org.apache.crunch.impl.mr.run.CrunchCombineFileInputFormat.java Source code

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Here is the source code for org.apache.crunch.impl.mr.run.CrunchCombineFileInputFormat.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.crunch.impl.mr.run;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;

import java.io.IOException;

public class CrunchCombineFileInputFormat<K, V> extends CombineFileInputFormat<K, V> {

    public CrunchCombineFileInputFormat(JobContext jobContext) {
        if (getMaxSplitSize(jobContext) == Long.MAX_VALUE) {
            Configuration conf = jobContext.getConfiguration();
            if (conf.get(RuntimeParameters.COMBINE_FILE_BLOCK_SIZE) != null) {
                setMaxSplitSize(conf.getLong(RuntimeParameters.COMBINE_FILE_BLOCK_SIZE, 0));
            } else {
                setMaxSplitSize(jobContext.getConfiguration().getLong("dfs.block.size", 134217728L));
            }
        }
    }

    @Override
    public RecordReader createRecordReader(InputSplit inputSplit, TaskAttemptContext taskAttemptContext)
            throws IOException {
        throw new UnsupportedOperationException(
                "CrunchCombineFileInputFormat.createRecordReader should never be called");
    }
}