/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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.
*/
package cascading.flow.hadoop2;
import java.beans.ConstructorProperties;
import java.util.Map;
import cascading.flow.FlowConnector;
import cascading.flow.hadoop.planner.MapReduceHadoopRuleRegistry;
import cascading.flow.planner.FlowPlanner;
import cascading.flow.planner.rule.RuleRegistry;
import cascading.scheme.Scheme;
import cascading.scheme.hadoop.SequenceFile;
/**
* Use the Hadoop2MR1FlowConnector to link source and sink {@link cascading.tap.Tap} instances with an assembly of {@link cascading.pipe.Pipe} instances into
* an executable {@link cascading.flow.hadoop.HadoopFlow} for execution on an Apache Hadoop cluster.
*
* @see cascading.property.AppProps
* @see cascading.flow.FlowConnectorProps
* @see cascading.flow.FlowDef
* @see cascading.flow.hadoop.MapReduceFlow
*/
public class Hadoop2MR1FlowConnector extends FlowConnector
{
/**
* Constructor FlowConnector creates a new FlowConnector instance.
* <p/>
* All properties passed to Hadoop are retrieved from a default instantiation of the Hadoop
* {@link org.apache.hadoop.mapred.JobConf} which pulls all properties from the local CLASSPATH.
*/
public Hadoop2MR1FlowConnector()
{
}
/**
* Constructor FlowConnector creates a new FlowConnector instance using the given {@link java.util.Properties} instance as
* default value for the underlying jobs. All properties are copied to a new native configuration instance.
*
* @param properties of type Properties
*/
@ConstructorProperties({"properties"})
public Hadoop2MR1FlowConnector( Map<Object, Object> properties )
{
super( properties );
}
/**
* Constructor HadoopFlowConnector creates a new HadoopFlowConnector instance.
* <p/>
* All properties passed to Hadoop are retrieved from a default instantiation of the Hadoop
* {@link org.apache.hadoop.mapred.JobConf} which pulls all properties from the local CLASSPATH.
*
* @param ruleRegistry of type RuleRegistry
*/
@ConstructorProperties({"ruleRegistry"})
public Hadoop2MR1FlowConnector( RuleRegistry ruleRegistry )
{
super( ruleRegistry );
}
/**
* Constructor HadoopFlowConnector creates a new HadoopFlowConnector instance using the given {@link java.util.Properties} instance as
* default value for the underlying jobs. All properties are copied to a new native configuration instance.
*
* @param properties of type Map
* @param ruleRegistry of type RuleRegistry
*/
@ConstructorProperties({"properties", "ruleRegistry"})
public Hadoop2MR1FlowConnector( Map<Object, Object> properties, RuleRegistry ruleRegistry )
{
super( properties, ruleRegistry );
}
@Override
protected Class<? extends Scheme> getDefaultIntermediateSchemeClass()
{
return SequenceFile.class;
}
@Override
protected FlowPlanner createFlowPlanner()
{
return new Hadoop2MR1Planner();
}
@Override
protected RuleRegistry createDefaultRuleRegistry()
{
return new MapReduceHadoopRuleRegistry();
}
}