io.druid.indexing.common.actions.SegmentInsertAction Maven / Gradle / Ivy

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * 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 io.druid.indexing.common.actions;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.type.TypeReference;
import com.google.common.collect.ImmutableSet;
import com.metamx.emitter.service.ServiceMetricEvent;
import io.druid.indexing.common.task.Task;
import io.druid.query.DruidMetrics;
import io.druid.timeline.DataSegment;

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

/**
 * Insert segments into metadata storage. The segment versions must all be less than or equal to a lock held by
 * your task for the segment intervals.
 * 
 * Word of warning: Very large "segments" sets can cause oversized audit log entries, which is bad because it means
 * that the task cannot actually complete. Callers should avoid this by avoiding inserting too many segments in the
 * same action.
 */
public class SegmentInsertAction implements TaskAction>
{
  @JsonIgnore
  private final Set segments;

  @JsonCreator
  public SegmentInsertAction(
      @JsonProperty("segments") Set segments
  )
  {
    this.segments = ImmutableSet.copyOf(segments);
  }

  @JsonProperty
  public Set getSegments()
  {
    return segments;
  }

  public TypeReference> getReturnTypeReference()
  {
    return new TypeReference>()
    {
    };
  }

  @Override
  public Set perform(Task task, TaskActionToolbox toolbox) throws IOException
  {
    toolbox.verifyTaskLocks(task, segments);

    final Set retVal = toolbox.getIndexerMetadataStorageCoordinator().announceHistoricalSegments(segments);

    // Emit metrics
    final ServiceMetricEvent.Builder metricBuilder = new ServiceMetricEvent.Builder()
        .setDimension(DruidMetrics.DATASOURCE, task.getDataSource())
        .setDimension(DruidMetrics.TASK_TYPE, task.getType());

    for (DataSegment segment : segments) {
      metricBuilder.setDimension(DruidMetrics.INTERVAL, segment.getInterval().toString());
      toolbox.getEmitter().emit(metricBuilder.build("segment/added/bytes", segment.getSize()));
    }

    return retVal;
  }

  @Override
  public boolean isAudited()
  {
    return true;
  }

  @Override
  public String toString()
  {
    return "SegmentInsertAction{" +
           "segments=" + segments +
           '}';
  }
}