com.expedia.dsp.data.squeeze.impl.text.TextCombineFileInputFormat Maven / Gradle / Ivy

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Hadoop utility to compact small files

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/**
 * Copyright (C) 2018 Expedia Group
 *
 * 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 com.expedia.dsp.data.squeeze.impl.text;

import com.expedia.dsp.data.squeeze.impl.CombineFileWritable;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
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.CombineFileRecordReader;
import org.apache.hadoop.mapreduce.lib.input.CombineFileSplit;

import java.io.IOException;

/**
 * Text Combine file input format reads multiple files in same mapper.
 *
 * @author Yashraj R. Sontakke
 */
public class TextCombineFileInputFormat extends CombineFileInputFormat {

    public TextCombineFileInputFormat() {
        super();
    }

    @Override
    public RecordReader createRecordReader(InputSplit split, TaskAttemptContext context) throws IOException {
        return new CombineFileRecordReader((CombineFileSplit) split, context, TextRecordReader.class);
    }

    @Override
    protected boolean isSplitable(JobContext context, Path file) {
        return false;
    }
}