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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 core functionality for Hadoop helpers.
*
* @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 CFHadoopBase
{
public static $region = 'us-east-1';

/**
* Runs a specified script on the master node of your cluster.
*
* @param string $script (Required) The script to run with `script-runner.jar`.
* @param array $args (Optional) An indexed array of arguments to pass to the script.
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
*/
public static function script_runner($script, $args = null)
{
if (!$args) $args = array();
array_unshift($args, $script);

return array(
'Jar' => 's3://' . self::$region . '.elasticmapreduce/libs/script-runner/script-runner.jar',
'Args' => $args
);
}

/**
* Prepares a Hive or Pig script before passing it to the script runner.
*
* @param string $type (Required) The type of script to run. [Allowed values: `hive`, `pig`].
* @param array $args (Optional) An indexed array of arguments to pass to the script.
* @return array A standard array that is intended to be passed into a <CFStepConfig> object.
* @link http://hive.apache.org Apache Hive
* @link http://pig.apache.org Apache Pig
*/
public static function hive_pig_script($type, $args = null)
{
if (!$args) $args = array();
$args = is_array($args) ? $args : array($args);
$args = array_merge(array('--base-path', 's3://' . self::$region . '.elasticmapreduce/libs/' . $type . '/'), $args);

        return self::script_runner('s3://' . self::$region . '.elasticmapreduce/libs/' . $type . '/' . $type . '-script', $args);
}
}
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