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<h1>Source code for airflow.contrib.operators.adls_to_gcs</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="kn">import</span> <span class="nn">os</span>
<span class="kn">from</span> <span class="nn">tempfile</span> <span class="k">import</span> <span class="n">NamedTemporaryFile</span>
<span class="kn">from</span> <span class="nn">airflow.contrib.hooks.azure_data_lake_hook</span> <span class="k">import</span> <span class="n">AzureDataLakeHook</span>
<span class="kn">from</span> <span class="nn">airflow.contrib.operators.adls_list_operator</span> <span class="k">import</span> <span class="n">AzureDataLakeStorageListOperator</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="p">,</span> <span class="n">_parse_gcs_url</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="AdlsToGoogleCloudStorageOperator"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/adls_to_gcs/index.html#airflow.contrib.operators.adls_to_gcs.AdlsToGoogleCloudStorageOperator">[docs]</a><span class="k">class</span> <span class="nc">AdlsToGoogleCloudStorageOperator</span><span class="p">(</span><span class="n">AzureDataLakeStorageListOperator</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Synchronizes an Azure Data Lake Storage path with a GCS bucket</span>
<span class="sd"> :param src_adls: The Azure Data Lake path to find the objects (templated)</span>
<span class="sd"> :type src_adls: str</span>
<span class="sd"> :param dest_gcs: The Google Cloud Storage bucket and prefix to</span>
<span class="sd"> store the objects. (templated)</span>
<span class="sd"> :type dest_gcs: str</span>
<span class="sd"> :param replace: If true, replaces same-named files in GCS</span>
<span class="sd"> :type replace: bool</span>
<span class="sd"> :param azure_data_lake_conn_id: The connection ID to use when</span>
<span class="sd"> connecting to Azure Data Lake Storage.</span>
<span class="sd"> :type azure_data_lake_conn_id: str</span>
<span class="sd"> :param google_cloud_storage_conn_id: The connection ID to use when</span>
<span class="sd"> connecting to Google Cloud Storage.</span>
<span class="sd"> :type google_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</span>
<span class="sd"> domain-wide delegation enabled.</span>
<span class="sd"> :type delegate_to: str</span>
<span class="sd"> **Examples**:</span>
<span class="sd"> The following Operator would copy a single file named</span>
<span class="sd"> ``hello/world.avro`` from ADLS to the GCS bucket ``mybucket``. Its full</span>
<span class="sd"> resulting gcs path will be ``gs://mybucket/hello/world.avro`` ::</span>
<span class="sd"> copy_single_file = AdlsToGoogleCloudStorageOperator(</span>
<span class="sd"> task_id=&#39;copy_single_file&#39;,</span>
<span class="sd"> src_adls=&#39;hello/world.avro&#39;,</span>
<span class="sd"> dest_gcs=&#39;gs://mybucket&#39;,</span>
<span class="sd"> replace=False,</span>
<span class="sd"> azure_data_lake_conn_id=&#39;azure_data_lake_default&#39;,</span>
<span class="sd"> google_cloud_storage_conn_id=&#39;google_cloud_default&#39;</span>
<span class="sd"> )</span>
<span class="sd"> The following Operator would copy all parquet files from ADLS</span>
<span class="sd"> to the GCS bucket ``mybucket``. ::</span>
<span class="sd"> copy_all_files = AdlsToGoogleCloudStorageOperator(</span>
<span class="sd"> task_id=&#39;copy_all_files&#39;,</span>
<span class="sd"> src_adls=&#39;*.parquet&#39;,</span>
<span class="sd"> dest_gcs=&#39;gs://mybucket&#39;,</span>
<span class="sd"> replace=False,</span>
<span class="sd"> azure_data_lake_conn_id=&#39;azure_data_lake_default&#39;,</span>
<span class="sd"> google_cloud_storage_conn_id=&#39;google_cloud_default&#39;</span>
<span class="sd"> )</span>
<span class="sd"> The following Operator would copy all parquet files from ADLS</span>
<span class="sd"> path ``/hello/world``to the GCS bucket ``mybucket``. ::</span>
<span class="sd"> copy_world_files = AdlsToGoogleCloudStorageOperator(</span>
<span class="sd"> task_id=&#39;copy_world_files&#39;,</span>
<span class="sd"> src_adls=&#39;hello/world/*.parquet&#39;,</span>
<span class="sd"> dest_gcs=&#39;gs://mybucket&#39;,</span>
<span class="sd"> replace=False,</span>
<span class="sd"> azure_data_lake_conn_id=&#39;azure_data_lake_default&#39;,</span>
<span class="sd"> google_cloud_storage_conn_id=&#39;google_cloud_default&#39;</span>
<span class="sd"> )</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="AdlsToGoogleCloudStorageOperator.template_fields"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/adls_to_gcs/index.html#airflow.contrib.operators.adls_to_gcs.AdlsToGoogleCloudStorageOperator.template_fields">[docs]</a> <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;src_adls&#39;</span><span class="p">,</span> <span class="s1">&#39;dest_gcs&#39;</span><span class="p">)</span></div>
<div class="viewcode-block" id="AdlsToGoogleCloudStorageOperator.ui_color"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/adls_to_gcs/index.html#airflow.contrib.operators.adls_to_gcs.AdlsToGoogleCloudStorageOperator.ui_color">[docs]</a> <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">&#39;#f0eee4&#39;</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">src_adls</span><span class="p">,</span>
<span class="n">dest_gcs</span><span class="p">,</span>
<span class="n">azure_data_lake_conn_id</span><span class="p">,</span>
<span class="n">google_cloud_storage_conn_id</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">replace</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">AdlsToGoogleCloudStorageOperator</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
<span class="n">path</span><span class="o">=</span><span class="n">src_adls</span><span class="p">,</span>
<span class="n">azure_data_lake_conn_id</span><span class="o">=</span><span class="n">azure_data_lake_conn_id</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">src_adls</span> <span class="o">=</span> <span class="n">src_adls</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dest_gcs</span> <span class="o">=</span> <span class="n">dest_gcs</span>
<span class="bp">self</span><span class="o">.</span><span class="n">replace</span> <span class="o">=</span> <span class="n">replace</span>
<span class="bp">self</span><span class="o">.</span><span class="n">google_cloud_storage_conn_id</span> <span class="o">=</span> <span class="n">google_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>
<div class="viewcode-block" id="AdlsToGoogleCloudStorageOperator.execute"><a class="viewcode-back" href="../../../../_api/airflow/contrib/operators/adls_to_gcs/index.html#airflow.contrib.operators.adls_to_gcs.AdlsToGoogleCloudStorageOperator.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="c1"># use the super to list all files in an Azure Data Lake path</span>
<span class="n">files</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">AdlsToGoogleCloudStorageOperator</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">context</span><span class="p">)</span>
<span class="n">g_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_storage_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">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">replace</span><span class="p">:</span>
<span class="c1"># if we are not replacing -&gt; list all files in the ADLS path</span>
<span class="c1"># and only keep those files which are present in</span>
<span class="c1"># ADLS and not in Google Cloud Storage</span>
<span class="n">bucket_name</span><span class="p">,</span> <span class="n">prefix</span> <span class="o">=</span> <span class="n">_parse_gcs_url</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dest_gcs</span><span class="p">)</span>
<span class="n">existing_files</span> <span class="o">=</span> <span class="n">g_hook</span><span class="o">.</span><span class="n">list</span><span class="p">(</span><span class="n">bucket</span><span class="o">=</span><span class="n">bucket_name</span><span class="p">,</span> <span class="n">prefix</span><span class="o">=</span><span class="n">prefix</span><span class="p">)</span>
<span class="n">files</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">files</span><span class="p">)</span> <span class="o">-</span> <span class="nb">set</span><span class="p">(</span><span class="n">existing_files</span><span class="p">)</span>
<span class="k">if</span> <span class="n">files</span><span class="p">:</span>
<span class="n">hook</span> <span class="o">=</span> <span class="n">AzureDataLakeHook</span><span class="p">(</span>
<span class="n">azure_data_lake_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">azure_data_lake_conn_id</span>
<span class="p">)</span>
<span class="k">for</span> <span class="n">obj</span> <span class="ow">in</span> <span class="n">files</span><span class="p">:</span>
<span class="k">with</span> <span class="n">NamedTemporaryFile</span><span class="p">(</span><span class="n">mode</span><span class="o">=</span><span class="s1">&#39;wb&#39;</span><span class="p">,</span> <span class="n">delete</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="n">hook</span><span class="o">.</span><span class="n">download_file</span><span class="p">(</span><span class="n">local_path</span><span class="o">=</span><span class="n">f</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">remote_path</span><span class="o">=</span><span class="n">obj</span><span class="p">)</span>
<span class="n">f</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span>
<span class="n">dest_gcs_bucket</span><span class="p">,</span> <span class="n">dest_gcs_prefix</span> <span class="o">=</span> <span class="n">_parse_gcs_url</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dest_gcs</span><span class="p">)</span>
<span class="n">dest_path</span> <span class="o">=</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="n">dest_gcs_prefix</span><span class="p">,</span> <span class="n">obj</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;Saving file to </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">dest_path</span><span class="p">)</span>
<span class="n">g_hook</span><span class="o">.</span><span class="n">upload</span><span class="p">(</span><span class="n">bucket</span><span class="o">=</span><span class="n">dest_gcs_bucket</span><span class="p">,</span> <span class="nb">object</span><span class="o">=</span><span class="n">dest_path</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="n">f</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;All done, uploaded </span><span class="si">%d</span><span class="s2"> files to GCS&quot;</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">files</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">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">&quot;In sync, no files needed to be uploaded to GCS&quot;</span><span class="p">)</span>
<span class="k">return</span> <span class="n">files</span></div></div>
</pre></div>
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