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<?php
/*
* Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/*%******************************************************************************************%*/
// CLASS
/**
* Contains a set of pre-built Amazon EMR Hadoop steps.
*
* @version 2012.07.24
* @license See the included NOTICE.md file for more information.
* @copyright See the included NOTICE.md file for more information.
* @link http://aws.amazon.com/php/ PHP Developer Center
* @link http://hadoop.apache.org Apache Hadoop
*/
class CFHadoopStep extends CFHadoopBase
{
/**
* When ran as the first step in your job flow, enables the Hadoop debugging UI in the AWS
* Management Console.
*
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
*/
public static function enable_debugging()
{
return self::script_runner('s3://' . self::$region . '.elasticmapreduce/libs/state-pusher/0.1/fetch');
}
/**
* Step that installs Hive on your job flow.
*
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
* @link http://hive.apache.org Apache Hive
*/
public static function install_hive()
{
return self::hive_pig_script('hive', '--install-hive');
}
/**
* Step that runs a Hive script on your job flow.
*
* @param string $script (Required) The script to run with `script-runner.jar`.
* @param array $args (Optional) An indexed array of arguments to pass to the script.
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
* @link http://hive.apache.org Apache Hive
*/
public static function run_hive_script($script, $args = null)
{
if (!$args) $args = array();
$args = is_array($args) ? $args : array($args);
$args = array_merge(array('--run-hive-script', '--args', '-f', $script), $args);
return self::hive_pig_script('hive', $args);
}
/**
* Step that installs Pig on your job flow.
*
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
* @link http://pig.apache.org Apache Pig
*/
public static function install_pig()
{
return self::hive_pig_script('pig', array('--install-pig', '--pig-versions', 'latest'));
}
/**
* Step that runs a Pig script on your job flow.
*
* @param string $script (Required) The script to run with `script-runner.jar`.
* @param array $args (Optional) An indexed array of arguments to pass to the script.
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
* @link http://pig.apache.org Apache Pig
*/
public static function run_pig_script($script, $args = null)
{
if (!$args) $args = array();
$args = is_array($args) ? $args : array($args);
$args = array_merge(array('--run-pig-script', '--args', '-f', $script), $args);
return self::hive_pig_script('pig', $args);
}
}