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<h1>Source code for airflow.executors</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"># &quot;License&quot;); 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"># &quot;AS IS&quot; 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">sys</span>
<span class="kn">from</span> <span class="nn">airflow.utils.log.logging_mixin</span> <span class="k">import</span> <span class="n">LoggingMixin</span>
<span class="kn">from</span> <span class="nn">airflow</span> <span class="k">import</span> <span class="n">configuration</span>
<span class="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="k">import</span> <span class="n">AirflowException</span>
<span class="kn">from</span> <span class="nn">airflow.executors.base_executor</span> <span class="k">import</span> <span class="n">BaseExecutor</span> <span class="c1"># noqa</span>
<span class="kn">from</span> <span class="nn">airflow.executors.local_executor</span> <span class="k">import</span> <span class="n">LocalExecutor</span>
<span class="kn">from</span> <span class="nn">airflow.executors.sequential_executor</span> <span class="k">import</span> <span class="n">SequentialExecutor</span>
<div class="viewcode-block" id="DEFAULT_EXECUTOR"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.DEFAULT_EXECUTOR">[docs]</a><span class="n">DEFAULT_EXECUTOR</span> <span class="o">=</span> <span class="kc">None</span></div>
<div class="viewcode-block" id="_integrate_plugins"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors._integrate_plugins">[docs]</a><span class="k">def</span> <span class="nf">_integrate_plugins</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Integrate plugins to the context.&quot;&quot;&quot;</span>
<span class="kn">from</span> <span class="nn">airflow.plugins_manager</span> <span class="k">import</span> <span class="n">executors_modules</span>
<span class="k">for</span> <span class="n">executors_module</span> <span class="ow">in</span> <span class="n">executors_modules</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">executors_module</span><span class="o">.</span><span class="vm">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">executors_module</span>
<span class="nb">globals</span><span class="p">()[</span><span class="n">executors_module</span><span class="o">.</span><span class="n">_name</span><span class="p">]</span> <span class="o">=</span> <span class="n">executors_module</span></div>
<div class="viewcode-block" id="GetDefaultExecutor"><a class="viewcode-back" href="../../_api/airflow/models/index.html#airflow.executors.GetDefaultExecutor">[docs]</a><span class="k">def</span> <span class="nf">GetDefaultExecutor</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Creates a new instance of the configured executor if none exists and returns it&quot;&quot;&quot;</span>
<span class="k">global</span> <span class="n">DEFAULT_EXECUTOR</span>
<span class="k">if</span> <span class="n">DEFAULT_EXECUTOR</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="n">DEFAULT_EXECUTOR</span>
<span class="n">executor_name</span> <span class="o">=</span> <span class="n">configuration</span><span class="o">.</span><span class="n">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;core&#39;</span><span class="p">,</span> <span class="s1">&#39;EXECUTOR&#39;</span><span class="p">)</span>
<span class="n">DEFAULT_EXECUTOR</span> <span class="o">=</span> <span class="n">_get_executor</span><span class="p">(</span><span class="n">executor_name</span><span class="p">)</span>
<span class="n">log</span> <span class="o">=</span> <span class="n">LoggingMixin</span><span class="p">()</span><span class="o">.</span><span class="n">log</span>
<span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;Using executor </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">executor_name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">DEFAULT_EXECUTOR</span></div>
<div class="viewcode-block" id="Executors"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors">[docs]</a><span class="k">class</span> <span class="nc">Executors</span><span class="p">:</span>
<div class="viewcode-block" id="Executors.LocalExecutor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors.LocalExecutor">[docs]</a> <span class="n">LocalExecutor</span> <span class="o">=</span> <span class="s2">&quot;LocalExecutor&quot;</span></div>
<div class="viewcode-block" id="Executors.SequentialExecutor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors.SequentialExecutor">[docs]</a> <span class="n">SequentialExecutor</span> <span class="o">=</span> <span class="s2">&quot;SequentialExecutor&quot;</span></div>
<div class="viewcode-block" id="Executors.CeleryExecutor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors.CeleryExecutor">[docs]</a> <span class="n">CeleryExecutor</span> <span class="o">=</span> <span class="s2">&quot;CeleryExecutor&quot;</span></div>
<div class="viewcode-block" id="Executors.DaskExecutor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors.DaskExecutor">[docs]</a> <span class="n">DaskExecutor</span> <span class="o">=</span> <span class="s2">&quot;DaskExecutor&quot;</span></div>
<div class="viewcode-block" id="Executors.MesosExecutor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors.MesosExecutor">[docs]</a> <span class="n">MesosExecutor</span> <span class="o">=</span> <span class="s2">&quot;MesosExecutor&quot;</span></div>
<div class="viewcode-block" id="Executors.KubernetesExecutor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors.Executors.KubernetesExecutor">[docs]</a> <span class="n">KubernetesExecutor</span> <span class="o">=</span> <span class="s2">&quot;KubernetesExecutor&quot;</span></div></div>
<div class="viewcode-block" id="_get_executor"><a class="viewcode-back" href="../../_api/airflow/executors/index.html#airflow.executors._get_executor">[docs]</a><span class="k">def</span> <span class="nf">_get_executor</span><span class="p">(</span><span class="n">executor_name</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Creates a new instance of the named executor.</span>
<span class="sd"> In case the executor name is not know in airflow,</span>
<span class="sd"> look for it in the plugins</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">if</span> <span class="n">executor_name</span> <span class="o">==</span> <span class="n">Executors</span><span class="o">.</span><span class="n">LocalExecutor</span><span class="p">:</span>
<span class="k">return</span> <span class="n">LocalExecutor</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">executor_name</span> <span class="o">==</span> <span class="n">Executors</span><span class="o">.</span><span class="n">SequentialExecutor</span><span class="p">:</span>
<span class="k">return</span> <span class="n">SequentialExecutor</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">executor_name</span> <span class="o">==</span> <span class="n">Executors</span><span class="o">.</span><span class="n">CeleryExecutor</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">airflow.executors.celery_executor</span> <span class="k">import</span> <span class="n">CeleryExecutor</span>
<span class="k">return</span> <span class="n">CeleryExecutor</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">executor_name</span> <span class="o">==</span> <span class="n">Executors</span><span class="o">.</span><span class="n">DaskExecutor</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">airflow.executors.dask_executor</span> <span class="k">import</span> <span class="n">DaskExecutor</span>
<span class="k">return</span> <span class="n">DaskExecutor</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">executor_name</span> <span class="o">==</span> <span class="n">Executors</span><span class="o">.</span><span class="n">MesosExecutor</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">airflow.contrib.executors.mesos_executor</span> <span class="k">import</span> <span class="n">MesosExecutor</span>
<span class="k">return</span> <span class="n">MesosExecutor</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">executor_name</span> <span class="o">==</span> <span class="n">Executors</span><span class="o">.</span><span class="n">KubernetesExecutor</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">airflow.contrib.executors.kubernetes_executor</span> <span class="k">import</span> <span class="n">KubernetesExecutor</span>
<span class="k">return</span> <span class="n">KubernetesExecutor</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># Loading plugins</span>
<span class="n">_integrate_plugins</span><span class="p">()</span>
<span class="n">executor_path</span> <span class="o">=</span> <span class="n">executor_name</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;.&#39;</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">executor_path</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">2</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span>
<span class="s2">&quot;Executor </span><span class="si">{0}</span><span class="s2"> not supported: &quot;</span>
<span class="s2">&quot;please specify in format plugin_module.executor&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">executor_name</span><span class="p">))</span>
<span class="k">if</span> <span class="n">executor_path</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="ow">in</span> <span class="nb">globals</span><span class="p">():</span>
<span class="k">return</span> <span class="nb">globals</span><span class="p">()[</span><span class="n">executor_path</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">[</span><span class="n">executor_path</span><span class="p">[</span><span class="mi">1</span><span class="p">]]()</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s2">&quot;Executor </span><span class="si">{0}</span><span class="s2"> not supported.&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">executor_name</span><span class="p">))</span></div>
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