com.metamx.druid.indexer.HadoopDruidIndexerJob.java Source code

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Here is the source code for com.metamx.druid.indexer.HadoopDruidIndexerJob.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.metamx.druid.indexer;

import com.google.common.base.Throwables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.metamx.common.ISE;
import com.metamx.common.logger.Logger;
import com.metamx.druid.client.DataSegment;
import com.metamx.druid.shard.NoneShardSpec;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;
import org.joda.time.DateTime;
import org.joda.time.DateTimeComparator;
import org.joda.time.Interval;

import java.io.IOException;
import java.util.List;
import java.util.Map;

/**
 */
public class HadoopDruidIndexerJob implements Jobby {
    private static final Logger log = new Logger(HadoopDruidIndexerJob.class);

    private final HadoopDruidIndexerConfig config;
    private final DbUpdaterJob dbUpdaterJob;
    private IndexGeneratorJob indexJob;
    private volatile List<DataSegment> publishedSegments = null;

    public HadoopDruidIndexerJob(HadoopDruidIndexerConfig config) {
        config.verify();
        this.config = config;

        if (config.isUpdaterJobSpecSet()) {
            dbUpdaterJob = new DbUpdaterJob(config);
        } else {
            dbUpdaterJob = null;
        }
    }

    @Override
    public boolean run() {
        List<Jobby> jobs = Lists.newArrayList();

        ensurePaths();

        if (config.partitionByDimension()) {
            jobs.add(new DeterminePartitionsJob(config));
        } else {
            Map<DateTime, List<HadoopyShardSpec>> shardSpecs = Maps.newTreeMap(DateTimeComparator.getInstance());
            int shardCount = 0;
            for (Interval segmentGranularity : config.getSegmentGranularIntervals()) {
                DateTime bucket = segmentGranularity.getStart();
                final HadoopyShardSpec spec = new HadoopyShardSpec(new NoneShardSpec(), shardCount++);
                shardSpecs.put(bucket, Lists.newArrayList(spec));
                log.info("DateTime[%s], spec[%s]", bucket, spec);
            }
            config.setShardSpecs(shardSpecs);
        }

        indexJob = new IndexGeneratorJob(config);
        jobs.add(indexJob);

        if (dbUpdaterJob != null) {
            jobs.add(dbUpdaterJob);
        } else {
            log.info("No updaterJobSpec set, not uploading to database");
        }

        String failedMessage = null;
        for (Jobby job : jobs) {
            if (failedMessage == null) {
                if (!job.run()) {
                    failedMessage = String.format("Job[%s] failed!", job.getClass());
                }
            }
        }

        if (failedMessage == null) {
            publishedSegments = IndexGeneratorJob.getPublishedSegments(config);
        }

        if (!config.isLeaveIntermediate()) {
            if (failedMessage == null || config.isCleanupOnFailure()) {
                Path workingPath = config.makeIntermediatePath();
                log.info("Deleting path[%s]", workingPath);
                try {
                    workingPath.getFileSystem(new Configuration()).delete(workingPath, true);
                } catch (IOException e) {
                    log.error(e, "Failed to cleanup path[%s]", workingPath);
                }
            }
        }

        if (failedMessage != null) {
            throw new ISE(failedMessage);
        }

        return true;
    }

    private void ensurePaths() {
        // config.addInputPaths() can have side-effects ( boo! :( ), so this stuff needs to be done before anything else
        try {
            Job job = new Job(new Configuration(),
                    String.format("%s-determine_partitions-%s", config.getDataSource(), config.getIntervals()));

            job.getConfiguration().set("io.sort.record.percent", "0.19");
            for (String propName : System.getProperties().stringPropertyNames()) {
                Configuration conf = job.getConfiguration();
                if (propName.startsWith("hadoop.")) {
                    conf.set(propName.substring("hadoop.".length()), System.getProperty(propName));
                }
            }

            config.addInputPaths(job);
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }
    }

    public List<DataSegment> getPublishedSegments() {
        if (publishedSegments == null) {
            throw new IllegalStateException("Job hasn't run yet. No segments have been published yet.");
        }
        return publishedSegments;
    }

    public IndexGeneratorJob.IndexGeneratorStats getIndexJobStats() {
        return indexJob.getJobStats();
    }
}