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| <h1>Source code for airflow.contrib.operators.hive_to_dynamodb</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">json</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.contrib.hooks.aws_dynamodb_hook</span> <span class="k">import</span> <span class="n">AwsDynamoDBHook</span> |
| <span class="kn">from</span> <span class="nn">airflow.hooks.hive_hooks</span> <span class="k">import</span> <span class="n">HiveServer2Hook</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="HiveToDynamoDBTransferOperator"><a class="viewcode-back" href="../../../../code.html#airflow.contrib.operators.hive_to_dynamodb.HiveToDynamoDBTransferOperator">[docs]</a><span class="k">class</span> <span class="nc">HiveToDynamoDBTransferOperator</span><span class="p">(</span><span class="n">BaseOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Moves data from Hive to DynamoDB, note that for now the data is loaded</span> |
| <span class="sd"> into memory before being pushed to DynamoDB, so this operator should</span> |
| <span class="sd"> be used for smallish amount of data.</span> |
| |
| <span class="sd"> :param sql: SQL query to execute against the hive database. (templated)</span> |
| <span class="sd"> :type sql: str</span> |
| <span class="sd"> :param table_name: target DynamoDB table</span> |
| <span class="sd"> :type table_name: str</span> |
| <span class="sd"> :param table_keys: partition key and sort key</span> |
| <span class="sd"> :type table_keys: list</span> |
| <span class="sd"> :param pre_process: implement pre-processing of source data</span> |
| <span class="sd"> :type pre_process: function</span> |
| <span class="sd"> :param pre_process_args: list of pre_process function arguments</span> |
| <span class="sd"> :type pre_process_args: list</span> |
| <span class="sd"> :param pre_process_kwargs: dict of pre_process function arguments</span> |
| <span class="sd"> :type pre_process_kwargs: dict</span> |
| <span class="sd"> :param region_name: aws region name (example: us-east-1)</span> |
| <span class="sd"> :type region_name: str</span> |
| <span class="sd"> :param schema: hive database schema</span> |
| <span class="sd"> :type schema: str</span> |
| <span class="sd"> :param hiveserver2_conn_id: source hive connection</span> |
| <span class="sd"> :type hiveserver2_conn_id: str</span> |
| <span class="sd"> :param aws_conn_id: aws connection</span> |
| <span class="sd"> :type aws_conn_id: str</span> |
| <span class="sd"> """</span> |
| |
| <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'sql'</span><span class="p">,)</span> |
| <span class="n">template_ext</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'.sql'</span><span class="p">,)</span> |
| <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#a0e08c'</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">sql</span><span class="p">,</span> |
| <span class="n">table_name</span><span class="p">,</span> |
| <span class="n">table_keys</span><span class="p">,</span> |
| <span class="n">pre_process</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">pre_process_args</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">pre_process_kwargs</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">region_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">schema</span><span class="o">=</span><span class="s1">'default'</span><span class="p">,</span> |
| <span class="n">hiveserver2_conn_id</span><span class="o">=</span><span class="s1">'hiveserver2_default'</span><span class="p">,</span> |
| <span class="n">aws_conn_id</span><span class="o">=</span><span class="s1">'aws_default'</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">HiveToDynamoDBTransferOperator</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">sql</span> <span class="o">=</span> <span class="n">sql</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">table_name</span> <span class="o">=</span> <span class="n">table_name</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">table_keys</span> <span class="o">=</span> <span class="n">table_keys</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pre_process</span> <span class="o">=</span> <span class="n">pre_process</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pre_process_args</span> <span class="o">=</span> <span class="n">pre_process_args</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pre_process_kwargs</span> <span class="o">=</span> <span class="n">pre_process_kwargs</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">region_name</span> <span class="o">=</span> <span class="n">region_name</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">schema</span> <span class="o">=</span> <span class="n">schema</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hiveserver2_conn_id</span> <span class="o">=</span> <span class="n">hiveserver2_conn_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">aws_conn_id</span> <span class="o">=</span> <span class="n">aws_conn_id</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="n">hive</span> <span class="o">=</span> <span class="n">HiveServer2Hook</span><span class="p">(</span><span class="n">hiveserver2_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">hiveserver2_conn_id</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">'Extracting data from Hive'</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="bp">self</span><span class="o">.</span><span class="n">sql</span><span class="p">)</span> |
| |
| <span class="n">data</span> <span class="o">=</span> <span class="n">hive</span><span class="o">.</span><span class="n">get_pandas_df</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sql</span><span class="p">,</span> <span class="n">schema</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">schema</span><span class="p">)</span> |
| <span class="n">dynamodb</span> <span class="o">=</span> <span class="n">AwsDynamoDBHook</span><span class="p">(</span><span class="n">aws_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">aws_conn_id</span><span class="p">,</span> |
| <span class="n">table_name</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">table_name</span><span class="p">,</span> |
| <span class="n">table_keys</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">table_keys</span><span class="p">,</span> |
| <span class="n">region_name</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">region_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="s1">'Inserting rows into dynamodb'</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">pre_process</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">dynamodb</span><span class="o">.</span><span class="n">write_batch_data</span><span class="p">(</span> |
| <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">data</span><span class="o">.</span><span class="n">to_json</span><span class="p">(</span><span class="n">orient</span><span class="o">=</span><span class="s1">'records'</span><span class="p">)))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">dynamodb</span><span class="o">.</span><span class="n">write_batch_data</span><span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pre_process</span><span class="p">(</span><span class="n">data</span><span class="o">=</span><span class="n">data</span><span class="p">,</span> |
| <span class="n">args</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">pre_process_args</span><span class="p">,</span> |
| <span class="n">kwargs</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">pre_process_kwargs</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">'Done.'</span><span class="p">)</span></div> |
| </pre></div> |
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