org.apache.druid.indexing.appenderator.ActionBasedUsedSegmentChecker Maven / Gradle / Ivy

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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
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package org.apache.druid.indexing.appenderator;

import com.google.common.collect.Iterables;
import org.apache.druid.indexing.common.actions.SegmentListUsedAction;
import org.apache.druid.indexing.common.actions.TaskActionClient;
import org.apache.druid.java.util.common.JodaUtils;
import org.apache.druid.segment.realtime.appenderator.SegmentIdWithShardSpec;
import org.apache.druid.segment.realtime.appenderator.UsedSegmentChecker;
import org.apache.druid.timeline.DataSegment;
import org.joda.time.Interval;

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

public class ActionBasedUsedSegmentChecker implements UsedSegmentChecker
{
  private final TaskActionClient taskActionClient;

  public ActionBasedUsedSegmentChecker(TaskActionClient taskActionClient)
  {
    this.taskActionClient = taskActionClient;
  }

  @Override
  public Set findUsedSegments(Set identifiers) throws IOException
  {
    // Group by dataSource
    final Map> identifiersByDataSource = new TreeMap<>();
    for (SegmentIdWithShardSpec identifier : identifiers) {
      identifiersByDataSource.computeIfAbsent(identifier.getDataSource(), k -> new HashSet<>());

      identifiersByDataSource.get(identifier.getDataSource()).add(identifier);
    }

    final Set retVal = new HashSet<>();

    for (Map.Entry> entry : identifiersByDataSource.entrySet()) {
      final List intervals = JodaUtils.condenseIntervals(
          Iterables.transform(entry.getValue(), input -> input.getInterval())
      );

      final List usedSegmentsForIntervals = taskActionClient.submit(
          new SegmentListUsedAction(entry.getKey(), null, intervals)
      );

      for (DataSegment segment : usedSegmentsForIntervals) {
        if (identifiers.contains(SegmentIdWithShardSpec.fromDataSegment(segment))) {
          retVal.add(segment);
        }
      }
    }

    return retVal;
  }
}