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| <h1>Source code for airflow.contrib.hooks.aws_athena_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"># "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="sd">"""</span> |
| <span class="sd">This module contains AWS Athena hook</span> |
| <span class="sd">"""</span> |
| <span class="kn">from</span> <span class="nn">time</span> <span class="k">import</span> <span class="n">sleep</span> |
| <span class="kn">from</span> <span class="nn">airflow.contrib.hooks.aws_hook</span> <span class="k">import</span> <span class="n">AwsHook</span> |
| |
| |
| <div class="viewcode-block" id="AWSAthenaHook"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook">[docs]</a><span class="k">class</span> <span class="nc">AWSAthenaHook</span><span class="p">(</span><span class="n">AwsHook</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Interact with AWS Athena to run, poll queries and return query results</span> |
| |
| <span class="sd"> :param aws_conn_id: aws connection to use.</span> |
| <span class="sd"> :type aws_conn_id: str</span> |
| <span class="sd"> :param sleep_time: Time to wait between two consecutive call to check query status on athena</span> |
| <span class="sd"> :type sleep_time: int</span> |
| <span class="sd"> """</span> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.INTERMEDIATE_STATES"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.INTERMEDIATE_STATES">[docs]</a> <span class="n">INTERMEDIATE_STATES</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'QUEUED'</span><span class="p">,</span> <span class="s1">'RUNNING'</span><span class="p">,)</span></div> |
| <div class="viewcode-block" id="AWSAthenaHook.FAILURE_STATES"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.FAILURE_STATES">[docs]</a> <span class="n">FAILURE_STATES</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'FAILED'</span><span class="p">,</span> <span class="s1">'CANCELLED'</span><span class="p">,)</span></div> |
| <div class="viewcode-block" id="AWSAthenaHook.SUCCESS_STATES"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.SUCCESS_STATES">[docs]</a> <span class="n">SUCCESS_STATES</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'SUCCEEDED'</span><span class="p">,)</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="n">aws_conn_id</span><span class="o">=</span><span class="s1">'aws_default'</span><span class="p">,</span> <span class="n">sleep_time</span><span class="o">=</span><span class="mi">30</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">AWSAthenaHook</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">aws_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">sleep_time</span> <span class="o">=</span> <span class="n">sleep_time</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">conn</span> <span class="o">=</span> <span class="kc">None</span> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.get_conn"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.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">"""</span> |
| <span class="sd"> check if aws conn exists already or create one and return it</span> |
| |
| <span class="sd"> :return: boto3 session</span> |
| <span class="sd"> """</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">conn</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_client_type</span><span class="p">(</span><span class="s1">'athena'</span><span class="p">)</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">conn</span></div> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.run_query"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.run_query">[docs]</a> <span class="k">def</span> <span class="nf">run_query</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query</span><span class="p">,</span> <span class="n">query_context</span><span class="p">,</span> <span class="n">result_configuration</span><span class="p">,</span> <span class="n">client_request_token</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Run Presto query on athena with provided config and return submitted query_execution_id</span> |
| |
| <span class="sd"> :param query: Presto query to run</span> |
| <span class="sd"> :type query: str</span> |
| <span class="sd"> :param query_context: Context in which query need to be run</span> |
| <span class="sd"> :type query_context: dict</span> |
| <span class="sd"> :param result_configuration: Dict with path to store results in and config related to encryption</span> |
| <span class="sd"> :type result_configuration: dict</span> |
| <span class="sd"> :param client_request_token: Unique token created by user to avoid multiple executions of same query</span> |
| <span class="sd"> :type client_request_token: str</span> |
| <span class="sd"> :return: str</span> |
| <span class="sd"> """</span> |
| <span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">start_query_execution</span><span class="p">(</span><span class="n">QueryString</span><span class="o">=</span><span class="n">query</span><span class="p">,</span> |
| <span class="n">ClientRequestToken</span><span class="o">=</span><span class="n">client_request_token</span><span class="p">,</span> |
| <span class="n">QueryExecutionContext</span><span class="o">=</span><span class="n">query_context</span><span class="p">,</span> |
| <span class="n">ResultConfiguration</span><span class="o">=</span><span class="n">result_configuration</span><span class="p">)</span> |
| <span class="n">query_execution_id</span> <span class="o">=</span> <span class="n">response</span><span class="p">[</span><span class="s1">'QueryExecutionId'</span><span class="p">]</span> |
| <span class="k">return</span> <span class="n">query_execution_id</span></div> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.check_query_status"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.check_query_status">[docs]</a> <span class="k">def</span> <span class="nf">check_query_status</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query_execution_id</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Fetch the status of submitted athena query. Returns None or one of valid query states.</span> |
| |
| <span class="sd"> :param query_execution_id: Id of submitted athena query</span> |
| <span class="sd"> :type query_execution_id: str</span> |
| <span class="sd"> :return: str</span> |
| <span class="sd"> """</span> |
| <span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">get_query_execution</span><span class="p">(</span><span class="n">QueryExecutionId</span><span class="o">=</span><span class="n">query_execution_id</span><span class="p">)</span> |
| <span class="n">state</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">state</span> <span class="o">=</span> <span class="n">response</span><span class="p">[</span><span class="s1">'QueryExecution'</span><span class="p">][</span><span class="s1">'Status'</span><span class="p">][</span><span class="s1">'State'</span><span class="p">]</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">ex</span><span class="p">:</span> <span class="c1"># pylint: disable=broad-except</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s1">'Exception while getting query state'</span><span class="p">,</span> <span class="n">ex</span><span class="p">)</span> |
| <span class="k">finally</span><span class="p">:</span> |
| <span class="c1"># The error is being absorbed here and is being handled by the caller.</span> |
| <span class="c1"># The error is being absorbed to implement retries.</span> |
| <span class="k">return</span> <span class="n">state</span> <span class="c1"># pylint: disable=lost-exception</span></div> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.get_state_change_reason"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.get_state_change_reason">[docs]</a> <span class="k">def</span> <span class="nf">get_state_change_reason</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query_execution_id</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Fetch the reason for a state change (e.g. error message). Returns None or reason string.</span> |
| <span class="sd"> :param query_execution_id: Id of submitted athena query</span> |
| <span class="sd"> :type query_execution_id: str</span> |
| <span class="sd"> :return: str</span> |
| <span class="sd"> """</span> |
| <span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">get_query_execution</span><span class="p">(</span><span class="n">QueryExecutionId</span><span class="o">=</span><span class="n">query_execution_id</span><span class="p">)</span> |
| <span class="n">reason</span> <span class="o">=</span> <span class="kc">None</span> |
| <span class="k">try</span><span class="p">:</span> |
| <span class="n">reason</span> <span class="o">=</span> <span class="n">response</span><span class="p">[</span><span class="s1">'QueryExecution'</span><span class="p">][</span><span class="s1">'Status'</span><span class="p">][</span><span class="s1">'StateChangeReason'</span><span class="p">]</span> |
| <span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">ex</span><span class="p">:</span> <span class="c1"># pylint: disable=broad-except</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s1">'Exception while getting query state change reason'</span><span class="p">,</span> <span class="n">ex</span><span class="p">)</span> |
| <span class="k">finally</span><span class="p">:</span> |
| <span class="c1"># The error is being absorbed here and is being handled by the caller.</span> |
| <span class="c1"># The error is being absorbed to implement retries.</span> |
| <span class="k">return</span> <span class="n">reason</span> <span class="c1"># pylint: disable=lost-exception</span></div> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.get_query_results"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.get_query_results">[docs]</a> <span class="k">def</span> <span class="nf">get_query_results</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query_execution_id</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Fetch submitted athena query results. returns none if query is in intermediate state or</span> |
| <span class="sd"> failed/cancelled state else dict of query output</span> |
| |
| <span class="sd"> :param query_execution_id: Id of submitted athena query</span> |
| <span class="sd"> :type query_execution_id: str</span> |
| <span class="sd"> :return: dict</span> |
| <span class="sd"> """</span> |
| <span class="n">query_state</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_query_status</span><span class="p">(</span><span class="n">query_execution_id</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">query_state</span> <span class="ow">is</span> <span class="kc">None</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">error</span><span class="p">(</span><span class="s1">'Invalid Query state'</span><span class="p">)</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| <span class="k">elif</span> <span class="n">query_state</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">INTERMEDIATE_STATES</span> <span class="ow">or</span> <span class="n">query_state</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">FAILURE_STATES</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">error</span><span class="p">(</span><span class="s1">'Query is in </span><span class="si">{state}</span><span class="s1"> state. Cannot fetch results'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">state</span><span class="o">=</span><span class="n">query_state</span><span class="p">))</span> |
| <span class="k">return</span> <span class="kc">None</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">get_query_results</span><span class="p">(</span><span class="n">QueryExecutionId</span><span class="o">=</span><span class="n">query_execution_id</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.poll_query_status"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.poll_query_status">[docs]</a> <span class="k">def</span> <span class="nf">poll_query_status</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query_execution_id</span><span class="p">,</span> <span class="n">max_tries</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Poll the status of submitted athena query until query state reaches final state.</span> |
| <span class="sd"> Returns one of the final states</span> |
| |
| <span class="sd"> :param query_execution_id: Id of submitted athena query</span> |
| <span class="sd"> :type query_execution_id: str</span> |
| <span class="sd"> :param max_tries: Number of times to poll for query state before function exits</span> |
| <span class="sd"> :type max_tries: int</span> |
| <span class="sd"> :return: str</span> |
| <span class="sd"> """</span> |
| <span class="n">try_number</span> <span class="o">=</span> <span class="mi">1</span> |
| <span class="n">final_query_state</span> <span class="o">=</span> <span class="kc">None</span> <span class="c1"># Query state when query reaches final state or max_tries reached</span> |
| <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> |
| <span class="n">query_state</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">check_query_status</span><span class="p">(</span><span class="n">query_execution_id</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">query_state</span> <span class="ow">is</span> <span class="kc">None</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">'Trial </span><span class="si">{try_number}</span><span class="s1">: Invalid query state. Retrying again'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span> |
| <span class="n">try_number</span><span class="o">=</span><span class="n">try_number</span><span class="p">))</span> |
| <span class="k">elif</span> <span class="n">query_state</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">INTERMEDIATE_STATES</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">'Trial </span><span class="si">{try_number}</span><span class="s1">: Query is still in an intermediate state - </span><span class="si">{state}</span><span class="s1">'</span> |
| <span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">try_number</span><span class="o">=</span><span class="n">try_number</span><span class="p">,</span> <span class="n">state</span><span class="o">=</span><span class="n">query_state</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="s1">'Trial </span><span class="si">{try_number}</span><span class="s1">: Query execution completed. Final state is </span><span class="si">{state}</span><span class="s1">'</span> |
| <span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">try_number</span><span class="o">=</span><span class="n">try_number</span><span class="p">,</span> <span class="n">state</span><span class="o">=</span><span class="n">query_state</span><span class="p">))</span> |
| <span class="n">final_query_state</span> <span class="o">=</span> <span class="n">query_state</span> |
| <span class="k">break</span> |
| <span class="k">if</span> <span class="n">max_tries</span> <span class="ow">and</span> <span class="n">try_number</span> <span class="o">>=</span> <span class="n">max_tries</span><span class="p">:</span> <span class="c1"># Break loop if max_tries reached</span> |
| <span class="n">final_query_state</span> <span class="o">=</span> <span class="n">query_state</span> |
| <span class="k">break</span> |
| <span class="n">try_number</span> <span class="o">+=</span> <span class="mi">1</span> |
| <span class="n">sleep</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sleep_time</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">final_query_state</span></div> |
| |
| <div class="viewcode-block" id="AWSAthenaHook.stop_query"><a class="viewcode-back" href="../../../../_api/airflow/contrib/hooks/aws_athena_hook/index.html#airflow.contrib.hooks.aws_athena_hook.AWSAthenaHook.stop_query">[docs]</a> <span class="k">def</span> <span class="nf">stop_query</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">query_execution_id</span><span class="p">):</span> |
| <span class="sd">"""</span> |
| <span class="sd"> Cancel the submitted athena query</span> |
| |
| <span class="sd"> :param query_execution_id: Id of submitted athena query</span> |
| <span class="sd"> :type query_execution_id: str</span> |
| <span class="sd"> :return: dict</span> |
| <span class="sd"> """</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_conn</span><span class="p">()</span><span class="o">.</span><span class="n">stop_query_execution</span><span class="p">(</span><span class="n">QueryExecutionId</span><span class="o">=</span><span class="n">query_execution_id</span><span class="p">)</span></div></div> |
| </pre></div> |
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