cascading.flow.hadoop.MapReduceFlowStep.java Source code

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Here is the source code for cascading.flow.hadoop.MapReduceFlowStep.java

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/*
 * Copyright (c) 2007-2015 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.hadoop;

import cascading.flow.FlowProcess;
import cascading.tap.Tap;
import org.apache.hadoop.mapred.JobConf;

/** Class MapReduceFlowStep wraps a {@link JobConf} and allows it to be executed as a {@link cascading.flow.Flow}. */
public class MapReduceFlowStep extends HadoopFlowStep {
    /** Field jobConf */
    private final JobConf jobConf;

    MapReduceFlowStep(String flowName, String stepName, JobConf jobConf, Tap sink) {
        super(null, null);
        setName(stepName);
        setFlowName(flowName);
        this.jobConf = jobConf;
        addSink("default", sink);
    }

    @Override
    public JobConf createInitializedConfig(FlowProcess<JobConf> flowProcess, JobConf parentConfig) {
        // allow to delete
        getSink().sinkConfInit(flowProcess, new JobConf());

        return jobConf;
    }
}