co.nubetech.hiho.dedup.DelimitedTextInputFormat.java Source code

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Here is the source code for co.nubetech.hiho.dedup.DelimitedTextInputFormat.java

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/**
 * Copyright 2011 Nube Technologies
 *
 * 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 co.nubetech.hiho.dedup;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.CompressionCodecFactory;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.Job;
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.FileInputFormat;
import org.apache.log4j.Logger;

public class DelimitedTextInputFormat extends FileInputFormat<Text, Text> {

    final static Logger logger = Logger.getLogger(co.nubetech.hiho.dedup.DelimitedTextInputFormat.class);

    public final static String DELIMITER_CONF = "mapreduce.input.hiho.delimited.delimiter";
    public final static String COLUMN_CONF = "mapreduce.input.hiho.delimited.column";

    @Override
    public RecordReader<Text, Text> createRecordReader(InputSplit split, TaskAttemptContext context) {
        logger.debug("Delimiter is: " + context.getConfiguration().get(DELIMITER_CONF));
        logger.debug("Column is: " + context.getConfiguration().getInt(COLUMN_CONF, 0));
        return new DelimitedLineRecordReader();
    }

    @Override
    protected boolean isSplitable(JobContext context, Path file) {
        CompressionCodec codec = new CompressionCodecFactory(context.getConfiguration()).getCodec(file);
        return codec == null;
    }

    public static void setProperties(Job job, String delim, int column) {
        job.getConfiguration().set(DELIMITER_CONF, delim);
        job.getConfiguration().setInt(COLUMN_CONF, column);
    }
}