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<h1>Source code for airflow.contrib.operators.datastore_export_operator</h1><div class="highlight"><pre>
<span></span><span class="c1"># -*- coding: utf-8 -*-</span>
<span class="c1">#</span>
<span class="c1"># Licensed to the Apache Software Foundation (ASF) under one</span>
<span class="c1"># or more contributor license agreements. See the NOTICE file</span>
<span class="c1"># distributed with this work for additional information</span>
<span class="c1"># regarding copyright ownership. The ASF licenses this file</span>
<span class="c1"># to you under the Apache License, Version 2.0 (the</span>
<span class="c1"># &quot;License&quot;); you may not use this file except in compliance</span>
<span class="c1"># with the License. You may obtain a copy of the License at</span>
<span class="c1">#</span>
<span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="c1">#</span>
<span class="c1"># Unless required by applicable law or agreed to in writing,</span>
<span class="c1"># software distributed under the License is distributed on an</span>
<span class="c1"># &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span>
<span class="c1"># KIND, either express or implied. See the License for the</span>
<span class="c1"># specific language governing permissions and limitations</span>
<span class="c1"># under the License.</span>
<span class="c1">#</span>
<span class="kn">from</span> <span class="nn">airflow.contrib.hooks.datastore_hook</span> <span class="k">import</span> <span class="n">DatastoreHook</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.exceptions</span> <span class="k">import</span> <span class="n">AirflowException</span>
<span class="kn">from</span> <span class="nn">airflow.models</span> <span class="k">import</span> <span class="n">BaseOperator</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="DatastoreExportOperator"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/datastore_export_operator/index.html#airflow.contrib.operators.datastore_export_operator.DatastoreExportOperator">[docs]</a><span class="k">class</span> <span class="nc">DatastoreExportOperator</span><span class="p">(</span><span class="n">BaseOperator</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Export entities from Google Cloud Datastore to Cloud Storage</span>
<span class="sd"> :param bucket: name of the cloud storage bucket to backup data</span>
<span class="sd"> :type bucket: str</span>
<span class="sd"> :param namespace: optional namespace path in the specified Cloud Storage bucket</span>
<span class="sd"> to backup data. If this namespace does not exist in GCS, it will be created.</span>
<span class="sd"> :type namespace: str</span>
<span class="sd"> :param datastore_conn_id: the name of the Datastore connection id to use</span>
<span class="sd"> :type datastore_conn_id: str</span>
<span class="sd"> :param cloud_storage_conn_id: the name of the cloud storage connection id to</span>
<span class="sd"> force-write backup</span>
<span class="sd"> :type cloud_storage_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"> :param entity_filter: description of what data from the project is included in the</span>
<span class="sd"> export, refer to</span>
<span class="sd"> https://cloud.google.com/datastore/docs/reference/rest/Shared.Types/EntityFilter</span>
<span class="sd"> :type entity_filter: dict</span>
<span class="sd"> :param labels: client-assigned labels for cloud storage</span>
<span class="sd"> :type labels: dict</span>
<span class="sd"> :param polling_interval_in_seconds: number of seconds to wait before polling for</span>
<span class="sd"> execution status again</span>
<span class="sd"> :type polling_interval_in_seconds: int</span>
<span class="sd"> :param overwrite_existing: if the storage bucket + namespace is not empty, it will be</span>
<span class="sd"> emptied prior to exports. This enables overwriting existing backups.</span>
<span class="sd"> :type overwrite_existing: bool</span>
<span class="sd"> :param xcom_push: push operation name to xcom for reference</span>
<span class="sd"> :type xcom_push: bool</span>
<span class="sd"> &quot;&quot;&quot;</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">bucket</span><span class="p">,</span>
<span class="n">namespace</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">datastore_conn_id</span><span class="o">=</span><span class="s1">&#39;google_cloud_default&#39;</span><span class="p">,</span>
<span class="n">cloud_storage_conn_id</span><span class="o">=</span><span class="s1">&#39;google_cloud_default&#39;</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="n">entity_filter</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">labels</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">polling_interval_in_seconds</span><span class="o">=</span><span class="mi">10</span><span class="p">,</span>
<span class="n">overwrite_existing</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">xcom_push</span><span class="o">=</span><span class="kc">False</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">DatastoreExportOperator</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">datastore_conn_id</span> <span class="o">=</span> <span class="n">datastore_conn_id</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cloud_storage_conn_id</span> <span class="o">=</span> <span class="n">cloud_storage_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">bucket</span> <span class="o">=</span> <span class="n">bucket</span>
<span class="bp">self</span><span class="o">.</span><span class="n">namespace</span> <span class="o">=</span> <span class="n">namespace</span>
<span class="bp">self</span><span class="o">.</span><span class="n">entity_filter</span> <span class="o">=</span> <span class="n">entity_filter</span>
<span class="bp">self</span><span class="o">.</span><span class="n">labels</span> <span class="o">=</span> <span class="n">labels</span>
<span class="bp">self</span><span class="o">.</span><span class="n">polling_interval_in_seconds</span> <span class="o">=</span> <span class="n">polling_interval_in_seconds</span>
<span class="bp">self</span><span class="o">.</span><span class="n">overwrite_existing</span> <span class="o">=</span> <span class="n">overwrite_existing</span>
<span class="bp">self</span><span class="o">.</span><span class="n">xcom_push</span> <span class="o">=</span> <span class="n">xcom_push</span>
<div class="viewcode-block" id="DatastoreExportOperator.execute"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/datastore_export_operator/index.html#airflow.contrib.operators.datastore_export_operator.DatastoreExportOperator.execute">[docs]</a> <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">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">&#39;Exporting data to Cloud Storage bucket &#39;</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">overwrite_existing</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">namespace</span><span class="p">:</span>
<span class="n">gcs_hook</span> <span class="o">=</span> <span class="n">GoogleCloudStorageHook</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cloud_storage_conn_id</span><span class="p">)</span>
<span class="n">objects</span> <span class="o">=</span> <span class="n">gcs_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">namespace</span><span class="p">)</span>
<span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">objects</span><span class="p">:</span>
<span class="n">gcs_hook</span><span class="o">.</span><span class="n">delete</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">o</span><span class="p">)</span>
<span class="n">ds_hook</span> <span class="o">=</span> <span class="n">DatastoreHook</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">datastore_conn_id</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">delegate_to</span><span class="p">)</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">ds_hook</span><span class="o">.</span><span class="n">export_to_storage_bucket</span><span class="p">(</span><span class="n">bucket</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">bucket</span><span class="p">,</span>
<span class="n">namespace</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">namespace</span><span class="p">,</span>
<span class="n">entity_filter</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">entity_filter</span><span class="p">,</span>
<span class="n">labels</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">labels</span><span class="p">)</span>
<span class="n">operation_name</span> <span class="o">=</span> <span class="n">result</span><span class="p">[</span><span class="s1">&#39;name&#39;</span><span class="p">]</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">ds_hook</span><span class="o">.</span><span class="n">poll_operation_until_done</span><span class="p">(</span><span class="n">operation_name</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">polling_interval_in_seconds</span><span class="p">)</span>
<span class="n">state</span> <span class="o">=</span> <span class="n">result</span><span class="p">[</span><span class="s1">&#39;metadata&#39;</span><span class="p">][</span><span class="s1">&#39;common&#39;</span><span class="p">][</span><span class="s1">&#39;state&#39;</span><span class="p">]</span>
<span class="k">if</span> <span class="n">state</span> <span class="o">!=</span> <span class="s1">&#39;SUCCESSFUL&#39;</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">&#39;Operation failed: result=</span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">result</span><span class="p">))</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">xcom_push</span><span class="p">:</span>
<span class="k">return</span> <span class="n">result</span></div></div>
</pre></div>
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