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| <h1>Source code for airflow.models.xcom</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="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">annotations</span> |
| |
| <span class="kn">import</span> <span class="nn">datetime</span> |
| <span class="kn">import</span> <span class="nn">inspect</span> |
| <span class="kn">import</span> <span class="nn">json</span> |
| <span class="kn">import</span> <span class="nn">logging</span> |
| <span class="kn">import</span> <span class="nn">pickle</span> |
| <span class="kn">import</span> <span class="nn">warnings</span> |
| <span class="kn">from</span> <span class="nn">functools</span> <span class="kn">import</span> <span class="n">wraps</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">TYPE_CHECKING</span><span class="p">,</span> <span class="n">Any</span><span class="p">,</span> <span class="n">Iterable</span><span class="p">,</span> <span class="n">cast</span><span class="p">,</span> <span class="n">overload</span> |
| |
| <span class="kn">import</span> <span class="nn">pendulum</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy</span> <span class="kn">import</span> <span class="p">(</span> |
| <span class="n">Column</span><span class="p">,</span> |
| <span class="n">ForeignKeyConstraint</span><span class="p">,</span> |
| <span class="n">Index</span><span class="p">,</span> |
| <span class="n">Integer</span><span class="p">,</span> |
| <span class="n">LargeBinary</span><span class="p">,</span> |
| <span class="n">PrimaryKeyConstraint</span><span class="p">,</span> |
| <span class="n">String</span><span class="p">,</span> |
| <span class="n">text</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.ext.associationproxy</span> <span class="kn">import</span> <span class="n">association_proxy</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.orm</span> <span class="kn">import</span> <span class="n">Query</span><span class="p">,</span> <span class="n">Session</span><span class="p">,</span> <span class="n">reconstructor</span><span class="p">,</span> <span class="n">relationship</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.orm.exc</span> <span class="kn">import</span> <span class="n">NoResultFound</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">RemovedInAirflow3Warning</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.base</span> <span class="kn">import</span> <span class="n">COLLATION_ARGS</span><span class="p">,</span> <span class="n">ID_LEN</span><span class="p">,</span> <span class="n">Base</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.helpers</span> <span class="kn">import</span> <span class="n">exactly_one</span><span class="p">,</span> <span class="n">is_container</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.session</span> <span class="kn">import</span> <span class="n">NEW_SESSION</span><span class="p">,</span> <span class="n">provide_session</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.sqlalchemy</span> <span class="kn">import</span> <span class="n">UtcDateTime</span> |
| |
| <div class="viewcode-block" id="log"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.log">[docs]</a><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="vm">__name__</span><span class="p">)</span></div> |
| |
| <span class="c1"># MAX XCOM Size is 48KB</span> |
| <span class="c1"># https://github.com/apache/airflow/pull/1618#discussion_r68249677</span> |
| <div class="viewcode-block" id="MAX_XCOM_SIZE"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.MAX_XCOM_SIZE">[docs]</a><span class="n">MAX_XCOM_SIZE</span> <span class="o">=</span> <span class="mi">49344</span></div> |
| <div class="viewcode-block" id="XCOM_RETURN_KEY"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.XCOM_RETURN_KEY">[docs]</a><span class="n">XCOM_RETURN_KEY</span> <span class="o">=</span> <span class="s1">'return_value'</span></div> |
| |
| <span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.taskinstance</span> <span class="kn">import</span> <span class="n">TaskInstanceKey</span> |
| |
| |
| <div class="viewcode-block" id="BaseXCom"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom">[docs]</a><span class="k">class</span> <span class="nc">BaseXCom</span><span class="p">(</span><span class="n">Base</span><span class="p">,</span> <span class="n">LoggingMixin</span><span class="p">):</span> |
| <span class="sd">"""Base class for XCom objects."""</span> |
| |
| <div class="viewcode-block" id="BaseXCom.__tablename__"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.__tablename__">[docs]</a> <span class="n">__tablename__</span> <span class="o">=</span> <span class="s2">"xcom"</span></div> |
| |
| <div class="viewcode-block" id="BaseXCom.dag_run_id"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.dag_run_id">[docs]</a> <span class="n">dag_run_id</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">Integer</span><span class="p">(),</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">primary_key</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="BaseXCom.task_id"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.task_id">[docs]</a> <span class="n">task_id</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">String</span><span class="p">(</span><span class="n">ID_LEN</span><span class="p">,</span> <span class="o">**</span><span class="n">COLLATION_ARGS</span><span class="p">),</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">primary_key</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="BaseXCom.map_index"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.map_index">[docs]</a> <span class="n">map_index</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">Integer</span><span class="p">,</span> <span class="n">primary_key</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">server_default</span><span class="o">=</span><span class="n">text</span><span class="p">(</span><span class="s2">"-1"</span><span class="p">))</span></div> |
| <div class="viewcode-block" id="BaseXCom.key"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.key">[docs]</a> <span class="n">key</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">String</span><span class="p">(</span><span class="mi">512</span><span class="p">,</span> <span class="o">**</span><span class="n">COLLATION_ARGS</span><span class="p">),</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">primary_key</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| |
| <span class="c1"># Denormalized for easier lookup.</span> |
| <div class="viewcode-block" id="BaseXCom.dag_id"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.dag_id">[docs]</a> <span class="n">dag_id</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">String</span><span class="p">(</span><span class="n">ID_LEN</span><span class="p">,</span> <span class="o">**</span><span class="n">COLLATION_ARGS</span><span class="p">),</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="BaseXCom.run_id"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.run_id">[docs]</a> <span class="n">run_id</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">String</span><span class="p">(</span><span class="n">ID_LEN</span><span class="p">,</span> <span class="o">**</span><span class="n">COLLATION_ARGS</span><span class="p">),</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseXCom.value"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.value">[docs]</a> <span class="n">value</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">LargeBinary</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="BaseXCom.timestamp"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.timestamp">[docs]</a> <span class="n">timestamp</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">UtcDateTime</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">timezone</span><span class="o">.</span><span class="n">utcnow</span><span class="p">,</span> <span class="n">nullable</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseXCom.__table_args__"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.__table_args__">[docs]</a> <span class="n">__table_args__</span> <span class="o">=</span> <span class="p">(</span> |
| <span class="c1"># Ideally we should create a unique index over (key, dag_id, task_id, run_id),</span> |
| <span class="c1"># but it goes over MySQL's index length limit. So we instead index 'key'</span> |
| <span class="c1"># separately, and enforce uniqueness with DagRun.id instead.</span> |
| <span class="n">Index</span><span class="p">(</span><span class="s2">"idx_xcom_key"</span><span class="p">,</span> <span class="n">key</span><span class="p">),</span> |
| <span class="n">Index</span><span class="p">(</span><span class="s2">"idx_xcom_task_instance"</span><span class="p">,</span> <span class="n">dag_id</span><span class="p">,</span> <span class="n">task_id</span><span class="p">,</span> <span class="n">run_id</span><span class="p">,</span> <span class="n">map_index</span><span class="p">),</span> |
| <span class="n">PrimaryKeyConstraint</span><span class="p">(</span> |
| <span class="s2">"dag_run_id"</span><span class="p">,</span> <span class="s2">"task_id"</span><span class="p">,</span> <span class="s2">"map_index"</span><span class="p">,</span> <span class="s2">"key"</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="s2">"xcom_pkey"</span><span class="p">,</span> <span class="n">mssql_clustered</span><span class="o">=</span><span class="kc">True</span> |
| <span class="p">),</span> |
| <span class="n">ForeignKeyConstraint</span><span class="p">(</span> |
| <span class="p">[</span><span class="n">dag_id</span><span class="p">,</span> <span class="n">task_id</span><span class="p">,</span> <span class="n">run_id</span><span class="p">,</span> <span class="n">map_index</span><span class="p">],</span> |
| <span class="p">[</span> |
| <span class="s2">"task_instance.dag_id"</span><span class="p">,</span> |
| <span class="s2">"task_instance.task_id"</span><span class="p">,</span> |
| <span class="s2">"task_instance.run_id"</span><span class="p">,</span> |
| <span class="s2">"task_instance.map_index"</span><span class="p">,</span> |
| <span class="p">],</span> |
| <span class="n">name</span><span class="o">=</span><span class="s2">"xcom_task_instance_fkey"</span><span class="p">,</span> |
| <span class="n">ondelete</span><span class="o">=</span><span class="s2">"CASCADE"</span><span class="p">,</span></div> |
| <span class="p">),</span> |
| <span class="p">)</span> |
| |
| <div class="viewcode-block" id="BaseXCom.dag_run"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.dag_run">[docs]</a> <span class="n">dag_run</span> <span class="o">=</span> <span class="n">relationship</span><span class="p">(</span> |
| <span class="s2">"DagRun"</span><span class="p">,</span> |
| <span class="n">primaryjoin</span><span class="o">=</span><span class="s2">"BaseXCom.dag_run_id == foreign(DagRun.id)"</span><span class="p">,</span> |
| <span class="n">uselist</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="n">lazy</span><span class="o">=</span><span class="s2">"joined"</span><span class="p">,</span> |
| <span class="n">passive_deletes</span><span class="o">=</span><span class="s2">"all"</span><span class="p">,</span></div> |
| <span class="p">)</span> |
| <div class="viewcode-block" id="BaseXCom.execution_date"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.execution_date">[docs]</a> <span class="n">execution_date</span> <span class="o">=</span> <span class="n">association_proxy</span><span class="p">(</span><span class="s2">"dag_run"</span><span class="p">,</span> <span class="s2">"execution_date"</span><span class="p">)</span></div> |
| |
| <span class="nd">@reconstructor</span> |
| <div class="viewcode-block" id="BaseXCom.init_on_load"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.init_on_load">[docs]</a> <span class="k">def</span> <span class="nf">init_on_load</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Called by the ORM after the instance has been loaded from the DB or otherwise reconstituted</span> |
| <span class="sd"> i.e automatically deserialize Xcom value when loading from DB.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">orm_deserialize_value</span><span class="p">()</span></div> |
| |
| <div class="viewcode-block" id="BaseXCom.__repr__"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.__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">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">map_index</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">return</span> <span class="sa">f</span><span class="s1">'<XCom "</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s1">" (</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="s1"> @ </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">run_id</span><span class="si">}</span><span class="s1">)>'</span> |
| <span class="k">return</span> <span class="sa">f</span><span class="s1">'<XCom "</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">key</span><span class="si">}</span><span class="s1">" (</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="s1">[</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">map_index</span><span class="si">}</span><span class="s1">] @ </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">run_id</span><span class="si">}</span><span class="s1">)>'</span></div> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">set</span><span class="p">(</span> |
| <span class="bp">cls</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="o">*</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="n">task_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</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="n">NEW_SESSION</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">"""Store an XCom value.</span> |
| |
| <span class="sd"> A deprecated form of this function accepts ``execution_date`` instead of</span> |
| <span class="sd"> ``run_id``. The two arguments are mutually exclusive.</span> |
| |
| <span class="sd"> :param key: Key to store the XCom.</span> |
| <span class="sd"> :param value: XCom value to store.</span> |
| <span class="sd"> :param dag_id: DAG ID.</span> |
| <span class="sd"> :param task_id: Task ID.</span> |
| <span class="sd"> :param run_id: DAG run ID for the task.</span> |
| <span class="sd"> :param map_index: Optional map index to assign XCom for a mapped task.</span> |
| <span class="sd"> The default is ``-1`` (set for a non-mapped task).</span> |
| <span class="sd"> :param session: Database session. If not given, a new session will be</span> |
| <span class="sd"> created for this function.</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">set</span><span class="p">(</span> |
| <span class="bp">cls</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">task_id</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="n">execution_date</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</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="n">NEW_SESSION</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">""":sphinx-autoapi-skip:"""</span> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <span class="k">def</span> <span class="nf">set</span><span class="p">(</span> |
| <span class="bp">cls</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">task_id</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="n">execution_date</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</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">""":sphinx-autoapi-skip:"""</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dagrun</span> <span class="kn">import</span> <span class="n">DagRun</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">exactly_one</span><span class="p">(</span><span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">,</span> <span class="n">run_id</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s2">"Exactly one of run_id or execution_date must be passed. "</span> |
| <span class="sa">f</span><span class="s2">"Passed execution_date=</span><span class="si">{</span><span class="n">execution_date</span><span class="si">}</span><span class="s2">, run_id=</span><span class="si">{</span><span class="n">run_id</span><span class="si">}</span><span class="s2">"</span> |
| <span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">run_id</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">message</span> <span class="o">=</span> <span class="s2">"Passing 'execution_date' to 'XCom.set()' is deprecated. Use 'run_id' instead."</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">RemovedInAirflow3Warning</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="k">try</span><span class="p">:</span> |
| <span class="n">dag_run_id</span><span class="p">,</span> <span class="n">run_id</span> <span class="o">=</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">DagRun</span><span class="o">.</span><span class="n">id</span><span class="p">,</span> <span class="n">DagRun</span><span class="o">.</span><span class="n">run_id</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">DagRun</span><span class="o">.</span><span class="n">dag_id</span> <span class="o">==</span> <span class="n">dag_id</span><span class="p">,</span> <span class="n">DagRun</span><span class="o">.</span><span class="n">execution_date</span> <span class="o">==</span> <span class="n">execution_date</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">one</span><span class="p">()</span> |
| <span class="p">)</span> |
| <span class="k">except</span> <span class="n">NoResultFound</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"DAG run not found on DAG </span><span class="si">{</span><span class="n">dag_id</span><span class="si">!r}</span><span class="s2"> at </span><span class="si">{</span><span class="n">execution_date</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> <span class="kn">from</span> <span class="bp">None</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">dag_run_id</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">DagRun</span><span class="o">.</span><span class="n">id</span><span class="p">)</span><span class="o">.</span><span class="n">filter_by</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">run_id</span><span class="o">=</span><span class="n">run_id</span><span class="p">)</span><span class="o">.</span><span class="n">scalar</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">dag_run_id</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"DAG run not found on DAG </span><span class="si">{</span><span class="n">dag_id</span><span class="si">!r}</span><span class="s2"> with ID </span><span class="si">{</span><span class="n">run_id</span><span class="si">!r}</span><span class="s2">"</span><span class="p">)</span> |
| |
| <span class="n">value</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="n">serialize_value</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">key</span><span class="o">=</span><span class="n">key</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="n">task_id</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">run_id</span><span class="o">=</span><span class="n">run_id</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="o">=</span><span class="n">map_index</span><span class="p">,</span> |
| <span class="p">)</span> |
| |
| <span class="c1"># Remove duplicate XComs and insert a new one.</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="bp">cls</span><span class="p">)</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="n">key</span><span class="p">,</span> |
| <span class="bp">cls</span><span class="o">.</span><span class="n">run_id</span> <span class="o">==</span> <span class="n">run_id</span><span class="p">,</span> |
| <span class="bp">cls</span><span class="o">.</span><span class="n">task_id</span> <span class="o">==</span> <span class="n">task_id</span><span class="p">,</span> |
| <span class="bp">cls</span><span class="o">.</span><span class="n">dag_id</span> <span class="o">==</span> <span class="n">dag_id</span><span class="p">,</span> |
| <span class="bp">cls</span><span class="o">.</span><span class="n">map_index</span> <span class="o">==</span> <span class="n">map_index</span><span class="p">,</span> |
| <span class="p">)</span><span class="o">.</span><span class="n">delete</span><span class="p">()</span> |
| <span class="n">new</span> <span class="o">=</span> <span class="n">cast</span><span class="p">(</span><span class="n">Any</span><span class="p">,</span> <span class="bp">cls</span><span class="p">)(</span> <span class="c1"># Work around Mypy complaining model not defining '__init__'.</span> |
| <span class="n">dag_run_id</span><span class="o">=</span><span class="n">dag_run_id</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">run_id</span><span class="o">=</span><span class="n">run_id</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="o">=</span><span class="n">task_id</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">map_index</span><span class="o">=</span><span class="n">map_index</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">new</span><span class="p">)</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="BaseXCom.get_value"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.get_value">[docs]</a> <span class="k">def</span> <span class="nf">get_value</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">ti_key</span><span class="p">:</span> <span class="n">TaskInstanceKey</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="kc">None</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="n">NEW_SESSION</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">"""Retrieve an XCom value for a task instance.</span> |
| |
| <span class="sd"> This method returns "full" XCom values (i.e. uses ``deserialize_value``</span> |
| <span class="sd"> from the XCom backend). Use :meth:`get_many` if you want the "shortened"</span> |
| <span class="sd"> value via ``orm_deserialize_value``.</span> |
| |
| <span class="sd"> If there are no results, *None* is returned. If multiple XCom entries</span> |
| <span class="sd"> match the criteria, an arbitrary one is returned.</span> |
| |
| <span class="sd"> :param ti_key: The TaskInstanceKey to look up the XCom for.</span> |
| <span class="sd"> :param key: A key for the XCom. If provided, only XCom with matching</span> |
| <span class="sd"> keys will be returned. Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param session: Database session. If not given, a new session will be</span> |
| <span class="sd"> created for this function.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">cls</span><span class="o">.</span><span class="n">get_one</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_id</span><span class="o">=</span><span class="n">ti_key</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> |
| <span class="n">dag_id</span><span class="o">=</span><span class="n">ti_key</span><span class="o">.</span><span class="n">dag_id</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="o">=</span><span class="n">ti_key</span><span class="o">.</span><span class="n">run_id</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="o">=</span><span class="n">ti_key</span><span class="o">.</span><span class="n">map_index</span><span class="p">,</span> |
| <span class="n">session</span><span class="o">=</span><span class="n">session</span><span class="p">,</span></div> |
| <span class="p">)</span> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">get_one</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="o">*</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="kc">None</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="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Any</span> <span class="o">|</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Retrieve an XCom value, optionally meeting certain criteria.</span> |
| |
| <span class="sd"> This method returns "full" XCom values (i.e. uses ``deserialize_value``</span> |
| <span class="sd"> from the XCom backend). Use :meth:`get_many` if you want the "shortened"</span> |
| <span class="sd"> value via ``orm_deserialize_value``.</span> |
| |
| <span class="sd"> If there are no results, *None* is returned. If multiple XCom entries</span> |
| <span class="sd"> match the criteria, an arbitrary one is returned.</span> |
| |
| <span class="sd"> A deprecated form of this function accepts ``execution_date`` instead of</span> |
| <span class="sd"> ``run_id``. The two arguments are mutually exclusive.</span> |
| |
| <span class="sd"> .. seealso:: ``get_value()`` is a convenience function if you already</span> |
| <span class="sd"> have a structured TaskInstance or TaskInstanceKey object available.</span> |
| |
| <span class="sd"> :param run_id: DAG run ID for the task.</span> |
| <span class="sd"> :param dag_id: Only pull XCom from this DAG. Pass *None* (default) to</span> |
| <span class="sd"> remove the filter.</span> |
| <span class="sd"> :param task_id: Only XCom from task with matching ID will be pulled.</span> |
| <span class="sd"> Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param map_index: Only XCom from task with matching ID will be pulled.</span> |
| <span class="sd"> Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param key: A key for the XCom. If provided, only XCom with matching</span> |
| <span class="sd"> keys will be returned. Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param include_prior_dates: If *False* (default), only XCom from the</span> |
| <span class="sd"> specified DAG run is returned. If *True*, the latest matching XCom is</span> |
| <span class="sd"> returned regardless of the run it belongs to.</span> |
| <span class="sd"> :param session: Database session. If not given, a new session will be</span> |
| <span class="sd"> created for this function.</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">get_one</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</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="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</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="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">include_prior_dates</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Any</span> <span class="o">|</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">""":sphinx-autoapi-skip:"""</span> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <span class="k">def</span> <span class="nf">get_one</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span> <span class="o">|</span> <span class="kc">None</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="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</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="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">include_prior_dates</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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="o">|</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">""":sphinx-autoapi-skip:"""</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">exactly_one</span><span class="p">(</span><span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">,</span> <span class="n">run_id</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Exactly one of ti_key, run_id, or execution_date must be passed"</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">run_id</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="n">get_many</span><span class="p">(</span> |
| <span class="n">run_id</span><span class="o">=</span><span class="n">run_id</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_id</span><span class="p">,</span> |
| <span class="n">dag_ids</span><span class="o">=</span><span class="n">dag_id</span><span class="p">,</span> |
| <span class="n">map_indexes</span><span class="o">=</span><span class="n">map_index</span><span class="p">,</span> |
| <span class="n">include_prior_dates</span><span class="o">=</span><span class="n">include_prior_dates</span><span class="p">,</span> |
| <span class="n">limit</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> |
| <span class="n">session</span><span class="o">=</span><span class="n">session</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="k">elif</span> <span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">message</span> <span class="o">=</span> <span class="s2">"Passing 'execution_date' to 'XCom.get_one()' is deprecated. Use 'run_id' instead."</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">RemovedInAirflow3Warning</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="k">with</span> <span class="n">warnings</span><span class="o">.</span><span class="n">catch_warnings</span><span class="p">():</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">simplefilter</span><span class="p">(</span><span class="s2">"ignore"</span><span class="p">,</span> <span class="n">RemovedInAirflow3Warning</span><span class="p">)</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="n">get_many</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> |
| <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_id</span><span class="p">,</span> |
| <span class="n">dag_ids</span><span class="o">=</span><span class="n">dag_id</span><span class="p">,</span> |
| <span class="n">map_indexes</span><span class="o">=</span><span class="n">map_index</span><span class="p">,</span> |
| <span class="n">include_prior_dates</span><span class="o">=</span><span class="n">include_prior_dates</span><span class="p">,</span> |
| <span class="n">limit</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> |
| <span class="n">session</span><span class="o">=</span><span class="n">session</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Should not happen?"</span><span class="p">)</span> |
| |
| <span class="n">result</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">with_entities</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">value</span><span class="p">)</span><span class="o">.</span><span class="n">first</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">result</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">cls</span><span class="o">.</span><span class="n">deserialize_value</span><span class="p">(</span><span class="n">result</span><span class="p">)</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">get_many</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</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="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_ids</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">dag_ids</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_indexes</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="n">Iterable</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">include_prior_dates</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">limit</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Query</span><span class="p">:</span> |
| <span class="sd">"""Composes a query to get one or more XCom entries.</span> |
| |
| <span class="sd"> This function returns an SQLAlchemy query of full XCom objects. If you</span> |
| <span class="sd"> just want one stored value, use :meth:`get_one` instead.</span> |
| |
| <span class="sd"> A deprecated form of this function accepts ``execution_date`` instead of</span> |
| <span class="sd"> ``run_id``. The two arguments are mutually exclusive.</span> |
| |
| <span class="sd"> :param run_id: DAG run ID for the task.</span> |
| <span class="sd"> :param key: A key for the XComs. If provided, only XComs with matching</span> |
| <span class="sd"> keys will be returned. Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param task_ids: Only XComs from task with matching IDs will be pulled.</span> |
| <span class="sd"> Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param dag_ids: Only pulls XComs from specified DAGs. Pass *None*</span> |
| <span class="sd"> (default) to remove the filter.</span> |
| <span class="sd"> :param map_indexes: Only XComs from matching map indexes will be pulled.</span> |
| <span class="sd"> Pass *None* (default) to remove the filter.</span> |
| <span class="sd"> :param include_prior_dates: If *False* (default), only XComs from the</span> |
| <span class="sd"> specified DAG run are returned. If *True*, all matching XComs are</span> |
| <span class="sd"> returned regardless of the run it belongs to.</span> |
| <span class="sd"> :param session: Database session. If not given, a new session will be</span> |
| <span class="sd"> created for this function.</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">get_many</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</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="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_ids</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">dag_ids</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_indexes</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="n">Iterable</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">include_prior_dates</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">limit</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="p">)</span> <span class="o">-></span> <span class="n">Query</span><span class="p">:</span> |
| <span class="sd">""":sphinx-autoapi-skip:"""</span> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <span class="k">def</span> <span class="nf">get_many</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">datetime</span><span class="o">.</span><span class="n">datetime</span> <span class="o">|</span> <span class="kc">None</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="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_ids</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">dag_ids</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_indexes</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="n">Iterable</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="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">include_prior_dates</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">limit</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</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">Query</span><span class="p">:</span> |
| <span class="sd">""":sphinx-autoapi-skip:"""</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dagrun</span> <span class="kn">import</span> <span class="n">DagRun</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">exactly_one</span><span class="p">(</span><span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">,</span> <span class="n">run_id</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s2">"Exactly one of run_id or execution_date must be passed. "</span> |
| <span class="sa">f</span><span class="s2">"Passed execution_date=</span><span class="si">{</span><span class="n">execution_date</span><span class="si">}</span><span class="s2">, run_id=</span><span class="si">{</span><span class="n">run_id</span><span class="si">}</span><span class="s2">"</span> |
| <span class="p">)</span> |
| <span class="k">if</span> <span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">message</span> <span class="o">=</span> <span class="s2">"Passing 'execution_date' to 'XCom.get_many()' is deprecated. Use 'run_id' instead."</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">RemovedInAirflow3Warning</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="n">query</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="bp">cls</span><span class="p">)</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">dag_run</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">key</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="n">key</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">is_container</span><span class="p">(</span><span class="n">task_ids</span><span class="p">):</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</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">task_ids</span><span class="p">))</span> |
| <span class="k">elif</span> <span class="n">task_ids</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">task_id</span> <span class="o">==</span> <span class="n">task_ids</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">is_container</span><span class="p">(</span><span class="n">dag_ids</span><span class="p">):</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">dag_id</span><span class="o">.</span><span class="n">in_</span><span class="p">(</span><span class="n">dag_ids</span><span class="p">))</span> |
| <span class="k">elif</span> <span class="n">dag_ids</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">dag_id</span> <span class="o">==</span> <span class="n">dag_ids</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">is_container</span><span class="p">(</span><span class="n">map_indexes</span><span class="p">):</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">map_index</span><span class="o">.</span><span class="n">in_</span><span class="p">(</span><span class="n">map_indexes</span><span class="p">))</span> |
| <span class="k">elif</span> <span class="n">map_indexes</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">map_index</span> <span class="o">==</span> <span class="n">map_indexes</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">include_prior_dates</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">DagRun</span><span class="o">.</span><span class="n">execution_date</span> <span class="o"><=</span> <span class="n">execution_date</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">dr</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">DagRun</span><span class="o">.</span><span class="n">execution_date</span><span class="p">)</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">DagRun</span><span class="o">.</span><span class="n">run_id</span> <span class="o">==</span> <span class="n">run_id</span><span class="p">)</span><span class="o">.</span><span class="n">subquery</span><span class="p">()</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">execution_date</span> <span class="o"><=</span> <span class="n">dr</span><span class="o">.</span><span class="n">c</span><span class="o">.</span><span class="n">execution_date</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">DagRun</span><span class="o">.</span><span class="n">execution_date</span> <span class="o">==</span> <span class="n">execution_date</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="bp">cls</span><span class="o">.</span><span class="n">run_id</span> <span class="o">==</span> <span class="n">run_id</span><span class="p">)</span> |
| |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">order_by</span><span class="p">(</span><span class="n">DagRun</span><span class="o">.</span><span class="n">execution_date</span><span class="o">.</span><span class="n">desc</span><span class="p">(),</span> <span class="bp">cls</span><span class="o">.</span><span class="n">timestamp</span><span class="o">.</span><span class="n">desc</span><span class="p">())</span> |
| <span class="k">if</span> <span class="n">limit</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">query</span><span class="o">.</span><span class="n">limit</span><span class="p">(</span><span class="n">limit</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">query</span> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="BaseXCom.delete"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.delete">[docs]</a> <span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">cls</span><span class="p">,</span> <span class="n">xcoms</span><span class="p">:</span> <span class="n">XCom</span> <span class="o">|</span> <span class="n">Iterable</span><span class="p">[</span><span class="n">XCom</span><span class="p">],</span> <span class="n">session</span><span class="p">:</span> <span class="n">Session</span><span class="p">)</span> <span class="o">-></span> <span class="kc">None</span><span class="p">:</span> |
| <span class="sd">"""Delete one or multiple XCom entries."""</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">xcoms</span><span class="p">,</span> <span class="n">XCom</span><span class="p">):</span> |
| <span class="n">xcoms</span> <span class="o">=</span> <span class="p">[</span><span class="n">xcoms</span><span class="p">]</span> |
| <span class="k">for</span> <span class="n">xcom</span> <span class="ow">in</span> <span class="n">xcoms</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">xcom</span><span class="p">,</span> <span class="n">XCom</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 XCom; received </span><span class="si">{</span><span class="n">xcom</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="n">session</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">xcom</span><span class="p">)</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span></div> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">clear</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="o">*</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="n">task_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</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">"""Clear all XCom data from the database for the given task instance.</span> |
| |
| <span class="sd"> A deprecated form of this function accepts ``execution_date`` instead of</span> |
| <span class="sd"> ``run_id``. The two arguments are mutually exclusive.</span> |
| |
| <span class="sd"> :param dag_id: ID of DAG to clear the XCom for.</span> |
| <span class="sd"> :param task_id: ID of task to clear the XCom for.</span> |
| <span class="sd"> :param run_id: ID of DAG run to clear the XCom for.</span> |
| <span class="sd"> :param map_index: If given, only clear XCom from this particular mapped</span> |
| <span class="sd"> task. The default ``None`` clears *all* XComs from the task.</span> |
| <span class="sd"> :param session: Database session. If not given, a new session will be</span> |
| <span class="sd"> created for this function.</span> |
| <span class="sd"> """</span> |
| |
| <span class="nd">@overload</span> |
| <span class="nd">@classmethod</span> |
| <span class="k">def</span> <span class="nf">clear</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">pendulum</span><span class="o">.</span><span class="n">DateTime</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="n">task_id</span><span class="p">:</span> <span class="nb">str</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="n">NEW_SESSION</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">""":sphinx-autoapi-skip:"""</span> |
| |
| <span class="nd">@classmethod</span> |
| <span class="nd">@provide_session</span> |
| <span class="k">def</span> <span class="nf">clear</span><span class="p">(</span> |
| <span class="bp">cls</span><span class="p">,</span> |
| <span class="n">execution_date</span><span class="p">:</span> <span class="n">pendulum</span><span class="o">.</span><span class="n">DateTime</span> <span class="o">|</span> <span class="kc">None</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="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</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="n">NEW_SESSION</span><span class="p">,</span> |
| <span class="o">*</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</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">""":sphinx-autoapi-skip:"""</span> |
| <span class="kn">from</span> <span class="nn">airflow.models</span> <span class="kn">import</span> <span class="n">DagRun</span> |
| |
| <span class="c1"># Given the historic order of this function (execution_date was first argument) to add a new optional</span> |
| <span class="c1"># param we need to add default values for everything :(</span> |
| <span class="k">if</span> <span class="n">dag_id</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s2">"clear() missing required argument: dag_id"</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">task_id</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s2">"clear() missing required argument: task_id"</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">exactly_one</span><span class="p">(</span><span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">,</span> <span class="n">run_id</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s2">"Exactly one of run_id or execution_date must be passed. "</span> |
| <span class="sa">f</span><span class="s2">"Passed execution_date=</span><span class="si">{</span><span class="n">execution_date</span><span class="si">}</span><span class="s2">, run_id=</span><span class="si">{</span><span class="n">run_id</span><span class="si">}</span><span class="s2">"</span> |
| <span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">execution_date</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">message</span> <span class="o">=</span> <span class="s2">"Passing 'execution_date' to 'XCom.clear()' is deprecated. Use 'run_id' instead."</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">RemovedInAirflow3Warning</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="n">run_id</span> <span class="o">=</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">DagRun</span><span class="o">.</span><span class="n">run_id</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">DagRun</span><span class="o">.</span><span class="n">dag_id</span> <span class="o">==</span> <span class="n">dag_id</span><span class="p">,</span> <span class="n">DagRun</span><span class="o">.</span><span class="n">execution_date</span> <span class="o">==</span> <span class="n">execution_date</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">scalar</span><span class="p">()</span> |
| <span class="p">)</span> |
| |
| <span class="n">query</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="bp">cls</span><span class="p">)</span><span class="o">.</span><span class="n">filter_by</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">task_id</span><span class="o">=</span><span class="n">task_id</span><span class="p">,</span> <span class="n">run_id</span><span class="o">=</span><span class="n">run_id</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">map_index</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">query</span> <span class="o">=</span> <span class="n">query</span><span class="o">.</span><span class="n">filter_by</span><span class="p">(</span><span class="n">map_index</span><span class="o">=</span><span class="n">map_index</span><span class="p">)</span> |
| <span class="n">query</span><span class="o">.</span><span class="n">delete</span><span class="p">()</span> |
| |
| <span class="nd">@staticmethod</span> |
| <div class="viewcode-block" id="BaseXCom.serialize_value"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.serialize_value">[docs]</a> <span class="k">def</span> <span class="nf">serialize_value</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="o">*</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="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">task_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</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="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">run_id</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">map_index</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="sd">"""Serialize XCom value to str or pickled object"""</span> |
| <span class="k">if</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'enable_xcom_pickling'</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">pickle</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">value</span><span class="p">)</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'UTF-8'</span><span class="p">)</span> |
| <span class="k">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">TypeError</span><span class="p">):</span> |
| <span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span> |
| <span class="s2">"Could not serialize the XCom value into JSON."</span> |
| <span class="s2">" If you are using pickle instead of JSON for XCom,"</span> |
| <span class="s2">" then you need to enable pickle support for XCom"</span> |
| <span class="s2">" in your airflow config."</span> |
| <span class="p">)</span> |
| <span class="k">raise</span></div> |
| |
| <span class="nd">@staticmethod</span> |
| <div class="viewcode-block" id="BaseXCom.deserialize_value"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.deserialize_value">[docs]</a> <span class="k">def</span> <span class="nf">deserialize_value</span><span class="p">(</span><span class="n">result</span><span class="p">:</span> <span class="n">XCom</span><span class="p">)</span> <span class="o">-></span> <span class="n">Any</span><span class="p">:</span> |
| <span class="sd">"""Deserialize XCom value from str or pickle object"""</span> |
| <span class="k">if</span> <span class="n">result</span><span class="o">.</span><span class="n">value</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| <span class="k">if</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'enable_xcom_pickling'</span><span class="p">):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">pickle</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">value</span><span class="p">)</span> |
| <span class="k">except</span> <span class="n">pickle</span><span class="o">.</span><span class="n">UnpicklingError</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">value</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'UTF-8'</span><span class="p">))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">value</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'UTF-8'</span><span class="p">))</span> |
| <span class="k">except</span> <span class="p">(</span><span class="n">json</span><span class="o">.</span><span class="n">JSONDecodeError</span><span class="p">,</span> <span class="ne">UnicodeDecodeError</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">pickle</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">result</span><span class="o">.</span><span class="n">value</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="BaseXCom.orm_deserialize_value"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.BaseXCom.orm_deserialize_value">[docs]</a> <span class="k">def</span> <span class="nf">orm_deserialize_value</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">"""</span> |
| <span class="sd"> Deserialize method which is used to reconstruct ORM XCom object.</span> |
| |
| <span class="sd"> This method should be overridden in custom XCom backends to avoid</span> |
| <span class="sd"> unnecessary request or other resource consuming operations when</span> |
| <span class="sd"> creating XCom orm model. This is used when viewing XCom listing</span> |
| <span class="sd"> in the webserver, for example.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="n">BaseXCom</span><span class="o">.</span><span class="n">deserialize_value</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span></div></div> |
| |
| |
| <span class="k">def</span> <span class="nf">_patch_outdated_serializer</span><span class="p">(</span><span class="n">clazz</span><span class="p">:</span> <span class="nb">type</span><span class="p">[</span><span class="n">BaseXCom</span><span class="p">],</span> <span class="n">params</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="sd">"""Patch a custom ``serialize_value`` to accept the modern signature.</span> |
| |
| <span class="sd"> To give custom XCom backends more flexibility with how they store values, we</span> |
| <span class="sd"> now forward all params passed to ``XCom.set`` to ``XCom.serialize_value``.</span> |
| <span class="sd"> In order to maintain compatibility with custom XCom backends written with</span> |
| <span class="sd"> the old signature, we check the signature and, if necessary, patch with a</span> |
| <span class="sd"> method that ignores kwargs the backend does not accept.</span> |
| <span class="sd"> """</span> |
| <span class="n">old_serializer</span> <span class="o">=</span> <span class="n">clazz</span><span class="o">.</span><span class="n">serialize_value</span> |
| |
| <span class="nd">@wraps</span><span class="p">(</span><span class="n">old_serializer</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">_shim</span><span class="p">(</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="n">kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">k</span><span class="p">)</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">params</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="sa">f</span><span class="s2">"Method `serialize_value` in XCom backend </span><span class="si">{</span><span class="n">XCom</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> is using outdated signature and"</span> |
| <span class="sa">f</span><span class="s2">"must be updated to accept all params in `BaseXCom.set` except `session`. Support will be "</span> |
| <span class="sa">f</span><span class="s2">"removed in a future release."</span><span class="p">,</span> |
| <span class="n">RemovedInAirflow3Warning</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="k">return</span> <span class="n">old_serializer</span><span class="p">(</span><span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="n">clazz</span><span class="o">.</span><span class="n">serialize_value</span> <span class="o">=</span> <span class="n">_shim</span> <span class="c1"># type: ignore[assignment]</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_get_function_params</span><span class="p">(</span><span class="n">function</span><span class="p">)</span> <span class="o">-></span> <span class="nb">list</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Returns the list of variables names of a function</span> |
| |
| <span class="sd"> :param function: The function to inspect</span> |
| <span class="sd"> :rtype: List[str]</span> |
| <span class="sd"> """</span> |
| <span class="n">parameters</span> <span class="o">=</span> <span class="n">inspect</span><span class="o">.</span><span class="n">signature</span><span class="p">(</span><span class="n">function</span><span class="p">)</span><span class="o">.</span><span class="n">parameters</span> |
| <span class="n">bound_arguments</span> <span class="o">=</span> <span class="p">[</span> |
| <span class="n">name</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">p</span> <span class="ow">in</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">p</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">p</span><span class="o">.</span><span class="n">VAR_POSITIONAL</span><span class="p">,</span> <span class="n">p</span><span class="o">.</span><span class="n">VAR_KEYWORD</span><span class="p">)</span> |
| <span class="p">]</span> |
| <span class="k">return</span> <span class="n">bound_arguments</span> |
| |
| |
| <div class="viewcode-block" id="resolve_xcom_backend"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.resolve_xcom_backend">[docs]</a><span class="k">def</span> <span class="nf">resolve_xcom_backend</span><span class="p">()</span> <span class="o">-></span> <span class="nb">type</span><span class="p">[</span><span class="n">BaseXCom</span><span class="p">]:</span> |
| <span class="sd">"""Resolves custom XCom class</span> |
| |
| <span class="sd"> Confirms that custom XCom class extends the BaseXCom.</span> |
| <span class="sd"> Compares the function signature of the custom XCom serialize_value to the base XCom serialize_value.</span> |
| <span class="sd"> """</span> |
| <span class="n">clazz</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getimport</span><span class="p">(</span><span class="s2">"core"</span><span class="p">,</span> <span class="s2">"xcom_backend"</span><span class="p">,</span> <span class="n">fallback</span><span class="o">=</span><span class="sa">f</span><span class="s2">"airflow.models.xcom.</span><span class="si">{</span><span class="n">BaseXCom</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">clazz</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">BaseXCom</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">issubclass</span><span class="p">(</span><span class="n">clazz</span><span class="p">,</span> <span class="n">BaseXCom</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">"Your custom XCom class `</span><span class="si">{</span><span class="n">clazz</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">` is not a subclass of `</span><span class="si">{</span><span class="n">BaseXCom</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2">`."</span> |
| <span class="p">)</span> |
| <span class="n">base_xcom_params</span> <span class="o">=</span> <span class="n">_get_function_params</span><span class="p">(</span><span class="n">BaseXCom</span><span class="o">.</span><span class="n">serialize_value</span><span class="p">)</span> |
| <span class="n">xcom_params</span> <span class="o">=</span> <span class="n">_get_function_params</span><span class="p">(</span><span class="n">clazz</span><span class="o">.</span><span class="n">serialize_value</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="nb">set</span><span class="p">(</span><span class="n">base_xcom_params</span><span class="p">)</span> <span class="o">==</span> <span class="nb">set</span><span class="p">(</span><span class="n">xcom_params</span><span class="p">):</span> |
| <span class="n">_patch_outdated_serializer</span><span class="p">(</span><span class="n">clazz</span><span class="o">=</span><span class="n">clazz</span><span class="p">,</span> <span class="n">params</span><span class="o">=</span><span class="n">xcom_params</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">clazz</span></div> |
| |
| |
| <span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span> |
| <div class="viewcode-block" id="XCom"><a class="viewcode-back" href="../../../_api/airflow/models/xcom/index.html#airflow.models.xcom.XCom">[docs]</a> <span class="n">XCom</span> <span class="o">=</span> <span class="n">BaseXCom</span> <span class="c1"># Hack to avoid Mypy "Variable 'XCom' is not valid as a type".</span></div> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">XCom</span> <span class="o">=</span> <span class="n">resolve_xcom_backend</span><span class="p">()</span> |
| </pre></div> |
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