com.littlehotspot.hadoop.mr.nginx.module.hdfs2hbase.api.user.UserScheduler.java Source code

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Here is the source code for com.littlehotspot.hadoop.mr.nginx.module.hdfs2hbase.api.user.UserScheduler.java

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/**
 * Copyright (c) 2017, Stupid Bird and/or its affiliates. All rights reserved.
 * STUPID BIRD PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 * @Project : hadoop
 * @Package : com.littlehotspot.hadoop.mr.nginx.module.hdfs2hbase.api.user
 * @author <a href="http://www.lizhaoweb.net">??(John.Lee)</a>
 * @EMAIL 404644381@qq.com
 * @Time : 15:31
 */
package com.littlehotspot.hadoop.mr.nginx.module.hdfs2hbase.api.user;

import com.littlehotspot.hadoop.mr.nginx.bean.Argument;
import com.littlehotspot.hadoop.mr.nginx.module.hdfs2hbase.HBaseHelper;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.Tool;

import java.net.URI;
import java.util.regex.Pattern;

/**
 * <h1> -  [API]</h1>
 *
 * @author <a href="http://www.lizhaoweb.cn">??(John.Lee)</a>
 * @version 1.0.0.0.1
 * @notes Created on 20170601<br>
 * Revision of last commit:$Revision$<br>
 * Author of last commit:$Author$<br>
 * Date of last commit:$Date$<br>
 */
public class UserScheduler extends Configured implements Tool {

    @Override
    public int run(String[] args) throws Exception {
        try {
            CommonVariables.initMapReduce(this.getConf(), args);// ? MAP REDUCE
            CommonVariables.hBaseHelper = new HBaseHelper(this.getConf());

            // ??
            String matcherRegex = CommonVariables.getParameterValue(Argument.MapperInputFormatRegex);
            String hdfsInputPath = CommonVariables.getParameterValue(Argument.InputPath);
            String hdfsOutputPath = CommonVariables.getParameterValue(Argument.OutputPath);

            // ???
            if (StringUtils.isNotBlank(matcherRegex)) {
                CommonVariables.MAPPER_INPUT_FORMAT_REGEX = Pattern.compile(matcherRegex);
            }

            Path inputPath = new Path(hdfsInputPath);
            Path outputPath = new Path(hdfsOutputPath);

            Job job = Job.getInstance(this.getConf(), this.getClass().getName());
            job.setJarByClass(this.getClass());

            job.setMapperClass(UserMapper.class);
            job.setMapOutputKeyClass(Text.class);
            job.setMapOutputValueClass(Text.class);

            job.setReducerClass(UserReducer.class);
            job.setOutputKeyClass(Text.class);
            job.setOutputValueClass(Text.class);

            FileInputFormat.addInputPath(job, inputPath);
            FileOutputFormat.setOutputPath(job, outputPath);

            FileSystem fileSystem = FileSystem.get(new URI(outputPath.toString()), this.getConf());
            if (fileSystem.exists(outputPath)) {
                fileSystem.delete(outputPath, true);
            }

            // 
            boolean state = job.waitForCompletion(true);
            if (!state) {
                throw new Exception("MapReduce task execute failed.........");
            }

            return 0;
        } catch (Exception e) {
            e.printStackTrace();
            return 1;
        }
    }

}