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Posted to commits@airflow.apache.org by ma...@apache.org on 2016/06/05 05:24:23 UTC
[33/34] incubator-airflow-site git commit: Initial commit
http://git-wip-us.apache.org/repos/asf/incubator-airflow-site/blob/9e19165c/_modules/airflow/contrib/operators/hipchat_operator.html
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diff --git a/_modules/airflow/contrib/operators/hipchat_operator.html b/_modules/airflow/contrib/operators/hipchat_operator.html
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+ <h1>Source code for airflow.contrib.operators.hipchat_operator</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="kn">from</span> <span class="nn">airflow.utils.decorators</span> <span class="kn">import</span> <span class="n">apply_defaults</span>
+<span class="kn">from</span> <span class="nn">airflow.models</span> <span class="kn">import</span> <span class="n">BaseOperator</span>
+<span class="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="kn">import</span> <span class="n">AirflowException</span>
+<span class="kn">import</span> <span class="nn">logging</span>
+<span class="kn">import</span> <span class="nn">requests</span>
+<span class="kn">import</span> <span class="nn">json</span>
+
+
+<div class="viewcode-block" id="HipChatAPIOperator"><a class="viewcode-back" href="../../../../code.html#airflow.contrib.operators.hipchat_operator.HipChatAPIOperator">[docs]</a><span class="k">class</span> <span class="nc">HipChatAPIOperator</span><span class="p">(</span><span class="n">BaseOperator</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> Base HipChat Operator.</span>
+<span class="sd"> All derived HipChat operators reference from HipChat's official REST API documentation</span>
+<span class="sd"> at https://www.hipchat.com/docs/apiv2. Before using any HipChat API operators you need</span>
+<span class="sd"> to get an authentication token at https://www.hipchat.com/docs/apiv2/auth.</span>
+<span class="sd"> In the future additional HipChat operators will be derived from this class as well.</span>
+
+<span class="sd"> :param token: HipChat REST API authentication token</span>
+<span class="sd"> :type token: str</span>
+<span class="sd"> :param base_url: HipChat REST API base url.</span>
+<span class="sd"> :type base_url: str</span>
+<span class="sd"> """</span>
+ <span class="nd">@apply_defaults</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">token</span><span class="p">,</span>
+ <span class="n">base_url</span><span class="o">=</span><span class="s1">'https://api.hipchat.com/v2'</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>
+ <span class="nb">super</span><span class="p">(</span><span class="n">HipChatAPIOperator</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</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>
+ <span class="bp">self</span><span class="o">.</span><span class="n">token</span> <span class="o">=</span> <span class="n">token</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">base_url</span> <span class="o">=</span> <span class="n">base_url</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">method</span> <span class="o">=</span> <span class="bp">None</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">url</span> <span class="o">=</span> <span class="bp">None</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">body</span> <span class="o">=</span> <span class="bp">None</span>
+
+ <span class="k">def</span> <span class="nf">prepare_request</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> Used by the execute function. Set the request method, url, and body of HipChat's</span>
+<span class="sd"> REST API call.</span>
+
+<span class="sd"> Override in child class. Each HipChatAPI child operator is responsible for having</span>
+<span class="sd"> a prepare_request method call which sets self.method, self.url, and self.body.</span>
+<span class="sd"> """</span>
+ <span class="k">pass</span>
+
+ <span class="k">def</span> <span class="nf">execute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">):</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">prepare_request</span><span class="p">()</span>
+
+ <span class="n">response</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">request</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">method</span><span class="p">,</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">url</span><span class="p">,</span>
+ <span class="n">headers</span><span class="o">=</span><span class="p">{</span>
+ <span class="s1">'Content-Type'</span><span class="p">:</span> <span class="s1">'application/json'</span><span class="p">,</span>
+ <span class="s1">'Authorization'</span><span class="p">:</span> <span class="s1">'Bearer </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">token</span><span class="p">},</span>
+ <span class="n">data</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">body</span><span class="p">)</span>
+ <span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">status_code</span> <span class="o">>=</span> <span class="mi">400</span><span class="p">:</span>
+ <span class="n">logging</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s1">'HipChat API call failed: </span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span>
+ <span class="n">response</span><span class="o">.</span><span class="n">status_code</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">reason</span><span class="p">)</span>
+ <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">'HipChat API call failed: </span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span>
+ <span class="p">(</span><span class="n">response</span><span class="o">.</span><span class="n">status_code</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">reason</span><span class="p">))</span></div>
+
+
+<div class="viewcode-block" id="HipChatAPISendRoomNotificationOperator"><a class="viewcode-back" href="../../../../code.html#airflow.contrib.operators.hipchat_operator.HipChatAPISendRoomNotificationOperator">[docs]</a><span class="k">class</span> <span class="nc">HipChatAPISendRoomNotificationOperator</span><span class="p">(</span><span class="n">HipChatAPIOperator</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> Send notification to a specific HipChat room.</span>
+<span class="sd"> More info: https://www.hipchat.com/docs/apiv2/method/send_room_notification</span>
+
+<span class="sd"> :param room_id: Room in which to send notification on HipChat</span>
+<span class="sd"> :type room_id: str</span>
+<span class="sd"> :param message: The message body</span>
+<span class="sd"> :type message: str</span>
+<span class="sd"> :param frm: Label to be shown in addition to sender's name</span>
+<span class="sd"> :type frm: str</span>
+<span class="sd"> :param message_format: How the notification is rendered: html or text</span>
+<span class="sd"> :type message_format: str</span>
+<span class="sd"> :param color: Background color of the msg: yellow, green, red, purple, gray, or random</span>
+<span class="sd"> :type color: str</span>
+<span class="sd"> :param attach_to: The message id to attach this notification to</span>
+<span class="sd"> :type attach_to: str</span>
+<span class="sd"> :param notify: Whether this message should trigger a user notification</span>
+<span class="sd"> :type notify: bool</span>
+<span class="sd"> :param card: HipChat-defined card object</span>
+<span class="sd"> :type card: dict</span>
+<span class="sd"> """</span>
+ <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'token'</span><span class="p">,</span> <span class="s1">'room_id'</span><span class="p">,</span> <span class="s1">'message'</span><span class="p">)</span>
+ <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#2980b9'</span>
+
+ <span class="nd">@apply_defaults</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">room_id</span><span class="p">,</span> <span class="n">message</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>
+ <span class="nb">super</span><span class="p">(</span><span class="n">HipChatAPISendRoomNotificationOperator</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</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>
+ <span class="bp">self</span><span class="o">.</span><span class="n">room_id</span> <span class="o">=</span> <span class="n">room_id</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">message</span> <span class="o">=</span> <span class="n">message</span>
+ <span class="n">default_options</span> <span class="o">=</span> <span class="p">{</span>
+ <span class="s1">'message_format'</span><span class="p">:</span> <span class="s1">'html'</span><span class="p">,</span>
+ <span class="s1">'color'</span><span class="p">:</span> <span class="s1">'yellow'</span><span class="p">,</span>
+ <span class="s1">'frm'</span><span class="p">:</span> <span class="s1">'airflow'</span><span class="p">,</span>
+ <span class="s1">'attach_to'</span><span class="p">:</span> <span class="bp">None</span><span class="p">,</span>
+ <span class="s1">'notify'</span><span class="p">:</span> <span class="bp">False</span><span class="p">,</span>
+ <span class="s1">'card'</span><span class="p">:</span> <span class="bp">None</span>
+ <span class="p">}</span>
+ <span class="k">for</span> <span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">default</span><span class="p">)</span> <span class="ow">in</span> <span class="n">default_options</span><span class="o">.</span><span class="n">iteritems</span><span class="p">():</span>
+ <span class="nb">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop</span><span class="p">,</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">default</span><span class="p">))</span>
+
+ <span class="k">def</span> <span class="nf">prepare_request</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
+ <span class="n">params</span> <span class="o">=</span> <span class="p">{</span>
+ <span class="s1">'message'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">message</span><span class="p">,</span>
+ <span class="s1">'message_format'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">message_format</span><span class="p">,</span>
+ <span class="s1">'color'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">,</span>
+ <span class="s1">'from'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">frm</span><span class="p">,</span>
+ <span class="s1">'attach_to'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">attach_to</span><span class="p">,</span>
+ <span class="s1">'notify'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">notify</span><span class="p">,</span>
+ <span class="s1">'card'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">card</span>
+ <span class="p">}</span>
+
+ <span class="bp">self</span><span class="o">.</span><span class="n">method</span> <span class="o">=</span> <span class="s1">'POST'</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">url</span> <span class="o">=</span> <span class="s1">'</span><span class="si">%s</span><span class="s1">/room/</span><span class="si">%s</span><span class="s1">/notification'</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base_url</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">room_id</span><span class="p">)</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">body</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="nb">dict</span><span class="p">(</span>
+ <span class="p">(</span><span class="n">k</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="n">v</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="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">params</span><span class="o">.</span><span class="n">iteritems</span><span class="p">()</span> <span class="k">if</span> <span class="n">v</span><span class="p">))</span></div>
+</pre></div>
+
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+
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+ <h1>Source code for airflow.executors.celery_executor</h1><div class="highlight"><pre>
+<span></span><span class="kn">from</span> <span class="nn">builtins</span> <span class="kn">import</span> <span class="nb">object</span>
+<span class="kn">import</span> <span class="nn">logging</span>
+<span class="kn">import</span> <span class="nn">subprocess</span>
+<span class="kn">import</span> <span class="nn">time</span>
+
+<span class="kn">from</span> <span class="nn">celery</span> <span class="kn">import</span> <span class="n">Celery</span>
+<span class="kn">from</span> <span class="nn">celery</span> <span class="kn">import</span> <span class="n">states</span> <span class="k">as</span> <span class="n">celery_states</span>
+
+<span class="kn">from</span> <span class="nn">airflow.exceptions</span> <span class="kn">import</span> <span class="n">AirflowException</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</span> <span class="kn">import</span> <span class="n">configuration</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="sd">'''</span>
+<span class="sd">To start the celery worker, run the command:</span>
+<span class="sd">airflow worker</span>
+<span class="sd">'''</span>
+
+<span class="n">DEFAULT_QUEUE</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">'celery'</span><span class="p">,</span> <span class="s1">'DEFAULT_QUEUE'</span><span class="p">)</span>
+
+
+<span class="k">class</span> <span class="nc">CeleryConfig</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
+ <span class="n">CELERY_ACCEPT_CONTENT</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'json'</span><span class="p">,</span> <span class="s1">'pickle'</span><span class="p">]</span>
+ <span class="n">CELERYD_PREFETCH_MULTIPLIER</span> <span class="o">=</span> <span class="mi">1</span>
+ <span class="n">CELERY_ACKS_LATE</span> <span class="o">=</span> <span class="bp">True</span>
+ <span class="n">BROKER_URL</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">'celery'</span><span class="p">,</span> <span class="s1">'BROKER_URL'</span><span class="p">)</span>
+ <span class="n">CELERY_RESULT_BACKEND</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">'celery'</span><span class="p">,</span> <span class="s1">'CELERY_RESULT_BACKEND'</span><span class="p">)</span>
+ <span class="n">CELERYD_CONCURRENCY</span> <span class="o">=</span> <span class="n">configuration</span><span class="o">.</span><span class="n">getint</span><span class="p">(</span><span class="s1">'celery'</span><span class="p">,</span> <span class="s1">'CELERYD_CONCURRENCY'</span><span class="p">)</span>
+ <span class="n">CELERY_DEFAULT_QUEUE</span> <span class="o">=</span> <span class="n">DEFAULT_QUEUE</span>
+ <span class="n">CELERY_DEFAULT_EXCHANGE</span> <span class="o">=</span> <span class="n">DEFAULT_QUEUE</span>
+
+<span class="n">app</span> <span class="o">=</span> <span class="n">Celery</span><span class="p">(</span>
+ <span class="n">configuration</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'celery'</span><span class="p">,</span> <span class="s1">'CELERY_APP_NAME'</span><span class="p">),</span>
+ <span class="n">config_source</span><span class="o">=</span><span class="n">CeleryConfig</span><span class="p">)</span>
+
+
+<span class="nd">@app.task</span>
+<span class="k">def</span> <span class="nf">execute_command</span><span class="p">(</span><span class="n">command</span><span class="p">):</span>
+ <span class="n">logging</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Executing command in Celery "</span> <span class="o">+</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="bp">True</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="n">logging</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="n">e</span><span class="p">)</span>
+ <span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">'Celery command failed'</span><span class="p">)</span>
+
+
+<div class="viewcode-block" id="CeleryExecutor"><a class="viewcode-back" href="../../../code.html#airflow.executors.CeleryExecutor">[docs]</a><span class="k">class</span> <span class="nc">CeleryExecutor</span><span class="p">(</span><span class="n">BaseExecutor</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> CeleryExecutor is recommended for production use of Airflow. It allows</span>
+<span class="sd"> distributing the execution of task instances to multiple worker nodes.</span>
+
+<span class="sd"> Celery is a simple, flexible and reliable distributed system to process</span>
+<span class="sd"> vast amounts of messages, while providing operations with the tools</span>
+<span class="sd"> required to maintain such a system.</span>
+<span class="sd"> """</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">tasks</span> <span class="o">=</span> <span class="p">{}</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">last_state</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="n">DEFAULT_QUEUE</span><span class="p">):</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> <span class="s2">"[celery] queuing {key} through celery, "</span>
+ <span class="s2">"queue={queue}"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="o">**</span><span class="nb">locals</span><span class="p">()))</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">tasks</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">execute_command</span><span class="o">.</span><span class="n">apply_async</span><span class="p">(</span>
+ <span class="n">args</span><span class="o">=</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="n">queue</span><span class="p">)</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">last_state</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">celery_states</span><span class="o">.</span><span class="n">PENDING</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="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span>
+ <span class="s2">"Inquiring about {} celery task(s)"</span><span class="o">.</span><span class="n">format</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">tasks</span><span class="p">)))</span>
+ <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">async</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">tasks</span><span class="o">.</span><span class="n">items</span><span class="p">()):</span>
+ <span class="n">state</span> <span class="o">=</span> <span class="n">async</span><span class="o">.</span><span class="n">state</span>
+ <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_state</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">!=</span> <span class="n">state</span><span class="p">:</span>
+ <span class="k">if</span> <span class="n">state</span> <span class="o">==</span> <span class="n">celery_states</span><span class="o">.</span><span class="n">SUCCESS</span><span class="p">:</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">success</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
+ <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
+ <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_state</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
+ <span class="k">elif</span> <span class="n">state</span> <span class="o">==</span> <span class="n">celery_states</span><span class="o">.</span><span class="n">FAILURE</span><span class="p">:</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">fail</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
+ <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
+ <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_state</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
+ <span class="k">elif</span> <span class="n">state</span> <span class="o">==</span> <span class="n">celery_states</span><span class="o">.</span><span class="n">REVOKED</span><span class="p">:</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">fail</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
+ <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
+ <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_state</span><span class="p">[</span><span class="n">key</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">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Unexpected state: "</span> <span class="o">+</span> <span class="n">async</span><span class="o">.</span><span class="n">state</span><span class="p">)</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">last_state</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">async</span><span class="o">.</span><span class="n">state</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="n">synchronous</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
+ <span class="k">if</span> <span class="n">synchronous</span><span class="p">:</span>
+ <span class="k">while</span> <span class="nb">any</span><span class="p">([</span>
+ <span class="n">async</span><span class="o">.</span><span class="n">state</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">celery_states</span><span class="o">.</span><span class="n">READY_STATES</span>
+ <span class="k">for</span> <span class="n">async</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tasks</span><span class="o">.</span><span class="n">values</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">5</span><span class="p">)</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">sync</span><span class="p">()</span></div>
+</pre></div>
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+
+ <h1>Source code for airflow.executors.local_executor</h1><div class="highlight"><pre>
+<span></span><span class="kn">import</span> <span class="nn">multiprocessing</span>
+<span class="kn">import</span> <span class="nn">subprocess</span>
+<span class="kn">import</span> <span class="nn">time</span>
+
+<span class="kn">from</span> <span class="nn">builtins</span> <span class="kn">import</span> <span class="nb">range</span>
+
+<span class="kn">from</span> <span class="nn">airflow</span> <span class="kn">import</span> <span class="n">configuration</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>
+<span class="kn">from</span> <span class="nn">airflow.utils.logging</span> <span class="kn">import</span> <span class="n">LoggingMixin</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="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="n">__init__</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">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="bp">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="bp">True</span><span class="p">:</span>
+ <span class="n">key</span><span class="p">,</span> <span class="n">command</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">task_queue</span><span class="o">.</span><span class="n">get</span><span class="p">()</span>
+ <span class="k">if</span> <span class="n">key</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
+ <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">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"{} running {}"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__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 '{0}'"</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="bp">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">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"failed to execute task {}:"</span><span class="o">.</span><span class="n">format</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"># 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">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>
+ <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">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">i</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="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="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="bp">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">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="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="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="bp">None</span><span class="p">,</span> <span class="bp">None</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="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>
+</pre></div>
+
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----------------------------------------------------------------------
diff --git a/_modules/airflow/executors/sequential_executor.html b/_modules/airflow/executors/sequential_executor.html
new file mode 100644
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+
+ <h1>Source code for airflow.executors.sequential_executor</h1><div class="highlight"><pre>
+<span></span><span class="kn">from</span> <span class="nn">builtins</span> <span class="kn">import</span> <span class="nb">str</span>
+<span class="kn">import</span> <span class="nn">subprocess</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="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>
+ <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>
+<span class="sd"> since sqlite doesn't support multiple connections.</span>
+
+<span class="sd"> Since we want airflow to work out of the box, it defaults to this</span>
+<span class="sd"> SequentialExecutor alongside sqlite as you first install it.</span>
+<span class="sd"> """</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="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="n">__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="bp">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>
+ <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">command</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">commands_to_run</span><span class="p">:</span>
+ <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Executing command: {}"</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="bp">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>
+ <span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to execute task {}:"</span><span class="o">.</span><span class="n">format</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="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">end</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">heartbeat</span><span class="p">()</span></div>
+</pre></div>
+
+ </div>
+ </div>
+ <footer>
+
+
+ <hr/>
+
+ <div role="contentinfo">
+ <p>
+ © Copyright 2014, Maxime Beauchemin, Airbnb.
+
+ </p>
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+ <h1>Source code for airflow.macros</h1><div class="highlight"><pre>
+<span></span><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">absolute_import</span>
+<span class="kn">from</span> <span class="nn">random</span> <span class="kn">import</span> <span class="n">random</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">import</span> <span class="nn">dateutil</span>
+<span class="kn">import</span> <span class="nn">time</span>
+<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">hive</span>
+<span class="kn">import</span> <span class="nn">uuid</span>
+
+
+<div class="viewcode-block" id="ds_add"><a class="viewcode-back" href="../../code.html#airflow.macros.ds_add">[docs]</a><span class="k">def</span> <span class="nf">ds_add</span><span class="p">(</span><span class="n">ds</span><span class="p">,</span> <span class="n">days</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> Add or subtract days from a YYYY-MM-DD</span>
+
+<span class="sd"> :param ds: anchor date in ``YYYY-MM-DD`` format to add to</span>
+<span class="sd"> :type ds: str</span>
+<span class="sd"> :param days: number of days to add to the ds, you can use negative values</span>
+<span class="sd"> :type days: int</span>
+
+<span class="sd"> >>> ds_add('2015-01-01', 5)</span>
+<span class="sd"> '2015-01-06'</span>
+<span class="sd"> >>> ds_add('2015-01-06', -5)</span>
+<span class="sd"> '2015-01-01'</span>
+<span class="sd"> """</span>
+
+ <span class="n">ds</span> <span class="o">=</span> <span class="n">datetime</span><span class="o">.</span><span class="n">strptime</span><span class="p">(</span><span class="n">ds</span><span class="p">,</span> <span class="s1">'%Y-%m-</span><span class="si">%d</span><span class="s1">'</span><span class="p">)</span>
+ <span class="k">if</span> <span class="n">days</span><span class="p">:</span>
+ <span class="n">ds</span> <span class="o">=</span> <span class="n">ds</span> <span class="o">+</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">days</span><span class="p">)</span>
+ <span class="k">return</span> <span class="n">ds</span><span class="o">.</span><span class="n">isoformat</span><span class="p">()[:</span><span class="mi">10</span><span class="p">]</span></div>
+
+
+<div class="viewcode-block" id="ds_format"><a class="viewcode-back" href="../../code.html#airflow.macros.ds_format">[docs]</a><span class="k">def</span> <span class="nf">ds_format</span><span class="p">(</span><span class="n">ds</span><span class="p">,</span> <span class="n">input_format</span><span class="p">,</span> <span class="n">output_format</span><span class="p">):</span>
+ <span class="sd">"""</span>
+<span class="sd"> Takes an input string and outputs another string</span>
+<span class="sd"> as specified in the output format</span>
+
+<span class="sd"> :param ds: input string which contains a date</span>
+<span class="sd"> :type ds: str</span>
+<span class="sd"> :param input_format: input string format. E.g. %Y-%m-%d</span>
+<span class="sd"> :type input_format: str</span>
+<span class="sd"> :param output_format: output string format E.g. %Y-%m-%d</span>
+<span class="sd"> :type output_format: str</span>
+
+<span class="sd"> >>> ds_format('2015-01-01', "%Y-%m-%d", "%m-%d-%y")</span>
+<span class="sd"> '01-01-15'</span>
+<span class="sd"> >>> ds_format('1/5/2015', "%m/%d/%Y", "%Y-%m-%d")</span>
+<span class="sd"> '2015-01-05'</span>
+<span class="sd"> """</span>
+ <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">strptime</span><span class="p">(</span><span class="n">ds</span><span class="p">,</span> <span class="n">input_format</span><span class="p">)</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="n">output_format</span><span class="p">)</span></div>
+
+
+<div class="viewcode-block" id="integrate_plugins"><a class="viewcode-back" href="../../code.html#airflow.macros.integrate_plugins">[docs]</a><span class="k">def</span> <span class="nf">integrate_plugins</span><span class="p">():</span>
+ <span class="sd">"""Integrate plugins to the context"""</span>
+ <span class="kn">from</span> <span class="nn">airflow.plugins_manager</span> <span class="kn">import</span> <span class="n">macros</span> <span class="k">as</span> <span class="n">_macros</span>
+ <span class="k">for</span> <span class="n">_macro</span> <span class="ow">in</span> <span class="n">_macros</span><span class="p">:</span>
+ <span class="nb">globals</span><span class="p">()[</span><span class="n">_macro</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">_macro</span></div>
+</pre></div>
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