    001    /*
    002     * Copyright (c) 2007-2014 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      }