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<h1>Source code for airflow.executors.debug_executor</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="sd">&quot;&quot;&quot;</span>
<span class="sd">This module contains DebugExecutor that is a single</span>
<span class="sd">process executor meaning it does not use multiprocessing.</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">threading</span>
<span class="kn">from</span> <span class="nn">airflow</span> <span class="kn">import</span> <span class="n">conf</span>
<span class="kn">from</span> <span class="nn">airflow.executors.base_executor</span> <span class="kn">import</span> <span class="n">BaseExecutor</span>
<span class="kn">from</span> <span class="nn">airflow.utils.state</span> <span class="kn">import</span> <span class="n">State</span>
<div class="viewcode-block" id="DebugExecutor"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor">[docs]</a><span class="k">class</span> <span class="nc">DebugExecutor</span><span class="p">(</span><span class="n">BaseExecutor</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> This executor is meant for debugging purposes. It can be used with SQLite.</span>
<span class="sd"> It executes one task instance at time. Additionally to support working</span>
<span class="sd"> with sensors, all sensors ``mode`` will be automatically set to &quot;reschedule&quot;.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="DebugExecutor._terminated"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor._terminated">[docs]</a> <span class="n">_terminated</span> <span class="o">=</span> <span class="n">threading</span><span class="o">.</span><span class="n">Event</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="nb">super</span><span class="p">(</span><span class="n">DebugExecutor</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tasks_to_run</span> <span class="o">=</span> <span class="p">[]</span>
<span class="c1"># Place where we keep information for task instance raw run</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tasks_params</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fail_fast</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="s2">&quot;debug&quot;</span><span class="p">,</span> <span class="s2">&quot;fail_fast&quot;</span><span class="p">)</span>
<div class="viewcode-block" id="DebugExecutor.execute_async"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.execute_async">[docs]</a> <span class="k">def</span> <span class="nf">execute_async</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span></div>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> The method is replaced by custom trigger_task implementation.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="DebugExecutor.sync"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.sync">[docs]</a> <span class="k">def</span> <span class="nf">sync</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">task_succeeded</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks_to_run</span><span class="p">:</span>
<span class="n">ti</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks_to_run</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">fail_fast</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">task_succeeded</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">&quot;Setting </span><span class="si">%s</span><span class="s2"> to </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">UPSTREAM_FAILED</span><span class="p">)</span>
<span class="n">ti</span><span class="o">.</span><span class="n">set_state</span><span class="p">(</span><span class="n">State</span><span class="o">.</span><span class="n">UPSTREAM_FAILED</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">UPSTREAM_FAILED</span><span class="p">)</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_terminated</span><span class="o">.</span><span class="n">is_set</span><span class="p">():</span>
<span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span>
<span class="s2">&quot;Executor is terminated! Stopping </span><span class="si">%s</span><span class="s2"> to </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</span>
<span class="p">)</span>
<span class="n">ti</span><span class="o">.</span><span class="n">set_state</span><span class="p">(</span><span class="n">State</span><span class="o">.</span><span class="n">FAILED</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</span><span class="p">)</span>
<span class="k">continue</span>
<span class="n">task_succeeded</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_run_task</span><span class="p">(</span><span class="n">ti</span><span class="p">)</span></div>
<div class="viewcode-block" id="DebugExecutor._run_task"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor._run_task">[docs]</a> <span class="k">def</span> <span class="nf">_run_task</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">ti</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">&quot;Executing task: </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">ti</span><span class="p">)</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">ti</span><span class="o">.</span><span class="n">key</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">params</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks_params</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="p">{})</span>
<span class="n">ti</span><span class="o">.</span><span class="n">_run_raw_task</span><span class="p">(</span> <span class="c1"># pylint: disable=protected-access</span>
<span class="n">job_id</span><span class="o">=</span><span class="n">ti</span><span class="o">.</span><span class="n">job_id</span><span class="p">,</span> <span class="o">**</span><span class="n">params</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">SUCCESS</span><span class="p">)</span>
<span class="k">return</span> <span class="kc">True</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="c1"># pylint: disable=broad-except</span>
<span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</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">&quot;Failed to execute task: </span><span class="si">%s</span><span class="s2">.&quot;</span><span class="p">,</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="kc">False</span></div>
<div class="viewcode-block" id="DebugExecutor.queue_task_instance"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.queue_task_instance">[docs]</a> <span class="k">def</span> <span class="nf">queue_task_instance</span><span class="p">(</span>
<span class="bp">self</span><span class="p">,</span>
<span class="n">task_instance</span><span class="p">,</span>
<span class="n">mark_success</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">pickle_id</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">ignore_all_deps</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">ignore_depends_on_past</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">ignore_task_deps</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">ignore_ti_state</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">pool</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">cfg_path</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Queues task instance with empty command because we do not need it.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">queue_command</span><span class="p">(</span>
<span class="n">task_instance</span><span class="p">,</span>
<span class="p">[</span><span class="nb">str</span><span class="p">(</span><span class="n">task_instance</span><span class="p">)],</span> <span class="c1"># Just for better logging, it&#39;s not used anywhere</span>
<span class="n">priority</span><span class="o">=</span><span class="n">task_instance</span><span class="o">.</span><span class="n">task</span><span class="o">.</span><span class="n">priority_weight_total</span><span class="p">,</span>
<span class="n">queue</span><span class="o">=</span><span class="n">task_instance</span><span class="o">.</span><span class="n">task</span><span class="o">.</span><span class="n">queue</span><span class="p">,</span>
<span class="p">)</span>
<span class="c1"># Save params for TaskInstance._run_raw_task</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tasks_params</span><span class="p">[</span><span class="n">task_instance</span><span class="o">.</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">&quot;mark_success&quot;</span><span class="p">:</span> <span class="n">mark_success</span><span class="p">,</span>
<span class="s2">&quot;pool&quot;</span><span class="p">:</span> <span class="n">pool</span><span class="p">,</span></div>
<span class="p">}</span>
<div class="viewcode-block" id="DebugExecutor.trigger_tasks"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.trigger_tasks">[docs]</a> <span class="k">def</span> <span class="nf">trigger_tasks</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">open_slots</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Triggers tasks. Instead of calling exec_async we just</span>
<span class="sd"> add task instance to tasks_to_run queue.</span>
<span class="sd"> :param open_slots: Number of open slots</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">sorted_queue</span> <span class="o">=</span> <span class="nb">sorted</span><span class="p">(</span>
<span class="p">[(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">queued_tasks</span><span class="o">.</span><span class="n">items</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="p">[</span><span class="mi">1</span><span class="p">][</span><span class="mi">1</span><span class="p">],</span>
<span class="n">reverse</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="nb">min</span><span class="p">((</span><span class="n">open_slots</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">queued_tasks</span><span class="p">)))):</span>
<span class="n">key</span><span class="p">,</span> <span class="p">(</span><span class="n">_</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">_</span><span class="p">,</span> <span class="n">ti</span><span class="p">)</span> <span class="o">=</span> <span class="n">sorted_queue</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">queued_tasks</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">running</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">ti</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tasks_to_run</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">ti</span><span class="p">)</span> <span class="c1"># type: ignore</span></div>
<div class="viewcode-block" id="DebugExecutor.end"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.end">[docs]</a> <span class="k">def</span> <span class="nf">end</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> When the method is called we just set states of queued tasks</span>
<span class="sd"> to UPSTREAM_FAILED marking them as not executed.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">for</span> <span class="n">ti</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks_to_run</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">&quot;Setting </span><span class="si">%s</span><span class="s2"> to </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">UPSTREAM_FAILED</span><span class="p">)</span>
<span class="n">ti</span><span class="o">.</span><span class="n">set_state</span><span class="p">(</span><span class="n">State</span><span class="o">.</span><span class="n">UPSTREAM_FAILED</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="n">ti</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">State</span><span class="o">.</span><span class="n">UPSTREAM_FAILED</span><span class="p">)</span></div>
<div class="viewcode-block" id="DebugExecutor.terminate"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.terminate">[docs]</a> <span class="k">def</span> <span class="nf">terminate</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_terminated</span><span class="o">.</span><span class="n">set</span><span class="p">()</span></div>
<div class="viewcode-block" id="DebugExecutor.change_state"><a class="viewcode-back" href="../../../_api/airflow/executors/debug_executor/index.html#airflow.executors.debug_executor.DebugExecutor.change_state">[docs]</a> <span class="k">def</span> <span class="nf">change_state</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">state</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">&quot;Popping </span><span class="si">%s</span><span class="s2"> from executor task queue.&quot;</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">running</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">event_buffer</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">state</span></div></div>
</pre></div>
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