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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.indices.warmer;
import com.google.common.collect.Lists;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.service.IndexService;
import org.elasticsearch.index.shard.service.IndexShard;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.threadpool.ThreadPool;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.TimeUnit;
/**
*/
public class InternalIndicesWarmer extends AbstractComponent implements IndicesWarmer {
public static final String INDEX_WARMER_ENABLED = "index.warmer.enabled";
private final ThreadPool threadPool;
private final ClusterService clusterService;
private final IndicesService indicesService;
private final CopyOnWriteArrayList<Listener> listeners = new CopyOnWriteArrayList<>();
@Inject
public InternalIndicesWarmer(Settings settings, ThreadPool threadPool, ClusterService clusterService, IndicesService indicesService) {
super(settings);
this.threadPool = threadPool;
this.clusterService = clusterService;
this.indicesService = indicesService;
}
@Override
public void addListener(Listener listener) {
listeners.add(listener);
}
@Override
public void removeListener(Listener listener) {
listeners.remove(listener);
}
public void warmNewReaders(final WarmerContext context) {
warmInternal(context, false);
}
public void warmTopReader(WarmerContext context) {
warmInternal(context, true);
}
private void warmInternal(final WarmerContext context, boolean topReader) {
final IndexMetaData indexMetaData = clusterService.state().metaData().index(context.shardId().index().name());
if (indexMetaData == null) {
return;
}
if (!indexMetaData.settings().getAsBoolean(INDEX_WARMER_ENABLED, settings.getAsBoolean(INDEX_WARMER_ENABLED, true))) {
return;
}
IndexService indexService = indicesService.indexService(context.shardId().index().name());
if (indexService == null) {
return;
}
final IndexShard indexShard = indexService.shard(context.shardId().id());
if (indexShard == null) {
return;
}
if (logger.isTraceEnabled()) {
if (topReader) {
logger.trace("[{}][{}] top warming [{}]", context.shardId().index().name(), context.shardId().id(), context);
} else {
logger.trace("[{}][{}] warming [{}]", context.shardId().index().name(), context.shardId().id(), context);
}
}
indexShard.warmerService().onPreWarm();
long time = System.nanoTime();
final List<IndicesWarmer.Listener.TerminationHandle> terminationHandles = Lists.newArrayList();
// get a handle on pending tasks
for (final Listener listener : listeners) {
if (topReader) {
terminationHandles.add(listener.warmTopReader(indexShard, indexMetaData, context, threadPool));
} else {
terminationHandles.add(listener.warmNewReaders(indexShard, indexMetaData, context, threadPool));
}
}
// wait for termination
for (IndicesWarmer.Listener.TerminationHandle terminationHandle : terminationHandles) {
try {
terminationHandle.awaitTermination();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
if (topReader) {
logger.warn("top warming has been interrupted", e);
} else {
logger.warn("warming has been interrupted", e);
}
break;
}
}
long took = System.nanoTime() - time;
indexShard.warmerService().onPostWarm(took);
if (indexShard.warmerService().logger().isTraceEnabled()) {
if (topReader) {
indexShard.warmerService().logger().trace("top warming took [{}]", new TimeValue(took, TimeUnit.NANOSECONDS));
} else {
indexShard.warmerService().logger().trace("warming took [{}]", new TimeValue(took, TimeUnit.NANOSECONDS));
}
}
}
}