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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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 io.druid.indexing.common.task;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import io.druid.indexing.common.TaskToolbox;
import io.druid.java.util.common.Intervals;
import io.druid.java.util.common.guava.Comparators;
import io.druid.segment.writeout.SegmentWriteOutMediumFactory;
import io.druid.query.aggregation.AggregatorFactory;
import io.druid.segment.IndexMerger;
import io.druid.segment.IndexSpec;
import io.druid.segment.IndexableAdapter;
import io.druid.segment.QueryableIndexIndexableAdapter;
import io.druid.segment.Rowboat;
import io.druid.segment.RowboatFilteringIndexAdapter;
import io.druid.timeline.DataSegment;
import io.druid.timeline.TimelineObjectHolder;
import io.druid.timeline.VersionedIntervalTimeline;
import io.druid.timeline.partition.PartitionChunk;
import org.joda.time.Interval;
import javax.annotation.Nullable;
import java.io.File;
import java.util.List;
import java.util.Map;
/**
*/
public class AppendTask extends MergeTaskBase
{
private final IndexSpec indexSpec;
private final List aggregators;
@JsonCreator
public AppendTask(
@JsonProperty("id") String id,
@JsonProperty("dataSource") String dataSource,
@JsonProperty("segments") List segments,
@JsonProperty("aggregations") List aggregators,
@JsonProperty("indexSpec") IndexSpec indexSpec,
// This parameter is left for compatibility when reading existing JSONs, to be removed in Druid 0.12.
@JsonProperty("buildV9Directly") Boolean buildV9Directly,
@JsonProperty("segmentWriteOutMediumFactory") @Nullable SegmentWriteOutMediumFactory segmentWriteOutMediumFactory,
@JsonProperty("context") Map context
)
{
super(id, dataSource, segments, segmentWriteOutMediumFactory, context);
this.indexSpec = indexSpec == null ? new IndexSpec() : indexSpec;
this.aggregators = aggregators;
}
@Override
public File merge(final TaskToolbox toolbox, final Map segments, final File outDir)
throws Exception
{
VersionedIntervalTimeline timeline = new VersionedIntervalTimeline(
Comparators.naturalNullsFirst()
);
for (DataSegment segment : segments.keySet()) {
timeline.add(segment.getInterval(), segment.getVersion(), segment.getShardSpec().createChunk(segment));
}
final Iterable segmentsToMerge = Iterables.concat(
Iterables.transform(
timeline.lookup(Intervals.of("1000-01-01/3000-01-01")),
new Function, Iterable>()
{
@Override
public Iterable apply(final TimelineObjectHolder input)
{
return Iterables.transform(
input.getObject(),
new Function, SegmentToMergeHolder>()
{
@Nullable
@Override
public SegmentToMergeHolder apply(PartitionChunk chunkInput)
{
DataSegment segment = chunkInput.getObject();
return new SegmentToMergeHolder(
input.getInterval(),
Preconditions.checkNotNull(
segments.get(segment),
"File for segment %s", segment.getIdentifier()
)
);
}
}
);
}
}
)
);
List adapters = Lists.newArrayList();
for (final SegmentToMergeHolder holder : segmentsToMerge) {
adapters.add(
new RowboatFilteringIndexAdapter(
new QueryableIndexIndexableAdapter(
toolbox.getIndexIO().loadIndex(holder.getFile())
),
new Predicate()
{
@Override
public boolean apply(Rowboat input)
{
return holder.getInterval().contains(input.getTimestamp());
}
}
)
);
}
IndexMerger indexMerger = toolbox.getIndexMergerV9();
return indexMerger.append(
adapters,
aggregators == null ? null : aggregators.toArray(new AggregatorFactory[aggregators.size()]),
outDir,
indexSpec,
getSegmentWriteOutMediumFactory()
);
}
@Override
public String getType()
{
return "append";
}
@JsonProperty("aggregations")
public List getAggregators()
{
return aggregators;
}
private static class SegmentToMergeHolder
{
private final Interval interval;
private final File file;
private SegmentToMergeHolder(Interval interval, File file)
{
this.interval = interval;
this.file = file;
}
public Interval getInterval()
{
return interval;
}
public File getFile()
{
return file;
}
}
}
