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| <h1>Source code for airflow.operators.hive_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"># "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">__future__</span> <span class="k">import</span> <span class="n">unicode_literals</span> |
| |
| <span class="kn">import</span> <span class="nn">re</span> |
| |
| <span class="kn">from</span> <span class="nn">airflow.hooks.hive_hooks</span> <span class="k">import</span> <span class="n">HiveCliHook</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> |
| <span class="kn">from</span> <span class="nn">airflow.utils.operator_helpers</span> <span class="k">import</span> <span class="n">context_to_airflow_vars</span> |
| |
| |
| <div class="viewcode-block" id="HiveOperator"><a class="viewcode-back" href="../../../code.html#airflow.operators.hive_operator.HiveOperator">[docs]</a><span class="k">class</span> <span class="nc">HiveOperator</span><span class="p">(</span><span class="n">BaseOperator</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Executes hql code or hive script in a specific Hive database.</span> |
| |
| <span class="sd"> :param hql: the hql to be executed. Note that you may also use</span> |
| <span class="sd"> a relative path from the dag file of a (template) hive</span> |
| <span class="sd"> script. (templated)</span> |
| <span class="sd"> :type hql: string</span> |
| <span class="sd"> :param hive_cli_conn_id: reference to the Hive database. (templated)</span> |
| <span class="sd"> :type hive_cli_conn_id: string</span> |
| <span class="sd"> :param hiveconfs: if defined, these key value pairs will be passed</span> |
| <span class="sd"> to hive as ``-hiveconf "key"="value"``</span> |
| <span class="sd"> :type hiveconfs: dict</span> |
| <span class="sd"> :param hiveconf_jinja_translate: when True, hiveconf-type templating</span> |
| <span class="sd"> ${var} gets translated into jinja-type templating {{ var }} and</span> |
| <span class="sd"> ${hiveconf:var} gets translated into jinja-type templating {{ var }}.</span> |
| <span class="sd"> Note that you may want to use this along with the</span> |
| <span class="sd"> ``DAG(user_defined_macros=myargs)`` parameter. View the DAG</span> |
| <span class="sd"> object documentation for more details.</span> |
| <span class="sd"> :type hiveconf_jinja_translate: boolean</span> |
| <span class="sd"> :param script_begin_tag: If defined, the operator will get rid of the</span> |
| <span class="sd"> part of the script before the first occurrence of `script_begin_tag`</span> |
| <span class="sd"> :type script_begin_tag: str</span> |
| <span class="sd"> :param mapred_queue: queue used by the Hadoop CapacityScheduler. (templated)</span> |
| <span class="sd"> :type mapred_queue: string</span> |
| <span class="sd"> :param mapred_queue_priority: priority within CapacityScheduler queue.</span> |
| <span class="sd"> Possible settings include: VERY_HIGH, HIGH, NORMAL, LOW, VERY_LOW</span> |
| <span class="sd"> :type mapred_queue_priority: string</span> |
| <span class="sd"> :param mapred_job_name: This name will appear in the jobtracker.</span> |
| <span class="sd"> This can make monitoring easier.</span> |
| <span class="sd"> :type mapred_job_name: string</span> |
| <span class="sd"> """</span> |
| |
| <span class="n">template_fields</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'hql'</span><span class="p">,</span> <span class="s1">'schema'</span><span class="p">,</span> <span class="s1">'hive_cli_conn_id'</span><span class="p">,</span> <span class="s1">'mapred_queue'</span><span class="p">,</span> |
| <span class="s1">'hiveconfs'</span><span class="p">,</span> <span class="s1">'mapred_job_name'</span><span class="p">,</span> <span class="s1">'mapred_queue_priority'</span><span class="p">)</span> |
| <span class="n">template_ext</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'.hql'</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">'#f0e4ec'</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">hql</span><span class="p">,</span> |
| <span class="n">hive_cli_conn_id</span><span class="o">=</span><span class="s1">'hive_cli_default'</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">hiveconfs</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">hiveconf_jinja_translate</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="n">script_begin_tag</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">run_as_owner</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="n">mapred_queue</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">mapred_queue_priority</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">mapred_job_name</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">HiveOperator</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">hql</span> <span class="o">=</span> <span class="n">hql</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hive_cli_conn_id</span> <span class="o">=</span> <span class="n">hive_cli_conn_id</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">hiveconfs</span> <span class="o">=</span> <span class="n">hiveconfs</span> <span class="ow">or</span> <span class="p">{}</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hiveconf_jinja_translate</span> <span class="o">=</span> <span class="n">hiveconf_jinja_translate</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">script_begin_tag</span> <span class="o">=</span> <span class="n">script_begin_tag</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">run_as</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="k">if</span> <span class="n">run_as_owner</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">run_as</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dag</span><span class="o">.</span><span class="n">owner</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">mapred_queue</span> <span class="o">=</span> <span class="n">mapred_queue</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">mapred_queue_priority</span> <span class="o">=</span> <span class="n">mapred_queue_priority</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">mapred_job_name</span> <span class="o">=</span> <span class="n">mapred_job_name</span> |
| |
| <span class="c1"># assigned lazily - just for consistency we can create the attribute with a</span> |
| <span class="c1"># `None` initial value, later it will be populated by the execute method.</span> |
| <span class="c1"># This also makes `on_kill` implementation consistent since it assumes `self.hook`</span> |
| <span class="c1"># is defined.</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <span class="k">def</span> <span class="nf">get_hook</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">HiveCliHook</span><span class="p">(</span> |
| <span class="n">hive_cli_conn_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">hive_cli_conn_id</span><span class="p">,</span> |
| <span class="n">run_as</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">run_as</span><span class="p">,</span> |
| <span class="n">mapred_queue</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">mapred_queue</span><span class="p">,</span> |
| <span class="n">mapred_queue_priority</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">mapred_queue_priority</span><span class="p">,</span> |
| <span class="n">mapred_job_name</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">mapred_job_name</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">prepare_template</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">hiveconf_jinja_translate</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hql</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">sub</span><span class="p">(</span> |
| <span class="s2">"(\$\{(hiveconf:)?([ a-zA-Z0-9_]*)\})"</span><span class="p">,</span> <span class="s2">"{{ \g<3> }}"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">hql</span><span class="p">)</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">script_begin_tag</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">script_begin_tag</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">hql</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hql</span> <span class="o">=</span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</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">hql</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">script_begin_tag</span><span class="p">)[</span><span class="mi">1</span><span class="p">:])</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="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">'Executing: </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">hql</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_hook</span><span class="p">()</span> |
| |
| <span class="c1"># set the mapred_job_name if it's not set with dag, task, execution time info</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">mapred_job_name</span><span class="p">:</span> |
| <span class="n">ti</span> <span class="o">=</span> <span class="n">context</span><span class="p">[</span><span class="s1">'ti'</span><span class="p">]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span><span class="o">.</span><span class="n">mapred_job_name</span> <span class="o">=</span> <span class="s1">'Airflow HiveOperator task for </span><span class="si">{}</span><span class="s1">.</span><span class="si">{}</span><span class="s1">.</span><span class="si">{}</span><span class="s1">.</span><span class="si">{}</span><span class="s1">'</span>\ |
| <span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">ti</span><span class="o">.</span><span class="n">hostname</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">0</span><span class="p">],</span> <span class="n">ti</span><span class="o">.</span><span class="n">dag_id</span><span class="p">,</span> <span class="n">ti</span><span class="o">.</span><span class="n">task_id</span><span class="p">,</span> |
| <span class="n">ti</span><span class="o">.</span><span class="n">execution_date</span><span class="o">.</span><span class="n">isoformat</span><span class="p">())</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">hiveconf_jinja_translate</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hiveconfs</span> <span class="o">=</span> <span class="n">context_to_airflow_vars</span><span class="p">(</span><span class="n">context</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">hiveconfs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">context_to_airflow_vars</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">'Passing HiveConf: </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">hiveconfs</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span><span class="o">.</span><span class="n">run_cli</span><span class="p">(</span><span class="n">hql</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">hql</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">hive_conf</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">hiveconfs</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">dry_run</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_hook</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span><span class="o">.</span><span class="n">test_hql</span><span class="p">(</span><span class="n">hql</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">hql</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">on_kill</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">hook</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">hook</span><span class="o">.</span><span class="n">kill</span><span class="p">()</span></div> |
| </pre></div> |
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