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| <h1>Source code for airflow.sensors.named_hive_partition_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">from</span> <span class="nn">past.builtins</span> <span class="k">import</span> <span class="n">basestring</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="NamedHivePartitionSensor"><a class="viewcode-back" href="../../../code.html#airflow.sensors.named_hive_partition_sensor.NamedHivePartitionSensor">[docs]</a><span class="k">class</span> <span class="nc">NamedHivePartitionSensor</span><span class="p">(</span><span class="n">BaseSensorOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Waits for a set of partitions to show up in Hive.</span> |
| |
| <span class="sd"> :param partition_names: List of fully qualified names of the</span> |
| <span class="sd"> partitions to wait for. A fully qualified name is of the</span> |
| <span class="sd"> form ``schema.table/pk1=pv1/pk2=pv2``, for example,</span> |
| <span class="sd"> default.users/ds=2016-01-01. This is passed as is to the metastore</span> |
| <span class="sd"> Thrift client ``get_partitions_by_name`` method. Note that</span> |
| <span class="sd"> you cannot use logical or comparison operators as in</span> |
| <span class="sd"> HivePartitionSensor.</span> |
| <span class="sd"> :type partition_names: list of strings</span> |
| <span class="sd"> :param metastore_conn_id: reference to the metastore thrift service</span> |
| <span class="sd"> connection id</span> |
| <span class="sd"> :type metastore_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">'partition_names'</span><span class="p">,)</span> |
| <span class="n">ui_color</span> <span class="o">=</span> <span class="s1">'#8d99ae'</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">partition_names</span><span class="p">,</span> |
| <span class="n">metastore_conn_id</span><span class="o">=</span><span class="s1">'metastore_default'</span><span class="p">,</span> |
| <span class="n">poke_interval</span><span class="o">=</span><span class="mi">60</span> <span class="o">*</span> <span class="mi">3</span><span class="p">,</span> |
| <span class="n">hook</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">NamedHivePartitionSensor</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">poke_interval</span><span class="o">=</span><span class="n">poke_interval</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="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">partition_names</span><span class="p">,</span> <span class="n">basestring</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'partition_names must be an array of strings'</span><span class="p">)</span> |
| |
| <span class="bp">self</span><span class="o">.</span><span class="n">metastore_conn_id</span> <span class="o">=</span> <span class="n">metastore_conn_id</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">partition_names</span> <span class="o">=</span> <span class="n">partition_names</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span> <span class="o">=</span> <span class="n">hook</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">hook</span> <span class="ow">and</span> <span class="n">metastore_conn_id</span> <span class="o">!=</span> <span class="s1">'metastore_default'</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="s1">'A hook was passed but a non default'</span> |
| <span class="s1">'metastore_conn_id='</span> |
| <span class="s1">'</span><span class="si">{}</span><span class="s1"> was used'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">metastore_conn_id</span><span class="p">))</span> |
| |
| <span class="nd">@staticmethod</span> |
| <span class="k">def</span> <span class="nf">parse_partition_name</span><span class="p">(</span><span class="n">partition</span><span class="p">):</span> |
| <span class="n">first_split</span> <span class="o">=</span> <span class="n">partition</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">first_split</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> |
| <span class="n">schema</span> <span class="o">=</span> <span class="s1">'default'</span> |
| <span class="n">table_partition</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">first_split</span><span class="p">)</span> <span class="c1"># poor man first</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">schema</span><span class="p">,</span> <span class="n">table_partition</span> <span class="o">=</span> <span class="n">first_split</span> |
| <span class="n">second_split</span> <span class="o">=</span> <span class="n">table_partition</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'/'</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> |
| <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">second_split</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Could not parse '</span> <span class="o">+</span> <span class="n">partition</span> <span class="o">+</span> |
| <span class="s1">'into table, partition'</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">table</span><span class="p">,</span> <span class="n">partition</span> <span class="o">=</span> <span class="n">second_split</span> |
| <span class="k">return</span> <span class="n">schema</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">partition</span> |
| |
| <span class="k">def</span> <span class="nf">poke_partition</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">partition</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">hook</span><span class="p">:</span> |
| <span class="kn">from</span> <span class="nn">airflow.hooks.hive_hooks</span> <span class="k">import</span> <span class="n">HiveMetastoreHook</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span> <span class="o">=</span> <span class="n">HiveMetastoreHook</span><span class="p">(</span> |
| <span class="n">metastore_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">metastore_conn_id</span><span class="p">)</span> |
| |
| <span class="n">schema</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">partition</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parse_partition_name</span><span class="p">(</span><span class="n">partition</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">'Poking for </span><span class="si">{schema}</span><span class="s1">.</span><span class="si">{table}</span><span class="s1">/</span><span class="si">{partition}</span><span class="s1">'</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="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">hook</span><span class="o">.</span><span class="n">check_for_named_partition</span><span class="p">(</span> |
| <span class="n">schema</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">partition</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="NamedHivePartitionSensor.poke"><a class="viewcode-back" href="../../../code.html#airflow.sensors.named_hive_partition_sensor.NamedHivePartitionSensor.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">partition_names</span> <span class="o">=</span> <span class="p">[</span> |
| <span class="n">partition_name</span> <span class="k">for</span> <span class="n">partition_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">partition_names</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">poke_partition</span><span class="p">(</span><span class="n">partition_name</span><span class="p">)</span> |
| <span class="p">]</span> |
| <span class="k">return</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">partition_names</span></div></div> |
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