callable</span><span class="p">[[</span><span class="n">Context</span><span class="p">],</span> <span class="kc">None</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="T"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.T">[docs]</a><span class="n">T</span> <span class="o">=</span> <span class="n">TypeVar</span><span class="p">(</span><span class="s1">'T'</span><span class="p">,</span> <span class="n">bound</span><span class="o">=</span><span class="n">Callable</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="BaseOperatorMeta"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperatorMeta">[docs]</a><span class="k">class</span> <span class="nc">BaseOperatorMeta</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABCMeta</span><span class="p">):</span> |
| <span class="sd">"""Metaclass of BaseOperator."""</span> |
| |
| <span class="nd">@classmethod</span> |
| <div class="viewcode-block" id="BaseOperatorMeta._apply_defaults"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperatorMeta._apply_defaults">[docs]</a> <span class="k">def</span> <span class="nf">_apply_defaults</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">func</span><span class="p">:</span> <span class="n">T</span><span class="p">)</span> <span class="o">-></span> <span class="n">T</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Function decorator that Looks for an argument named "default_args", and</span> |
| <span class="sd"> fills the unspecified arguments from it.</span> |
| |
| <span class="sd"> Since python2.* isn't clear about which arguments are missing when</span> |
| <span class="sd"> calling a function, and that this can be quite confusing with multi-level</span> |
| <span class="sd"> inheritance and argument defaults, this decorator also alerts with</span> |
| <span class="sd"> specific information about the missing arguments.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># Cache inspect.signature for the wrapper closure to avoid calling it</span> |
| <span class="c1"># at every decorated invocation. This is separate sig_cache created</span> |
| <span class="c1"># per decoration, i.e. each function decorated using apply_defaults will</span> |
| <span class="c1"># have a different sig_cache.</span> |
| <span class="n">sig_cache</span> <span class="o">=</span> <span class="n">signature</span><span class="p">(</span><span class="n">func</span><span class="p">)</span> |
| <span class="n">non_optional_args</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="n">name</span> |
| <span class="k">for</span> <span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">param</span><span class="p">)</span> <span class="ow">in</span> <span class="n">sig_cache</span><span class="o">.</span><span class="n">parameters</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">param</span><span class="o">.</span><span class="n">default</span> <span class="o">==</span> <span class="n">param</span><span class="o">.</span><span class="n">empty</span> |
| <span class="ow">and</span> <span class="n">param</span><span class="o">.</span><span class="n">name</span> <span class="o">!=</span> <span class="s1">'self'</span> |
| <span class="ow">and</span> <span class="n">param</span><span class="o">.</span><span class="n">kind</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="n">param</span><span class="o">.</span><span class="n">VAR_POSITIONAL</span><span class="p">,</span> <span class="n">param</span><span class="o">.</span><span class="n">VAR_KEYWORD</span><span class="p">)</span> |
| <span class="p">}</span> |
| |
| <span class="k">class</span> <span class="nc">autostacklevel_warn</span><span class="p">:</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">warnings</span> <span class="o">=</span> <span class="nb">__import__</span><span class="p">(</span><span class="s1">'warnings'</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="fm">__getattr__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">warnings</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="fm">__dir__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">dir</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">warnings</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">warn</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">message</span><span class="p">,</span> <span class="n">category</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">source</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="n">message</span><span class="p">,</span> <span class="n">category</span><span class="p">,</span> <span class="n">stacklevel</span> <span class="o">+</span> <span class="mi">2</span><span class="p">,</span> <span class="n">source</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">func</span><span class="o">.</span><span class="vm">__globals__</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'warnings'</span><span class="p">)</span> <span class="ow">is</span> <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="s1">'warnings'</span><span class="p">]:</span> |
| <span class="c1"># Yes, this is slightly hacky, but it _automatically_ sets the right</span> |
| <span class="c1"># stacklevel parameter to `warnings.warn` to ignore the decorator. Now</span> |
| <span class="c1"># that the decorator is applied automatically, this makes the needed</span> |
| <span class="c1"># stacklevel parameter less confusing.</span> |
| <span class="n">func</span><span class="o">.</span><span class="vm">__globals__</span><span class="p">[</span><span class="s1">'warnings'</span><span class="p">]</span> <span class="o">=</span> <span class="n">autostacklevel_warn</span><span class="p">()</span> |
| |
| <span class="nd">@functools</span><span class="o">.</span><span class="n">wraps</span><span class="p">(</span><span class="n">func</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">apply_defaults</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">:</span> <span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DagContext</span> |
| |
| <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">args</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">"Use keyword arguments when initializing operators"</span><span class="p">)</span> |
| <span class="n">dag_args</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="n">dag_params</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| |
| <span class="n">dag</span> <span class="o">=</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'dag'</span><span class="p">)</span> <span class="ow">or</span> <span class="n">DagContext</span><span class="o">.</span><span class="n">get_current_dag</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">dag</span><span class="p">:</span> |
| <span class="n">dag_args</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">default_args</span><span class="p">)</span> <span class="ow">or</span> <span class="p">{}</span> |
| <span class="n">dag_params</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">params</span><span class="p">)</span> <span class="ow">or</span> <span class="p">{}</span> |
| |
| <span class="n">params</span> <span class="o">=</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'params'</span><span class="p">,</span> <span class="p">{})</span> <span class="ow">or</span> <span class="p">{}</span> |
| <span class="n">dag_params</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">params</span><span class="p">)</span> |
| |
| <span class="n">default_args</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="k">if</span> <span class="s1">'default_args'</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="p">:</span> |
| <span class="n">default_args</span> <span class="o">=</span> <span class="n">kwargs</span><span class="p">[</span><span class="s1">'default_args'</span><span class="p">]</span> |
| <span class="k">if</span> <span class="s1">'params'</span> <span class="ow">in</span> <span class="n">default_args</span><span class="p">:</span> |
| <span class="n">dag_params</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">default_args</span><span class="p">[</span><span class="s1">'params'</span><span class="p">])</span> |
| <span class="k">del</span> <span class="n">default_args</span><span class="p">[</span><span class="s1">'params'</span><span class="p">]</span> |
| |
| <span class="n">dag_args</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">default_args</span><span class="p">)</span> |
| <span class="n">default_args</span> <span class="o">=</span> <span class="n">dag_args</span> |
| |
| <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">sig_cache</span><span class="o">.</span><span class="n">parameters</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">arg</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">kwargs</span> <span class="ow">and</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">default_args</span><span class="p">:</span> |
| <span class="n">kwargs</span><span class="p">[</span><span class="n">arg</span><span class="p">]</span> <span class="o">=</span> <span class="n">default_args</span><span class="p">[</span><span class="n">arg</span><span class="p">]</span> |
| |
| <span class="n">missing_args</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">non_optional_args</span> <span class="o">-</span> <span class="nb">set</span><span class="p">(</span><span class="n">kwargs</span><span class="p">))</span> |
| <span class="k">if</span> <span class="n">missing_args</span><span class="p">:</span> |
| <span class="n">msg</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"Argument </span><span class="si">{</span><span class="n">missing_args</span><span class="si">}</span><span class="s2"> is required"</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">dag_params</span><span class="p">:</span> |
| <span class="n">kwargs</span><span class="p">[</span><span class="s1">'params'</span><span class="p">]</span> <span class="o">=</span> <span class="n">dag_params</span> |
| |
| <span class="k">if</span> <span class="n">default_args</span><span class="p">:</span> |
| <span class="n">kwargs</span><span class="p">[</span><span class="s1">'default_args'</span><span class="p">]</span> <span class="o">=</span> <span class="n">default_args</span> |
| |
| <span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'_hook_apply_defaults'</span><span class="p">):</span> |
| <span class="n">args</span><span class="p">,</span> <span class="n">kwargs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_hook_apply_defaults</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="n">result</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="c1"># Here we set upstream task defined by XComArgs passed to template fields of the operator</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_xcomargs_dependencies</span><span class="p">()</span> |
| |
| <span class="c1"># Mark instance as instantiated https://docs.python.org/3/tutorial/classes.html#private-variables</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_BaseOperator__instantiated</span> <span class="o">=</span> <span class="kc">True</span> |
| <span class="k">return</span> <span class="n">result</span> |
| |
| <span class="k">return</span> <span class="n">cast</span><span class="p">(</span><span class="n">T</span><span class="p">,</span> <span class="n">apply_defaults</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperatorMeta.__new__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperatorMeta.__new__">[docs]</a> <span class="k">def</span> <span class="fm">__new__</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">bases</span><span class="p">,</span> <span class="n">namespace</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="n">new_cls</span> <span class="o">=</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__new__</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">bases</span><span class="p">,</span> <span class="n">namespace</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="n">new_cls</span><span class="o">.</span><span class="fm">__init__</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="n">_apply_defaults</span><span class="p">(</span><span class="n">new_cls</span><span class="o">.</span><span class="fm">__init__</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">new_cls</span></div></div> |
| |
| |
| <div class="viewcode-block" id="BaseOperator"><a class="viewcode-back" href="../../../_api/airflow/models/index.html#airflow.models.baseoperator.BaseOperator">[docs]</a><span class="nd">@functools</span><span class="o">.</span><span class="n">total_ordering</span> |
| <span class="k">class</span> <span class="nc">BaseOperator</span><span class="p">(</span><span class="n">Operator</span><span class="p">,</span> <span class="n">LoggingMixin</span><span class="p">,</span> <span class="n">TaskMixin</span><span class="p">,</span> <span class="n">metaclass</span><span class="o">=</span><span class="n">BaseOperatorMeta</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Abstract base class for all operators. Since operators create objects that</span> |
| <span class="sd"> become nodes in the dag, BaseOperator contains many recursive methods for</span> |
| <span class="sd"> dag crawling behavior. To derive this class, you are expected to override</span> |
| <span class="sd"> the constructor as well as the 'execute' method.</span> |
| |
| <span class="sd"> Operators derived from this class should perform or trigger certain tasks</span> |
| <span class="sd"> synchronously (wait for completion). Example of operators could be an</span> |
| <span class="sd"> operator that runs a Pig job (PigOperator), a sensor operator that</span> |
| <span class="sd"> waits for a partition to land in Hive (HiveSensorOperator), or one that</span> |
| <span class="sd"> moves data from Hive to MySQL (Hive2MySqlOperator). Instances of these</span> |
| <span class="sd"> operators (tasks) target specific operations, running specific scripts,</span> |
| <span class="sd"> functions or data transfers.</span> |
| |
| <span class="sd"> This class is abstract and shouldn't be instantiated. Instantiating a</span> |
| <span class="sd"> class derived from this one results in the creation of a task object,</span> |
| <span class="sd"> which ultimately becomes a node in DAG objects. Task dependencies should</span> |
| <span class="sd"> be set by using the set_upstream and/or set_downstream methods.</span> |
| |
| <span class="sd"> :param task_id: a unique, meaningful id for the task</span> |
| <span class="sd"> :type task_id: str</span> |
| <span class="sd"> :param owner: the owner of the task, using the unix username is recommended</span> |
| <span class="sd"> :type owner: str</span> |
| <span class="sd"> :param email: the 'to' email address(es) used in email alerts. This can be a</span> |
| <span class="sd"> single email or multiple ones. Multiple addresses can be specified as a</span> |
| <span class="sd"> comma or semi-colon separated string or by passing a list of strings.</span> |
| <span class="sd"> :type email: str or list[str]</span> |
| <span class="sd"> :param email_on_retry: Indicates whether email alerts should be sent when a</span> |
| <span class="sd"> task is retried</span> |
| <span class="sd"> :type email_on_retry: bool</span> |
| <span class="sd"> :param email_on_failure: Indicates whether email alerts should be sent when</span> |
| <span class="sd"> a task failed</span> |
| <span class="sd"> :type email_on_failure: bool</span> |
| <span class="sd"> :param retries: the number of retries that should be performed before</span> |
| <span class="sd"> failing the task</span> |
| <span class="sd"> :type retries: int</span> |
| <span class="sd"> :param retry_delay: delay between retries</span> |
| <span class="sd"> :type retry_delay: datetime.timedelta</span> |
| <span class="sd"> :param retry_exponential_backoff: allow progressive longer waits between</span> |
| <span class="sd"> retries by using exponential backoff algorithm on retry delay (delay</span> |
| <span class="sd"> will be converted into seconds)</span> |
| <span class="sd"> :type retry_exponential_backoff: bool</span> |
| <span class="sd"> :param max_retry_delay: maximum delay interval between retries</span> |
| <span class="sd"> :type max_retry_delay: datetime.timedelta</span> |
| <span class="sd"> :param start_date: The ``start_date`` for the task, determines</span> |
| <span class="sd"> the ``execution_date`` for the first task instance. The best practice</span> |
| <span class="sd"> is to have the start_date rounded</span> |
| <span class="sd"> to your DAG's ``schedule_interval``. Daily jobs have their start_date</span> |
| <span class="sd"> some day at 00:00:00, hourly jobs have their start_date at 00:00</span> |
| <span class="sd"> of a specific hour. Note that Airflow simply looks at the latest</span> |
| <span class="sd"> ``execution_date`` and adds the ``schedule_interval`` to determine</span> |
| <span class="sd"> the next ``execution_date``. It is also very important</span> |
| <span class="sd"> to note that different tasks' dependencies</span> |
| <span class="sd"> need to line up in time. If task A depends on task B and their</span> |
| <span class="sd"> start_date are offset in a way that their execution_date don't line</span> |
| <span class="sd"> up, A's dependencies will never be met. If you are looking to delay</span> |
| <span class="sd"> a task, for example running a daily task at 2AM, look into the</span> |
| <span class="sd"> ``TimeSensor`` and ``TimeDeltaSensor``. We advise against using</span> |
| <span class="sd"> dynamic ``start_date`` and recommend using fixed ones. Read the</span> |
| <span class="sd"> FAQ entry about start_date for more information.</span> |
| <span class="sd"> :type start_date: datetime.datetime</span> |
| <span class="sd"> :param end_date: if specified, the scheduler won't go beyond this date</span> |
| <span class="sd"> :type end_date: datetime.datetime</span> |
| <span class="sd"> :param depends_on_past: when set to true, task instances will run</span> |
| <span class="sd"> sequentially and only if the previous instance has succeeded or has been skipped.</span> |
| <span class="sd"> The task instance for the start_date is allowed to run.</span> |
| <span class="sd"> :type depends_on_past: bool</span> |
| <span class="sd"> :param wait_for_downstream: when set to true, an instance of task</span> |
| <span class="sd"> X will wait for tasks immediately downstream of the previous instance</span> |
| <span class="sd"> of task X to finish successfully or be skipped before it runs. This is useful if the</span> |
| <span class="sd"> different instances of a task X alter the same asset, and this asset</span> |
| <span class="sd"> is used by tasks downstream of task X. Note that depends_on_past</span> |
| <span class="sd"> is forced to True wherever wait_for_downstream is used. Also note that</span> |
| <span class="sd"> only tasks *immediately* downstream of the previous task instance are waited</span> |
| <span class="sd"> for; the statuses of any tasks further downstream are ignored.</span> |
| <span class="sd"> :type wait_for_downstream: bool</span> |
| <span class="sd"> :param dag: a reference to the dag the task is attached to (if any)</span> |
| <span class="sd"> :type dag: airflow.models.DAG</span> |
| <span class="sd"> :param priority_weight: priority weight of this task against other task.</span> |
| <span class="sd"> This allows the executor to trigger higher priority tasks before</span> |
| <span class="sd"> others when things get backed up. Set priority_weight as a higher</span> |
| <span class="sd"> number for more important tasks.</span> |
| <span class="sd"> :type priority_weight: int</span> |
| <span class="sd"> :param weight_rule: weighting method used for the effective total</span> |
| <span class="sd"> priority weight of the task. Options are:</span> |
| <span class="sd"> ``{ downstream | upstream | absolute }`` default is ``downstream``</span> |
| <span class="sd"> When set to ``downstream`` the effective weight of the task is the</span> |
| <span class="sd"> aggregate sum of all downstream descendants. As a result, upstream</span> |
| <span class="sd"> tasks will have higher weight and will be scheduled more aggressively</span> |
| <span class="sd"> when using positive weight values. This is useful when you have</span> |
| <span class="sd"> multiple dag run instances and desire to have all upstream tasks to</span> |
| <span class="sd"> complete for all runs before each dag can continue processing</span> |
| <span class="sd"> downstream tasks. When set to ``upstream`` the effective weight is the</span> |
| <span class="sd"> aggregate sum of all upstream ancestors. This is the opposite where</span> |
| <span class="sd"> downstream tasks have higher weight and will be scheduled more</span> |
| <span class="sd"> aggressively when using positive weight values. This is useful when you</span> |
| <span class="sd"> have multiple dag run instances and prefer to have each dag complete</span> |
| <span class="sd"> before starting upstream tasks of other dags. When set to</span> |
| <span class="sd"> ``absolute``, the effective weight is the exact ``priority_weight``</span> |
| <span class="sd"> specified without additional weighting. You may want to do this when</span> |
| <span class="sd"> you know exactly what priority weight each task should have.</span> |
| <span class="sd"> Additionally, when set to ``absolute``, there is bonus effect of</span> |
| <span class="sd"> significantly speeding up the task creation process as for very large</span> |
| <span class="sd"> DAGS. Options can be set as string or using the constants defined in</span> |
| <span class="sd"> the static class ``airflow.utils.WeightRule``</span> |
| <span class="sd"> :type weight_rule: str</span> |
| <span class="sd"> :param queue: which queue to target when running this job. Not</span> |
| <span class="sd"> all executors implement queue management, the CeleryExecutor</span> |
| <span class="sd"> does support targeting specific queues.</span> |
| <span class="sd"> :type queue: str</span> |
| <span class="sd"> :param pool: the slot pool this task should run in, slot pools are a</span> |
| <span class="sd"> way to limit concurrency for certain tasks</span> |
| <span class="sd"> :type pool: str</span> |
| <span class="sd"> :param pool_slots: the number of pool slots this task should use (>= 1)</span> |
| <span class="sd"> Values less than 1 are not allowed.</span> |
| <span class="sd"> :type pool_slots: int</span> |
| <span class="sd"> :param sla: time by which the job is expected to succeed. Note that</span> |
| <span class="sd"> this represents the ``timedelta`` after the period is closed. For</span> |
| <span class="sd"> example if you set an SLA of 1 hour, the scheduler would send an email</span> |
| <span class="sd"> soon after 1:00AM on the ``2016-01-02`` if the ``2016-01-01`` instance</span> |
| <span class="sd"> has not succeeded yet.</span> |
| <span class="sd"> The scheduler pays special attention for jobs with an SLA and</span> |
| <span class="sd"> sends alert</span> |
| <span class="sd"> emails for sla misses. SLA misses are also recorded in the database</span> |
| <span class="sd"> for future reference. All tasks that share the same SLA time</span> |
| <span class="sd"> get bundled in a single email, sent soon after that time. SLA</span> |
| <span class="sd"> notification are sent once and only once for each task instance.</span> |
| <span class="sd"> :type sla: datetime.timedelta</span> |
| <span class="sd"> :param execution_timeout: max time allowed for the execution of</span> |
| <span class="sd"> this task instance, if it goes beyond it will raise and fail.</span> |
| <span class="sd"> :type execution_timeout: datetime.timedelta</span> |
| <span class="sd"> :param on_failure_callback: a function to be called when a task instance</span> |
| <span class="sd"> of this task fails. a context dictionary is passed as a single</span> |
| <span class="sd"> parameter to this function. Context contains references to related</span> |
| <span class="sd"> objects to the task instance and is documented under the macros</span> |
| <span class="sd"> section of the API.</span> |
| <span class="sd"> :type on_failure_callback: TaskStateChangeCallback</span> |
| <span class="sd"> :param on_execute_callback: much like the ``on_failure_callback`` except</span> |
| <span class="sd"> that it is executed right before the task is executed.</span> |
| <span class="sd"> :type on_execute_callback: TaskStateChangeCallback</span> |
| <span class="sd"> :param on_retry_callback: much like the ``on_failure_callback`` except</span> |
| <span class="sd"> that it is executed when retries occur.</span> |
| <span class="sd"> :type on_retry_callback: TaskStateChangeCallback</span> |
| <span class="sd"> :param on_success_callback: much like the ``on_failure_callback`` except</span> |
| <span class="sd"> that it is executed when the task succeeds.</span> |
| <span class="sd"> :type on_success_callback: TaskStateChangeCallback</span> |
| <span class="sd"> :param trigger_rule: defines the rule by which dependencies are applied</span> |
| <span class="sd"> for the task to get triggered. Options are:</span> |
| <span class="sd"> ``{ all_success | all_failed | all_done | one_success |</span> |
| <span class="sd"> one_failed | none_failed | none_failed_or_skipped | none_skipped | dummy}``</span> |
| <span class="sd"> default is ``all_success``. Options can be set as string or</span> |
| <span class="sd"> using the constants defined in the static class</span> |
| <span class="sd"> ``airflow.utils.TriggerRule``</span> |
| <span class="sd"> :type trigger_rule: str</span> |
| <span class="sd"> :param resources: A map of resource parameter names (the argument names of the</span> |
| <span class="sd"> Resources constructor) to their values.</span> |
| <span class="sd"> :type resources: dict</span> |
| <span class="sd"> :param run_as_user: unix username to impersonate while running the task</span> |
| <span class="sd"> :type run_as_user: str</span> |
| <span class="sd"> :param task_concurrency: When set, a task will be able to limit the concurrent</span> |
| <span class="sd"> runs across execution_dates</span> |
| <span class="sd"> :type task_concurrency: int</span> |
| <span class="sd"> :param executor_config: Additional task-level configuration parameters that are</span> |
| <span class="sd"> interpreted by a specific executor. Parameters are namespaced by the name of</span> |
| <span class="sd"> executor.</span> |
| |
| <span class="sd"> **Example**: to run this task in a specific docker container through</span> |
| <span class="sd"> the KubernetesExecutor ::</span> |
| |
| <span class="sd"> MyOperator(...,</span> |
| <span class="sd"> executor_config={</span> |
| <span class="sd"> "KubernetesExecutor":</span> |
| <span class="sd"> {"image": "myCustomDockerImage"}</span> |
| <span class="sd"> }</span> |
| <span class="sd"> )</span> |
| |
| <span class="sd"> :type executor_config: dict</span> |
| <span class="sd"> :param do_xcom_push: if True, an XCom is pushed containing the Operator's</span> |
| <span class="sd"> result</span> |
| <span class="sd"> :type do_xcom_push: bool</span> |
| <span class="sd"> :param doc: Add documentation or notes to your Task objects that is visible in</span> |
| <span class="sd"> Task Instance details View in the Webserver</span> |
| <span class="sd"> :type doc: str</span> |
| <span class="sd"> :param doc_md: Add documentation (in Markdown format) or notes to your Task objects</span> |
| <span class="sd"> that is visible in Task Instance details View in the Webserver</span> |
| <span class="sd"> :type doc_md: str</span> |
| <span class="sd"> :param doc_rst: Add documentation (in RST format) or notes to your Task objects</span> |
| <span class="sd"> that is visible in Task Instance details View in the Webserver</span> |
| <span class="sd"> :type doc_rst: str</span> |
| <span class="sd"> :param doc_json: Add documentation (in JSON format) or notes to your Task objects</span> |
| <span class="sd"> that is visible in Task Instance details View in the Webserver</span> |
| <span class="sd"> :type doc_json: str</span> |
| <span class="sd"> :param doc_yaml: Add documentation (in YAML format) or notes to your Task objects</span> |
| <span class="sd"> that is visible in Task Instance details View in the Webserver</span> |
| <span class="sd"> :type doc_yaml: str</span> |
| <span class="sd"> """</span> |
| |
| <span class="c1"># For derived classes to define which fields will get jinjaified</span> |
| <div class="viewcode-block" id="BaseOperator.template_fields"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.template_fields">[docs]</a> <span class="n">template_fields</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">()</span></div> |
| <span class="c1"># Defines which files extensions to look for in the templated fields</span> |
| <div class="viewcode-block" id="BaseOperator.template_ext"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.template_ext">[docs]</a> <span class="n">template_ext</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">()</span></div> |
| <span class="c1"># Template field renderers indicating type of the field, for example sql, json, bash</span> |
| <div class="viewcode-block" id="BaseOperator.template_fields_renderers"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.template_fields_renderers">[docs]</a> <span class="n">template_fields_renderers</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span></div> |
| |
| <span class="c1"># Defines the color in the UI</span> |
| <div class="viewcode-block" id="BaseOperator.ui_color"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#fff'</span> <span class="c1"># type: str</span></div> |
| <div class="viewcode-block" id="BaseOperator.ui_fgcolor"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.ui_fgcolor">[docs]</a> <span class="n">ui_fgcolor</span> <span class="o">=</span> <span class="s1">'#000'</span> <span class="c1"># type: str</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.pool"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.pool">[docs]</a> <span class="n">pool</span> <span class="o">=</span> <span class="s2">""</span> <span class="c1"># type: str</span></div> |
| |
| <span class="c1"># base list which includes all the attrs that don't need deep copy.</span> |
| <div class="viewcode-block" id="BaseOperator._base_operator_shallow_copy_attrs"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator._base_operator_shallow_copy_attrs">[docs]</a> <span class="n">_base_operator_shallow_copy_attrs</span><span class="p">:</span> <span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span> |
| <span class="s1">'user_defined_macros'</span><span class="p">,</span> |
| <span class="s1">'user_defined_filters'</span><span class="p">,</span> |
| <span class="s1">'params'</span><span class="p">,</span> |
| <span class="s1">'_log'</span><span class="p">,</span></div> |
| <span class="p">)</span> |
| |
| <span class="c1"># each operator should override this class attr for shallow copy attrs.</span> |
| <div class="viewcode-block" id="BaseOperator.shallow_copy_attrs"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.shallow_copy_attrs">[docs]</a> <span class="n">shallow_copy_attrs</span><span class="p">:</span> <span class="n">Tuple</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="o">...</span><span class="p">]</span> <span class="o">=</span> <span class="p">()</span></div> |
| |
| <span class="c1"># Defines the operator level extra links</span> |
| <div class="viewcode-block" id="BaseOperator.operator_extra_links"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.operator_extra_links">[docs]</a> <span class="n">operator_extra_links</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="s1">'BaseOperatorLink'</span><span class="p">]</span> <span class="o">=</span> <span class="p">()</span></div> |
| |
| <span class="c1"># The _serialized_fields are lazily loaded when get_serialized_fields() method is called</span> |
| <div class="viewcode-block" id="BaseOperator.__serialized_fields"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__serialized_fields">[docs]</a> <span class="n">__serialized_fields</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">FrozenSet</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator._comps"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator._comps">[docs]</a> <span class="n">_comps</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="s1">'task_id'</span><span class="p">,</span> |
| <span class="s1">'dag_id'</span><span class="p">,</span> |
| <span class="s1">'owner'</span><span class="p">,</span> |
| <span class="s1">'email'</span><span class="p">,</span> |
| <span class="s1">'email_on_retry'</span><span class="p">,</span> |
| <span class="s1">'retry_delay'</span><span class="p">,</span> |
| <span class="s1">'retry_exponential_backoff'</span><span class="p">,</span> |
| <span class="s1">'max_retry_delay'</span><span class="p">,</span> |
| <span class="s1">'start_date'</span><span class="p">,</span> |
| <span class="s1">'depends_on_past'</span><span class="p">,</span> |
| <span class="s1">'wait_for_downstream'</span><span class="p">,</span> |
| <span class="s1">'priority_weight'</span><span class="p">,</span> |
| <span class="s1">'sla'</span><span class="p">,</span> |
| <span class="s1">'execution_timeout'</span><span class="p">,</span> |
| <span class="s1">'on_execute_callback'</span><span class="p">,</span> |
| <span class="s1">'on_failure_callback'</span><span class="p">,</span> |
| <span class="s1">'on_success_callback'</span><span class="p">,</span> |
| <span class="s1">'on_retry_callback'</span><span class="p">,</span> |
| <span class="s1">'do_xcom_push'</span><span class="p">,</span></div> |
| <span class="p">}</span> |
| |
| <span class="c1"># Defines if the operator supports lineage without manual definitions</span> |
| <div class="viewcode-block" id="BaseOperator.supports_lineage"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.supports_lineage">[docs]</a> <span class="n">supports_lineage</span> <span class="o">=</span> <span class="kc">False</span></div> |
| |
| <span class="c1"># If True then the class constructor was called</span> |
| <div class="viewcode-block" id="BaseOperator.__instantiated"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__instantiated">[docs]</a> <span class="n">__instantiated</span> <span class="o">=</span> <span class="kc">False</span></div> |
| |
| <span class="c1"># Set to True before calling execute method</span> |
| <div class="viewcode-block" id="BaseOperator._lock_for_execution"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator._lock_for_execution">[docs]</a> <span class="n">_lock_for_execution</span> <span class="o">=</span> <span class="kc">False</span></div> |
| |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">owner</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'operators'</span><span class="p">,</span> <span class="s1">'DEFAULT_OWNER'</span><span class="p">),</span> |
| <span class="n">email</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Iterable</span><span class="p">[</span><span class="nb">str</span><span class="p">]]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">email_on_retry</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="s1">'default_email_on_retry'</span><span class="p">,</span> <span class="n">fallback</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> |
| <span class="n">email_on_failure</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'email'</span><span class="p">,</span> <span class="s1">'default_email_on_failure'</span><span class="p">,</span> <span class="n">fallback</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> |
| <span class="n">retries</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getint</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'default_task_retries'</span><span class="p">,</span> <span class="n">fallback</span><span class="o">=</span><span class="mi">0</span><span class="p">),</span> |
| <span class="n">retry_delay</span><span class="p">:</span> <span class="n">timedelta</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">seconds</span><span class="o">=</span><span class="mi">300</span><span class="p">),</span> |
| <span class="n">retry_exponential_backoff</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">max_retry_delay</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">timedelta</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">start_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">end_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">depends_on_past</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">wait_for_downstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">dag</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">params</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">default_args</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">priority_weight</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> |
| <span class="n">weight_rule</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">WeightRule</span><span class="o">.</span><span class="n">DOWNSTREAM</span><span class="p">,</span> |
| <span class="n">queue</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'operators'</span><span class="p">,</span> <span class="s1">'default_queue'</span><span class="p">),</span> |
| <span class="n">pool</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">pool_slots</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> |
| <span class="n">sla</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">timedelta</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">execution_timeout</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">timedelta</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">on_execute_callback</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">TaskStateChangeCallback</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">on_failure_callback</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">TaskStateChangeCallback</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">on_success_callback</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">TaskStateChangeCallback</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">on_retry_callback</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">TaskStateChangeCallback</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">trigger_rule</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">TriggerRule</span><span class="o">.</span><span class="n">ALL_SUCCESS</span><span class="p">,</span> |
| <span class="n">resources</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">run_as_user</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_concurrency</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">int</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">executor_config</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">do_xcom_push</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> |
| <span class="n">inlets</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">outlets</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_group</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="s2">"TaskGroup"</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">doc</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">doc_md</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">doc_json</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">doc_yaml</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">doc_rst</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DagContext</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.task_group</span> <span class="kn">import</span> <span class="n">TaskGroupContext</span> |
| |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">kwargs</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'operators'</span><span class="p">,</span> <span class="s1">'ALLOW_ILLEGAL_ARGUMENTS'</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="s2">"Invalid arguments were passed to </span><span class="si">{c}</span><span class="s2"> (task_id: </span><span class="si">{t}</span><span class="s2">). Invalid "</span> |
| <span class="s2">"arguments were:</span><span class="se">\n</span><span class="s2">**kwargs: </span><span class="si">{k}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">c</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">k</span><span class="o">=</span><span class="n">kwargs</span><span class="p">,</span> <span class="n">t</span><span class="o">=</span><span class="n">task_id</span><span class="p">),</span> |
| <span class="p">)</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> |
| <span class="s1">'Invalid arguments were passed to </span><span class="si">{c}</span><span class="s1"> (task_id: </span><span class="si">{t}</span><span class="s1">). '</span> |
| <span class="s1">'Support for passing such arguments will be dropped in '</span> |
| <span class="s1">'future. Invalid arguments were:'</span> |
| <span class="s1">'</span><span class="se">\n</span><span class="s1">**kwargs: </span><span class="si">{k}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">c</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">k</span><span class="o">=</span><span class="n">kwargs</span><span class="p">,</span> <span class="n">t</span><span class="o">=</span><span class="n">task_id</span><span class="p">),</span> |
| <span class="n">category</span><span class="o">=</span><span class="ne">PendingDeprecationWarning</span><span class="p">,</span> |
| <span class="n">stacklevel</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">validate_key</span><span class="p">(</span><span class="n">task_id</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span> <span class="o">=</span> <span class="n">task_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">label</span> <span class="o">=</span> <span class="n">task_id</span> |
| <span class="n">task_group</span> <span class="o">=</span> <span class="n">task_group</span> <span class="ow">or</span> <span class="n">TaskGroupContext</span><span class="o">.</span><span class="n">get_current_task_group</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">task_group</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span> <span class="o">=</span> <span class="n">task_group</span><span class="o">.</span><span class="n">child_id</span><span class="p">(</span><span class="n">task_id</span><span class="p">)</span> |
| <span class="n">task_group</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">owner</span> <span class="o">=</span> <span class="n">owner</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">email</span> <span class="o">=</span> <span class="n">email</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">email_on_retry</span> <span class="o">=</span> <span class="n">email_on_retry</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">email_on_failure</span> <span class="o">=</span> <span class="n">email_on_failure</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">start_date</span> <span class="o">=</span> <span class="n">start_date</span> |
| <span class="k">if</span> <span class="n">start_date</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">start_date</span><span class="p">,</span> <span class="n">datetime</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"start_date for </span><span class="si">%s</span><span class="s2"> isn't datetime.datetime"</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="n">start_date</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">start_date</span> <span class="o">=</span> <span class="n">timezone</span><span class="o">.</span><span class="n">convert_to_utc</span><span class="p">(</span><span class="n">start_date</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">end_date</span> <span class="o">=</span> <span class="n">end_date</span> |
| <span class="k">if</span> <span class="n">end_date</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">end_date</span> <span class="o">=</span> <span class="n">timezone</span><span class="o">.</span><span class="n">convert_to_utc</span><span class="p">(</span><span class="n">end_date</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">TriggerRule</span><span class="o">.</span><span class="n">is_valid</span><span class="p">(</span><span class="n">trigger_rule</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="s2">"The trigger_rule must be one of </span><span class="si">{all_triggers}</span><span class="s2">,"</span> |
| <span class="s2">"'</span><span class="si">{d}</span><span class="s2">.</span><span class="si">{t}</span><span class="s2">'; received '</span><span class="si">{tr}</span><span class="s2">'."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">all_triggers</span><span class="o">=</span><span class="n">TriggerRule</span><span class="o">.</span><span class="n">all_triggers</span><span class="p">(),</span> |
| <span class="n">d</span><span class="o">=</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span> <span class="k">if</span> <span class="n">dag</span> <span class="k">else</span> <span class="s2">""</span><span class="p">,</span> |
| <span class="n">t</span><span class="o">=</span><span class="n">task_id</span><span class="p">,</span> |
| <span class="n">tr</span><span class="o">=</span><span class="n">trigger_rule</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">trigger_rule</span> <span class="o">=</span> <span class="n">trigger_rule</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">depends_on_past</span> <span class="o">=</span> <span class="n">depends_on_past</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">wait_for_downstream</span> <span class="o">=</span> <span class="n">wait_for_downstream</span> |
| <span class="k">if</span> <span class="n">wait_for_downstream</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">depends_on_past</span> <span class="o">=</span> <span class="kc">True</span> |
| |
| <span class="k">if</span> <span class="n">retries</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">retries</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">parsed_retries</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">retries</span><span class="p">)</span> |
| <span class="k">except</span> <span class="p">(</span><span class="ne">TypeError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="sa">f</span><span class="s2">"'retries' type must be int, not </span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">retries</span><span class="p">)</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"Implicitly converting 'retries' for </span><span class="si">%s</span><span class="s2"> from </span><span class="si">%r</span><span class="s2"> to int"</span><span class="p">,</span> <span class="bp">self</span><span class="p">,</span> <span class="n">retries</span><span class="p">)</span> |
| <span class="n">retries</span> <span class="o">=</span> <span class="n">parsed_retries</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">retries</span> <span class="o">=</span> <span class="n">retries</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">queue</span> <span class="o">=</span> <span class="n">queue</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pool</span> <span class="o">=</span> <span class="n">Pool</span><span class="o">.</span><span class="n">DEFAULT_POOL_NAME</span> <span class="k">if</span> <span class="n">pool</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">pool</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pool_slots</span> <span class="o">=</span> <span class="n">pool_slots</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pool_slots</span> <span class="o"><</span> <span class="mi">1</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="sa">f</span><span class="s2">"pool slots for </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="si">}</span><span class="s2"> in dag </span><span class="si">{</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="si">}</span><span class="s2"> cannot be less than 1"</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">sla</span> <span class="o">=</span> <span class="n">sla</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">execution_timeout</span> <span class="o">=</span> <span class="n">execution_timeout</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">on_execute_callback</span> <span class="o">=</span> <span class="n">on_execute_callback</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">on_failure_callback</span> <span class="o">=</span> <span class="n">on_failure_callback</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">on_success_callback</span> <span class="o">=</span> <span class="n">on_success_callback</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">on_retry_callback</span> <span class="o">=</span> <span class="n">on_retry_callback</span> |
| |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">retry_delay</span><span class="p">,</span> <span class="n">timedelta</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">retry_delay</span> <span class="o">=</span> <span class="n">retry_delay</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"Retry_delay isn't timedelta object, assuming secs"</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">retry_delay</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">seconds</span><span class="o">=</span><span class="n">retry_delay</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">retry_exponential_backoff</span> <span class="o">=</span> <span class="n">retry_exponential_backoff</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">max_retry_delay</span> <span class="o">=</span> <span class="n">max_retry_delay</span> |
| <span class="k">if</span> <span class="n">max_retry_delay</span><span class="p">:</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">max_retry_delay</span><span class="p">,</span> <span class="n">timedelta</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">max_retry_delay</span> <span class="o">=</span> <span class="n">max_retry_delay</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"max_retry_delay isn't a timedelta object, assuming secs"</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">max_retry_delay</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">seconds</span><span class="o">=</span><span class="n">max_retry_delay</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">params</span> <span class="o">=</span> <span class="n">params</span> <span class="ow">or</span> <span class="p">{}</span> <span class="c1"># Available in templates!</span> |
| <span class="k">if</span> <span class="n">priority_weight</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">priority_weight</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s2">"`priority_weight` for task '</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="si">}</span><span class="s2">' only accepts integers, "</span> |
| <span class="sa">f</span><span class="s2">"received '</span><span class="si">{</span><span class="nb">type</span><span class="p">(</span><span class="n">priority_weight</span><span class="p">)</span><span class="si">}</span><span class="s2">'."</span> |
| <span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">priority_weight</span> <span class="o">=</span> <span class="n">priority_weight</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">WeightRule</span><span class="o">.</span><span class="n">is_valid</span><span class="p">(</span><span class="n">weight_rule</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="s2">"The weight_rule must be one of </span><span class="si">{all_weight_rules}</span><span class="s2">,"</span> |
| <span class="s2">"'</span><span class="si">{d}</span><span class="s2">.</span><span class="si">{t}</span><span class="s2">'; received '</span><span class="si">{tr}</span><span class="s2">'."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">all_weight_rules</span><span class="o">=</span><span class="n">WeightRule</span><span class="o">.</span><span class="n">all_weight_rules</span><span class="p">,</span> |
| <span class="n">d</span><span class="o">=</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span> <span class="k">if</span> <span class="n">dag</span> <span class="k">else</span> <span class="s2">""</span><span class="p">,</span> |
| <span class="n">t</span><span class="o">=</span><span class="n">task_id</span><span class="p">,</span> |
| <span class="n">tr</span><span class="o">=</span><span class="n">weight_rule</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">weight_rule</span> <span class="o">=</span> <span class="n">weight_rule</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">resources</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Resources</span><span class="p">]</span> <span class="o">=</span> <span class="n">Resources</span><span class="p">(</span><span class="o">**</span><span class="n">resources</span><span class="p">)</span> <span class="k">if</span> <span class="n">resources</span> <span class="k">else</span> <span class="kc">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">run_as_user</span> <span class="o">=</span> <span class="n">run_as_user</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">task_concurrency</span> <span class="o">=</span> <span class="n">task_concurrency</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">executor_config</span> <span class="o">=</span> <span class="n">executor_config</span> <span class="ow">or</span> <span class="p">{}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">do_xcom_push</span> <span class="o">=</span> <span class="n">do_xcom_push</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">doc_md</span> <span class="o">=</span> <span class="n">doc_md</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">doc_json</span> <span class="o">=</span> <span class="n">doc_json</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">doc_yaml</span> <span class="o">=</span> <span class="n">doc_yaml</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">doc_rst</span> <span class="o">=</span> <span class="n">doc_rst</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">doc</span> <span class="o">=</span> <span class="n">doc</span> |
| |
| <span class="c1"># Private attributes</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_upstream_task_ids</span><span class="p">:</span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_downstream_task_ids</span><span class="p">:</span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">dag</span> <span class="o">=</span> <span class="n">dag</span> <span class="ow">or</span> <span class="n">DagContext</span><span class="o">.</span><span class="n">get_current_dag</span><span class="p">()</span> |
| |
| <span class="c1"># subdag parameter is only set for SubDagOperator.</span> |
| <span class="c1"># Setting it to None by default as other Operators do not have that field</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">subdag</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">DAG</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s2">"airflow.task.operators"</span><span class="p">)</span> |
| |
| <span class="c1"># Lineage</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inlets</span><span class="p">:</span> <span class="n">List</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">outlets</span><span class="p">:</span> <span class="n">List</span> <span class="o">=</span> <span class="p">[]</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_inlets</span><span class="p">:</span> <span class="n">List</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_outlets</span><span class="p">:</span> <span class="n">List</span> <span class="o">=</span> <span class="p">[]</span> |
| |
| <span class="k">if</span> <span class="n">inlets</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_inlets</span> <span class="o">=</span> <span class="p">(</span> |
| <span class="n">inlets</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">inlets</span><span class="p">,</span> <span class="nb">list</span><span class="p">)</span> |
| <span class="k">else</span> <span class="p">[</span> |
| <span class="n">inlets</span><span class="p">,</span> |
| <span class="p">]</span> |
| <span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">outlets</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_outlets</span> <span class="o">=</span> <span class="p">(</span> |
| <span class="n">outlets</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">outlets</span><span class="p">,</span> <span class="nb">list</span><span class="p">)</span> |
| <span class="k">else</span> <span class="p">[</span> |
| <span class="n">outlets</span><span class="p">,</span> |
| <span class="p">]</span> |
| <span class="p">)</span> |
| |
| <div class="viewcode-block" id="BaseOperator.__eq__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__eq__">[docs]</a> <span class="k">def</span> <span class="fm">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="ow">is</span> <span class="nb">type</span><span class="p">(</span><span class="n">other</span><span class="p">):</span> |
| <span class="c1"># Use getattr() instead of __dict__ as __dict__ doesn't return</span> |
| <span class="c1"># correct values for properties.</span> |
| <span class="k">return</span> <span class="nb">all</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">c</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="o">==</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">c</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_comps</span><span class="p">)</span> |
| <span class="k">return</span> <span class="kc">False</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__ne__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__ne__">[docs]</a> <span class="k">def</span> <span class="fm">__ne__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span> <span class="o">==</span> <span class="n">other</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__hash__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__hash__">[docs]</a> <span class="k">def</span> <span class="fm">__hash__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="n">hash_components</span> <span class="o">=</span> <span class="p">[</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)]</span> |
| <span class="k">for</span> <span class="n">component</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_comps</span><span class="p">:</span> |
| <span class="n">val</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">component</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="nb">hash</span><span class="p">(</span><span class="n">val</span><span class="p">)</span> |
| <span class="n">hash_components</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">val</span><span class="p">)</span> |
| <span class="k">except</span> <span class="ne">TypeError</span><span class="p">:</span> |
| <span class="n">hash_components</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">repr</span><span class="p">(</span><span class="n">val</span><span class="p">))</span> |
| <span class="k">return</span> <span class="nb">hash</span><span class="p">(</span><span class="nb">tuple</span><span class="p">(</span><span class="n">hash_components</span><span class="p">))</span></div> |
| |
| <span class="c1"># including lineage information</span> |
| <div class="viewcode-block" id="BaseOperator.__or__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__or__">[docs]</a> <span class="k">def</span> <span class="fm">__or__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Called for [This Operator] | [Operator], The inlets of other</span> |
| <span class="sd"> will be set to pickup the outlets from this operator. Other will</span> |
| <span class="sd"> be set as a downstream task of this operator.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">BaseOperator</span><span class="p">):</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_outlets</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">supports_lineage</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"No outlets defined for this operator"</span><span class="p">)</span> |
| <span class="n">other</span><span class="o">.</span><span class="n">add_inlets</span><span class="p">([</span><span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">])</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_downstream</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Right hand side (</span><span class="si">{</span><span class="n">other</span><span class="si">}</span><span class="s2">) is not an Operator"</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="bp">self</span></div> |
| |
| <span class="c1"># /Composing Operators ---------------------------------------------</span> |
| |
| <div class="viewcode-block" id="BaseOperator.__gt__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__gt__">[docs]</a> <span class="k">def</span> <span class="fm">__gt__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Called for [Operator] > [Outlet], so that if other is an attr annotated object</span> |
| <span class="sd"> it is set as an outlet of this Operator.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">Iterable</span><span class="p">):</span> |
| <span class="n">other</span> <span class="o">=</span> <span class="p">[</span><span class="n">other</span><span class="p">]</span> |
| |
| <span class="k">for</span> <span class="n">obj</span> <span class="ow">in</span> <span class="n">other</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">attr</span><span class="o">.</span><span class="n">has</span><span class="p">(</span><span class="n">obj</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Left hand side (</span><span class="si">{</span><span class="n">obj</span><span class="si">}</span><span class="s2">) is not an outlet"</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">add_outlets</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="bp">self</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__lt__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__lt__">[docs]</a> <span class="k">def</span> <span class="fm">__lt__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Called for [Inlet] > [Operator] or [Operator] < [Inlet], so that if other is</span> |
| <span class="sd"> an attr annotated object it is set as an inlet to this operator</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">Iterable</span><span class="p">):</span> |
| <span class="n">other</span> <span class="o">=</span> <span class="p">[</span><span class="n">other</span><span class="p">]</span> |
| |
| <span class="k">for</span> <span class="n">obj</span> <span class="ow">in</span> <span class="n">other</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">attr</span><span class="o">.</span><span class="n">has</span><span class="p">(</span><span class="n">obj</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="n">obj</span><span class="si">}</span><span class="s2"> cannot be an inlet"</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">add_inlets</span><span class="p">(</span><span class="n">other</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="bp">self</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__setattr__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__setattr__">[docs]</a> <span class="k">def</span> <span class="fm">__setattr__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__setattr__</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lock_for_execution</span><span class="p">:</span> |
| <span class="c1"># Skip any custom behaviour during execute</span> |
| <span class="k">return</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__instantiated</span> <span class="ow">and</span> <span class="n">key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_fields</span><span class="p">:</span> |
| <span class="c1"># Resolve upstreams set by assigning an XComArg after initializing</span> |
| <span class="c1"># an operator, example:</span> |
| <span class="c1"># op = BashOperator()</span> |
| <span class="c1"># op.bash_command = "sleep 1"</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_xcomargs_dependencies</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.add_inlets"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.add_inlets">[docs]</a> <span class="k">def</span> <span class="nf">add_inlets</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inlets</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="n">Any</span><span class="p">]):</span> |
| <span class="sd">"""Sets inlets to this operator"""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_inlets</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">inlets</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.add_outlets"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.add_outlets">[docs]</a> <span class="k">def</span> <span class="nf">add_outlets</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">outlets</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="n">Any</span><span class="p">]):</span> |
| <span class="sd">"""Defines the outlets of this operator"""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_outlets</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">outlets</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.get_inlet_defs"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_inlet_defs">[docs]</a> <span class="k">def</span> <span class="nf">get_inlet_defs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">""":return: list of inlets defined for this operator"""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inlets</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.get_outlet_defs"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_outlet_defs">[docs]</a> <span class="k">def</span> <span class="nf">get_outlet_defs</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">""":return: list of outlets defined for this operator"""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_outlets</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.dag"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.dag">[docs]</a> <span class="k">def</span> <span class="nf">dag</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="sd">"""Returns the Operator's DAG if set, otherwise raises an error"""</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_dag</span><span class="p">():</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="sa">f</span><span class="s1">'Operator </span><span class="si">{</span><span class="bp">self</span><span class="si">}</span><span class="s1"> has not been assigned to a DAG yet'</span><span class="p">)</span></div> |
| |
| <span class="nd">@dag</span><span class="o">.</span><span class="n">setter</span> |
| <span class="k">def</span> <span class="nf">dag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dag</span><span class="p">:</span> <span class="n">Any</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Operators can be assigned to one DAG, one time. Repeat assignments to</span> |
| <span class="sd"> that same DAG are ok.</span> |
| <span class="sd"> """</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> |
| |
| <span class="k">if</span> <span class="n">dag</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="k">return</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">dag</span><span class="p">,</span> <span class="n">DAG</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="sa">f</span><span class="s1">'Expected DAG; received </span><span class="si">{</span><span class="n">dag</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s1">'</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_dag</span><span class="p">()</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">dag</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="sa">f</span><span class="s2">"The DAG assigned to </span><span class="si">{</span><span class="bp">self</span><span class="si">}</span><span class="s2"> can not be changed."</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">dag</span><span class="o">.</span><span class="n">task_dict</span><span class="p">:</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">add_task</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span> <span class="ow">in</span> <span class="n">dag</span><span class="o">.</span><span class="n">task_dict</span> <span class="ow">and</span> <span class="n">dag</span><span class="o">.</span><span class="n">task_dict</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">]</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">self</span><span class="p">:</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">add_task</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span> <span class="o">=</span> <span class="n">dag</span> |
| |
| <div class="viewcode-block" id="BaseOperator.has_dag"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.has_dag">[docs]</a> <span class="k">def</span> <span class="nf">has_dag</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Returns True if the Operator has been assigned to a DAG."""</span> |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'_dag'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.dag_id"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.dag_id">[docs]</a> <span class="k">def</span> <span class="nf">dag_id</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="sd">"""Returns dag id if it has one or an adhoc + owner"""</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_dag</span><span class="p">():</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="s1">'adhoc_'</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">owner</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.deps"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.deps">[docs]</a> <span class="n">deps</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="n">BaseTIDep</span><span class="p">]</span> <span class="o">=</span> <span class="nb">frozenset</span><span class="p">(</span> |
| <span class="p">{</span> |
| <span class="n">NotInRetryPeriodDep</span><span class="p">(),</span> |
| <span class="n">PrevDagrunDep</span><span class="p">(),</span> |
| <span class="n">TriggerRuleDep</span><span class="p">(),</span> |
| <span class="n">NotPreviouslySkippedDep</span><span class="p">(),</span></div> |
| <span class="p">}</span> |
| <span class="p">)</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Returns the set of dependencies for the operator. These differ from execution</span> |
| <span class="sd"> context dependencies in that they are specific to tasks and can be</span> |
| <span class="sd"> extended/overridden by subclasses.</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="BaseOperator.prepare_for_execution"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.prepare_for_execution">[docs]</a> <span class="k">def</span> <span class="nf">prepare_for_execution</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="s2">"BaseOperator"</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Lock task for execution to disable custom action in __setattr__ and</span> |
| <span class="sd"> returns a copy of the task</span> |
| <span class="sd"> """</span> |
| <span class="n">other</span> <span class="o">=</span> <span class="n">copy</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| <span class="n">other</span><span class="o">.</span><span class="n">_lock_for_execution</span> <span class="o">=</span> <span class="kc">True</span> |
| <span class="k">return</span> <span class="n">other</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.set_xcomargs_dependencies"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.set_xcomargs_dependencies">[docs]</a> <span class="k">def</span> <span class="nf">set_xcomargs_dependencies</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Resolves upstream dependencies of a task. In this way passing an ``XComArg``</span> |
| <span class="sd"> as value for a template field will result in creating upstream relation between</span> |
| <span class="sd"> two tasks.</span> |
| |
| <span class="sd"> **Example**: ::</span> |
| |
| <span class="sd"> with DAG(...):</span> |
| <span class="sd"> generate_content = GenerateContentOperator(task_id="generate_content")</span> |
| <span class="sd"> send_email = EmailOperator(..., html_content=generate_content.output)</span> |
| |
| <span class="sd"> # This is equivalent to</span> |
| <span class="sd"> with DAG(...):</span> |
| <span class="sd"> generate_content = GenerateContentOperator(task_id="generate_content")</span> |
| <span class="sd"> send_email = EmailOperator(</span> |
| <span class="sd"> ..., html_content="{{ task_instance.xcom_pull('generate_content') }}"</span> |
| <span class="sd"> )</span> |
| <span class="sd"> generate_content >> send_email</span> |
| |
| <span class="sd"> """</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.xcom_arg</span> <span class="kn">import</span> <span class="n">XComArg</span> |
| |
| <span class="k">def</span> <span class="nf">apply_set_upstream</span><span class="p">(</span><span class="n">arg</span><span class="p">:</span> <span class="n">Any</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg</span><span class="p">,</span> <span class="n">XComArg</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">set_upstream</span><span class="p">(</span><span class="n">arg</span><span class="o">.</span><span class="n">operator</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg</span><span class="p">,</span> <span class="p">(</span><span class="nb">tuple</span><span class="p">,</span> <span class="nb">set</span><span class="p">,</span> <span class="nb">list</span><span class="p">)):</span> |
| <span class="k">for</span> <span class="n">elem</span> <span class="ow">in</span> <span class="n">arg</span><span class="p">:</span> |
| <span class="n">apply_set_upstream</span><span class="p">(</span><span class="n">elem</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">arg</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> |
| <span class="k">for</span> <span class="n">elem</span> <span class="ow">in</span> <span class="n">arg</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> |
| <span class="n">apply_set_upstream</span><span class="p">(</span><span class="n">elem</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">arg</span><span class="p">,</span> <span class="s2">"template_fields"</span><span class="p">):</span> |
| <span class="k">for</span> <span class="n">elem</span> <span class="ow">in</span> <span class="n">arg</span><span class="o">.</span><span class="n">template_fields</span><span class="p">:</span> |
| <span class="n">apply_set_upstream</span><span class="p">(</span><span class="n">elem</span><span class="p">)</span> |
| |
| <span class="k">for</span> <span class="n">field</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_fields</span><span class="p">:</span> |
| <span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">field</span><span class="p">):</span> |
| <span class="n">arg</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">field</span><span class="p">)</span> |
| <span class="n">apply_set_upstream</span><span class="p">(</span><span class="n">arg</span><span class="p">)</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.priority_weight_total"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.priority_weight_total">[docs]</a> <span class="k">def</span> <span class="nf">priority_weight_total</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Total priority weight for the task. It might include all upstream or downstream tasks.</span> |
| <span class="sd"> depending on the weight rule.</span> |
| |
| <span class="sd"> - WeightRule.ABSOLUTE - only own weight</span> |
| <span class="sd"> - WeightRule.DOWNSTREAM - adds priority weight of all downstream tasks</span> |
| <span class="sd"> - WeightRule.UPSTREAM - adds priority weight of all upstream tasks</span> |
| |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">weight_rule</span> <span class="o">==</span> <span class="n">WeightRule</span><span class="o">.</span><span class="n">ABSOLUTE</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">priority_weight</span> |
| <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">weight_rule</span> <span class="o">==</span> <span class="n">WeightRule</span><span class="o">.</span><span class="n">DOWNSTREAM</span><span class="p">:</span> |
| <span class="n">upstream</span> <span class="o">=</span> <span class="kc">False</span> |
| <span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">weight_rule</span> <span class="o">==</span> <span class="n">WeightRule</span><span class="o">.</span><span class="n">UPSTREAM</span><span class="p">:</span> |
| <span class="n">upstream</span> <span class="o">=</span> <span class="kc">True</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">upstream</span> <span class="o">=</span> <span class="kc">False</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">priority_weight</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> |
| |
| <span class="n">dag</span><span class="p">:</span> <span class="n">DAG</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">priority_weight</span> <span class="o">+</span> <span class="nb">sum</span><span class="p">(</span> |
| <span class="nb">map</span><span class="p">(</span> |
| <span class="k">lambda</span> <span class="n">task_id</span><span class="p">:</span> <span class="n">dag</span><span class="o">.</span><span class="n">task_dict</span><span class="p">[</span><span class="n">task_id</span><span class="p">]</span><span class="o">.</span><span class="n">priority_weight</span><span class="p">,</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">get_flat_relative_ids</span><span class="p">(</span><span class="n">upstream</span><span class="o">=</span><span class="n">upstream</span><span class="p">),</span></div> |
| <span class="p">)</span> |
| <span class="p">)</span> |
| |
| <span class="nd">@cached_property</span> |
| <div class="viewcode-block" id="BaseOperator.operator_extra_link_dict"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.operator_extra_link_dict">[docs]</a> <span class="k">def</span> <span class="nf">operator_extra_link_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span> |
| <span class="sd">"""Returns dictionary of all extra links for the operator"""</span> |
| <span class="n">op_extra_links_from_plugin</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="kn">from</span> <span class="nn">airflow</span> <span class="kn">import</span> <span class="n">plugins_manager</span> |
| |
| <span class="n">plugins_manager</span><span class="o">.</span><span class="n">initialize_extra_operators_links_plugins</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">plugins_manager</span><span class="o">.</span><span class="n">operator_extra_links</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">"Can't load operators"</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">ope</span> <span class="ow">in</span> <span class="n">plugins_manager</span><span class="o">.</span><span class="n">operator_extra_links</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">ope</span><span class="o">.</span><span class="n">operators</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span> <span class="ow">in</span> <span class="n">ope</span><span class="o">.</span><span class="n">operators</span><span class="p">:</span> |
| <span class="n">op_extra_links_from_plugin</span><span class="o">.</span><span class="n">update</span><span class="p">({</span><span class="n">ope</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">ope</span><span class="p">})</span> |
| |
| <span class="n">operator_extra_links_all</span> <span class="o">=</span> <span class="p">{</span><span class="n">link</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">link</span> <span class="k">for</span> <span class="n">link</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">operator_extra_links</span><span class="p">}</span> |
| <span class="c1"># Extra links defined in Plugins overrides operator links defined in operator</span> |
| <span class="n">operator_extra_links_all</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">op_extra_links_from_plugin</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">operator_extra_links_all</span></div> |
| |
| <span class="nd">@cached_property</span> |
| <div class="viewcode-block" id="BaseOperator.global_operator_extra_link_dict"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.global_operator_extra_link_dict">[docs]</a> <span class="k">def</span> <span class="nf">global_operator_extra_link_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]:</span> |
| <span class="sd">"""Returns dictionary of all global extra links"""</span> |
| <span class="kn">from</span> <span class="nn">airflow</span> <span class="kn">import</span> <span class="n">plugins_manager</span> |
| |
| <span class="n">plugins_manager</span><span class="o">.</span><span class="n">initialize_extra_operators_links_plugins</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">plugins_manager</span><span class="o">.</span><span class="n">global_operator_extra_links</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">"Can't load operators"</span><span class="p">)</span> |
| <span class="k">return</span> <span class="p">{</span><span class="n">link</span><span class="o">.</span><span class="n">name</span><span class="p">:</span> <span class="n">link</span> <span class="k">for</span> <span class="n">link</span> <span class="ow">in</span> <span class="n">plugins_manager</span><span class="o">.</span><span class="n">global_operator_extra_links</span><span class="p">}</span></div> |
| |
| <span class="nd">@prepare_lineage</span> |
| <div class="viewcode-block" id="BaseOperator.pre_execute"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.pre_execute">[docs]</a> <span class="k">def</span> <span class="nf">pre_execute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">:</span> <span class="n">Any</span><span class="p">):</span></div> |
| <span class="sd">"""This hook is triggered right before self.execute() is called."""</span> |
| |
| <div class="viewcode-block" id="BaseOperator.execute"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.execute">[docs]</a> <span class="k">def</span> <span class="nf">execute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">:</span> <span class="n">Any</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> This is the main method to derive when creating an operator.</span> |
| <span class="sd"> Context is the same dictionary used as when rendering jinja templates.</span> |
| |
| <span class="sd"> Refer to get_template_context for more context.</span> |
| <span class="sd"> """</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div> |
| |
| <span class="nd">@apply_lineage</span> |
| <div class="viewcode-block" id="BaseOperator.post_execute"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.post_execute">[docs]</a> <span class="k">def</span> <span class="nf">post_execute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> <span class="n">result</span><span class="p">:</span> <span class="n">Any</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span></div> |
| <span class="sd">"""</span> |
| <span class="sd"> This hook is triggered right after self.execute() is called.</span> |
| <span class="sd"> It is passed the execution context and any results returned by the</span> |
| <span class="sd"> operator.</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="BaseOperator.on_kill"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.on_kill">[docs]</a> <span class="k">def</span> <span class="nf">on_kill</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span></div> |
| <span class="sd">"""</span> |
| <span class="sd"> Override this method to cleanup subprocesses when a task instance</span> |
| <span class="sd"> gets killed. Any use of the threading, subprocess or multiprocessing</span> |
| <span class="sd"> module within an operator needs to be cleaned up or it will leave</span> |
| <span class="sd"> ghost processes behind.</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="BaseOperator.__deepcopy__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__deepcopy__">[docs]</a> <span class="k">def</span> <span class="nf">__deepcopy__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">memo</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Hack sorting double chained task lists by task_id to avoid hitting</span> |
| <span class="sd"> max_depth on deepcopy operations.</span> |
| <span class="sd"> """</span> |
| <span class="n">sys</span><span class="o">.</span><span class="n">setrecursionlimit</span><span class="p">(</span><span class="mi">5000</span><span class="p">)</span> <span class="c1"># TODO fix this in a better way</span> |
| <span class="bp">cls</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span> |
| <span class="n">result</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="fm">__new__</span><span class="p">(</span><span class="bp">cls</span><span class="p">)</span> |
| <span class="n">memo</span><span class="p">[</span><span class="nb">id</span><span class="p">(</span><span class="bp">self</span><span class="p">)]</span> <span class="o">=</span> <span class="n">result</span> |
| |
| <span class="n">shallow_copy</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="n">shallow_copy_attrs</span> <span class="o">+</span> <span class="bp">cls</span><span class="o">.</span><span class="n">_base_operator_shallow_copy_attrs</span> |
| |
| <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__dict__</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> |
| <span class="k">if</span> <span class="n">k</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">shallow_copy</span><span class="p">:</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="n">result</span><span class="p">,</span> <span class="n">k</span><span class="p">,</span> <span class="n">copy</span><span class="o">.</span><span class="n">deepcopy</span><span class="p">(</span><span class="n">v</span><span class="p">,</span> <span class="n">memo</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="n">result</span><span class="p">,</span> <span class="n">k</span><span class="p">,</span> <span class="n">copy</span><span class="o">.</span><span class="n">copy</span><span class="p">(</span><span class="n">v</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">result</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__getstate__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__getstate__">[docs]</a> <span class="k">def</span> <span class="nf">__getstate__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="n">state</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">)</span> |
| <span class="k">del</span> <span class="n">state</span><span class="p">[</span><span class="s1">'_log'</span><span class="p">]</span> |
| |
| <span class="k">return</span> <span class="n">state</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__setstate__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__setstate__">[docs]</a> <span class="k">def</span> <span class="nf">__setstate__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">state</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="vm">__dict__</span> <span class="o">=</span> <span class="n">state</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s2">"airflow.task.operators"</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.render_template_fields"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.render_template_fields">[docs]</a> <span class="k">def</span> <span class="nf">render_template_fields</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">:</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">jinja2</span><span class="o">.</span><span class="n">Environment</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Template all attributes listed in template_fields. Note this operation is irreversible.</span> |
| |
| <span class="sd"> :param context: Dict with values to apply on content</span> |
| <span class="sd"> :type context: dict</span> |
| <span class="sd"> :param jinja_env: Jinja environment</span> |
| <span class="sd"> :type jinja_env: jinja2.Environment</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">jinja_env</span><span class="p">:</span> |
| <span class="n">jinja_env</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_template_env</span><span class="p">()</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_do_render_template_fields</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_fields</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">,</span> <span class="nb">set</span><span class="p">())</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator._do_render_template_fields"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator._do_render_template_fields">[docs]</a> <span class="k">def</span> <span class="nf">_do_render_template_fields</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">parent</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="n">template_fields</span><span class="p">:</span> <span class="n">Iterable</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> |
| <span class="n">context</span><span class="p">:</span> <span class="n">Dict</span><span class="p">,</span> |
| <span class="n">jinja_env</span><span class="p">:</span> <span class="n">jinja2</span><span class="o">.</span><span class="n">Environment</span><span class="p">,</span> |
| <span class="n">seen_oids</span><span class="p">:</span> <span class="n">Set</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">attr_name</span> <span class="ow">in</span> <span class="n">template_fields</span><span class="p">:</span> |
| <span class="n">content</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">attr_name</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">content</span><span class="p">:</span> |
| <span class="n">rendered_content</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">render_template</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">,</span> <span class="n">seen_oids</span><span class="p">)</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">attr_name</span><span class="p">,</span> <span class="n">rendered_content</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.render_template"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.render_template">[docs]</a> <span class="k">def</span> <span class="nf">render_template</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">content</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="n">context</span><span class="p">:</span> <span class="n">Dict</span><span class="p">,</span> |
| <span class="n">jinja_env</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">jinja2</span><span class="o">.</span><span class="n">Environment</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">seen_oids</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Set</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Render a templated string. The content can be a collection holding multiple templated strings and will</span> |
| <span class="sd"> be templated recursively.</span> |
| |
| <span class="sd"> :param content: Content to template. Only strings can be templated (may be inside collection).</span> |
| <span class="sd"> :type content: Any</span> |
| <span class="sd"> :param context: Dict with values to apply on templated content</span> |
| <span class="sd"> :type context: dict</span> |
| <span class="sd"> :param jinja_env: Jinja environment. Can be provided to avoid re-creating Jinja environments during</span> |
| <span class="sd"> recursion.</span> |
| <span class="sd"> :type jinja_env: jinja2.Environment</span> |
| <span class="sd"> :param seen_oids: template fields already rendered (to avoid RecursionError on circular dependencies)</span> |
| <span class="sd"> :type seen_oids: set</span> |
| <span class="sd"> :return: Templated content</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">jinja_env</span><span class="p">:</span> |
| <span class="n">jinja_env</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_template_env</span><span class="p">()</span> |
| |
| <span class="c1"># Imported here to avoid circular dependency</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dagparam</span> <span class="kn">import</span> <span class="n">DagParam</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.xcom_arg</span> <span class="kn">import</span> <span class="n">XComArg</span> |
| |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="n">content</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="n">ext</span><span class="p">)</span> <span class="k">for</span> <span class="n">ext</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_ext</span><span class="p">):</span> |
| <span class="c1"># Content contains a filepath</span> |
| <span class="k">return</span> <span class="n">jinja_env</span><span class="o">.</span><span class="n">get_template</span><span class="p">(</span><span class="n">content</span><span class="p">)</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="o">**</span><span class="n">context</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">jinja_env</span><span class="o">.</span><span class="n">from_string</span><span class="p">(</span><span class="n">content</span><span class="p">)</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="o">**</span><span class="n">context</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="p">(</span><span class="n">XComArg</span><span class="p">,</span> <span class="n">DagParam</span><span class="p">)):</span> |
| <span class="k">return</span> <span class="n">content</span><span class="o">.</span><span class="n">resolve</span><span class="p">(</span><span class="n">context</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">type</span><span class="p">(</span><span class="n">content</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="nb">tuple</span><span class="p">:</span> |
| <span class="c1"># Special case for named tuples</span> |
| <span class="k">return</span> <span class="n">content</span><span class="o">.</span><span class="vm">__class__</span><span class="p">(</span> |
| <span class="o">*</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">render_template</span><span class="p">(</span><span class="n">element</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">)</span> <span class="k">for</span> <span class="n">element</span> <span class="ow">in</span> <span class="n">content</span><span class="p">)</span> |
| <span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="nb">tuple</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">render_template</span><span class="p">(</span><span class="n">element</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">)</span> <span class="k">for</span> <span class="n">element</span> <span class="ow">in</span> <span class="n">content</span><span class="p">)</span> |
| |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">render_template</span><span class="p">(</span><span class="n">element</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">)</span> <span class="k">for</span> <span class="n">element</span> <span class="ow">in</span> <span class="n">content</span><span class="p">]</span> |
| |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">dict</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">{</span><span class="n">key</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">render_template</span><span class="p">(</span><span class="n">value</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">)</span> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="n">content</span><span class="o">.</span><span class="n">items</span><span class="p">()}</span> |
| |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">set</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">{</span><span class="bp">self</span><span class="o">.</span><span class="n">render_template</span><span class="p">(</span><span class="n">element</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">)</span> <span class="k">for</span> <span class="n">element</span> <span class="ow">in</span> <span class="n">content</span><span class="p">}</span> |
| |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">seen_oids</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">seen_oids</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_render_nested_template_fields</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">,</span> <span class="n">seen_oids</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">content</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator._render_nested_template_fields"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator._render_nested_template_fields">[docs]</a> <span class="k">def</span> <span class="nf">_render_nested_template_fields</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> <span class="n">content</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> <span class="n">context</span><span class="p">:</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">:</span> <span class="n">jinja2</span><span class="o">.</span><span class="n">Environment</span><span class="p">,</span> <span class="n">seen_oids</span><span class="p">:</span> <span class="n">Set</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">if</span> <span class="nb">id</span><span class="p">(</span><span class="n">content</span><span class="p">)</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">seen_oids</span><span class="p">:</span> |
| <span class="n">seen_oids</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="nb">id</span><span class="p">(</span><span class="n">content</span><span class="p">))</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">nested_template_fields</span> <span class="o">=</span> <span class="n">content</span><span class="o">.</span><span class="n">template_fields</span> |
| <span class="k">except</span> <span class="ne">AttributeError</span><span class="p">:</span> |
| <span class="c1"># content has no inner template fields</span> |
| <span class="k">return</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">_do_render_template_fields</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="n">nested_template_fields</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">jinja_env</span><span class="p">,</span> <span class="n">seen_oids</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.get_template_env"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_template_env">[docs]</a> <span class="k">def</span> <span class="nf">get_template_env</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">jinja2</span><span class="o">.</span><span class="n">Environment</span><span class="p">:</span> |
| <span class="sd">"""Fetch a Jinja template environment from the DAG or instantiate empty environment if no DAG."""</span> |
| <span class="k">return</span> <span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">get_template_env</span><span class="p">()</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_dag</span><span class="p">()</span> |
| <span class="k">else</span> <span class="n">airflow</span><span class="o">.</span><span class="n">templates</span><span class="o">.</span><span class="n">SandboxedEnvironment</span><span class="p">(</span><span class="n">cache_size</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span></div> |
| <span class="p">)</span> |
| |
| <div class="viewcode-block" id="BaseOperator.prepare_template"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.prepare_template">[docs]</a> <span class="k">def</span> <span class="nf">prepare_template</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span></div> |
| <span class="sd">"""</span> |
| <span class="sd"> Hook that is triggered after the templated fields get replaced</span> |
| <span class="sd"> by their content. If you need your operator to alter the</span> |
| <span class="sd"> content of the file before the template is rendered,</span> |
| <span class="sd"> it should override this method to do so.</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="BaseOperator.resolve_template_files"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.resolve_template_files">[docs]</a> <span class="k">def</span> <span class="nf">resolve_template_files</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Getting the content of files for template_field / template_ext"""</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_ext</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">field</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_fields</span><span class="p">:</span> |
| <span class="n">content</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">field</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">content</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">continue</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">str</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span><span class="n">content</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="n">ext</span><span class="p">)</span> <span class="k">for</span> <span class="n">ext</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_ext</span><span class="p">):</span> |
| <span class="n">env</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_template_env</span><span class="p">()</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="nb">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">field</span><span class="p">,</span> <span class="n">env</span><span class="o">.</span><span class="n">loader</span><span class="o">.</span><span class="n">get_source</span><span class="p">(</span><span class="n">env</span><span class="p">,</span> <span class="n">content</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span> |
| <span class="n">env</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">get_template_env</span><span class="p">()</span> |
| <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">content</span><span class="p">)):</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="nb">str</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">any</span><span class="p">(</span> |
| <span class="n">content</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="n">ext</span><span class="p">)</span> <span class="k">for</span> <span class="n">ext</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_ext</span> |
| <span class="p">):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">content</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">loader</span><span class="o">.</span><span class="n">get_source</span><span class="p">(</span><span class="n">env</span><span class="p">,</span> <span class="n">content</span><span class="p">[</span><span class="n">i</span><span class="p">])[</span><span class="mi">0</span><span class="p">]</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">prepare_template</span><span class="p">()</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.upstream_list"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.upstream_list">[docs]</a> <span class="k">def</span> <span class="nf">upstream_list</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="s2">"BaseOperator"</span><span class="p">]:</span> |
| <span class="sd">"""@property: list of tasks directly upstream"""</span> |
| <span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">get_task</span><span class="p">(</span><span class="n">tid</span><span class="p">)</span> <span class="k">for</span> <span class="n">tid</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_upstream_task_ids</span><span class="p">]</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.upstream_task_ids"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.upstream_task_ids">[docs]</a> <span class="k">def</span> <span class="nf">upstream_task_ids</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""@property: set of ids of tasks directly upstream"""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_upstream_task_ids</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.downstream_list"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.downstream_list">[docs]</a> <span class="k">def</span> <span class="nf">downstream_list</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="s2">"BaseOperator"</span><span class="p">]:</span> |
| <span class="sd">"""@property: list of tasks directly downstream"""</span> |
| <span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">get_task</span><span class="p">(</span><span class="n">tid</span><span class="p">)</span> <span class="k">for</span> <span class="n">tid</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_downstream_task_ids</span><span class="p">]</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.downstream_task_ids"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.downstream_task_ids">[docs]</a> <span class="k">def</span> <span class="nf">downstream_task_ids</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""@property: set of ids of tasks directly downstream"""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_downstream_task_ids</span></div> |
| |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="BaseOperator.clear"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.clear">[docs]</a> <span class="k">def</span> <span class="nf">clear</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">start_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">end_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">upstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">downstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">session</span><span class="p">:</span> <span class="n">Session</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Clears the state of task instances associated with the task, following</span> |
| <span class="sd"> the parameters specified.</span> |
| <span class="sd"> """</span> |
| <span class="n">qry</span> <span class="o">=</span> <span class="n">session</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="n">TaskInstance</span><span class="p">)</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">dag_id</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">start_date</span><span class="p">:</span> |
| <span class="n">qry</span> <span class="o">=</span> <span class="n">qry</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">execution_date</span> <span class="o">>=</span> <span class="n">start_date</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">end_date</span><span class="p">:</span> |
| <span class="n">qry</span> <span class="o">=</span> <span class="n">qry</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">execution_date</span> <span class="o"><=</span> <span class="n">end_date</span><span class="p">)</span> |
| |
| <span class="n">tasks</span> <span class="o">=</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">]</span> |
| |
| <span class="k">if</span> <span class="n">upstream</span><span class="p">:</span> |
| <span class="n">tasks</span> <span class="o">+=</span> <span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">task_id</span> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_flat_relatives</span><span class="p">(</span><span class="n">upstream</span><span class="o">=</span><span class="kc">True</span><span class="p">)]</span> |
| |
| <span class="k">if</span> <span class="n">downstream</span><span class="p">:</span> |
| <span class="n">tasks</span> <span class="o">+=</span> <span class="p">[</span><span class="n">t</span><span class="o">.</span><span class="n">task_id</span> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_flat_relatives</span><span class="p">(</span><span class="n">upstream</span><span class="o">=</span><span class="kc">False</span><span class="p">)]</span> |
| |
| <span class="n">qry</span> <span class="o">=</span> <span class="n">qry</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">task_id</span><span class="o">.</span><span class="n">in_</span><span class="p">(</span><span class="n">tasks</span><span class="p">))</span> |
| <span class="n">results</span> <span class="o">=</span> <span class="n">qry</span><span class="o">.</span><span class="n">all</span><span class="p">()</span> |
| <span class="n">count</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">results</span><span class="p">)</span> |
| <span class="n">clear_task_instances</span><span class="p">(</span><span class="n">results</span><span class="p">,</span> <span class="n">session</span><span class="p">,</span> <span class="n">dag</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="p">)</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span> |
| <span class="k">return</span> <span class="n">count</span></div> |
| |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="BaseOperator.get_task_instances"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_task_instances">[docs]</a> <span class="k">def</span> <span class="nf">get_task_instances</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">start_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">end_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">session</span><span class="p">:</span> <span class="n">Session</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="n">TaskInstance</span><span class="p">]:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Get a set of task instance related to this task for a specific date</span> |
| <span class="sd"> range.</span> |
| <span class="sd"> """</span> |
| <span class="n">end_date</span> <span class="o">=</span> <span class="n">end_date</span> <span class="ow">or</span> <span class="n">timezone</span><span class="o">.</span><span class="n">utcnow</span><span class="p">()</span> |
| <span class="k">return</span> <span class="p">(</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="n">TaskInstance</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">dag_id</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">task_id</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">execution_date</span> <span class="o">>=</span> <span class="n">start_date</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">execution_date</span> <span class="o"><=</span> <span class="n">end_date</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">order_by</span><span class="p">(</span><span class="n">TaskInstance</span><span class="o">.</span><span class="n">execution_date</span><span class="p">)</span></div> |
| <span class="o">.</span><span class="n">all</span><span class="p">()</span> |
| <span class="p">)</span> |
| |
| <div class="viewcode-block" id="BaseOperator.get_flat_relative_ids"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_flat_relative_ids">[docs]</a> <span class="k">def</span> <span class="nf">get_flat_relative_ids</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">upstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">found_descendants</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""Get a flat set of relatives' ids, either upstream or downstream."""</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span><span class="p">:</span> |
| <span class="k">return</span> <span class="nb">set</span><span class="p">()</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">found_descendants</span><span class="p">:</span> |
| <span class="n">found_descendants</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span> |
| <span class="n">relative_ids</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_direct_relative_ids</span><span class="p">(</span><span class="n">upstream</span><span class="p">)</span> |
| |
| <span class="k">for</span> <span class="n">relative_id</span> <span class="ow">in</span> <span class="n">relative_ids</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">relative_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">found_descendants</span><span class="p">:</span> |
| <span class="n">found_descendants</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">relative_id</span><span class="p">)</span> |
| <span class="n">relative_task</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span><span class="o">.</span><span class="n">task_dict</span><span class="p">[</span><span class="n">relative_id</span><span class="p">]</span> |
| <span class="n">relative_task</span><span class="o">.</span><span class="n">get_flat_relative_ids</span><span class="p">(</span><span class="n">upstream</span><span class="p">,</span> <span class="n">found_descendants</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">found_descendants</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.get_flat_relatives"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_flat_relatives">[docs]</a> <span class="k">def</span> <span class="nf">get_flat_relatives</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">upstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">):</span> |
| <span class="sd">"""Get a flat list of relatives, either upstream or downstream."""</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span><span class="p">:</span> |
| <span class="k">return</span> <span class="nb">set</span><span class="p">()</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> |
| |
| <span class="n">dag</span><span class="p">:</span> <span class="n">DAG</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_dag</span> |
| <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="k">lambda</span> <span class="n">task_id</span><span class="p">:</span> <span class="n">dag</span><span class="o">.</span><span class="n">task_dict</span><span class="p">[</span><span class="n">task_id</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_flat_relative_ids</span><span class="p">(</span><span class="n">upstream</span><span class="p">)))</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.run"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.run">[docs]</a> <span class="k">def</span> <span class="nf">run</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">start_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">end_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">ignore_first_depends_on_past</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> |
| <span class="n">ignore_ti_state</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">mark_success</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Run a set of task instances for a date range."""</span> |
| <span class="n">start_date</span> <span class="o">=</span> <span class="n">start_date</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">start_date</span> |
| <span class="n">end_date</span> <span class="o">=</span> <span class="n">end_date</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">end_date</span> <span class="ow">or</span> <span class="n">timezone</span><span class="o">.</span><span class="n">utcnow</span><span class="p">()</span> |
| |
| <span class="k">for</span> <span class="n">execution_date</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">date_range</span><span class="p">(</span><span class="n">start_date</span><span class="p">,</span> <span class="n">end_date</span><span class="o">=</span><span class="n">end_date</span><span class="p">):</span> |
| <span class="n">TaskInstance</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">execution_date</span><span class="p">)</span><span class="o">.</span><span class="n">run</span><span class="p">(</span> |
| <span class="n">mark_success</span><span class="o">=</span><span class="n">mark_success</span><span class="p">,</span> |
| <span class="n">ignore_depends_on_past</span><span class="o">=</span><span class="p">(</span><span class="n">execution_date</span> <span class="o">==</span> <span class="n">start_date</span> <span class="ow">and</span> <span class="n">ignore_first_depends_on_past</span><span class="p">),</span> |
| <span class="n">ignore_ti_state</span><span class="o">=</span><span class="n">ignore_ti_state</span><span class="p">,</span></div> |
| <span class="p">)</span> |
| |
| <div class="viewcode-block" id="BaseOperator.dry_run"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.dry_run">[docs]</a> <span class="k">def</span> <span class="nf">dry_run</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Performs dry run for the operator - just render template fields."""</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Dry run'</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">field</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">template_fields</span><span class="p">:</span> |
| <span class="n">content</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">field</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">content</span> <span class="ow">and</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">content</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Rendering template for </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">field</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">content</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.get_direct_relative_ids"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_direct_relative_ids">[docs]</a> <span class="k">def</span> <span class="nf">get_direct_relative_ids</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">upstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Get set of the direct relative ids to the current task, upstream or</span> |
| <span class="sd"> downstream.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">upstream</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_upstream_task_ids</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_downstream_task_ids</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.get_direct_relatives"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_direct_relatives">[docs]</a> <span class="k">def</span> <span class="nf">get_direct_relatives</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">upstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="s2">"BaseOperator"</span><span class="p">]:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Get list of the direct relatives to the current task, upstream or</span> |
| <span class="sd"> downstream.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">upstream</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">upstream_list</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">downstream_list</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.__repr__"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.__repr__">[docs]</a> <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="s2">"<Task(</span><span class="si">{self.task_type}</span><span class="s2">): </span><span class="si">{self.task_id}</span><span class="s2">>"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">=</span><span class="bp">self</span><span class="p">)</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.task_type"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.task_type">[docs]</a> <span class="k">def</span> <span class="nf">task_type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="sd">"""@property: type of the task"""</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.add_only_new"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.add_only_new">[docs]</a> <span class="k">def</span> <span class="nf">add_only_new</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">item_set</span><span class="p">:</span> <span class="n">Set</span><span class="p">[</span><span class="nb">str</span><span class="p">],</span> <span class="n">item</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> <span class="n">dag_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Adds only new items to item set"""</span> |
| <span class="k">if</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">item_set</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s1">'Dependency </span><span class="si">%s</span><span class="s1">, </span><span class="si">%s</span><span class="s1"> already registered for DAG: </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="bp">self</span><span class="p">,</span> <span class="n">item</span><span class="p">,</span> <span class="n">dag_id</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">item_set</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">item</span><span class="p">)</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.roots"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.roots">[docs]</a> <span class="k">def</span> <span class="nf">roots</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="s2">"BaseOperator"</span><span class="p">]:</span> |
| <span class="sd">"""Required by TaskMixin"""</span> |
| <span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="p">]</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.leaves"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.leaves">[docs]</a> <span class="k">def</span> <span class="nf">leaves</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="s2">"BaseOperator"</span><span class="p">]:</span> |
| <span class="sd">"""Required by TaskMixin"""</span> |
| <span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator._set_relatives"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator._set_relatives">[docs]</a> <span class="k">def</span> <span class="nf">_set_relatives</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">task_or_task_list</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">TaskMixin</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">TaskMixin</span><span class="p">]],</span> |
| <span class="n">upstream</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">False</span><span class="p">,</span> |
| <span class="n">edge_modifier</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">EdgeModifier</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Sets relatives for the task or task list."""</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">task_or_task_list</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">):</span> |
| <span class="n">task_or_task_list</span> <span class="o">=</span> <span class="p">[</span><span class="n">task_or_task_list</span><span class="p">]</span> |
| |
| <span class="n">task_list</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="s2">"BaseOperator"</span><span class="p">]</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="k">for</span> <span class="n">task_object</span> <span class="ow">in</span> <span class="n">task_or_task_list</span><span class="p">:</span> |
| <span class="n">task_object</span><span class="o">.</span><span class="n">update_relative</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="ow">not</span> <span class="n">upstream</span><span class="p">)</span> |
| <span class="n">relatives</span> <span class="o">=</span> <span class="n">task_object</span><span class="o">.</span><span class="n">leaves</span> <span class="k">if</span> <span class="n">upstream</span> <span class="k">else</span> <span class="n">task_object</span><span class="o">.</span><span class="n">roots</span> |
| <span class="n">task_list</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">relatives</span><span class="p">)</span> |
| |
| <span class="k">for</span> <span class="n">task</span> <span class="ow">in</span> <span class="n">task_list</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">task</span><span class="p">,</span> <span class="n">BaseOperator</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="s2">"Relationships can only be set between "</span> |
| <span class="s2">"Operators; received </span><span class="si">{}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">task</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">)</span> |
| <span class="p">)</span> |
| |
| <span class="c1"># relationships can only be set if the tasks share a single DAG. Tasks</span> |
| <span class="c1"># without a DAG are assigned to that DAG.</span> |
| <span class="n">dags</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="n">task</span><span class="o">.</span><span class="n">_dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">:</span> <span class="n">task</span><span class="o">.</span><span class="n">_dag</span> <span class="k">for</span> <span class="n">task</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">roots</span> <span class="o">+</span> <span class="n">task_list</span> <span class="k">if</span> <span class="n">task</span><span class="o">.</span><span class="n">has_dag</span><span class="p">()</span> <span class="c1"># type: ignore</span> |
| <span class="p">}</span> |
| |
| <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">dags</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s1">'Tried to set relationships between tasks in more than one DAG: </span><span class="si">{</span><span class="n">dags</span><span class="o">.</span><span class="n">values</span><span class="p">()</span><span class="si">}</span><span class="s1">'</span> |
| <span class="p">)</span> |
| <span class="k">elif</span> <span class="nb">len</span><span class="p">(</span><span class="n">dags</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> |
| <span class="n">dag</span> <span class="o">=</span> <span class="n">dags</span><span class="o">.</span><span class="n">popitem</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="s2">"Tried to create relationships between tasks that don't have "</span> |
| <span class="s2">"DAGs yet. Set the DAG for at least one "</span> |
| <span class="s2">"task and try again: </span><span class="si">{}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">([</span><span class="bp">self</span><span class="p">]</span> <span class="o">+</span> <span class="n">task_list</span><span class="p">)</span> |
| <span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">dag</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_dag</span><span class="p">():</span> |
| <span class="c1"># If this task does not yet have a dag, add it to the same dag as the other task and</span> |
| <span class="c1"># put it in the dag's root TaskGroup.</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dag</span> <span class="o">=</span> <span class="n">dag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">task_group</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> |
| |
| <span class="k">for</span> <span class="n">task</span> <span class="ow">in</span> <span class="n">task_list</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">dag</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">task</span><span class="o">.</span><span class="n">has_dag</span><span class="p">():</span> |
| <span class="c1"># If the other task does not yet have a dag, add it to the same dag as this task and</span> |
| <span class="c1"># put it in the dag's root TaskGroup.</span> |
| <span class="n">task</span><span class="o">.</span><span class="n">dag</span> <span class="o">=</span> <span class="n">dag</span> |
| <span class="n">task</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">task_group</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">task</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">upstream</span><span class="p">:</span> |
| <span class="n">task</span><span class="o">.</span><span class="n">add_only_new</span><span class="p">(</span><span class="n">task</span><span class="o">.</span><span class="n">get_direct_relative_ids</span><span class="p">(</span><span class="n">upstream</span><span class="o">=</span><span class="kc">False</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">add_only_new</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_upstream_task_ids</span><span class="p">,</span> <span class="n">task</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> <span class="n">task</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">edge_modifier</span><span class="p">:</span> |
| <span class="n">edge_modifier</span><span class="o">.</span><span class="n">add_edge_info</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="p">,</span> <span class="n">task</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">add_only_new</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_downstream_task_ids</span><span class="p">,</span> <span class="n">task</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> <span class="n">task</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="n">task</span><span class="o">.</span><span class="n">add_only_new</span><span class="p">(</span><span class="n">task</span><span class="o">.</span><span class="n">get_direct_relative_ids</span><span class="p">(</span><span class="n">upstream</span><span class="o">=</span><span class="kc">True</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">edge_modifier</span><span class="p">:</span> |
| <span class="n">edge_modifier</span><span class="o">.</span><span class="n">add_edge_info</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> <span class="n">task</span><span class="o">.</span><span class="n">task_id</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.set_downstream"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.set_downstream">[docs]</a> <span class="k">def</span> <span class="nf">set_downstream</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">task_or_task_list</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">TaskMixin</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">TaskMixin</span><span class="p">]],</span> |
| <span class="n">edge_modifier</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">EdgeModifier</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Set a task or a task list to be directly downstream from the current</span> |
| <span class="sd"> task. Required by TaskMixin.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_set_relatives</span><span class="p">(</span><span class="n">task_or_task_list</span><span class="p">,</span> <span class="n">upstream</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">edge_modifier</span><span class="o">=</span><span class="n">edge_modifier</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.set_upstream"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.set_upstream">[docs]</a> <span class="k">def</span> <span class="nf">set_upstream</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">task_or_task_list</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">TaskMixin</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">TaskMixin</span><span class="p">]],</span> |
| <span class="n">edge_modifier</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">EdgeModifier</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Set a task or a task list to be directly upstream from the current</span> |
| <span class="sd"> task. Required by TaskMixin.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_set_relatives</span><span class="p">(</span><span class="n">task_or_task_list</span><span class="p">,</span> <span class="n">upstream</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">edge_modifier</span><span class="o">=</span><span class="n">edge_modifier</span><span class="p">)</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.output"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.output">[docs]</a> <span class="k">def</span> <span class="nf">output</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Returns reference to XCom pushed by current operator"""</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.xcom_arg</span> <span class="kn">import</span> <span class="n">XComArg</span> |
| |
| <span class="k">return</span> <span class="n">XComArg</span><span class="p">(</span><span class="n">operator</span><span class="o">=</span><span class="bp">self</span><span class="p">)</span></div> |
| |
| <span class="nd">@staticmethod</span> |
| <div class="viewcode-block" id="BaseOperator.xcom_push"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.xcom_push">[docs]</a> <span class="k">def</span> <span class="nf">xcom_push</span><span class="p">(</span> |
| <span class="n">context</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="n">key</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">value</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Make an XCom available for tasks to pull.</span> |
| |
| <span class="sd"> :param context: Execution Context Dictionary</span> |
| <span class="sd"> :type: Any</span> |
| <span class="sd"> :param key: A key for the XCom</span> |
| <span class="sd"> :type key: str</span> |
| <span class="sd"> :param value: A value for the XCom. The value is pickled and stored</span> |
| <span class="sd"> in the database.</span> |
| <span class="sd"> :type value: any pickleable object</span> |
| <span class="sd"> :param execution_date: if provided, the XCom will not be visible until</span> |
| <span class="sd"> this date. This can be used, for example, to send a message to a</span> |
| <span class="sd"> task on a future date without it being immediately visible.</span> |
| <span class="sd"> :type execution_date: datetime</span> |
| <span class="sd"> """</span> |
| <span class="n">context</span><span class="p">[</span><span class="s1">'ti'</span><span class="p">]</span><span class="o">.</span><span class="n">xcom_push</span><span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="o">=</span><span class="n">value</span><span class="p">,</span> <span class="n">execution_date</span><span class="o">=</span><span class="n">execution_date</span><span class="p">)</span></div> |
| |
| <span class="nd">@staticmethod</span> |
| <div class="viewcode-block" id="BaseOperator.xcom_pull"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.xcom_pull">[docs]</a> <span class="k">def</span> <span class="nf">xcom_pull</span><span class="p">(</span> |
| <span class="n">context</span><span class="p">:</span> <span class="n">Any</span><span class="p">,</span> |
| <span class="n">task_ids</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">dag_id</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">key</span><span class="p">:</span> <span class="nb">str</span> <span class="o">=</span> <span class="n">XCOM_RETURN_KEY</span><span class="p">,</span> |
| <span class="n">include_prior_dates</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Pull XComs that optionally meet certain criteria.</span> |
| |
| <span class="sd"> The default value for `key` limits the search to XComs</span> |
| <span class="sd"> that were returned by other tasks (as opposed to those that were pushed</span> |
| <span class="sd"> manually). To remove this filter, pass key=None (or any desired value).</span> |
| |
| <span class="sd"> If a single task_id string is provided, the result is the value of the</span> |
| <span class="sd"> most recent matching XCom from that task_id. If multiple task_ids are</span> |
| <span class="sd"> provided, a tuple of matching values is returned. None is returned</span> |
| <span class="sd"> whenever no matches are found.</span> |
| |
| <span class="sd"> :param context: Execution Context Dictionary</span> |
| <span class="sd"> :type: Any</span> |
| <span class="sd"> :param key: A key for the XCom. If provided, only XComs with matching</span> |
| <span class="sd"> keys will be returned. The default key is 'return_value', also</span> |
| <span class="sd"> available as a constant XCOM_RETURN_KEY. This key is automatically</span> |
| <span class="sd"> given to XComs returned by tasks (as opposed to being pushed</span> |
| <span class="sd"> manually). To remove the filter, pass key=None.</span> |
| <span class="sd"> :type key: str</span> |
| <span class="sd"> :param task_ids: Only XComs from tasks with matching ids will be</span> |
| <span class="sd"> pulled. Can pass None to remove the filter.</span> |
| <span class="sd"> :type task_ids: str or iterable of strings (representing task_ids)</span> |
| <span class="sd"> :param dag_id: If provided, only pulls XComs from this DAG.</span> |
| <span class="sd"> If None (default), the DAG of the calling task is used.</span> |
| <span class="sd"> :type dag_id: str</span> |
| <span class="sd"> :param include_prior_dates: If False, only XComs from the current</span> |
| <span class="sd"> execution_date are returned. If True, XComs from previous dates</span> |
| <span class="sd"> are returned as well.</span> |
| <span class="sd"> :type include_prior_dates: bool</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="n">context</span><span class="p">[</span><span class="s1">'ti'</span><span class="p">]</span><span class="o">.</span><span class="n">xcom_pull</span><span class="p">(</span> |
| <span class="n">key</span><span class="o">=</span><span class="n">key</span><span class="p">,</span> <span class="n">task_ids</span><span class="o">=</span><span class="n">task_ids</span><span class="p">,</span> <span class="n">dag_id</span><span class="o">=</span><span class="n">dag_id</span><span class="p">,</span> <span class="n">include_prior_dates</span><span class="o">=</span><span class="n">include_prior_dates</span></div> |
| <span class="p">)</span> |
| |
| <span class="nd">@cached_property</span> |
| <div class="viewcode-block" id="BaseOperator.extra_links"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.extra_links">[docs]</a> <span class="k">def</span> <span class="nf">extra_links</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""@property: extra links for the task"""</span> |
| <span class="k">return</span> <span class="nb">list</span><span class="p">(</span> |
| <span class="nb">set</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">operator_extra_link_dict</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span><span class="o">.</span><span class="n">union</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">global_operator_extra_link_dict</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span></div> |
| <span class="p">)</span> |
| |
| <div class="viewcode-block" id="BaseOperator.get_extra_links"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_extra_links">[docs]</a> <span class="k">def</span> <span class="nf">get_extra_links</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dttm</span><span class="p">:</span> <span class="n">datetime</span><span class="p">,</span> <span class="n">link_name</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="n">Optional</span><span class="p">[</span><span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">Any</span><span class="p">]]:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> For an operator, gets the URL that the external links specified in</span> |
| <span class="sd"> `extra_links` should point to.</span> |
| |
| <span class="sd"> :raise ValueError: The error message of a ValueError will be passed on through to</span> |
| <span class="sd"> the fronted to show up as a tooltip on the disabled link</span> |
| <span class="sd"> :param dttm: The datetime parsed execution date for the URL being searched for</span> |
| <span class="sd"> :param link_name: The name of the link we're looking for the URL for. Should be</span> |
| <span class="sd"> one of the options specified in `extra_links`</span> |
| <span class="sd"> :return: A URL</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">link_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">operator_extra_link_dict</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">operator_extra_link_dict</span><span class="p">[</span><span class="n">link_name</span><span class="p">]</span><span class="o">.</span><span class="n">get_link</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dttm</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="n">link_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">global_operator_extra_link_dict</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">global_operator_extra_link_dict</span><span class="p">[</span><span class="n">link_name</span><span class="p">]</span><span class="o">.</span><span class="n">get_link</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dttm</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="kc">None</span></div> |
| |
| <span class="nd">@classmethod</span> |
| <div class="viewcode-block" id="BaseOperator.get_serialized_fields"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.get_serialized_fields">[docs]</a> <span class="k">def</span> <span class="nf">get_serialized_fields</span><span class="p">(</span><span class="bp">cls</span><span class="p">):</span> |
| <span class="sd">"""Stringified DAGs and operators contain exactly these fields."""</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">cls</span><span class="o">.</span><span class="n">__serialized_fields</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DagContext</span> |
| |
| <span class="c1"># make sure the following dummy task is not added to current active</span> |
| <span class="c1"># dag in context, otherwise, it will result in</span> |
| <span class="c1"># `RuntimeError: dictionary changed size during iteration`</span> |
| <span class="c1"># Exception in SerializedDAG.serialize_dag() call.</span> |
| <span class="n">DagContext</span><span class="o">.</span><span class="n">push_context_managed_dag</span><span class="p">(</span><span class="kc">None</span><span class="p">)</span> |
| <span class="bp">cls</span><span class="o">.</span><span class="n">__serialized_fields</span> <span class="o">=</span> <span class="nb">frozenset</span><span class="p">(</span> |
| <span class="nb">vars</span><span class="p">(</span><span class="n">BaseOperator</span><span class="p">(</span><span class="n">task_id</span><span class="o">=</span><span class="s1">'test'</span><span class="p">))</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span> |
| <span class="o">-</span> <span class="p">{</span> |
| <span class="s1">'inlets'</span><span class="p">,</span> |
| <span class="s1">'outlets'</span><span class="p">,</span> |
| <span class="s1">'_upstream_task_ids'</span><span class="p">,</span> |
| <span class="s1">'default_args'</span><span class="p">,</span> |
| <span class="s1">'dag'</span><span class="p">,</span> |
| <span class="s1">'_dag'</span><span class="p">,</span> |
| <span class="s1">'_BaseOperator__instantiated'</span><span class="p">,</span> |
| <span class="p">}</span> |
| <span class="o">|</span> <span class="p">{</span> |
| <span class="s1">'_task_type'</span><span class="p">,</span> |
| <span class="s1">'subdag'</span><span class="p">,</span> |
| <span class="s1">'ui_color'</span><span class="p">,</span> |
| <span class="s1">'ui_fgcolor'</span><span class="p">,</span> |
| <span class="s1">'template_fields'</span><span class="p">,</span> |
| <span class="s1">'template_fields_renderers'</span><span class="p">,</span> |
| <span class="p">}</span> |
| <span class="p">)</span> |
| <span class="n">DagContext</span><span class="o">.</span><span class="n">pop_context_managed_dag</span><span class="p">()</span> |
| |
| <span class="k">return</span> <span class="bp">cls</span><span class="o">.</span><span class="n">__serialized_fields</span></div> |
| |
| <div class="viewcode-block" id="BaseOperator.is_smart_sensor_compatible"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.is_smart_sensor_compatible">[docs]</a> <span class="k">def</span> <span class="nf">is_smart_sensor_compatible</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Return if this operator can use smart service. Default False."""</span> |
| <span class="k">return</span> <span class="kc">False</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="BaseOperator.inherits_from_dummy_operator"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperator.inherits_from_dummy_operator">[docs]</a> <span class="k">def</span> <span class="nf">inherits_from_dummy_operator</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Used to determine if an Operator is inherited from DummyOperator"""</span> |
| <span class="c1"># This looks like `isinstance(self, DummyOperator) would work, but this also</span> |
| <span class="c1"># needs to cope when `self` is a Serialized instance of a DummyOperator or one</span> |
| <span class="c1"># of its sub-classes (which don't inherit from anything but BaseOperator).</span> |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'_is_dummy'</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span></div></div> |
| |
| |
| <div class="viewcode-block" id="chain"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.chain">[docs]</a><span class="k">def</span> <span class="nf">chain</span><span class="p">(</span><span class="o">*</span><span class="n">tasks</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">BaseOperator</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">BaseOperator</span><span class="p">]]):</span> |
| <span class="sa">r</span><span class="sd">"""</span> |
| <span class="sd"> Given a number of tasks, builds a dependency chain.</span> |
| <span class="sd"> Support mix airflow.models.BaseOperator and List[airflow.models.BaseOperator].</span> |
| <span class="sd"> If you want to chain between two List[airflow.models.BaseOperator], have to</span> |
| <span class="sd"> make sure they have same length.</span> |
| |
| <span class="sd"> .. code-block:: python</span> |
| |
| <span class="sd"> chain(t1, [t2, t3], [t4, t5], t6)</span> |
| |
| <span class="sd"> is equivalent to::</span> |
| |
| <span class="sd"> / -> t2 -> t4 \</span> |
| <span class="sd"> t1 -> t6</span> |
| <span class="sd"> \ -> t3 -> t5 /</span> |
| |
| <span class="sd"> .. code-block:: python</span> |
| |
| <span class="sd"> t1.set_downstream(t2)</span> |
| <span class="sd"> t1.set_downstream(t3)</span> |
| <span class="sd"> t2.set_downstream(t4)</span> |
| <span class="sd"> t3.set_downstream(t5)</span> |
| <span class="sd"> t4.set_downstream(t6)</span> |
| <span class="sd"> t5.set_downstream(t6)</span> |
| |
| <span class="sd"> :param tasks: List of tasks or List[airflow.models.BaseOperator] to set dependencies</span> |
| <span class="sd"> :type tasks: List[airflow.models.BaseOperator] or airflow.models.BaseOperator</span> |
| <span class="sd"> """</span> |
| <span class="k">for</span> <span class="n">index</span><span class="p">,</span> <span class="n">up_task</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">tasks</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]):</span> |
| <span class="n">down_task</span> <span class="o">=</span> <span class="n">tasks</span><span class="p">[</span><span class="n">index</span> <span class="o">+</span> <span class="mi">1</span><span class="p">]</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">up_task</span><span class="p">,</span> <span class="n">BaseOperator</span><span class="p">):</span> |
| <span class="n">up_task</span><span class="o">.</span><span class="n">set_downstream</span><span class="p">(</span><span class="n">down_task</span><span class="p">)</span> |
| <span class="k">continue</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">down_task</span><span class="p">,</span> <span class="n">BaseOperator</span><span class="p">):</span> |
| <span class="n">down_task</span><span class="o">.</span><span class="n">set_upstream</span><span class="p">(</span><span class="n">up_task</span><span class="p">)</span> |
| <span class="k">continue</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">up_task</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">)</span> <span class="ow">or</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">down_task</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span> |
| <span class="s1">'Chain not supported between instances of </span><span class="si">{up_type}</span><span class="s1"> and </span><span class="si">{down_type}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">up_type</span><span class="o">=</span><span class="nb">type</span><span class="p">(</span><span class="n">up_task</span><span class="p">),</span> <span class="n">down_type</span><span class="o">=</span><span class="nb">type</span><span class="p">(</span><span class="n">down_task</span><span class="p">)</span> |
| <span class="p">)</span> |
| <span class="p">)</span> |
| <span class="n">up_task_list</span> <span class="o">=</span> <span class="n">up_task</span> |
| <span class="n">down_task_list</span> <span class="o">=</span> <span class="n">down_task</span> |
| <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">up_task_list</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">down_task_list</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s1">'Chain not supported different length Iterable '</span> |
| <span class="sa">f</span><span class="s1">'but get </span><span class="si">{</span><span class="nb">len</span><span class="p">(</span><span class="n">up_task_list</span><span class="p">)</span><span class="si">}</span><span class="s1"> and </span><span class="si">{</span><span class="nb">len</span><span class="p">(</span><span class="n">down_task_list</span><span class="p">)</span><span class="si">}</span><span class="s1">'</span> |
| <span class="p">)</span> |
| <span class="k">for</span> <span class="n">up_t</span><span class="p">,</span> <span class="n">down_t</span> <span class="ow">in</span> <span class="nb">zip</span><span class="p">(</span><span class="n">up_task_list</span><span class="p">,</span> <span class="n">down_task_list</span><span class="p">):</span> |
| <span class="n">up_t</span><span class="o">.</span><span class="n">set_downstream</span><span class="p">(</span><span class="n">down_t</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="cross_downstream"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.cross_downstream">[docs]</a><span class="k">def</span> <span class="nf">cross_downstream</span><span class="p">(</span> |
| <span class="n">from_tasks</span><span class="p">:</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">BaseOperator</span><span class="p">],</span> <span class="n">to_tasks</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="n">BaseOperator</span><span class="p">,</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">BaseOperator</span><span class="p">]]</span> |
| <span class="p">):</span> |
| <span class="sa">r</span><span class="sd">"""</span> |
| <span class="sd"> Set downstream dependencies for all tasks in from_tasks to all tasks in to_tasks.</span> |
| |
| <span class="sd"> .. code-block:: python</span> |
| |
| <span class="sd"> cross_downstream(from_tasks=[t1, t2, t3], to_tasks=[t4, t5, t6])</span> |
| |
| <span class="sd"> is equivalent to::</span> |
| |
| <span class="sd"> t1 ---> t4</span> |
| <span class="sd"> \ /</span> |
| <span class="sd"> t2 -X -> t5</span> |
| <span class="sd"> / \</span> |
| <span class="sd"> t3 ---> t6</span> |
| |
| |
| <span class="sd"> .. code-block:: python</span> |
| |
| <span class="sd"> t1.set_downstream(t4)</span> |
| <span class="sd"> t1.set_downstream(t5)</span> |
| <span class="sd"> t1.set_downstream(t6)</span> |
| <span class="sd"> t2.set_downstream(t4)</span> |
| <span class="sd"> t2.set_downstream(t5)</span> |
| <span class="sd"> t2.set_downstream(t6)</span> |
| <span class="sd"> t3.set_downstream(t4)</span> |
| <span class="sd"> t3.set_downstream(t5)</span> |
| <span class="sd"> t3.set_downstream(t6)</span> |
| |
| <span class="sd"> :param from_tasks: List of tasks to start from.</span> |
| <span class="sd"> :type from_tasks: List[airflow.models.BaseOperator]</span> |
| <span class="sd"> :param to_tasks: List of tasks to set as downstream dependencies.</span> |
| <span class="sd"> :type to_tasks: List[airflow.models.BaseOperator]</span> |
| <span class="sd"> """</span> |
| <span class="k">for</span> <span class="n">task</span> <span class="ow">in</span> <span class="n">from_tasks</span><span class="p">:</span> |
| <span class="n">task</span><span class="o">.</span><span class="n">set_downstream</span><span class="p">(</span><span class="n">to_tasks</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="BaseOperatorLink"><a class="viewcode-back" href="../../../_api/airflow/models/index.html#airflow.models.baseoperator.BaseOperatorLink">[docs]</a><span class="nd">@attr</span><span class="o">.</span><span class="n">s</span><span class="p">(</span><span class="n">auto_attribs</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> |
| <span class="k">class</span> <span class="nc">BaseOperatorLink</span><span class="p">(</span><span class="n">metaclass</span><span class="o">=</span><span class="n">ABCMeta</span><span class="p">):</span> |
| <span class="sd">"""Abstract base class that defines how we get an operator link."""</span> |
| |
| <div class="viewcode-block" id="BaseOperatorLink.operators"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperatorLink.operators">[docs]</a> <span class="n">operators</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="n">Type</span><span class="p">[</span><span class="n">BaseOperator</span><span class="p">]]]</span> <span class="o">=</span> <span class="p">[]</span></div> |
| <span class="sd">"""</span> |
| <span class="sd"> This property will be used by Airflow Plugins to find the Operators to which you want</span> |
| <span class="sd"> to assign this Operator Link</span> |
| |
| <span class="sd"> :return: List of Operator classes used by task for which you want to create extra link</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@property</span> |
| <span class="nd">@abstractmethod</span> |
| <div class="viewcode-block" id="BaseOperatorLink.name"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperatorLink.name">[docs]</a> <span class="k">def</span> <span class="nf">name</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span></div> |
| <span class="sd">"""</span> |
| <span class="sd"> Name of the link. This will be the button name on the task UI.</span> |
| |
| <span class="sd"> :return: link name</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@abstractmethod</span> |
| <div class="viewcode-block" id="BaseOperatorLink.get_link"><a class="viewcode-back" href="../../../_api/airflow/models/baseoperator/index.html#airflow.models.baseoperator.BaseOperatorLink.get_link">[docs]</a> <span class="k">def</span> <span class="nf">get_link</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">operator</span><span class="p">:</span> <span class="n">BaseOperator</span><span class="p">,</span> <span class="n">dttm</span><span class="p">:</span> <span class="n">datetime</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span></div></div> |
| <span class="sd">"""</span> |
| <span class="sd"> Link to external system.</span> |
| |
| <span class="sd"> :param operator: airflow operator</span> |
| <span class="sd"> :param dttm: datetime</span> |
| <span class="sd"> :return: link to external system</span> |
| <span class="sd"> """</span> |
| </pre></div> |
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