org.apache.druid.indexer.path.GranularUnprocessedPathSpec.java Source code

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Here is the source code for org.apache.druid.indexer.path.GranularUnprocessedPathSpec.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.path;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.collect.Ordering;
import com.google.common.collect.Sets;
import org.apache.druid.indexer.HadoopDruidIndexerConfig;
import org.apache.druid.indexer.hadoop.FSSpideringIterator;
import org.apache.druid.java.util.common.DateTimes;
import org.apache.druid.java.util.common.StringUtils;
import org.apache.druid.java.util.common.granularity.Granularity;
import org.apache.druid.java.util.common.guava.Comparators;
import org.apache.druid.segment.indexing.granularity.UniformGranularitySpec;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;
import org.joda.time.DateTime;
import org.joda.time.Interval;

import java.io.IOException;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

/**
 */
public class GranularUnprocessedPathSpec extends GranularityPathSpec {
    private int maxBuckets;

    @JsonProperty
    public int getMaxBuckets() {
        return maxBuckets;
    }

    public void setMaxBuckets(int maxBuckets) {
        this.maxBuckets = maxBuckets;
    }

    @Override
    public Job addInputPaths(HadoopDruidIndexerConfig config, Job job) throws IOException {
        // This PathSpec breaks so many abstractions that we might as break some more
        Preconditions.checkState(config.getGranularitySpec() instanceof UniformGranularitySpec,
                StringUtils.format("Cannot use %s without %s", GranularUnprocessedPathSpec.class.getSimpleName(),
                        UniformGranularitySpec.class.getSimpleName()));

        final Path betaInput = new Path(getInputPath());
        final FileSystem fs = betaInput.getFileSystem(job.getConfiguration());
        final Granularity segmentGranularity = config.getGranularitySpec().getSegmentGranularity();

        Map<Long, Long> inputModifiedTimes = new TreeMap<>(Ordering.natural().reverse());

        for (FileStatus status : FSSpideringIterator.spiderIterable(fs, betaInput)) {
            final DateTime key = segmentGranularity.toDate(status.getPath().toString());
            final Long currVal = inputModifiedTimes.get(key.getMillis());
            final long mTime = status.getModificationTime();

            inputModifiedTimes.put(key.getMillis(), currVal == null ? mTime : Math.max(currVal, mTime));
        }

        Set<Interval> bucketsToRun = Sets.newTreeSet(Comparators.intervals());
        for (Map.Entry<Long, Long> entry : inputModifiedTimes.entrySet()) {
            DateTime timeBucket = DateTimes.utc(entry.getKey());
            long mTime = entry.getValue();

            String bucketOutput = StringUtils.format("%s/%s",
                    config.getSchema().getIOConfig().getSegmentOutputPath(), segmentGranularity.toPath(timeBucket));
            for (FileStatus fileStatus : FSSpideringIterator.spiderIterable(fs, new Path(bucketOutput))) {
                if (fileStatus.getModificationTime() > mTime) {
                    bucketsToRun.add(new Interval(timeBucket, segmentGranularity.increment(timeBucket)));
                    break;
                }
            }

            if (bucketsToRun.size() >= maxBuckets) {
                break;
            }
        }

        config.setGranularitySpec(
                new UniformGranularitySpec(segmentGranularity, config.getGranularitySpec().getQueryGranularity(),
                        config.getGranularitySpec().isRollup(), Lists.newArrayList(bucketsToRun)

                ));

        return super.addInputPaths(config, job);
    }
}