com.zinnia.nectar.util.hadoop.JobCreatorUtil.java Source code

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Here is the source code for com.zinnia.nectar.util.hadoop.JobCreatorUtil.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.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 com.zinnia.nectar.util.hadoop;

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.mapreduce.InputFormat;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

/*
 * Utility class to create the Hadoop jobs
 */
public class JobCreatorUtil {

    public Job createJob(Class<? extends Mapper> mapperClass,
            Class<? extends WritableComparable> mapperOutputKeyClass,
            Class<? extends WritableComparable> mapperOutputValueClass,
            Class<? extends InputFormat> inputFormatClass, String[] inputFilePaths, String outputFilePath)
            throws IOException {
        Job job = new Job();
        job.setMapperClass(mapperClass);
        job.setMapOutputKeyClass(mapperOutputKeyClass);
        job.setMapOutputValueClass(mapperOutputValueClass);
        for (String inputFilePath : inputFilePaths) {
            FileInputFormat.addInputPath(job, new Path(inputFilePath));
        }
        FileOutputFormat.setOutputPath(job, new Path(outputFilePath));
        job.setInputFormatClass(inputFormatClass);

        return job;
    }

    public Job createJob(Class<? extends Mapper> mapperClass, Class<? extends Reducer> reducerClass,
            Class<? extends WritableComparable> mapperOutputKeyClass,
            Class<? extends WritableComparable> mapperOutputValueClass,
            Class<? extends WritableComparable> outputKeyClass,
            Class<? extends WritableComparable> outputValueClass, Class<? extends InputFormat> inputFormatClass,
            String[] inputFilePaths, String outputFilePath) throws IOException {
        Job job = createJob(mapperClass, mapperOutputKeyClass, mapperOutputValueClass, inputFormatClass,
                inputFilePaths, outputFilePath);
        job.setReducerClass(reducerClass);
        job.setOutputKeyClass(outputKeyClass);
        job.setOutputValueClass(outputValueClass);
        return job;
    }

}