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| <h1>Source code for airflow.models.dagbag</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">import</span> <span class="nn">hashlib</span> |
| <span class="kn">import</span> <span class="nn">importlib</span> |
| <span class="kn">import</span> <span class="nn">importlib.machinery</span> |
| <span class="kn">import</span> <span class="nn">importlib.util</span> |
| <span class="kn">import</span> <span class="nn">os</span> |
| <span class="kn">import</span> <span class="nn">sys</span> |
| <span class="kn">import</span> <span class="nn">textwrap</span> |
| <span class="kn">import</span> <span class="nn">traceback</span> |
| <span class="kn">import</span> <span class="nn">warnings</span> |
| <span class="kn">import</span> <span class="nn">zipfile</span> |
| <span class="kn">from</span> <span class="nn">datetime</span> <span class="kn">import</span> <span class="n">datetime</span><span class="p">,</span> <span class="n">timedelta</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">TYPE_CHECKING</span><span class="p">,</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">NamedTuple</span><span class="p">,</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Union</span> |
| |
| <span class="kn">from</span> <span class="nn">croniter</span> <span class="kn">import</span> <span class="n">CroniterBadCronError</span><span class="p">,</span> <span class="n">CroniterBadDateError</span><span class="p">,</span> <span class="n">CroniterNotAlphaError</span><span class="p">,</span> <span class="n">croniter</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.exc</span> <span class="kn">import</span> <span class="n">OperationalError</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy.orm</span> <span class="kn">import</span> <span class="n">Session</span> |
| <span class="kn">from</span> <span class="nn">tabulate</span> <span class="kn">import</span> <span class="n">tabulate</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow</span> <span class="kn">import</span> <span class="n">settings</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="p">(</span> |
| <span class="n">AirflowClusterPolicyViolation</span><span class="p">,</span> |
| <span class="n">AirflowDagCycleException</span><span class="p">,</span> |
| <span class="n">AirflowDagDuplicatedIdException</span><span class="p">,</span> |
| <span class="n">SerializedDagNotFound</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="kn">from</span> <span class="nn">airflow.stats</span> <span class="kn">import</span> <span class="n">Stats</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.dag_cycle_tester</span> <span class="kn">import</span> <span class="n">test_cycle</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.file</span> <span class="kn">import</span> <span class="n">correct_maybe_zipped</span><span class="p">,</span> <span class="n">list_py_file_paths</span><span class="p">,</span> <span class="n">might_contain_dag</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.retries</span> <span class="kn">import</span> <span class="n">MAX_DB_RETRIES</span><span class="p">,</span> <span class="n">run_with_db_retries</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.session</span> <span class="kn">import</span> <span class="n">provide_session</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.timeout</span> <span class="kn">import</span> <span class="n">timeout</span> |
| |
| <span class="k">if</span> <span class="n">TYPE_CHECKING</span><span class="p">:</span> |
| <span class="kn">import</span> <span class="nn">pathlib</span> |
| |
| |
| <div class="viewcode-block" id="FileLoadStat"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.FileLoadStat">[docs]</a><span class="k">class</span> <span class="nc">FileLoadStat</span><span class="p">(</span><span class="n">NamedTuple</span><span class="p">):</span> |
| <span class="sd">"""Information about single file"""</span> |
| |
| <div class="viewcode-block" id="FileLoadStat.file"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.FileLoadStat.file">[docs]</a> <span class="n">file</span><span class="p">:</span> <span class="nb">str</span></div> |
| <div class="viewcode-block" id="FileLoadStat.duration"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.FileLoadStat.duration">[docs]</a> <span class="n">duration</span><span class="p">:</span> <span class="n">timedelta</span></div> |
| <div class="viewcode-block" id="FileLoadStat.dag_num"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.FileLoadStat.dag_num">[docs]</a> <span class="n">dag_num</span><span class="p">:</span> <span class="nb">int</span></div> |
| <div class="viewcode-block" id="FileLoadStat.task_num"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.FileLoadStat.task_num">[docs]</a> <span class="n">task_num</span><span class="p">:</span> <span class="nb">int</span></div> |
| <div class="viewcode-block" id="FileLoadStat.dags"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.FileLoadStat.dags">[docs]</a> <span class="n">dags</span><span class="p">:</span> <span class="nb">str</span></div></div> |
| |
| |
| <div class="viewcode-block" id="DagBag"><a class="viewcode-back" href="../../../_api/airflow/models/index.html#airflow.models.dagbag.DagBag">[docs]</a><span class="k">class</span> <span class="nc">DagBag</span><span class="p">(</span><span class="n">LoggingMixin</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> A dagbag is a collection of dags, parsed out of a folder tree and has high</span> |
| <span class="sd"> level configuration settings, like what database to use as a backend and</span> |
| <span class="sd"> what executor to use to fire off tasks. This makes it easier to run</span> |
| <span class="sd"> distinct environments for say production and development, tests, or for</span> |
| <span class="sd"> different teams or security profiles. What would have been system level</span> |
| <span class="sd"> settings are now dagbag level so that one system can run multiple,</span> |
| <span class="sd"> independent settings sets.</span> |
| |
| <span class="sd"> :param dag_folder: the folder to scan to find DAGs</span> |
| <span class="sd"> :type dag_folder: unicode</span> |
| <span class="sd"> :param include_examples: whether to include the examples that ship</span> |
| <span class="sd"> with airflow or not</span> |
| <span class="sd"> :type include_examples: bool</span> |
| <span class="sd"> :param include_smart_sensor: whether to include the smart sensor native</span> |
| <span class="sd"> DAGs that create the smart sensor operators for whole cluster</span> |
| <span class="sd"> :type include_smart_sensor: bool</span> |
| <span class="sd"> :param read_dags_from_db: Read DAGs from DB if ``True`` is passed.</span> |
| <span class="sd"> If ``False`` DAGs are read from python files.</span> |
| <span class="sd"> :type read_dags_from_db: bool</span> |
| <span class="sd"> :param load_op_links: Should the extra operator link be loaded via plugins when</span> |
| <span class="sd"> de-serializing the DAG? This flag is set to False in Scheduler so that Extra Operator links</span> |
| <span class="sd"> are not loaded to not run User code in Scheduler.</span> |
| <span class="sd"> :type load_op_links: bool</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="DagBag.DAGBAG_IMPORT_TIMEOUT"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.DAGBAG_IMPORT_TIMEOUT">[docs]</a> <span class="n">DAGBAG_IMPORT_TIMEOUT</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getfloat</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'DAGBAG_IMPORT_TIMEOUT'</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="DagBag.SCHEDULER_ZOMBIE_TASK_THRESHOLD"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.SCHEDULER_ZOMBIE_TASK_THRESHOLD">[docs]</a> <span class="n">SCHEDULER_ZOMBIE_TASK_THRESHOLD</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getint</span><span class="p">(</span><span class="s1">'scheduler'</span><span class="p">,</span> <span class="s1">'scheduler_zombie_task_threshold'</span><span class="p">)</span></div> |
| |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">dag_folder</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="s2">"pathlib.Path"</span><span class="p">,</span> <span class="kc">None</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">include_examples</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'LOAD_EXAMPLES'</span><span class="p">),</span> |
| <span class="n">include_smart_sensor</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'smart_sensor'</span><span class="p">,</span> <span class="s1">'USE_SMART_SENSOR'</span><span class="p">),</span> |
| <span class="n">safe_mode</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'DAG_DISCOVERY_SAFE_MODE'</span><span class="p">),</span> |
| <span class="n">read_dags_from_db</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">store_serialized_dags</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="nb">bool</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">load_op_links</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="c1"># Avoid circular import</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> |
| |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| |
| <span class="k">if</span> <span class="n">store_serialized_dags</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="s2">"The store_serialized_dags parameter has been deprecated. "</span> |
| <span class="s2">"You should pass the read_dags_from_db parameter."</span><span class="p">,</span> |
| <span class="ne">DeprecationWarning</span><span class="p">,</span> |
| <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="n">read_dags_from_db</span> <span class="o">=</span> <span class="n">store_serialized_dags</span> |
| |
| <span class="n">dag_folder</span> <span class="o">=</span> <span class="n">dag_folder</span> <span class="ow">or</span> <span class="n">settings</span><span class="o">.</span><span class="n">DAGS_FOLDER</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dag_folder</span> <span class="o">=</span> <span class="n">dag_folder</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">DAG</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="c1"># the file's last modified timestamp when we last read it</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">file_last_changed</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">has_logged</span> <span class="o">=</span> <span class="kc">False</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">read_dags_from_db</span> <span class="o">=</span> <span class="n">read_dags_from_db</span> |
| <span class="c1"># Only used by read_dags_from_db=True</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags_last_fetched</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="n">datetime</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="c1"># Only used by SchedulerJob to compare the dag_hash to identify change in DAGs</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags_hash</span><span class="p">:</span> <span class="n">Dict</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="nb">str</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_tracebacks</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'dagbag_import_error_tracebacks'</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_traceback_depth</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getint</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'dagbag_import_error_traceback_depth'</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">collect_dags</span><span class="p">(</span> |
| <span class="n">dag_folder</span><span class="o">=</span><span class="n">dag_folder</span><span class="p">,</span> |
| <span class="n">include_examples</span><span class="o">=</span><span class="n">include_examples</span><span class="p">,</span> |
| <span class="n">include_smart_sensor</span><span class="o">=</span><span class="n">include_smart_sensor</span><span class="p">,</span> |
| <span class="n">safe_mode</span><span class="o">=</span><span class="n">safe_mode</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="c1"># Should the extra operator link be loaded via plugins?</span> |
| <span class="c1"># This flag is set to False in Scheduler so that Extra Operator links are not loaded</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">load_op_links</span> <span class="o">=</span> <span class="n">load_op_links</span> |
| |
| <div class="viewcode-block" id="DagBag.size"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.size">[docs]</a> <span class="k">def</span> <span class="nf">size</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">int</span><span class="p">:</span> |
| <span class="sd">""":return: the amount of dags contained in this dagbag"""</span> |
| <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">)</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="DagBag.store_serialized_dags"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.store_serialized_dags">[docs]</a> <span class="k">def</span> <span class="nf">store_serialized_dags</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> |
| <span class="sd">"""Whether or not to read dags from DB"""</span> |
| <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> |
| <span class="s2">"The store_serialized_dags property has been deprecated. Use read_dags_from_db instead."</span><span class="p">,</span> |
| <span class="ne">DeprecationWarning</span><span class="p">,</span> |
| <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">read_dags_from_db</span></div> |
| |
| <span class="nd">@property</span> |
| <div class="viewcode-block" id="DagBag.dag_ids"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.dag_ids">[docs]</a> <span class="k">def</span> <span class="nf">dag_ids</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="n">List</span><span class="p">[</span><span class="nb">str</span><span class="p">]:</span> |
| <span class="sd">"""</span> |
| <span class="sd"> :return: a list of DAG IDs in this bag</span> |
| <span class="sd"> :rtype: List[unicode]</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span></div> |
| |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="DagBag.get_dag"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.get_dag">[docs]</a> <span class="k">def</span> <span class="nf">get_dag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dag_id</span><span class="p">,</span> <span class="n">session</span><span class="p">:</span> <span class="n">Session</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Gets the DAG out of the dictionary, and refreshes it if expired</span> |
| |
| <span class="sd"> :param dag_id: DAG Id</span> |
| <span class="sd"> :type dag_id: str</span> |
| <span class="sd"> """</span> |
| <span class="c1"># Avoid circular import</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DagModel</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">read_dags_from_db</span><span class="p">:</span> |
| <span class="c1"># Import here so that serialized dag is only imported when serialization is enabled</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.serialized_dag</span> <span class="kn">import</span> <span class="n">SerializedDagModel</span> |
| |
| <span class="k">if</span> <span class="n">dag_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">:</span> |
| <span class="c1"># Load from DB if not (yet) in the bag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_add_dag_from_db</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">session</span><span class="o">=</span><span class="n">session</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">dag_id</span><span class="p">)</span> |
| |
| <span class="c1"># If DAG is in the DagBag, check the following</span> |
| <span class="c1"># 1. if time has come to check if DAG is updated (controlled by min_serialized_dag_fetch_secs)</span> |
| <span class="c1"># 2. check the last_updated column in SerializedDag table to see if Serialized DAG is updated</span> |
| <span class="c1"># 3. if (2) is yes, fetch the Serialized DAG.</span> |
| <span class="c1"># 4. if (2) returns None (i.e. Serialized DAG is deleted), remove dag from dagbag</span> |
| <span class="c1"># if it exists and return None.</span> |
| <span class="n">min_serialized_dag_fetch_secs</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">seconds</span><span class="o">=</span><span class="n">settings</span><span class="o">.</span><span class="n">MIN_SERIALIZED_DAG_FETCH_INTERVAL</span><span class="p">)</span> |
| <span class="k">if</span> <span class="p">(</span> |
| <span class="n">dag_id</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags_last_fetched</span> |
| <span class="ow">and</span> <span class="n">timezone</span><span class="o">.</span><span class="n">utcnow</span><span class="p">()</span> <span class="o">></span> <span class="bp">self</span><span class="o">.</span><span class="n">dags_last_fetched</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> <span class="o">+</span> <span class="n">min_serialized_dag_fetch_secs</span> |
| <span class="p">):</span> |
| <span class="n">sd_last_updated_datetime</span> <span class="o">=</span> <span class="n">SerializedDagModel</span><span class="o">.</span><span class="n">get_last_updated_datetime</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">session</span><span class="o">=</span><span class="n">session</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">sd_last_updated_datetime</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"Serialized DAG </span><span class="si">%s</span><span class="s2"> no longer exists"</span><span class="p">,</span> <span class="n">dag_id</span><span class="p">)</span> |
| <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags_last_fetched</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags_hash</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| |
| <span class="k">if</span> <span class="n">sd_last_updated_datetime</span> <span class="o">></span> <span class="bp">self</span><span class="o">.</span><span class="n">dags_last_fetched</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_add_dag_from_db</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">session</span><span class="o">=</span><span class="n">session</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">dag_id</span><span class="p">)</span> |
| |
| <span class="c1"># If asking for a known subdag, we want to refresh the parent</span> |
| <span class="n">dag</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="n">root_dag_id</span> <span class="o">=</span> <span class="n">dag_id</span> |
| <span class="k">if</span> <span class="n">dag_id</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">:</span> |
| <span class="n">dag</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">if</span> <span class="n">dag</span><span class="o">.</span><span class="n">is_subdag</span><span class="p">:</span> |
| <span class="n">root_dag_id</span> <span class="o">=</span> <span class="n">dag</span><span class="o">.</span><span class="n">parent_dag</span><span class="o">.</span><span class="n">dag_id</span> <span class="c1"># type: ignore</span> |
| |
| <span class="c1"># If DAG Model is absent, we can't check last_expired property. Is the DAG not yet synchronized?</span> |
| <span class="n">orm_dag</span> <span class="o">=</span> <span class="n">DagModel</span><span class="o">.</span><span class="n">get_current</span><span class="p">(</span><span class="n">root_dag_id</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="k">if</span> <span class="ow">not</span> <span class="n">orm_dag</span><span class="p">:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">dag_id</span><span class="p">)</span> |
| |
| <span class="c1"># If the dag corresponding to root_dag_id is absent or expired</span> |
| <span class="n">is_missing</span> <span class="o">=</span> <span class="n">root_dag_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span> |
| <span class="n">is_expired</span> <span class="o">=</span> <span class="n">orm_dag</span><span class="o">.</span><span class="n">last_expired</span> <span class="ow">and</span> <span class="n">dag</span> <span class="ow">and</span> <span class="n">dag</span><span class="o">.</span><span class="n">last_loaded</span> <span class="o"><</span> <span class="n">orm_dag</span><span class="o">.</span><span class="n">last_expired</span> |
| <span class="k">if</span> <span class="n">is_expired</span><span class="p">:</span> |
| <span class="c1"># Remove associated dags so we can re-add them.</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span> <span class="o">=</span> <span class="p">{</span> |
| <span class="n">key</span><span class="p">:</span> <span class="n">dag</span> |
| <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">dag</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">root_dag_id</span> <span class="o">!=</span> <span class="n">key</span> <span class="ow">and</span> <span class="ow">not</span> <span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">is_subdag</span> <span class="ow">and</span> <span class="n">root_dag_id</span> <span class="o">==</span> <span class="n">dag</span><span class="o">.</span><span class="n">parent_dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="p">}</span> |
| <span class="k">if</span> <span class="n">is_missing</span> <span class="ow">or</span> <span class="n">is_expired</span><span class="p">:</span> |
| <span class="c1"># Reprocess source file.</span> |
| <span class="n">found_dags</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_file</span><span class="p">(</span> |
| <span class="n">filepath</span><span class="o">=</span><span class="n">correct_maybe_zipped</span><span class="p">(</span><span class="n">orm_dag</span><span class="o">.</span><span class="n">fileloc</span><span class="p">),</span> <span class="n">only_if_updated</span><span class="o">=</span><span class="kc">False</span> |
| <span class="p">)</span> |
| |
| <span class="c1"># If the source file no longer exports `dag_id`, delete it from self.dags</span> |
| <span class="k">if</span> <span class="n">found_dags</span> <span class="ow">and</span> <span class="n">dag_id</span> <span class="ow">in</span> <span class="p">[</span><span class="n">found_dag</span><span class="o">.</span><span class="n">dag_id</span> <span class="k">for</span> <span class="n">found_dag</span> <span class="ow">in</span> <span class="n">found_dags</span><span class="p">]:</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">elif</span> <span class="n">dag_id</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">:</span> |
| <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">dag_id</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="DagBag._add_dag_from_db"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag._add_dag_from_db">[docs]</a> <span class="k">def</span> <span class="nf">_add_dag_from_db</span><span class="p">(</span><span class="bp">self</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">session</span><span class="p">:</span> <span class="n">Session</span><span class="p">):</span> |
| <span class="sd">"""Add DAG to DagBag from DB"""</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.serialized_dag</span> <span class="kn">import</span> <span class="n">SerializedDagModel</span> |
| |
| <span class="n">row</span> <span class="o">=</span> <span class="n">SerializedDagModel</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">dag_id</span><span class="p">,</span> <span class="n">session</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">row</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">SerializedDagNotFound</span><span class="p">(</span><span class="sa">f</span><span class="s2">"DAG '</span><span class="si">{</span><span class="n">dag_id</span><span class="si">}</span><span class="s2">' not found in serialized_dag table"</span><span class="p">)</span> |
| |
| <span class="n">row</span><span class="o">.</span><span class="n">load_op_links</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">load_op_links</span> |
| <span class="n">dag</span> <span class="o">=</span> <span class="n">row</span><span class="o">.</span><span class="n">dag</span> |
| <span class="k">for</span> <span class="n">subdag</span> <span class="ow">in</span> <span class="n">dag</span><span class="o">.</span><span class="n">subdags</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">subdag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">subdag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">dag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags_last_fetched</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</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="bp">self</span><span class="o">.</span><span class="n">dags_hash</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">row</span><span class="o">.</span><span class="n">dag_hash</span></div> |
| |
| <div class="viewcode-block" id="DagBag.process_file"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.process_file">[docs]</a> <span class="k">def</span> <span class="nf">process_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filepath</span><span class="p">,</span> <span class="n">only_if_updated</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">safe_mode</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Given a path to a python module or zip file, this method imports</span> |
| <span class="sd"> the module and look for dag objects within it.</span> |
| <span class="sd"> """</span> |
| <span class="c1"># if the source file no longer exists in the DB or in the filesystem,</span> |
| <span class="c1"># return an empty list</span> |
| <span class="c1"># todo: raise exception?</span> |
| <span class="k">if</span> <span class="n">filepath</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isfile</span><span class="p">(</span><span class="n">filepath</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">[]</span> |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="c1"># This failed before in what may have been a git sync</span> |
| <span class="c1"># race condition</span> |
| <span class="n">file_last_changed_on_disk</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">getmtime</span><span class="p">(</span><span class="n">filepath</span><span class="p">))</span> |
| <span class="k">if</span> <span class="p">(</span> |
| <span class="n">only_if_updated</span> |
| <span class="ow">and</span> <span class="n">filepath</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">file_last_changed</span> |
| <span class="ow">and</span> <span class="n">file_last_changed_on_disk</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">file_last_changed</span><span class="p">[</span><span class="n">filepath</span><span class="p">]</span> |
| <span class="p">):</span> |
| <span class="k">return</span> <span class="p">[]</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> |
| <span class="k">return</span> <span class="p">[]</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">zipfile</span><span class="o">.</span><span class="n">is_zipfile</span><span class="p">(</span><span class="n">filepath</span><span class="p">):</span> |
| <span class="n">mods</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_load_modules_from_file</span><span class="p">(</span><span class="n">filepath</span><span class="p">,</span> <span class="n">safe_mode</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">mods</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_load_modules_from_zip</span><span class="p">(</span><span class="n">filepath</span><span class="p">,</span> <span class="n">safe_mode</span><span class="p">)</span> |
| |
| <span class="n">found_dags</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_process_modules</span><span class="p">(</span><span class="n">filepath</span><span class="p">,</span> <span class="n">mods</span><span class="p">,</span> <span class="n">file_last_changed_on_disk</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">file_last_changed</span><span class="p">[</span><span class="n">filepath</span><span class="p">]</span> <span class="o">=</span> <span class="n">file_last_changed_on_disk</span> |
| <span class="k">return</span> <span class="n">found_dags</span></div> |
| |
| <div class="viewcode-block" id="DagBag._load_modules_from_file"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag._load_modules_from_file">[docs]</a> <span class="k">def</span> <span class="nf">_load_modules_from_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filepath</span><span class="p">,</span> <span class="n">safe_mode</span><span class="p">):</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">might_contain_dag</span><span class="p">(</span><span class="n">filepath</span><span class="p">,</span> <span class="n">safe_mode</span><span class="p">):</span> |
| <span class="c1"># Don't want to spam user with skip messages</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_logged</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">has_logged</span> <span class="o">=</span> <span class="kc">True</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"File </span><span class="si">%s</span><span class="s2"> assumed to contain no DAGs. Skipping."</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| <span class="k">return</span> <span class="p">[]</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"Importing </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| <span class="n">org_mod_name</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">splitext</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">filepath</span><span class="p">)[</span><span class="o">-</span><span class="mi">1</span><span class="p">])</span> |
| <span class="n">path_hash</span> <span class="o">=</span> <span class="n">hashlib</span><span class="o">.</span><span class="n">sha1</span><span class="p">(</span><span class="n">filepath</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="o">.</span><span class="n">hexdigest</span><span class="p">()</span> |
| <span class="n">mod_name</span> <span class="o">=</span> <span class="sa">f</span><span class="s1">'unusual_prefix_</span><span class="si">{</span><span class="n">path_hash</span><span class="si">}</span><span class="s1">_</span><span class="si">{</span><span class="n">org_mod_name</span><span class="si">}</span><span class="s1">'</span> |
| |
| <span class="k">if</span> <span class="n">mod_name</span> <span class="ow">in</span> <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">:</span> |
| <span class="k">del</span> <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="n">mod_name</span><span class="p">]</span> |
| |
| <span class="n">timeout_msg</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"DagBag import timeout for </span><span class="si">{</span><span class="n">filepath</span><span class="si">}</span><span class="s2"> after </span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="n">DAGBAG_IMPORT_TIMEOUT</span><span class="si">}</span><span class="s2">s"</span> |
| <span class="k">with</span> <span class="n">timeout</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">DAGBAG_IMPORT_TIMEOUT</span><span class="p">,</span> <span class="n">error_message</span><span class="o">=</span><span class="n">timeout_msg</span><span class="p">):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">loader</span> <span class="o">=</span> <span class="n">importlib</span><span class="o">.</span><span class="n">machinery</span><span class="o">.</span><span class="n">SourceFileLoader</span><span class="p">(</span><span class="n">mod_name</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| <span class="n">spec</span> <span class="o">=</span> <span class="n">importlib</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">spec_from_loader</span><span class="p">(</span><span class="n">mod_name</span><span class="p">,</span> <span class="n">loader</span><span class="p">)</span> |
| <span class="n">new_module</span> <span class="o">=</span> <span class="n">importlib</span><span class="o">.</span><span class="n">util</span><span class="o">.</span><span class="n">module_from_spec</span><span class="p">(</span><span class="n">spec</span><span class="p">)</span> |
| <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="n">spec</span><span class="o">.</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">new_module</span> |
| <span class="n">loader</span><span class="o">.</span><span class="n">exec_module</span><span class="p">(</span><span class="n">new_module</span><span class="p">)</span> |
| <span class="k">return</span> <span class="p">[</span><span class="n">new_module</span><span class="p">]</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="s2">"Failed to import: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_tracebacks</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">[</span><span class="n">filepath</span><span class="p">]</span> <span class="o">=</span> <span class="n">traceback</span><span class="o">.</span><span class="n">format_exc</span><span class="p">(</span> |
| <span class="n">limit</span><span class="o">=-</span><span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_traceback_depth</span> |
| <span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">[</span><span class="n">filepath</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> |
| <span class="k">return</span> <span class="p">[]</span></div> |
| |
| <div class="viewcode-block" id="DagBag._load_modules_from_zip"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag._load_modules_from_zip">[docs]</a> <span class="k">def</span> <span class="nf">_load_modules_from_zip</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filepath</span><span class="p">,</span> <span class="n">safe_mode</span><span class="p">):</span> |
| <span class="n">mods</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="k">with</span> <span class="n">zipfile</span><span class="o">.</span><span class="n">ZipFile</span><span class="p">(</span><span class="n">filepath</span><span class="p">)</span> <span class="k">as</span> <span class="n">current_zip_file</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">zip_info</span> <span class="ow">in</span> <span class="n">current_zip_file</span><span class="o">.</span><span class="n">infolist</span><span class="p">():</span> |
| <span class="n">head</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">zip_info</span><span class="o">.</span><span class="n">filename</span><span class="p">)</span> |
| <span class="n">mod_name</span><span class="p">,</span> <span class="n">ext</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">splitext</span><span class="p">(</span><span class="n">zip_info</span><span class="o">.</span><span class="n">filename</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">ext</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">".py"</span><span class="p">,</span> <span class="s2">".pyc"</span><span class="p">]:</span> |
| <span class="k">continue</span> |
| <span class="k">if</span> <span class="n">head</span><span class="p">:</span> |
| <span class="k">continue</span> |
| |
| <span class="k">if</span> <span class="n">mod_name</span> <span class="o">==</span> <span class="s1">'__init__'</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"Found __init__.</span><span class="si">%s</span><span class="s2"> at root of </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">ext</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"Reading </span><span class="si">%s</span><span class="s2"> from </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">zip_info</span><span class="o">.</span><span class="n">filename</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">might_contain_dag</span><span class="p">(</span><span class="n">zip_info</span><span class="o">.</span><span class="n">filename</span><span class="p">,</span> <span class="n">safe_mode</span><span class="p">,</span> <span class="n">current_zip_file</span><span class="p">):</span> |
| <span class="c1"># todo: create ignore list</span> |
| <span class="c1"># Don't want to spam user with skip messages</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_logged</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">has_logged</span> <span class="o">=</span> <span class="kc">True</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> |
| <span class="s2">"File </span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2"> assumed to contain no DAGs. Skipping."</span><span class="p">,</span> <span class="n">filepath</span><span class="p">,</span> <span class="n">zip_info</span><span class="o">.</span><span class="n">filename</span> |
| <span class="p">)</span> |
| <span class="k">continue</span> |
| |
| <span class="k">if</span> <span class="n">mod_name</span> <span class="ow">in</span> <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">:</span> |
| <span class="k">del</span> <span class="n">sys</span><span class="o">.</span><span class="n">modules</span><span class="p">[</span><span class="n">mod_name</span><span class="p">]</span> |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">sys</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| <span class="n">current_module</span> <span class="o">=</span> <span class="n">importlib</span><span class="o">.</span><span class="n">import_module</span><span class="p">(</span><span class="n">mod_name</span><span class="p">)</span> |
| <span class="n">mods</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">current_module</span><span class="p">)</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="s2">"Failed to import: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">filepath</span><span class="p">)</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_tracebacks</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">[</span><span class="n">filepath</span><span class="p">]</span> <span class="o">=</span> <span class="n">traceback</span><span class="o">.</span><span class="n">format_exc</span><span class="p">(</span> |
| <span class="n">limit</span><span class="o">=-</span><span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_traceback_depth</span> |
| <span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">[</span><span class="n">filepath</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">mods</span></div> |
| |
| <div class="viewcode-block" id="DagBag._process_modules"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag._process_modules">[docs]</a> <span class="k">def</span> <span class="nf">_process_modules</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filepath</span><span class="p">,</span> <span class="n">mods</span><span class="p">,</span> <span class="n">file_last_changed_on_disk</span><span class="p">):</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> <span class="c1"># Avoid circular import</span> |
| |
| <span class="n">is_zipfile</span> <span class="o">=</span> <span class="n">zipfile</span><span class="o">.</span><span class="n">is_zipfile</span><span class="p">(</span><span class="n">filepath</span><span class="p">)</span> |
| <span class="n">top_level_dags</span> <span class="o">=</span> <span class="p">[</span><span class="n">o</span> <span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">mods</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="vm">__dict__</span><span class="o">.</span><span class="n">values</span><span class="p">())</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="n">DAG</span><span class="p">)]</span> |
| |
| <span class="n">found_dags</span> <span class="o">=</span> <span class="p">[]</span> |
| |
| <span class="k">for</span> <span class="n">dag</span> <span class="ow">in</span> <span class="n">top_level_dags</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">:</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span> <span class="o">=</span> <span class="n">filepath</span> |
| <span class="k">if</span> <span class="n">dag</span><span class="o">.</span><span class="n">fileloc</span> <span class="o">!=</span> <span class="n">filepath</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">is_zipfile</span><span class="p">:</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">fileloc</span> <span class="o">=</span> <span class="n">filepath</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">is_subdag</span> <span class="o">=</span> <span class="kc">False</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">normalized_schedule_interval</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> |
| <span class="n">croniter</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">normalized_schedule_interval</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">bag_dag</span><span class="p">(</span><span class="n">dag</span><span class="o">=</span><span class="n">dag</span><span class="p">,</span> <span class="n">root_dag</span><span class="o">=</span><span class="n">dag</span><span class="p">)</span> |
| <span class="n">found_dags</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> |
| <span class="n">found_dags</span> <span class="o">+=</span> <span class="n">dag</span><span class="o">.</span><span class="n">subdags</span> |
| <span class="k">except</span> <span class="p">(</span><span class="n">CroniterBadCronError</span><span class="p">,</span> <span class="n">CroniterBadDateError</span><span class="p">,</span> <span class="n">CroniterNotAlphaError</span><span class="p">)</span> <span class="k">as</span> <span class="n">cron_e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="s2">"Failed to bag_dag: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">]</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"Invalid Cron expression: </span><span class="si">{</span><span class="n">cron_e</span><span class="si">}</span><span class="s2">"</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">file_last_changed</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">]</span> <span class="o">=</span> <span class="n">file_last_changed_on_disk</span> |
| <span class="k">except</span> <span class="p">(</span> |
| <span class="n">AirflowDagCycleException</span><span class="p">,</span> |
| <span class="n">AirflowDagDuplicatedIdException</span><span class="p">,</span> |
| <span class="n">AirflowClusterPolicyViolation</span><span class="p">,</span> |
| <span class="p">)</span> <span class="k">as</span> <span class="n">exception</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="s2">"Failed to bag_dag: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">exception</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">file_last_changed</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">]</span> <span class="o">=</span> <span class="n">file_last_changed_on_disk</span> |
| <span class="k">return</span> <span class="n">found_dags</span></div> |
| |
| <div class="viewcode-block" id="DagBag.bag_dag"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.bag_dag">[docs]</a> <span class="k">def</span> <span class="nf">bag_dag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dag</span><span class="p">,</span> <span class="n">root_dag</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Adds the DAG into the bag, recurses into sub dags.</span> |
| |
| <span class="sd"> :raises: AirflowDagCycleException if a cycle is detected in this dag or its subdags.</span> |
| <span class="sd"> :raises: AirflowDagDuplicatedIdException if this dag or its subdags already exists in the bag.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_bag_dag</span><span class="p">(</span><span class="n">dag</span><span class="o">=</span><span class="n">dag</span><span class="p">,</span> <span class="n">root_dag</span><span class="o">=</span><span class="n">root_dag</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="DagBag._bag_dag"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag._bag_dag">[docs]</a> <span class="k">def</span> <span class="nf">_bag_dag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="p">,</span> <span class="n">dag</span><span class="p">,</span> <span class="n">root_dag</span><span class="p">,</span> <span class="n">recursive</span><span class="p">):</span> |
| <span class="sd">"""Actual implementation of bagging a dag.</span> |
| |
| <span class="sd"> The only purpose of this is to avoid exposing ``recursive`` in ``bag_dag()``,</span> |
| <span class="sd"> intended to only be used by the ``_bag_dag()`` implementation.</span> |
| <span class="sd"> """</span> |
| <span class="n">test_cycle</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> <span class="c1"># throws if a task cycle is found</span> |
| |
| <span class="n">dag</span><span class="o">.</span><span class="n">resolve_template_files</span><span class="p">()</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">last_loaded</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="c1"># Check policies</span> |
| <span class="n">settings</span><span class="o">.</span><span class="n">dag_policy</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> |
| |
| <span class="k">for</span> <span class="n">task</span> <span class="ow">in</span> <span class="n">dag</span><span class="o">.</span><span class="n">tasks</span><span class="p">:</span> |
| <span class="n">settings</span><span class="o">.</span><span class="n">task_policy</span><span class="p">(</span><span class="n">task</span><span class="p">)</span> |
| |
| <span class="n">subdags</span> <span class="o">=</span> <span class="n">dag</span><span class="o">.</span><span class="n">subdags</span> |
| |
| <span class="k">try</span><span class="p">:</span> |
| <span class="c1"># DAG.subdags automatically performs DFS search, so we don't recurse</span> |
| <span class="c1"># into further _bag_dag() calls.</span> |
| <span class="k">if</span> <span class="n">recursive</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">subdag</span> <span class="ow">in</span> <span class="n">subdags</span><span class="p">:</span> |
| <span class="n">subdag</span><span class="o">.</span><span class="n">full_filepath</span> <span class="o">=</span> <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span> |
| <span class="n">subdag</span><span class="o">.</span><span class="n">parent_dag</span> <span class="o">=</span> <span class="n">dag</span> |
| <span class="n">subdag</span><span class="o">.</span><span class="n">is_subdag</span> <span class="o">=</span> <span class="kc">True</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_bag_dag</span><span class="p">(</span><span class="n">dag</span><span class="o">=</span><span class="n">subdag</span><span class="p">,</span> <span class="n">root_dag</span><span class="o">=</span><span class="n">root_dag</span><span class="p">,</span> <span class="n">recursive</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> |
| |
| <span class="n">prev_dag</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">prev_dag</span> <span class="ow">and</span> <span class="n">prev_dag</span><span class="o">.</span><span class="n">full_filepath</span> <span class="o">!=</span> <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="n">AirflowDagDuplicatedIdException</span><span class="p">(</span> |
| <span class="n">dag_id</span><span class="o">=</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">,</span> |
| <span class="n">incoming</span><span class="o">=</span><span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">,</span> |
| <span class="n">existing</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">dag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'Loaded DAG </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">dag</span><span class="p">)</span> |
| <span class="k">except</span> <span class="p">(</span><span class="n">AirflowDagCycleException</span><span class="p">,</span> <span class="n">AirflowDagDuplicatedIdException</span><span class="p">):</span> |
| <span class="c1"># There was an error in bagging the dag. Remove it from the list of dags</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="s1">'Exception bagging dag: </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="c1"># Only necessary at the root level since DAG.subdags automatically</span> |
| <span class="c1"># performs DFS to search through all subdags</span> |
| <span class="k">if</span> <span class="n">recursive</span><span class="p">:</span> |
| <span class="k">for</span> <span class="n">subdag</span> <span class="ow">in</span> <span class="n">subdags</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">subdag</span><span class="o">.</span><span class="n">dag_id</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">:</span> |
| <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="p">[</span><span class="n">subdag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span> |
| <span class="k">raise</span></div> |
| |
| <div class="viewcode-block" id="DagBag.collect_dags"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.collect_dags">[docs]</a> <span class="k">def</span> <span class="nf">collect_dags</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">dag_folder</span><span class="p">:</span> <span class="n">Union</span><span class="p">[</span><span class="nb">str</span><span class="p">,</span> <span class="s2">"pathlib.Path"</span><span class="p">,</span> <span class="kc">None</span><span class="p">]</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span> |
| <span class="n">only_if_updated</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="kc">True</span><span class="p">,</span> |
| <span class="n">include_examples</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'LOAD_EXAMPLES'</span><span class="p">),</span> |
| <span class="n">include_smart_sensor</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'smart_sensor'</span><span class="p">,</span> <span class="s1">'USE_SMART_SENSOR'</span><span class="p">),</span> |
| <span class="n">safe_mode</span><span class="p">:</span> <span class="nb">bool</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'DAG_DISCOVERY_SAFE_MODE'</span><span class="p">),</span> |
| <span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Given a file path or a folder, this method looks for python modules,</span> |
| <span class="sd"> imports them and adds them to the dagbag collection.</span> |
| |
| <span class="sd"> Note that if a ``.airflowignore`` file is found while processing</span> |
| <span class="sd"> the directory, it will behave much like a ``.gitignore``,</span> |
| <span class="sd"> ignoring files that match any of the regex patterns specified</span> |
| <span class="sd"> in the file.</span> |
| |
| <span class="sd"> **Note**: The patterns in .airflowignore are treated as</span> |
| <span class="sd"> un-anchored regexes, not shell-like glob patterns.</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">read_dags_from_db</span><span class="p">:</span> |
| <span class="k">return</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Filling up the DagBag from </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">dag_folder</span><span class="p">)</span> |
| <span class="n">dag_folder</span> <span class="o">=</span> <span class="n">dag_folder</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag_folder</span> |
| <span class="c1"># Used to store stats around DagBag processing</span> |
| <span class="n">stats</span> <span class="o">=</span> <span class="p">[]</span> |
| |
| <span class="c1"># Ensure dag_folder is a str -- it may have been a pathlib.Path</span> |
| <span class="n">dag_folder</span> <span class="o">=</span> <span class="n">correct_maybe_zipped</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="n">dag_folder</span><span class="p">))</span> |
| <span class="k">for</span> <span class="n">filepath</span> <span class="ow">in</span> <span class="n">list_py_file_paths</span><span class="p">(</span> |
| <span class="n">dag_folder</span><span class="p">,</span> |
| <span class="n">safe_mode</span><span class="o">=</span><span class="n">safe_mode</span><span class="p">,</span> |
| <span class="n">include_examples</span><span class="o">=</span><span class="n">include_examples</span><span class="p">,</span> |
| <span class="n">include_smart_sensor</span><span class="o">=</span><span class="n">include_smart_sensor</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">file_parse_start_dttm</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">found_dags</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_file</span><span class="p">(</span><span class="n">filepath</span><span class="p">,</span> <span class="n">only_if_updated</span><span class="o">=</span><span class="n">only_if_updated</span><span class="p">,</span> <span class="n">safe_mode</span><span class="o">=</span><span class="n">safe_mode</span><span class="p">)</span> |
| |
| <span class="n">file_parse_end_dttm</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">stats</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> |
| <span class="n">FileLoadStat</span><span class="p">(</span> |
| <span class="n">file</span><span class="o">=</span><span class="n">filepath</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">settings</span><span class="o">.</span><span class="n">DAGS_FOLDER</span><span class="p">,</span> <span class="s1">''</span><span class="p">),</span> |
| <span class="n">duration</span><span class="o">=</span><span class="n">file_parse_end_dttm</span> <span class="o">-</span> <span class="n">file_parse_start_dttm</span><span class="p">,</span> |
| <span class="n">dag_num</span><span class="o">=</span><span class="nb">len</span><span class="p">(</span><span class="n">found_dags</span><span class="p">),</span> |
| <span class="n">task_num</span><span class="o">=</span><span class="nb">sum</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">tasks</span><span class="p">)</span> <span class="k">for</span> <span class="n">dag</span> <span class="ow">in</span> <span class="n">found_dags</span><span class="p">),</span> |
| <span class="n">dags</span><span class="o">=</span><span class="nb">str</span><span class="p">([</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span> <span class="k">for</span> <span class="n">dag</span> <span class="ow">in</span> <span class="n">found_dags</span><span class="p">]),</span> |
| <span class="p">)</span> |
| <span class="p">)</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="n">e</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">dagbag_stats</span> <span class="o">=</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">stats</span><span class="p">,</span> <span class="n">key</span><span class="o">=</span><span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">x</span><span class="o">.</span><span class="n">duration</span><span class="p">,</span> <span class="n">reverse</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="DagBag.collect_dags_from_db"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.collect_dags_from_db">[docs]</a> <span class="k">def</span> <span class="nf">collect_dags_from_db</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Collects DAGs from database."""</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.serialized_dag</span> <span class="kn">import</span> <span class="n">SerializedDagModel</span> |
| |
| <span class="k">with</span> <span class="n">Stats</span><span class="o">.</span><span class="n">timer</span><span class="p">(</span><span class="s1">'collect_db_dags'</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Filling up the DagBag from database"</span><span class="p">)</span> |
| |
| <span class="c1"># The dagbag contains all rows in serialized_dag table. Deleted DAGs are deleted</span> |
| <span class="c1"># from the table by the scheduler job.</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span> <span class="o">=</span> <span class="n">SerializedDagModel</span><span class="o">.</span><span class="n">read_all_dags</span><span class="p">()</span> |
| |
| <span class="c1"># Adds subdags.</span> |
| <span class="c1"># DAG post-processing steps such as self.bag_dag and croniter are not needed as</span> |
| <span class="c1"># they are done by scheduler before serialization.</span> |
| <span class="n">subdags</span> <span class="o">=</span> <span class="p">{}</span> |
| <span class="k">for</span> <span class="n">dag</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> |
| <span class="k">for</span> <span class="n">subdag</span> <span class="ow">in</span> <span class="n">dag</span><span class="o">.</span><span class="n">subdags</span><span class="p">:</span> |
| <span class="n">subdags</span><span class="p">[</span><span class="n">subdag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">subdag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">subdags</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="DagBag.dagbag_report"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.dagbag_report">[docs]</a> <span class="k">def</span> <span class="nf">dagbag_report</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="sd">"""Prints a report around DagBag loading stats"""</span> |
| <span class="n">stats</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dagbag_stats</span> |
| <span class="n">dag_folder</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag_folder</span> |
| <span class="n">duration</span> <span class="o">=</span> <span class="nb">sum</span><span class="p">((</span><span class="n">o</span><span class="o">.</span><span class="n">duration</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">stats</span><span class="p">),</span> <span class="n">timedelta</span><span class="p">())</span><span class="o">.</span><span class="n">total_seconds</span><span class="p">()</span> |
| <span class="n">dag_num</span> <span class="o">=</span> <span class="nb">sum</span><span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">dag_num</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">stats</span><span class="p">)</span> |
| <span class="n">task_num</span> <span class="o">=</span> <span class="nb">sum</span><span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">task_num</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">stats</span><span class="p">)</span> |
| <span class="n">table</span> <span class="o">=</span> <span class="n">tabulate</span><span class="p">(</span><span class="n">stats</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="s2">"keys"</span><span class="p">)</span> |
| |
| <span class="n">report</span> <span class="o">=</span> <span class="n">textwrap</span><span class="o">.</span><span class="n">dedent</span><span class="p">(</span> |
| <span class="sa">f</span><span class="s2">"""</span><span class="se">\n</span><span class="s2"></span> |
| <span class="s2"> -------------------------------------------------------------------</span> |
| <span class="s2"> DagBag loading stats for </span><span class="si">{</span><span class="n">dag_folder</span><span class="si">}</span><span class="s2"></span> |
| <span class="s2"> -------------------------------------------------------------------</span> |
| <span class="s2"> Number of DAGs: </span><span class="si">{</span><span class="n">dag_num</span><span class="si">}</span><span class="s2"></span> |
| <span class="s2"> Total task number: </span><span class="si">{</span><span class="n">task_num</span><span class="si">}</span><span class="s2"></span> |
| <span class="s2"> DagBag parsing time: </span><span class="si">{</span><span class="n">duration</span><span class="si">}</span><span class="s2"></span> |
| <span class="s2"> </span><span class="si">{</span><span class="n">table</span><span class="si">}</span><span class="s2"></span> |
| <span class="s2"> """</span> |
| <span class="p">)</span> |
| <span class="k">return</span> <span class="n">report</span></div> |
| |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="DagBag.sync_to_db"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag.sync_to_db">[docs]</a> <span class="k">def</span> <span class="nf">sync_to_db</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">session</span><span class="p">:</span> <span class="n">Optional</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">"""Save attributes about list of DAG to the DB."""</span> |
| <span class="c1"># To avoid circular import - airflow.models.dagbag -> airflow.models.dag -> airflow.models.dagbag</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.dag</span> <span class="kn">import</span> <span class="n">DAG</span> |
| <span class="kn">from</span> <span class="nn">airflow.models.serialized_dag</span> <span class="kn">import</span> <span class="n">SerializedDagModel</span> |
| |
| <span class="k">def</span> <span class="nf">_serialize_dag_capturing_errors</span><span class="p">(</span><span class="n">dag</span><span class="p">,</span> <span class="n">session</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Try to serialize the dag to the DB, but make a note of any errors.</span> |
| |
| <span class="sd"> We can't place them directly in import_errors, as this may be retried, and work the next time</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="n">dag</span><span class="o">.</span><span class="n">is_subdag</span><span class="p">:</span> |
| <span class="k">return</span> <span class="p">[]</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="c1"># We can't use bulk_write_to_db as we want to capture each error individually</span> |
| <span class="n">dag_was_updated</span> <span class="o">=</span> <span class="n">SerializedDagModel</span><span class="o">.</span><span class="n">write_dag</span><span class="p">(</span> |
| <span class="n">dag</span><span class="p">,</span> |
| <span class="n">min_update_interval</span><span class="o">=</span><span class="n">settings</span><span class="o">.</span><span class="n">MIN_SERIALIZED_DAG_UPDATE_INTERVAL</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">if</span> <span class="n">dag_was_updated</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">_sync_perm_for_dag</span><span class="p">(</span><span class="n">dag</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="k">return</span> <span class="p">[]</span> |
| <span class="k">except</span> <span class="n">OperationalError</span><span class="p">:</span> |
| <span class="k">raise</span> |
| <span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">exception</span><span class="p">(</span><span class="s2">"Failed to write serialized DAG: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">dag</span><span class="o">.</span><span class="n">full_filepath</span><span class="p">)</span> |
| <span class="k">return</span> <span class="p">[(</span><span class="n">dag</span><span class="o">.</span><span class="n">fileloc</span><span class="p">,</span> <span class="n">traceback</span><span class="o">.</span><span class="n">format_exc</span><span class="p">(</span><span class="n">limit</span><span class="o">=-</span><span class="bp">self</span><span class="o">.</span><span class="n">dagbag_import_error_traceback_depth</span><span class="p">))]</span> |
| |
| <span class="c1"># Retry 'DAG.bulk_write_to_db' & 'SerializedDagModel.bulk_sync_to_db' in case</span> |
| <span class="c1"># of any Operational Errors</span> |
| <span class="c1"># In case of failures, provide_session handles rollback</span> |
| <span class="k">for</span> <span class="n">attempt</span> <span class="ow">in</span> <span class="n">run_with_db_retries</span><span class="p">(</span><span class="n">logger</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="p">):</span> |
| <span class="k">with</span> <span class="n">attempt</span><span class="p">:</span> |
| <span class="n">serialize_errors</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span> |
| <span class="s2">"Running dagbag.sync_to_db with retries. Try </span><span class="si">%d</span><span class="s2"> of </span><span class="si">%d</span><span class="s2">"</span><span class="p">,</span> |
| <span class="n">attempt</span><span class="o">.</span><span class="n">retry_state</span><span class="o">.</span><span class="n">attempt_number</span><span class="p">,</span> |
| <span class="n">MAX_DB_RETRIES</span><span class="p">,</span> |
| <span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"Calling the DAG.bulk_sync_to_db method"</span><span class="p">)</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="c1"># Write Serialized DAGs to DB, capturing errors</span> |
| <span class="k">for</span> <span class="n">dag</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">values</span><span class="p">():</span> |
| <span class="n">serialize_errors</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">_serialize_dag_capturing_errors</span><span class="p">(</span><span class="n">dag</span><span class="p">,</span> <span class="n">session</span><span class="p">))</span> |
| |
| <span class="n">DAG</span><span class="o">.</span><span class="n">bulk_write_to_db</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dags</span><span class="o">.</span><span class="n">values</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="k">except</span> <span class="n">OperationalError</span><span class="p">:</span> |
| <span class="n">session</span><span class="o">.</span><span class="n">rollback</span><span class="p">()</span> |
| <span class="k">raise</span> |
| <span class="c1"># Only now we are "complete" do we update import_errors - don't want to record errors from</span> |
| <span class="c1"># previous failed attempts</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">import_errors</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="nb">dict</span><span class="p">(</span><span class="n">serialize_errors</span><span class="p">))</span></div> |
| |
| <span class="nd">@provide_session</span> |
| <div class="viewcode-block" id="DagBag._sync_perm_for_dag"><a class="viewcode-back" href="../../../_api/airflow/models/dagbag/index.html#airflow.models.dagbag.DagBag._sync_perm_for_dag">[docs]</a> <span class="k">def</span> <span class="nf">_sync_perm_for_dag</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dag</span><span class="p">,</span> <span class="n">session</span><span class="p">:</span> <span class="n">Optional</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">"""Sync DAG specific permissions, if necessary"""</span> |
| <span class="kn">from</span> <span class="nn">flask_appbuilder.security.sqla</span> <span class="kn">import</span> <span class="n">models</span> <span class="k">as</span> <span class="n">sqla_models</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.security.permissions</span> <span class="kn">import</span> <span class="n">DAG_PERMS</span><span class="p">,</span> <span class="n">resource_name_for_dag</span> |
| |
| <span class="k">def</span> <span class="nf">needs_perm_views</span><span class="p">(</span><span class="n">dag_id</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> |
| <span class="n">dag_resource_name</span> <span class="o">=</span> <span class="n">resource_name_for_dag</span><span class="p">(</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">permission_name</span> <span class="ow">in</span> <span class="n">DAG_PERMS</span><span class="p">:</span> |
| <span class="k">if</span> <span class="ow">not</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">sqla_models</span><span class="o">.</span><span class="n">PermissionView</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">sqla_models</span><span class="o">.</span><span class="n">Permission</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">sqla_models</span><span class="o">.</span><span class="n">ViewMenu</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">sqla_models</span><span class="o">.</span><span class="n">Permission</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="n">permission_name</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="n">sqla_models</span><span class="o">.</span><span class="n">ViewMenu</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="n">dag_resource_name</span><span class="p">)</span> |
| <span class="o">.</span><span class="n">one_or_none</span><span class="p">()</span> |
| <span class="p">):</span> |
| <span class="k">return</span> <span class="kc">True</span> |
| <span class="k">return</span> <span class="kc">False</span> |
| |
| <span class="k">if</span> <span class="n">dag</span><span class="o">.</span><span class="n">access_control</span> <span class="ow">or</span> <span class="n">needs_perm_views</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s2">"Syncing DAG permissions: </span><span class="si">%s</span><span class="s2"> to the DB"</span><span class="p">,</span> <span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">)</span> |
| <span class="kn">from</span> <span class="nn">airflow.www.security</span> <span class="kn">import</span> <span class="n">ApplessAirflowSecurityManager</span> |
| |
| <span class="n">security_manager</span> <span class="o">=</span> <span class="n">ApplessAirflowSecurityManager</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="n">security_manager</span><span class="o">.</span><span class="n">sync_perm_for_dag</span><span class="p">(</span><span class="n">dag</span><span class="o">.</span><span class="n">dag_id</span><span class="p">,</span> <span class="n">dag</span><span class="o">.</span><span class="n">access_control</span><span class="p">)</span></div></div> |
| </pre></div> |
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