001 /* 002 * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved. 003 * 004 * Project and contact information: http://www.cascading.org/ 005 * 006 * This file is part of the Cascading project. 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020 021 package cascading.flow.hadoop; 022 023 import cascading.flow.FlowProcess; 024 import cascading.tap.Tap; 025 import org.apache.hadoop.mapred.JobConf; 026 027 /** Class MapReduceFlowStep wraps a {@link JobConf} and allows it to be executed as a {@link cascading.flow.Flow}. */ 028 public class MapReduceFlowStep extends HadoopFlowStep 029 { 030 /** Field jobConf */ 031 private final JobConf jobConf; 032 033 MapReduceFlowStep( String flowName, String stepName, JobConf jobConf, Tap sink ) 034 { 035 super( stepName, 1 ); 036 setFlowName( flowName ); 037 this.jobConf = jobConf; 038 addSink( "default", sink ); 039 } 040 041 @Override 042 public JobConf getInitializedConfig( FlowProcess<JobConf> flowProcess, JobConf parentConfig ) 043 { 044 // allow to delete 045 getSink().sinkConfInit( flowProcess, new JobConf() ); 046 047 return jobConf; 048 } 049 }