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<h1>Source code for airflow.hooks.druid_hook</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">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">print_function</span>
<span class="kn">import</span> <span class="nn">requests</span>
<span class="kn">import</span> <span class="nn">time</span>
<span class="kn">from</span> <span class="nn">pydruid.db</span> <span class="k">import</span> <span class="n">connect</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.hooks.base_hook</span> <span class="k">import</span> <span class="n">BaseHook</span>
<span class="kn">from</span> <span class="nn">airflow.hooks.dbapi_hook</span> <span class="k">import</span> <span class="n">DbApiHook</span>
<div class="viewcode-block" id="DruidHook"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidHook">[docs]</a><span class="k">class</span> <span class="nc">DruidHook</span><span class="p">(</span><span class="n">BaseHook</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Connection to Druid overlord for ingestion</span>
<span class="sd"> :param druid_ingest_conn_id: The connection id to the Druid overlord machine</span>
<span class="sd"> which accepts index jobs</span>
<span class="sd"> :type druid_ingest_conn_id: str</span>
<span class="sd"> :param timeout: The interval between polling</span>
<span class="sd"> the Druid job for the status of the ingestion job.</span>
<span class="sd"> Must be greater than or equal to 1</span>
<span class="sd"> :type timeout: int</span>
<span class="sd"> :param max_ingestion_time: The maximum ingestion time before assuming the job failed</span>
<span class="sd"> :type max_ingestion_time: int</span>
<span class="sd"> &quot;&quot;&quot;</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">druid_ingest_conn_id</span><span class="o">=</span><span class="s1">&#39;druid_ingest_default&#39;</span><span class="p">,</span>
<span class="n">timeout</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span>
<span class="n">max_ingestion_time</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">druid_ingest_conn_id</span> <span class="o">=</span> <span class="n">druid_ingest_conn_id</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="o">=</span> <span class="n">timeout</span>
<span class="bp">self</span><span class="o">.</span><span class="n">max_ingestion_time</span> <span class="o">=</span> <span class="n">max_ingestion_time</span>
<span class="bp">self</span><span class="o">.</span><span class="n">header</span> <span class="o">=</span> <span class="p">{</span><span class="s1">&#39;content-type&#39;</span><span class="p">:</span> <span class="s1">&#39;application/json&#39;</span><span class="p">}</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="o">&lt;</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="s2">&quot;Druid timeout should be equal or greater than 1&quot;</span><span class="p">)</span>
<div class="viewcode-block" id="DruidHook.get_conn_url"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidHook.get_conn_url">[docs]</a> <span class="k">def</span> <span class="nf">get_conn_url</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connection</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">druid_ingest_conn_id</span><span class="p">)</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span>
<span class="n">port</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span>
<span class="n">conn_type</span> <span class="o">=</span> <span class="s1">&#39;http&#39;</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">conn</span><span class="o">.</span><span class="n">conn_type</span> <span class="k">else</span> <span class="n">conn</span><span class="o">.</span><span class="n">conn_type</span>
<span class="n">endpoint</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;endpoint&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="s2">&quot;</span><span class="si">{conn_type}</span><span class="s2">://</span><span class="si">{host}</span><span class="s2">:</span><span class="si">{port}</span><span class="s2">/</span><span class="si">{endpoint}</span><span class="s2">&quot;</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></div>
<div class="viewcode-block" id="DruidHook.submit_indexing_job"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidHook.submit_indexing_job">[docs]</a> <span class="k">def</span> <span class="nf">submit_indexing_job</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">json_index_spec</span><span class="p">):</span>
<span class="n">url</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn_url</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;Druid ingestion spec: </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">json_index_spec</span><span class="p">)</span>
<span class="n">req_index</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">post</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">json</span><span class="o">=</span><span class="n">json_index_spec</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">header</span><span class="p">)</span>
<span class="k">if</span> <span class="n">req_index</span><span class="o">.</span><span class="n">status_code</span> <span class="o">!=</span> <span class="mi">200</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">&#39;Did not get 200 when &#39;</span>
<span class="s1">&#39;submitting the Druid job to </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">url</span><span class="p">))</span>
<span class="n">req_json</span> <span class="o">=</span> <span class="n">req_index</span><span class="o">.</span><span class="n">json</span><span class="p">()</span>
<span class="c1"># Wait until the job is completed</span>
<span class="n">druid_task_id</span> <span class="o">=</span> <span class="n">req_json</span><span class="p">[</span><span class="s1">&#39;task&#39;</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;Druid indexing task-id: </span><span class="si">%s</span><span class="s2">&quot;</span><span class="p">,</span> <span class="n">druid_task_id</span><span class="p">)</span>
<span class="n">running</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">sec</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">while</span> <span class="n">running</span><span class="p">:</span>
<span class="n">req_status</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&quot;</span><span class="si">{0}</span><span class="s2">/</span><span class="si">{1}</span><span class="s2">/status&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">druid_task_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="s2">&quot;Job still running for </span><span class="si">%s</span><span class="s2"> seconds...&quot;</span><span class="p">,</span> <span class="n">sec</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_ingestion_time</span> <span class="ow">and</span> <span class="n">sec</span> <span class="o">&gt;</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_ingestion_time</span><span class="p">:</span>
<span class="c1"># ensure that the job gets killed if the max ingestion time is exceeded</span>
<span class="n">requests</span><span class="o">.</span><span class="n">post</span><span class="p">(</span><span class="s2">&quot;</span><span class="si">{0}</span><span class="s2">/</span><span class="si">{1}</span><span class="s2">/shutdown&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">druid_task_id</span><span class="p">))</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">&#39;Druid ingestion took more than &#39;</span>
<span class="s1">&#39;</span><span class="si">%s</span><span class="s1"> seconds&#39;</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_ingestion_time</span><span class="p">)</span>
<span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="n">sec</span> <span class="o">=</span> <span class="n">sec</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span>
<span class="n">status</span> <span class="o">=</span> <span class="n">req_status</span><span class="o">.</span><span class="n">json</span><span class="p">()[</span><span class="s1">&#39;status&#39;</span><span class="p">][</span><span class="s1">&#39;status&#39;</span><span class="p">]</span>
<span class="k">if</span> <span class="n">status</span> <span class="o">==</span> <span class="s1">&#39;RUNNING&#39;</span><span class="p">:</span>
<span class="n">running</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">elif</span> <span class="n">status</span> <span class="o">==</span> <span class="s1">&#39;SUCCESS&#39;</span><span class="p">:</span>
<span class="n">running</span> <span class="o">=</span> <span class="kc">False</span> <span class="c1"># Great success!</span>
<span class="k">elif</span> <span class="n">status</span> <span class="o">==</span> <span class="s1">&#39;FAILED&#39;</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">&#39;Druid indexing job failed, &#39;</span>
<span class="s1">&#39;check console for more info&#39;</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">AirflowException</span><span class="p">(</span><span class="s1">&#39;Could not get status of the job, got </span><span class="si">%s</span><span class="s1">&#39;</span><span class="p">,</span> <span class="n">status</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;Successful index&#39;</span><span class="p">)</span></div></div>
<div class="viewcode-block" id="DruidDbApiHook"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook">[docs]</a><span class="k">class</span> <span class="nc">DruidDbApiHook</span><span class="p">(</span><span class="n">DbApiHook</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Interact with Druid broker</span>
<span class="sd"> This hook is purely for users to query druid broker.</span>
<span class="sd"> For ingestion, please use druidHook.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="DruidDbApiHook.conn_name_attr"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.conn_name_attr">[docs]</a> <span class="n">conn_name_attr</span> <span class="o">=</span> <span class="s1">&#39;druid_broker_conn_id&#39;</span></div>
<div class="viewcode-block" id="DruidDbApiHook.default_conn_name"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.default_conn_name">[docs]</a> <span class="n">default_conn_name</span> <span class="o">=</span> <span class="s1">&#39;druid_broker_default&#39;</span></div>
<div class="viewcode-block" id="DruidDbApiHook.supports_autocommit"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.supports_autocommit">[docs]</a> <span class="n">supports_autocommit</span> <span class="o">=</span> <span class="kc">False</span></div>
<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="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">DruidDbApiHook</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>
<div class="viewcode-block" id="DruidDbApiHook.get_conn"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.get_conn">[docs]</a> <span class="k">def</span> <span class="nf">get_conn</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Establish a connection to druid broker.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connection</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">druid_broker_conn_id</span><span class="p">)</span>
<span class="n">druid_broker_conn</span> <span class="o">=</span> <span class="n">connect</span><span class="p">(</span>
<span class="n">host</span><span class="o">=</span><span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">,</span>
<span class="n">port</span><span class="o">=</span><span class="n">conn</span><span class="o">.</span><span class="n">port</span><span class="p">,</span>
<span class="n">path</span><span class="o">=</span><span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;endpoint&#39;</span><span class="p">,</span> <span class="s1">&#39;/druid/v2/sql&#39;</span><span class="p">),</span>
<span class="n">scheme</span><span class="o">=</span><span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;schema&#39;</span><span class="p">,</span> <span class="s1">&#39;http&#39;</span><span class="p">)</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;Get the connection to druid broker on </span><span class="si">%s</span><span class="s1">&#39;</span><span class="p">,</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span><span class="p">)</span>
<span class="k">return</span> <span class="n">druid_broker_conn</span></div>
<div class="viewcode-block" id="DruidDbApiHook.get_uri"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.get_uri">[docs]</a> <span class="k">def</span> <span class="nf">get_uri</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Get the connection uri for druid broker.</span>
<span class="sd"> e.g: druid://localhost:8082/druid/v2/sql/</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_connection</span><span class="p">(</span><span class="nb">getattr</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">conn_name_attr</span><span class="p">))</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">host</span>
<span class="k">if</span> <span class="n">conn</span><span class="o">.</span><span class="n">port</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">host</span> <span class="o">+=</span> <span class="s1">&#39;:</span><span class="si">{port}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">port</span><span class="o">=</span><span class="n">conn</span><span class="o">.</span><span class="n">port</span><span class="p">)</span>
<span class="n">conn_type</span> <span class="o">=</span> <span class="s1">&#39;druid&#39;</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">conn</span><span class="o">.</span><span class="n">conn_type</span> <span class="k">else</span> <span class="n">conn</span><span class="o">.</span><span class="n">conn_type</span>
<span class="n">endpoint</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">extra_dejson</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;endpoint&#39;</span><span class="p">,</span> <span class="s1">&#39;druid/v2/sql&#39;</span><span class="p">)</span>
<span class="k">return</span> <span class="s1">&#39;</span><span class="si">{conn_type}</span><span class="s1">://</span><span class="si">{host}</span><span class="s1">/</span><span class="si">{endpoint}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="n">conn_type</span><span class="o">=</span><span class="n">conn_type</span><span class="p">,</span> <span class="n">host</span><span class="o">=</span><span class="n">host</span><span class="p">,</span> <span class="n">endpoint</span><span class="o">=</span><span class="n">endpoint</span><span class="p">)</span></div>
<div class="viewcode-block" id="DruidDbApiHook.set_autocommit"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.set_autocommit">[docs]</a> <span class="k">def</span> <span class="nf">set_autocommit</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">conn</span><span class="p">,</span> <span class="n">autocommit</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div>
<div class="viewcode-block" id="DruidDbApiHook.get_pandas_df"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.get_pandas_df">[docs]</a> <span class="k">def</span> <span class="nf">get_pandas_df</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">parameters</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div>
<div class="viewcode-block" id="DruidDbApiHook.insert_rows"><a class="viewcode-back" href="../../../_api/airflow/hooks/druid_hook/index.html#airflow.hooks.druid_hook.DruidDbApiHook.insert_rows">[docs]</a> <span class="k">def</span> <span class="nf">insert_rows</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">table</span><span class="p">,</span> <span class="n">rows</span><span class="p">,</span> <span class="n">target_fields</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">commit_every</span><span class="o">=</span><span class="mi">1000</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div></div>
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