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Posted to commits@airflow.apache.org by ka...@apache.org on 2018/08/27 16:26:38 UTC
[18/51] [partial] incubator-airflow-site git commit: 1.10.0
http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/11437c14/_modules/airflow/executors/local_executor.html
----------------------------------------------------------------------
diff --git a/_modules/airflow/executors/local_executor.html b/_modules/airflow/executors/local_executor.html
index cfbf241..24436b4 100644
--- a/_modules/airflow/executors/local_executor.html
+++ b/_modules/airflow/executors/local_executor.html
@@ -91,7 +91,7 @@
<li class="toctree-l1"><a class="reference internal" href="../../../start.html">Quick Start</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../installation.html">Installation</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../tutorial.html">Tutorial</a></li>
-<li class="toctree-l1"><a class="reference internal" href="../../../configuration.html">Configuration</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../../../howto/index.html">How-to Guides</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../ui.html">UI / Screenshots</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../concepts.html">Concepts</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../profiling.html">Data Profiling</a></li>
@@ -99,8 +99,10 @@
<li class="toctree-l1"><a class="reference internal" href="../../../scheduler.html">Scheduling & Triggers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../plugins.html">Plugins</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../security.html">Security</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../../../timezone.html">Time zones</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../api.html">Experimental Rest API</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../integration.html">Integration</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../../../lineage.html">Lineage</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../faq.html">FAQ</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../code.html">API Reference</a></li>
</ul>
@@ -169,17 +171,49 @@
<h1>Source code for airflow.executors.local_executor</h1><div class="highlight"><pre>
<span></span><span class="c1"># -*- coding: utf-8 -*-</span>
<span class="c1">#</span>
-<span class="c1"># Licensed under the Apache License, Version 2.0 (the "License");</span>
-<span class="c1"># you may not use this file except in compliance with the License.</span>
-<span class="c1"># 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, software</span>
-<span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span>
-<span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
-<span class="c1"># See the License for the specific language governing permissions and</span>
-<span class="c1"># limitations under the License.</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="sd">"""</span>
+<span class="sd">LocalExecutor runs tasks by spawning processes in a controlled fashion in different</span>
+<span class="sd">modes. Given that BaseExecutor has the option to receive a `parallelism` parameter to</span>
+<span class="sd">limit the number of process spawned, when this parameter is `0` the number of processes</span>
+<span class="sd">that LocalExecutor can spawn is unlimited.</span>
+
+<span class="sd">The following strategies are implemented:</span>
+<span class="sd">1. Unlimited Parallelism (self.parallelism == 0): In this strategy, LocalExecutor will</span>
+<span class="sd">spawn a process every time `execute_async` is called, that is, every task submitted to the</span>
+<span class="sd">LocalExecutor will be executed in its own process. Once the task is executed and the</span>
+<span class="sd">result stored in the `result_queue`, the process terminates. There is no need for a</span>
+<span class="sd">`task_queue` in this approach, since as soon as a task is received a new process will be</span>
+<span class="sd">allocated to the task. Processes used in this strategy are of class LocalWorker.</span>
+
+<span class="sd">2. Limited Parallelism (self.parallelism > 0): In this strategy, the LocalExecutor spawns</span>
+<span class="sd">the number of processes equal to the value of `self.parallelism` at `start` time,</span>
+<span class="sd">using a `task_queue` to coordinate the ingestion of tasks and the work distribution among</span>
+<span class="sd">the workers, which will take a task as soon as they are ready. During the lifecycle of</span>
+<span class="sd">the LocalExecutor, the worker processes are running waiting for tasks, once the</span>
+<span class="sd">LocalExecutor receives the call to shutdown the executor a poison token is sent to the</span>
+<span class="sd">workers to terminate them. Processes used in this strategy are of class QueuedLocalWorker.</span>
+
+<span class="sd">Arguably, `SequentialExecutor` could be thought as a LocalExecutor with limited</span>
+<span class="sd">parallelism of just 1 worker, i.e. `self.parallelism = 1`.</span>
+<span class="sd">This option could lead to the unification of the executor implementations, running</span>
+<span class="sd">locally, into just one `LocalExecutor` with multiple modes.</span>
+<span class="sd">"""</span>
<span class="kn">import</span> <span class="nn">multiprocessing</span>
<span class="kn">import</span> <span class="nn">subprocess</span>
@@ -187,20 +221,63 @@
<span class="kn">from</span> <span class="nn">builtins</span> <span class="k">import</span> <span class="nb">range</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.executors.base_executor</span> <span class="k">import</span> <span class="n">BaseExecutor</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.utils.state</span> <span class="k">import</span> <span class="n">State</span>
-<span class="n">PARALLELISM</span> <span class="o">=</span> <span class="n">configuration</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'core'</span><span class="p">,</span> <span class="s1">'PARALLELISM'</span><span class="p">)</span>
-
<span class="k">class</span> <span class="nc">LocalWorker</span><span class="p">(</span><span class="n">multiprocessing</span><span class="o">.</span><span class="n">Process</span><span class="p">,</span> <span class="n">LoggingMixin</span><span class="p">):</span>
+
+ <span class="sd">"""LocalWorker Process implementation to run airflow commands. Executes the given</span>
+<span class="sd"> command and puts the result into a result queue when done, terminating execution."""</span>
+
+ <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">result_queue</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> :param result_queue: the queue to store result states tuples (key, State)</span>
+<span class="sd"> :type result_queue: multiprocessing.Queue</span>
+<span class="sd"> """</span>
+ <span class="nb">super</span><span class="p">(</span><span class="n">LocalWorker</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">daemon</span> <span class="o">=</span> <span class="kc">True</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span> <span class="o">=</span> <span class="n">result_queue</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">key</span> <span class="o">=</span> <span class="kc">None</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">command</span> <span class="o">=</span> <span class="kc">None</span>
+
+ <span class="k">def</span> <span class="nf">execute_work</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">command</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> Executes command received and stores result state in queue.</span>
+<span class="sd"> :param key: the key to identify the TI</span>
+<span class="sd"> :type key: Tuple(dag_id, task_id, execution_date)</span>
+<span class="sd"> :param command: the command to execute</span>
+<span class="sd"> :type command: string</span>
+<span class="sd"> """</span>
+ <span class="k">if</span> <span class="n">key</span> <span class="ow">is</span> <span class="kc">None</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">"</span><span class="si">%s</span><span class="s2"> running </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span>
+ <span class="n">command</span> <span class="o">=</span> <span class="s2">"exec bash -c '</span><span class="si">{0}</span><span class="s2">'"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">command</span><span class="p">)</span>
+ <span class="k">try</span><span class="p">:</span>
+ <span class="n">subprocess</span><span class="o">.</span><span class="n">check_call</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="n">shell</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">close_fds</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
+ <span class="n">state</span> <span class="o">=</span> <span class="n">State</span><span class="o">.</span><span class="n">SUCCESS</span>
+ <span class="k">except</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">CalledProcessError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
+ <span class="n">state</span> <span class="o">=</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to execute task </span><span class="si">%s</span><span class="s2">."</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="c1"># TODO: Why is this commented out?</span>
+ <span class="c1"># raise e</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">put</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="k">def</span> <span class="nf">run</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">execute_work</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">command</span><span class="p">)</span>
+ <span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+
+
+<span class="k">class</span> <span class="nc">QueuedLocalWorker</span><span class="p">(</span><span class="n">LocalWorker</span><span class="p">):</span>
+
+ <span class="sd">"""LocalWorker implementation that is waiting for tasks from a queue and will</span>
+<span class="sd"> continue executing commands as they become available in the queue. It will terminate</span>
+<span class="sd"> execution once the poison token is found."""</span>
+
<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">task_queue</span><span class="p">,</span> <span class="n">result_queue</span><span class="p">):</span>
- <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Process</span><span class="o">.</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">QueuedLocalWorker</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="n">result_queue</span><span class="o">=</span><span class="n">result_queue</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">task_queue</span> <span class="o">=</span> <span class="n">task_queue</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span> <span class="o">=</span> <span class="n">result_queue</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">daemon</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">def</span> <span class="nf">run</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
@@ -209,55 +286,120 @@
<span class="c1"># Received poison pill, no more tasks to run</span>
<span class="bp">self</span><span class="o">.</span><span class="n">task_queue</span><span class="o">.</span><span class="n">task_done</span><span class="p">()</span>
<span class="k">break</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">"</span><span class="si">%s</span><span class="s2"> running </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span>
- <span class="n">command</span> <span class="o">=</span> <span class="s2">"exec bash -c '</span><span class="si">{0}</span><span class="s2">'"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">command</span><span class="p">)</span>
- <span class="k">try</span><span class="p">:</span>
- <span class="n">subprocess</span><span class="o">.</span><span class="n">check_call</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="n">shell</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
- <span class="n">state</span> <span class="o">=</span> <span class="n">State</span><span class="o">.</span><span class="n">SUCCESS</span>
- <span class="k">except</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">CalledProcessError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
- <span class="n">state</span> <span class="o">=</span> <span class="n">State</span><span class="o">.</span><span class="n">FAILED</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to execute task </span><span class="si">%s</span><span class="s2">."</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="c1"># TODO: Why is this commented out?</span>
- <span class="c1"># raise e</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">put</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">execute_work</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">task_queue</span><span class="o">.</span><span class="n">task_done</span><span class="p">()</span>
<span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
-<div class="viewcode-block" id="LocalExecutor"><a class="viewcode-back" href="../../../code.html#airflow.executors.LocalExecutor">[docs]</a><span class="k">class</span> <span class="nc">LocalExecutor</span><span class="p">(</span><span class="n">BaseExecutor</span><span class="p">):</span>
+<div class="viewcode-block" id="LocalExecutor"><a class="viewcode-back" href="../../../code.html#airflow.executors.local_executor.LocalExecutor">[docs]</a><span class="k">class</span> <span class="nc">LocalExecutor</span><span class="p">(</span><span class="n">BaseExecutor</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> LocalExecutor executes tasks locally in parallel. It uses the</span>
<span class="sd"> multiprocessing Python library and queues to parallelize the execution</span>
<span class="sd"> of tasks.</span>
<span class="sd"> """</span>
+ <span class="k">class</span> <span class="nc">_UnlimitedParallelism</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
+ <span class="sd">"""Implements LocalExecutor with unlimited parallelism, starting one process</span>
+<span class="sd"> per each command to execute."""</span>
+
+ <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">executor</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> :param executor: the executor instance to implement.</span>
+<span class="sd"> :type executor: LocalExecutor</span>
+<span class="sd"> """</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span> <span class="o">=</span> <span class="n">executor</span>
+
+ <span class="k">def</span> <span class="nf">start</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">executor</span><span class="o">.</span><span class="n">workers_used</span> <span class="o">=</span> <span class="mi">0</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers_active</span> <span class="o">=</span> <span class="mi">0</span>
+
+ <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="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> :param key: the key to identify the TI</span>
+<span class="sd"> :type key: Tuple(dag_id, task_id, execution_date)</span>
+<span class="sd"> :param command: the command to execute</span>
+<span class="sd"> :type command: string</span>
+<span class="sd"> """</span>
+ <span class="n">local_worker</span> <span class="o">=</span> <span class="n">LocalWorker</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">result_queue</span><span class="p">)</span>
+ <span class="n">local_worker</span><span class="o">.</span><span class="n">key</span> <span class="o">=</span> <span class="n">key</span>
+ <span class="n">local_worker</span><span class="o">.</span><span class="n">command</span> <span class="o">=</span> <span class="n">command</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers_used</span> <span class="o">+=</span> <span class="mi">1</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers_active</span> <span class="o">+=</span> <span class="mi">1</span>
+ <span class="n">local_worker</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
+
+ <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="k">while</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">empty</span><span class="p">():</span>
+ <span class="n">results</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">get</span><span class="p">()</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="o">*</span><span class="n">results</span><span class="p">)</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers_active</span> <span class="o">-=</span> <span class="mi">1</span>
+
+ <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="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers_active</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">sync</span><span class="p">()</span>
+ <span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mf">0.5</span><span class="p">)</span>
+
+ <span class="k">class</span> <span class="nc">_LimitedParallelism</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
+ <span class="sd">"""Implements LocalExecutor with limited parallelism using a task queue to</span>
+<span class="sd"> coordinate work distribution."""</span>
+
+ <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">executor</span><span class="p">):</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span> <span class="o">=</span> <span class="n">executor</span>
+
+ <span class="k">def</span> <span class="nf">start</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">executor</span><span class="o">.</span><span class="n">queue</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">JoinableQueue</span><span class="p">()</span>
+
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers</span> <span class="o">=</span> <span class="p">[</span>
+ <span class="n">QueuedLocalWorker</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">queue</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">result_queue</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="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">parallelism</span><span class="p">)</span>
+ <span class="p">]</span>
+
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers_used</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers</span><span class="p">)</span>
+
+ <span class="k">for</span> <span class="n">w</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers</span><span class="p">:</span>
+ <span class="n">w</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
+
+ <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="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> :param key: the key to identify the TI</span>
+<span class="sd"> :type key: Tuple(dag_id, task_id, execution_date)</span>
+<span class="sd"> :param command: the command to execute</span>
+<span class="sd"> :type command: string</span>
+<span class="sd"> """</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">queue</span><span class="o">.</span><span class="n">put</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">))</span>
+
+ <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="k">while</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">empty</span><span class="p">():</span>
+ <span class="n">results</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">get</span><span class="p">()</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">change_state</span><span class="p">(</span><span class="o">*</span><span class="n">results</span><span class="p">)</span>
+
+ <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="c1"># Sending poison pill to all worker</span>
+ <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">workers</span><span class="p">:</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">queue</span><span class="o">.</span><span class="n">put</span><span class="p">((</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">))</span>
+
+ <span class="c1"># Wait for commands to finish</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">queue</span><span class="o">.</span><span class="n">join</span><span class="p">()</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">executor</span><span class="o">.</span><span class="n">sync</span><span class="p">()</span>
+
<span class="k">def</span> <span class="nf">start</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">queue</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">JoinableQueue</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span> <span class="o">=</span> <span class="n">multiprocessing</span><span class="o">.</span><span class="n">Queue</span><span class="p">()</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">workers</span> <span class="o">=</span> <span class="p">[</span>
- <span class="n">LocalWorker</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">queue</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</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="bp">self</span><span class="o">.</span><span class="n">parallelism</span><span class="p">)</span>
- <span class="p">]</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">queue</span> <span class="o">=</span> <span class="kc">None</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">workers</span> <span class="o">=</span> <span class="p">[]</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">workers_used</span> <span class="o">=</span> <span class="mi">0</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">workers_active</span> <span class="o">=</span> <span class="mi">0</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">impl</span> <span class="o">=</span> <span class="p">(</span><span class="n">LocalExecutor</span><span class="o">.</span><span class="n">_UnlimitedParallelism</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">parallelism</span> <span class="o">==</span> <span class="mi">0</span>
+ <span class="k">else</span> <span class="n">LocalExecutor</span><span class="o">.</span><span class="n">_LimitedParallelism</span><span class="p">(</span><span class="bp">self</span><span class="p">))</span>
- <span class="k">for</span> <span class="n">w</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">workers</span><span class="p">:</span>
- <span class="n">w</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">impl</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
- <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="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">,</span> <span class="n">queue</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">queue</span><span class="o">.</span><span class="n">put</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">))</span>
+ <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="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">,</span> <span class="n">queue</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">executor_config</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">impl</span><span class="o">.</span><span class="n">execute_async</span><span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="n">key</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="n">command</span><span class="p">)</span>
<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="k">while</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">empty</span><span class="p">():</span>
- <span class="n">results</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">result_queue</span><span class="o">.</span><span class="n">get</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="o">*</span><span class="n">results</span><span class="p">)</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">impl</span><span class="o">.</span><span class="n">sync</span><span class="p">()</span>
<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="c1"># Sending poison pill to all worker</span>
- <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">workers</span><span class="p">:</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">queue</span><span class="o">.</span><span class="n">put</span><span class="p">((</span><span class="kc">None</span><span class="p">,</span> <span class="kc">None</span><span class="p">))</span>
-
- <span class="c1"># Wait for commands to finish</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">queue</span><span class="o">.</span><span class="n">join</span><span class="p">()</span>
- <span class="bp">self</span><span class="o">.</span><span class="n">sync</span><span class="p">()</span></div>
+ <span class="bp">self</span><span class="o">.</span><span class="n">impl</span><span class="o">.</span><span class="n">end</span><span class="p">()</span></div>
</pre></div>
</div>
http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/11437c14/_modules/airflow/executors/sequential_executor.html
----------------------------------------------------------------------
diff --git a/_modules/airflow/executors/sequential_executor.html b/_modules/airflow/executors/sequential_executor.html
index 2c7dbac..41373f5 100644
--- a/_modules/airflow/executors/sequential_executor.html
+++ b/_modules/airflow/executors/sequential_executor.html
@@ -91,7 +91,7 @@
<li class="toctree-l1"><a class="reference internal" href="../../../start.html">Quick Start</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../installation.html">Installation</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../tutorial.html">Tutorial</a></li>
-<li class="toctree-l1"><a class="reference internal" href="../../../configuration.html">Configuration</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../../../howto/index.html">How-to Guides</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../ui.html">UI / Screenshots</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../concepts.html">Concepts</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../profiling.html">Data Profiling</a></li>
@@ -99,8 +99,10 @@
<li class="toctree-l1"><a class="reference internal" href="../../../scheduler.html">Scheduling & Triggers</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../plugins.html">Plugins</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../security.html">Security</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../../../timezone.html">Time zones</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../api.html">Experimental Rest API</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../integration.html">Integration</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../../../lineage.html">Lineage</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../faq.html">FAQ</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../../code.html">API Reference</a></li>
</ul>
@@ -169,17 +171,22 @@
<h1>Source code for airflow.executors.sequential_executor</h1><div class="highlight"><pre>
<span></span><span class="c1"># -*- coding: utf-8 -*-</span>
<span class="c1">#</span>
-<span class="c1"># Licensed under the Apache License, Version 2.0 (the "License");</span>
-<span class="c1"># you may not use this file except in compliance with the License.</span>
-<span class="c1"># 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, software</span>
-<span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span>
-<span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
-<span class="c1"># See the License for the specific language governing permissions and</span>
-<span class="c1"># limitations under the License.</span>
+<span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span>
+<span class="c1"># or more contributor license agreements. See the NOTICE file</span>
+<span class="c1"># distributed with this work for additional information</span>
+<span class="c1"># regarding copyright ownership. The ASF licenses this file</span>
+<span class="c1"># to you under the Apache License, Version 2.0 (the</span>
+<span class="c1"># "License"); you may not use this file except in compliance</span>
+<span class="c1"># with the License. You may obtain a copy of the License at</span>
+<span class="c1"># </span>
+<span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span>
+<span class="c1"># </span>
+<span class="c1"># Unless required by applicable law or agreed to in writing,</span>
+<span class="c1"># software distributed under the License is distributed on an</span>
+<span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span>
+<span class="c1"># KIND, either express or implied. See the License for the</span>
+<span class="c1"># specific language governing permissions and limitations</span>
+<span class="c1"># under the License.</span>
<span class="kn">from</span> <span class="nn">builtins</span> <span class="k">import</span> <span class="nb">str</span>
<span class="kn">import</span> <span class="nn">subprocess</span>
@@ -188,7 +195,7 @@
<span class="kn">from</span> <span class="nn">airflow.utils.state</span> <span class="k">import</span> <span class="n">State</span>
-<div class="viewcode-block" id="SequentialExecutor"><a class="viewcode-back" href="../../../code.html#airflow.executors.SequentialExecutor">[docs]</a><span class="k">class</span> <span class="nc">SequentialExecutor</span><span class="p">(</span><span class="n">BaseExecutor</span><span class="p">):</span>
+<div class="viewcode-block" id="SequentialExecutor"><a class="viewcode-back" href="../../../code.html#airflow.executors.sequential_executor.SequentialExecutor">[docs]</a><span class="k">class</span> <span class="nc">SequentialExecutor</span><span class="p">(</span><span class="n">BaseExecutor</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> This executor will only run one task instance at a time, can be used</span>
<span class="sd"> for debugging. It is also the only executor that can be used with sqlite</span>
@@ -201,7 +208,7 @@
<span class="nb">super</span><span class="p">(</span><span class="n">SequentialExecutor</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">commands_to_run</span> <span class="o">=</span> <span class="p">[]</span>
- <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="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">,</span> <span class="n">queue</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
+ <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="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">,</span> <span class="n">queue</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">executor_config</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">commands_to_run</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">key</span><span class="p">,</span> <span class="n">command</span><span class="p">,))</span>
<span class="k">def</span> <span class="nf">sync</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
@@ -209,7 +216,7 @@
<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">"Executing command: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">command</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
- <span class="n">subprocess</span><span class="o">.</span><span class="n">check_call</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="n">shell</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
+ <span class="n">subprocess</span><span class="o">.</span><span class="n">check_call</span><span class="p">(</span><span class="n">command</span><span class="p">,</span> <span class="n">shell</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">close_fds</span><span class="o">=</span><span class="kc">True</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">except</span> <span class="n">subprocess</span><span class="o">.</span><span class="n">CalledProcessError</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">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>