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| <h1>Source code for airflow.models.dagpickle</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># -*- coding: utf-8 -*-</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">dill</span> |
| <span class="kn">from</span> <span class="nn">sqlalchemy</span> <span class="k">import</span> <span class="n">Column</span><span class="p">,</span> <span class="n">Integer</span><span class="p">,</span> <span class="n">PickleType</span><span class="p">,</span> <span class="n">Text</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.models.base</span> <span class="k">import</span> <span class="n">Base</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils</span> <span class="k">import</span> <span class="n">timezone</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.sqlalchemy</span> <span class="k">import</span> <span class="n">UtcDateTime</span> |
| |
| |
| <div class="viewcode-block" id="DagPickle"><a class="viewcode-back" href="../../../_api/airflow/models/index.html#airflow.models.dagpickle.DagPickle">[docs]</a><span class="k">class</span> <span class="nc">DagPickle</span><span class="p">(</span><span class="n">Base</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Dags can originate from different places (user repos, master repo, ...)</span> |
| <span class="sd"> and also get executed in different places (different executors). This</span> |
| <span class="sd"> object represents a version of a DAG and becomes a source of truth for</span> |
| <span class="sd"> a BackfillJob execution. A pickle is a native python serialized object,</span> |
| <span class="sd"> and in this case gets stored in the database for the duration of the job.</span> |
| |
| <span class="sd"> The executors pick up the DagPickle id and read the dag definition from</span> |
| <span class="sd"> the database.</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="DagPickle.id"><a class="viewcode-back" href="../../../_api/airflow/models/dagpickle/index.html#airflow.models.dagpickle.DagPickle.id">[docs]</a> <span class="nb">id</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">Integer</span><span class="p">,</span> <span class="n">primary_key</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="DagPickle.pickle"><a class="viewcode-back" href="../../../_api/airflow/models/dagpickle/index.html#airflow.models.dagpickle.DagPickle.pickle">[docs]</a> <span class="n">pickle</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">PickleType</span><span class="p">(</span><span class="n">pickler</span><span class="o">=</span><span class="n">dill</span><span class="p">))</span></div> |
| <div class="viewcode-block" id="DagPickle.created_dttm"><a class="viewcode-back" href="../../../_api/airflow/models/dagpickle/index.html#airflow.models.dagpickle.DagPickle.created_dttm">[docs]</a> <span class="n">created_dttm</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">UtcDateTime</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">timezone</span><span class="o">.</span><span class="n">utcnow</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="DagPickle.pickle_hash"><a class="viewcode-back" href="../../../_api/airflow/models/dagpickle/index.html#airflow.models.dagpickle.DagPickle.pickle_hash">[docs]</a> <span class="n">pickle_hash</span> <span class="o">=</span> <span class="n">Column</span><span class="p">(</span><span class="n">Text</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="DagPickle.__tablename__"><a class="viewcode-back" href="../../../_api/airflow/models/dagpickle/index.html#airflow.models.dagpickle.DagPickle.__tablename__">[docs]</a> <span class="n">__tablename__</span> <span class="o">=</span> <span class="s2">"dag_pickle"</span></div> |
| |
| <span class="k">def</span> <span class="nf">__init__</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="bp">self</span><span class="o">.</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="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">dag</span><span class="p">,</span> <span class="s1">'template_env'</span><span class="p">):</span> |
| <span class="n">dag</span><span class="o">.</span><span class="n">template_env</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pickle_hash</span> <span class="o">=</span> <span class="nb">hash</span><span class="p">(</span><span class="n">dag</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pickle</span> <span class="o">=</span> <span class="n">dag</span></div> |
| </pre></div> |
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