com.kylinolap.job.hadoop.cube.MergeCuboidJob.java Source code

Introduction

Here is the source code for com.kylinolap.job.hadoop.cube.MergeCuboidJob.java

Source

/*
 * Copyright 2013-2014 eBay Software Foundation
 *
 * 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.kylinolap.job.hadoop.cube;

import java.io.File;

import org.apache.commons.cli.Options;
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.SequenceFileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.kylinolap.common.KylinConfig;
import com.kylinolap.cube.CubeInstance;
import com.kylinolap.cube.CubeManager;
import com.kylinolap.job.constant.BatchConstants;

/**
 * @author ysong1
 */
public class MergeCuboidJob extends CuboidJob {

    private static final Logger log = LoggerFactory.getLogger(MergeCuboidJob.class);

    @Override
    public int run(String[] args) throws Exception {
        Options options = new Options();

        try {
            options.addOption(OPTION_JOB_NAME);
            options.addOption(OPTION_CUBE_NAME);
            options.addOption(OPTION_SEGMENT_NAME);
            options.addOption(OPTION_INPUT_PATH);
            options.addOption(OPTION_OUTPUT_PATH);
            parseOptions(options, args);

            String cubeName = getOptionValue(OPTION_CUBE_NAME).toUpperCase();
            String segmentName = getOptionValue(OPTION_SEGMENT_NAME).toUpperCase();
            KylinConfig config = KylinConfig.getInstanceFromEnv();
            CubeManager cubeMgr = CubeManager.getInstance(config);
            CubeInstance cube = cubeMgr.getCube(cubeName);
            // CubeSegment cubeSeg = cubeMgr.findSegment(cube, segmentName);

            // start job
            String jobName = getOptionValue(OPTION_JOB_NAME);
            System.out.println("Starting: " + jobName);
            job = Job.getInstance(getConf(), jobName);

            // set job configuration - basic
            File JarFile = new File(config.getKylinJobJarPath());
            if (JarFile.exists()) {
                job.setJar(config.getKylinJobJarPath());
            } else {
                job.setJarByClass(this.getClass());
            }

            // setJobJar(job);
            addInputDirs(getOptionValue(OPTION_INPUT_PATH), job);

            Path output = new Path(getOptionValue(OPTION_OUTPUT_PATH));
            FileOutputFormat.setOutputPath(job, output);

            // Mapper
            job.setInputFormatClass(SequenceFileInputFormat.class);
            job.setMapperClass(MergeCuboidMapper.class);
            job.setMapOutputKeyClass(Text.class);
            job.setMapOutputValueClass(Text.class);

            // Reducer - only one
            job.setReducerClass(CuboidReducer.class);
            job.setOutputFormatClass(SequenceFileOutputFormat.class);
            job.setOutputKeyClass(Text.class);
            job.setOutputValueClass(Text.class);

            // set job configuration
            job.getConfiguration().set(BatchConstants.CFG_CUBE_NAME, cubeName);
            job.getConfiguration().set(BatchConstants.CFG_CUBE_SEGMENT_NAME, segmentName);

            // add metadata to distributed cache
            attachKylinPropsAndMetadata(cube, job.getConfiguration());

            setReduceTaskNum(job, config, cubeName, 0);

            this.deletePath(job.getConfiguration(), output);

            return waitForCompletion(job);
        } catch (Exception e) {
            printUsage(options);
            log.error(e.getLocalizedMessage(), e);
            return 2;
        }
    }

}