org.apache.druid.indexer.HadoopDruidDetermineConfigurationJob.java Source code

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Here is the source code for org.apache.druid.indexer.HadoopDruidDetermineConfigurationJob.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  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 org.apache.druid.indexer;

import com.google.common.collect.Lists;
import com.google.inject.Inject;
import org.apache.druid.indexer.partitions.HashedPartitionsSpec;
import org.apache.druid.indexer.partitions.PartitionsSpec;
import org.apache.druid.indexer.partitions.SingleDimensionPartitionsSpec;
import org.apache.druid.java.util.common.ISE;
import org.apache.druid.java.util.common.logger.Logger;
import org.apache.druid.timeline.partition.HashBasedNumberedShardSpec;
import org.joda.time.DateTime;
import org.joda.time.Interval;

import java.util.List;
import java.util.Map;
import java.util.TreeMap;

/**
 */
public class HadoopDruidDetermineConfigurationJob implements Jobby {
    private static final Logger log = new Logger(HadoopDruidDetermineConfigurationJob.class);
    private final HadoopDruidIndexerConfig config;
    private Jobby job;
    private String hadoopJobIdFile;

    @Inject
    public HadoopDruidDetermineConfigurationJob(HadoopDruidIndexerConfig config) {
        this.config = config;
    }

    @Override
    public boolean run() {
        JobHelper.ensurePaths(config);

        if (config.isDeterminingPartitions()) {
            job = createPartitionJob(config);
            config.setHadoopJobIdFileName(hadoopJobIdFile);
            return JobHelper.runSingleJob(job, config);
        } else {
            final PartitionsSpec partitionsSpec = config.getPartitionsSpec();
            final int shardsPerInterval;
            if (partitionsSpec instanceof HashedPartitionsSpec) {
                final HashedPartitionsSpec hashedPartitionsSpec = (HashedPartitionsSpec) partitionsSpec;
                shardsPerInterval = PartitionsSpec.isEffectivelyNull(hashedPartitionsSpec.getNumShards()) ? 1
                        : hashedPartitionsSpec.getNumShards();
            } else {
                shardsPerInterval = 1;
            }
            Map<Long, List<HadoopyShardSpec>> shardSpecs = new TreeMap<>();
            int shardCount = 0;
            for (Interval segmentGranularity : config.getSegmentGranularIntervals().get()) {
                DateTime bucket = segmentGranularity.getStart();
                // negative shardsPerInterval means a single shard
                List<HadoopyShardSpec> specs = Lists.newArrayListWithCapacity(shardsPerInterval);
                for (int i = 0; i < shardsPerInterval; i++) {
                    specs.add(new HadoopyShardSpec(new HashBasedNumberedShardSpec(i, shardsPerInterval,
                            config.getPartitionsSpec().getPartitionDimensions(),
                            HadoopDruidIndexerConfig.JSON_MAPPER), shardCount++));
                }
                shardSpecs.put(bucket.getMillis(), specs);
                log.info("DateTime[%s], spec[%s]", bucket, specs);
            }
            config.setShardSpecs(shardSpecs);
            return true;
        }
    }

    private static Jobby createPartitionJob(HadoopDruidIndexerConfig config) {
        final PartitionsSpec partitionsSpec = config.getPartitionsSpec();
        if (partitionsSpec instanceof HashedPartitionsSpec) {
            return new DetermineHashedPartitionsJob(config);
        } else if (partitionsSpec instanceof SingleDimensionPartitionsSpec) {
            return new DeterminePartitionsJob(config);
        } else {
            throw new ISE("Unknown partitionsSpec[%s]", partitionsSpec);
        }
    }

    @Override
    public Map<String, Object> getStats() {
        if (job == null) {
            return null;
        }

        return job.getStats();
    }

    @Override
    public String getErrorMessage() {
        if (job == null) {
            return null;
        }

        return job.getErrorMessage();
    }

    public void setHadoopJobIdFile(String hadoopJobIdFile) {
        this.hadoopJobIdFile = hadoopJobIdFile;
    }
}