com.blackberry.logdriver.pig.FirstItemOnlyStoreFunc.java Source code

Introduction

Here is the source code for com.blackberry.logdriver.pig.FirstItemOnlyStoreFunc.java

Source

/** Copyright (c) 2014 BlackBerry Limited
 *
 *  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.blackberry.logdriver.pig;

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.OutputFormat;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.pig.StoreFunc;
import org.apache.pig.data.Tuple;

public class FirstItemOnlyStoreFunc extends StoreFunc {
    private RecordWriter<Text, NullWritable> writer;

    @SuppressWarnings("rawtypes")
    @Override
    public OutputFormat getOutputFormat() throws IOException {
        return new TextOutputFormat<Text, NullWritable>();
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    @Override
    public void prepareToWrite(RecordWriter writer) throws IOException {
        this.writer = writer;
    }

    @Override
    public void putNext(Tuple tuple) throws IOException {
        try {
            writer.write(new Text(tuple.get(0).toString()), null);
        } catch (InterruptedException e) {
            throw new IOException(e);
        }
    }

    @Override
    public void setStoreLocation(String location, Job job) throws IOException {
        TextOutputFormat.setOutputPath(job, new Path(location));
    }

}