/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013 Metamarkets Group Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package io.druid.indexing.common.task;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.metamx.common.ISE;
import com.metamx.common.logger.Logger;
import io.druid.indexing.common.TaskLock;
import io.druid.indexing.common.TaskStatus;
import io.druid.indexing.common.TaskToolbox;
import io.druid.indexing.common.actions.SegmentListUnusedAction;
import io.druid.indexing.common.actions.SegmentMetadataUpdateAction;
import io.druid.timeline.DataSegment;
import org.joda.time.Interval;
import java.util.List;
public class ArchiveTask extends AbstractFixedIntervalTask
{
private static final Logger log = new Logger(ArchiveTask.class);
public ArchiveTask(
@JsonProperty("id") String id,
@JsonProperty("dataSource") String dataSource,
@JsonProperty("interval") Interval interval
)
{
super(
TaskUtils.makeId(id, "archive", dataSource, interval),
dataSource,
interval
);
}
@Override
public String getType()
{
return "archive";
}
@Override
public TaskStatus run(TaskToolbox toolbox) throws Exception
{
// Confirm we have a lock (will throw if there isn't exactly one element)
final TaskLock myLock = Iterables.getOnlyElement(getTaskLocks(toolbox));
if (!myLock.getDataSource().equals(getDataSource())) {
throw new ISE("WTF?! Lock dataSource[%s] != task dataSource[%s]", myLock.getDataSource(), getDataSource());
}
if (!myLock.getInterval().equals(getInterval())) {
throw new ISE("WTF?! Lock interval[%s] != task interval[%s]", myLock.getInterval(), getInterval());
}
// List unused segments
final List<DataSegment> unusedSegments = toolbox
.getTaskActionClient()
.submit(new SegmentListUnusedAction(myLock.getDataSource(), myLock.getInterval()));
// Verify none of these segments have versions > lock version
for (final DataSegment unusedSegment : unusedSegments) {
if (unusedSegment.getVersion().compareTo(myLock.getVersion()) > 0) {
throw new ISE(
"WTF?! Unused segment[%s] has version[%s] > task version[%s]",
unusedSegment.getIdentifier(),
unusedSegment.getVersion(),
myLock.getVersion()
);
}
log.info("OK to archive segment: %s", unusedSegment.getIdentifier());
}
List<DataSegment> archivedSegments = Lists.newLinkedList();
// Move segments
for (DataSegment segment : unusedSegments) {
archivedSegments.add(toolbox.getDataSegmentArchiver().archive(segment));
}
// Update metadata for moved segments
toolbox.getTaskActionClient().submit(
new SegmentMetadataUpdateAction(
ImmutableSet.copyOf(archivedSegments)
)
);
return TaskStatus.success(getId());
}
}