org.apache.tez.mapreduce.output.LocalOnFileSorterOutput.java Source code

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Here is the source code for org.apache.tez.mapreduce.output.LocalOnFileSorterOutput.java

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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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 org.apache.tez.mapreduce.output;

import java.io.IOException;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.tez.runtime.api.Event;
import org.apache.tez.runtime.api.OutputContext;
import org.apache.tez.runtime.library.common.task.local.output.TezTaskOutput;
import org.apache.tez.runtime.library.output.OrderedPartitionedKVOutput;

public class LocalOnFileSorterOutput extends OrderedPartitionedKVOutput {

    private static final Log LOG = LogFactory.getLog(LocalOnFileSorterOutput.class);

    public LocalOnFileSorterOutput(OutputContext outputContext, int numPhysicalOutputs) {
        super(outputContext, numPhysicalOutputs);
    }

    @Override
    public List<Event> close() throws IOException {
        LOG.debug("Closing LocalOnFileSorterOutput");
        super.close();

        TezTaskOutput mapOutputFile = sorter.getMapOutput();
        FileSystem localFs = FileSystem.getLocal(conf);

        Path src = mapOutputFile.getOutputFile();
        Path dst = mapOutputFile.getInputFileForWrite(getContext().getTaskIndex(),
                localFs.getFileStatus(src).getLen());

        LOG.info("Renaming src = " + src + ", dst = " + dst);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Renaming src = " + src + ", dst = " + dst);
        }
        localFs.rename(src, dst);
        return null;
    }

    @Override
    protected List<Event> generateEventsOnClose() throws IOException {
        return null;
    }
}