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| <h1>Source code for airflow.contrib.sensors.gcs_sensor</h1><div class="highlight"><pre> |
| <span></span><span class="c1"># -*- coding: utf-8 -*-</span> |
| <span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="c1"># or more contributor license agreements. See the NOTICE file</span> |
| <span class="c1"># distributed with this work for additional information</span> |
| <span class="c1"># regarding copyright ownership. The ASF licenses this file</span> |
| <span class="c1"># to you under the Apache License, Version 2.0 (the</span> |
| <span class="c1"># "License"); you may not use this file except in compliance</span> |
| <span class="c1"># with the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing,</span> |
| <span class="c1"># software distributed under the License is distributed on an</span> |
| <span class="c1"># "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span> |
| <span class="c1"># KIND, either express or implied. See the License for the</span> |
| <span class="c1"># specific language governing permissions and limitations</span> |
| <span class="c1"># under the License.</span> |
| |
| <span class="kn">import</span> <span class="nn">os</span> |
| <span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">datetime</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.contrib.hooks.gcs_hook</span> <span class="k">import</span> <span class="n">GoogleCloudStorageHook</span> |
| <span class="kn">from</span> <span class="nn">airflow.sensors.base_sensor_operator</span> <span class="k">import</span> <span class="n">BaseSensorOperator</span> |
| <span class="kn">from</span> <span class="nn">airflow.utils.decorators</span> <span class="k">import</span> <span class="n">apply_defaults</span> |
| |
| |
| <div class="viewcode-block" id="GoogleCloudStorageObjectSensor"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectSensor">[docs]</a><span class="k">class</span> <span class="nc">GoogleCloudStorageObjectSensor</span><span class="p">(</span><span class="n">BaseSensorOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Checks for the existence of a file in Google Cloud Storage.</span> |
| |
| <span class="sd"> :param bucket: The Google cloud storage bucket where the object is.</span> |
| <span class="sd"> :type bucket: str</span> |
| <span class="sd"> :param object: The name of the object to check in the Google cloud</span> |
| <span class="sd"> storage bucket.</span> |
| <span class="sd"> :type object: str</span> |
| <span class="sd"> :param google_cloud_conn_id: The connection ID to use when</span> |
| <span class="sd"> connecting to Google cloud storage.</span> |
| <span class="sd"> :type google_cloud_conn_id: str</span> |
| <span class="sd"> :param delegate_to: The account to impersonate, if any.</span> |
| <span class="sd"> For this to work, the service account making the request must have</span> |
| <span class="sd"> domain-wide delegation enabled.</span> |
| <span class="sd"> :type delegate_to: str</span> |
| <span class="sd"> """</span> |
| <div class="viewcode-block" id="GoogleCloudStorageObjectSensor.template_fields"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectSensor.template_fields">[docs]</a> <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'bucket'</span><span class="p">,</span> <span class="s1">'object'</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="GoogleCloudStorageObjectSensor.ui_color"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectSensor.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#f0eee4'</span></div> |
| |
| <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">bucket</span><span class="p">,</span> |
| <span class="nb">object</span><span class="p">,</span> <span class="c1"># pylint:disable=redefined-builtin</span> |
| <span class="n">google_cloud_conn_id</span><span class="o">=</span><span class="s1">'google_cloud_default'</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="kc">None</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">GoogleCloudStorageObjectSensor</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="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">bucket</span> <span class="o">=</span> <span class="n">bucket</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">object</span> <span class="o">=</span> <span class="nb">object</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span> <span class="o">=</span> <span class="n">google_cloud_conn_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span> <span class="o">=</span> <span class="n">delegate_to</span> |
| |
| <div class="viewcode-block" id="GoogleCloudStorageObjectSensor.poke"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectSensor.poke">[docs]</a> <span class="k">def</span> <span class="nf">poke</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">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Sensor checks existence of : </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="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">object</span><span class="p">)</span> |
| <span class="n">hook</span> <span class="o">=</span> <span class="n">GoogleCloudStorageHook</span><span class="p">(</span> |
| <span class="n">google_cloud_storage_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">hook</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">object</span><span class="p">)</span></div></div> |
| |
| |
| <div class="viewcode-block" id="ts_function"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.ts_function">[docs]</a><span class="k">def</span> <span class="nf">ts_function</span><span class="p">(</span><span class="n">context</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Default callback for the GoogleCloudStorageObjectUpdatedSensor. The default</span> |
| <span class="sd"> behaviour is check for the object being updated after execution_date +</span> |
| <span class="sd"> schedule_interval.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="n">context</span><span class="p">[</span><span class="s1">'dag'</span><span class="p">]</span><span class="o">.</span><span class="n">following_schedule</span><span class="p">(</span><span class="n">context</span><span class="p">[</span><span class="s1">'execution_date'</span><span class="p">])</span></div> |
| |
| |
| <div class="viewcode-block" id="GoogleCloudStorageObjectUpdatedSensor"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectUpdatedSensor">[docs]</a><span class="k">class</span> <span class="nc">GoogleCloudStorageObjectUpdatedSensor</span><span class="p">(</span><span class="n">BaseSensorOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Checks if an object is updated in Google Cloud Storage.</span> |
| |
| <span class="sd"> :param bucket: The Google cloud storage bucket where the object is.</span> |
| <span class="sd"> :type bucket: str</span> |
| <span class="sd"> :param object: The name of the object to download in the Google cloud</span> |
| <span class="sd"> storage bucket.</span> |
| <span class="sd"> :type object: str</span> |
| <span class="sd"> :param ts_func: Callback for defining the update condition. The default callback</span> |
| <span class="sd"> returns execution_date + schedule_interval. The callback takes the context</span> |
| <span class="sd"> as parameter.</span> |
| <span class="sd"> :type ts_func: function</span> |
| <span class="sd"> :param google_cloud_conn_id: The connection ID to use when</span> |
| <span class="sd"> connecting to Google cloud storage.</span> |
| <span class="sd"> :type google_cloud_conn_id: str</span> |
| <span class="sd"> :param delegate_to: The account to impersonate, if any.</span> |
| <span class="sd"> For this to work, the service account making the request must have domain-wide</span> |
| <span class="sd"> delegation enabled.</span> |
| <span class="sd"> :type delegate_to: str</span> |
| <span class="sd"> """</span> |
| <div class="viewcode-block" id="GoogleCloudStorageObjectUpdatedSensor.template_fields"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectUpdatedSensor.template_fields">[docs]</a> <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'bucket'</span><span class="p">,</span> <span class="s1">'object'</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="GoogleCloudStorageObjectUpdatedSensor.ui_color"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectUpdatedSensor.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#f0eee4'</span></div> |
| |
| <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">bucket</span><span class="p">,</span> |
| <span class="nb">object</span><span class="p">,</span> <span class="c1"># pylint:disable=redefined-builtin</span> |
| <span class="n">ts_func</span><span class="o">=</span><span class="n">ts_function</span><span class="p">,</span> |
| <span class="n">google_cloud_conn_id</span><span class="o">=</span><span class="s1">'google_cloud_default'</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="kc">None</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">GoogleCloudStorageObjectUpdatedSensor</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="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">bucket</span> <span class="o">=</span> <span class="n">bucket</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">object</span> <span class="o">=</span> <span class="nb">object</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">ts_func</span> <span class="o">=</span> <span class="n">ts_func</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span> <span class="o">=</span> <span class="n">google_cloud_conn_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span> <span class="o">=</span> <span class="n">delegate_to</span> |
| |
| <div class="viewcode-block" id="GoogleCloudStorageObjectUpdatedSensor.poke"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectUpdatedSensor.poke">[docs]</a> <span class="k">def</span> <span class="nf">poke</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">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Sensor checks existence of : </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="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">object</span><span class="p">)</span> |
| <span class="n">hook</span> <span class="o">=</span> <span class="n">GoogleCloudStorageHook</span><span class="p">(</span> |
| <span class="n">google_cloud_storage_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">hook</span><span class="o">.</span><span class="n">is_updated_after</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">object</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">ts_func</span><span class="p">(</span><span class="n">context</span><span class="p">))</span></div></div> |
| |
| |
| <div class="viewcode-block" id="GoogleCloudStoragePrefixSensor"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStoragePrefixSensor">[docs]</a><span class="k">class</span> <span class="nc">GoogleCloudStoragePrefixSensor</span><span class="p">(</span><span class="n">BaseSensorOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Checks for the existence of a objects at prefix in Google Cloud Storage bucket.</span> |
| |
| <span class="sd"> :param bucket: The Google cloud storage bucket where the object is.</span> |
| <span class="sd"> :type bucket: str</span> |
| <span class="sd"> :param prefix: The name of the prefix to check in the Google cloud</span> |
| <span class="sd"> storage bucket.</span> |
| <span class="sd"> :type prefix: str</span> |
| <span class="sd"> :param google_cloud_conn_id: The connection ID to use when</span> |
| <span class="sd"> connecting to Google cloud storage.</span> |
| <span class="sd"> :type google_cloud_conn_id: str</span> |
| <span class="sd"> :param delegate_to: The account to impersonate, if any.</span> |
| <span class="sd"> For this to work, the service account making the request must have</span> |
| <span class="sd"> domain-wide delegation enabled.</span> |
| <span class="sd"> :type delegate_to: str</span> |
| <span class="sd"> """</span> |
| <div class="viewcode-block" id="GoogleCloudStoragePrefixSensor.template_fields"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStoragePrefixSensor.template_fields">[docs]</a> <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'bucket'</span><span class="p">,</span> <span class="s1">'prefix'</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="GoogleCloudStoragePrefixSensor.ui_color"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStoragePrefixSensor.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#f0eee4'</span></div> |
| |
| <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">bucket</span><span class="p">,</span> |
| <span class="n">prefix</span><span class="p">,</span> |
| <span class="n">google_cloud_conn_id</span><span class="o">=</span><span class="s1">'google_cloud_default'</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="kc">None</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">GoogleCloudStoragePrefixSensor</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="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">bucket</span> <span class="o">=</span> <span class="n">bucket</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span> <span class="o">=</span> <span class="n">prefix</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span> <span class="o">=</span> <span class="n">google_cloud_conn_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span> <span class="o">=</span> <span class="n">delegate_to</span> |
| |
| <div class="viewcode-block" id="GoogleCloudStoragePrefixSensor.poke"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStoragePrefixSensor.poke">[docs]</a> <span class="k">def</span> <span class="nf">poke</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">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'Sensor checks existence of objects: </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="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">)</span> |
| <span class="n">hook</span> <span class="o">=</span> <span class="n">GoogleCloudStorageHook</span><span class="p">(</span> |
| <span class="n">google_cloud_storage_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span><span class="p">)</span> |
| <span class="k">return</span> <span class="nb">bool</span><span class="p">(</span><span class="n">hook</span><span class="o">.</span><span class="n">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="n">prefix</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">))</span></div></div> |
| |
| |
| <div class="viewcode-block" id="get_time"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.get_time">[docs]</a><span class="k">def</span> <span class="nf">get_time</span><span class="p">():</span> |
| <span class="sd">"""</span> |
| <span class="sd"> This is just a wrapper of datetime.datetime.now to simplify mocking in the</span> |
| <span class="sd"> unittests.</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="n">datetime</span><span class="o">.</span><span class="n">now</span><span class="p">()</span></div> |
| |
| |
| <div class="viewcode-block" id="GoogleCloudStorageUploadSessionCompleteSensor"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageUploadSessionCompleteSensor">[docs]</a><span class="k">class</span> <span class="nc">GoogleCloudStorageUploadSessionCompleteSensor</span><span class="p">(</span><span class="n">BaseSensorOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Checks for changes in the number of objects at prefix in Google Cloud Storage</span> |
| <span class="sd"> bucket and returns True if the inactivity period has passed with no</span> |
| <span class="sd"> increase in the number of objects. Note, it is recommended to use reschedule</span> |
| <span class="sd"> mode if you expect this sensor to run for hours.</span> |
| |
| <span class="sd"> :param bucket: The Google cloud storage bucket where the objects are.</span> |
| <span class="sd"> expected.</span> |
| <span class="sd"> :type bucket: str</span> |
| <span class="sd"> :param prefix: The name of the prefix to check in the Google cloud</span> |
| <span class="sd"> storage bucket.</span> |
| <span class="sd"> :param inactivity_period: The total seconds of inactivity to designate</span> |
| <span class="sd"> an upload session is over. Note, this mechanism is not real time and</span> |
| <span class="sd"> this operator may not return until a poke_interval after this period</span> |
| <span class="sd"> has passed with no additional objects sensed.</span> |
| <span class="sd"> :type inactivity_period: int</span> |
| <span class="sd"> :param min_objects: The minimum number of objects needed for upload session</span> |
| <span class="sd"> to be considered valid.</span> |
| <span class="sd"> :type min_objects: int</span> |
| <span class="sd"> :param previous_num_objects: The number of objects found during the last poke.</span> |
| <span class="sd"> :type previous_num_objects: int</span> |
| <span class="sd"> :param inactivity_seconds: The current seconds of the inactivity period.</span> |
| <span class="sd"> :type inactivity_seconds: int</span> |
| <span class="sd"> :param allow_delete: Should this sensor consider objects being deleted</span> |
| <span class="sd"> between pokes valid behavior. If true a warning message will be logged</span> |
| <span class="sd"> when this happens. If false an error will be raised.</span> |
| <span class="sd"> :type allow_delete: bool</span> |
| <span class="sd"> :param google_cloud_conn_id: The connection ID to use when connecting</span> |
| <span class="sd"> to Google cloud storage.</span> |
| <span class="sd"> :type google_cloud_conn_id: str</span> |
| <span class="sd"> :param delegate_to: The account to impersonate, if any. For this to work,</span> |
| <span class="sd"> the service account making the request must have domain-wide</span> |
| <span class="sd"> delegation enabled.</span> |
| <span class="sd"> :type delegate_to: str</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="GoogleCloudStorageUploadSessionCompleteSensor.template_fields"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageUploadSessionCompleteSensor.template_fields">[docs]</a> <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'bucket'</span><span class="p">,</span> <span class="s1">'prefix'</span><span class="p">)</span></div> |
| <div class="viewcode-block" id="GoogleCloudStorageUploadSessionCompleteSensor.ui_color"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageUploadSessionCompleteSensor.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#f0eee4'</span></div> |
| |
| <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">bucket</span><span class="p">,</span> |
| <span class="n">prefix</span><span class="p">,</span> |
| <span class="n">inactivity_period</span><span class="o">=</span><span class="mi">60</span> <span class="o">*</span> <span class="mi">60</span><span class="p">,</span> |
| <span class="n">min_objects</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> |
| <span class="n">previous_num_objects</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> |
| <span class="n">allow_delete</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> |
| <span class="n">google_cloud_conn_id</span><span class="o">=</span><span class="s1">'google_cloud_default'</span><span class="p">,</span> |
| <span class="n">delegate_to</span><span class="o">=</span><span class="kc">None</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">GoogleCloudStorageUploadSessionCompleteSensor</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="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">bucket</span> <span class="o">=</span> <span class="n">bucket</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span> <span class="o">=</span> <span class="n">prefix</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_period</span> <span class="o">=</span> <span class="n">inactivity_period</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">min_objects</span> <span class="o">=</span> <span class="n">min_objects</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">previous_num_objects</span> <span class="o">=</span> <span class="n">previous_num_objects</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_seconds</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">allow_delete</span> <span class="o">=</span> <span class="n">allow_delete</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_conn_id</span> <span class="o">=</span> <span class="n">google_cloud_conn_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span> <span class="o">=</span> <span class="n">delegate_to</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">last_activity_time</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <div class="viewcode-block" id="GoogleCloudStorageUploadSessionCompleteSensor.is_bucket_updated"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageUploadSessionCompleteSensor.is_bucket_updated">[docs]</a> <span class="k">def</span> <span class="nf">is_bucket_updated</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_num_objects</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Checks whether new objects have been uploaded and the inactivity_period</span> |
| <span class="sd"> has passed and updates the state of the sensor accordingly.</span> |
| |
| <span class="sd"> :param current_num_objects: number of objects in bucket during last poke.</span> |
| <span class="sd"> :type current_num_objects: int</span> |
| <span class="sd"> """</span> |
| |
| <span class="k">if</span> <span class="n">current_num_objects</span> <span class="o">></span> <span class="bp">self</span><span class="o">.</span><span class="n">previous_num_objects</span><span class="p">:</span> |
| <span class="c1"># When new objects arrived, reset the inactivity_seconds</span> |
| <span class="c1"># previous_num_objects for the next poke.</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="sd">'''</span> |
| <span class="sd"> New objects found at {} resetting last_activity_time.</span> |
| <span class="sd"> '''</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</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">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">)))</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">last_activity_time</span> <span class="o">=</span> <span class="n">get_time</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_seconds</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">previous_num_objects</span> <span class="o">=</span> <span class="n">current_num_objects</span> |
| <span class="k">elif</span> <span class="n">current_num_objects</span> <span class="o"><</span> <span class="bp">self</span><span class="o">.</span><span class="n">previous_num_objects</span><span class="p">:</span> |
| <span class="c1"># During the last poke interval objects were deleted.</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">allow_delete</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">previous_num_objects</span> <span class="o">=</span> <span class="n">current_num_objects</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">last_activity_time</span> <span class="o">=</span> <span class="n">get_time</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span> |
| <span class="sd">'''</span> |
| <span class="sd"> Objects were deleted during the last</span> |
| <span class="sd"> poke interval. Updating the file counter and</span> |
| <span class="sd"> resetting last_activity_time.</span> |
| <span class="sd"> '''</span> |
| <span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span> |
| <span class="sd">'''</span> |
| <span class="sd"> Illegal behavior: objects were deleted in {} between pokes.</span> |
| <span class="sd"> '''</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</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">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">))</span> |
| <span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_activity_time</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_seconds</span> <span class="o">=</span> <span class="p">(</span> |
| <span class="n">get_time</span><span class="p">()</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_activity_time</span><span class="p">)</span><span class="o">.</span><span class="n">total_seconds</span><span class="p">()</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># Handles the first poke where last inactivity time is None.</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">last_activity_time</span> <span class="o">=</span> <span class="n">get_time</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_seconds</span> <span class="o">=</span> <span class="mi">0</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_seconds</span> <span class="o">>=</span> <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_period</span><span class="p">:</span> |
| <span class="k">if</span> <span class="n">current_num_objects</span> <span class="o">>=</span> <span class="bp">self</span><span class="o">.</span><span class="n">min_objects</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> |
| <span class="sd">'''</span> |
| <span class="sd"> SUCCESS:</span> |
| <span class="sd"> Sensor found {} objects at {}.</span> |
| <span class="sd"> Waited at least {} seconds, with no new objects dropped.</span> |
| <span class="sd"> '''</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">current_num_objects</span><span class="p">,</span> |
| <span class="n">os</span><span class="o">.</span><span class="n">path</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">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">),</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">inactivity_period</span><span class="p">))</span> |
| <span class="k">return</span> <span class="kc">True</span> |
| |
| <span class="n">warn_msg</span> <span class="o">=</span> \ |
| <span class="sd">'''</span> |
| <span class="sd"> FAILURE:</span> |
| <span class="sd"> Inactivity Period passed,</span> |
| <span class="sd"> not enough objects found in {}</span> |
| <span class="sd"> '''</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">os</span><span class="o">.</span><span class="n">path</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">bucket</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">))</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="n">warn_msg</span><span class="p">)</span> |
| <span class="k">return</span> <span class="kc">False</span> |
| <span class="k">return</span> <span class="kc">False</span></div> |
| |
| <div class="viewcode-block" id="GoogleCloudStorageUploadSessionCompleteSensor.poke"><a class="viewcode-back" href="../../../../_api/airflow/contrib/sensors/gcs_sensor/index.html#airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageUploadSessionCompleteSensor.poke">[docs]</a> <span class="k">def</span> <span class="nf">poke</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="n">hook</span> <span class="o">=</span> <span class="n">GoogleCloudStorageHook</span><span class="p">()</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_bucket_updated</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">hook</span><span class="o">.</span><span class="n">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span> <span class="n">prefix</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">prefix</span><span class="p">)))</span></div></div> |
| </pre></div> |
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