1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* 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;
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.IndexSettings;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.shard.IndexShardState;
import org.elasticsearch.threadpool.ThreadPool;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
/**
*/
public final class IndicesWarmer extends AbstractComponent {
public static final String INDEX_WARMER_ENABLED = "index.warmer.enabled";
private final ThreadPool threadPool;
private final CopyOnWriteArrayList<Listener> listeners = new CopyOnWriteArrayList<>();
@Inject
public IndicesWarmer(Settings settings, ThreadPool threadPool) {
super(settings);
this.threadPool = threadPool;
}
public void addListener(Listener listener) {
listeners.add(listener);
}
public void removeListener(Listener listener) {
listeners.remove(listener);
}
public void warm(Engine.Searcher searcher, IndexShard shard, IndexSettings settings, boolean isTopReader) {
if (shard.state() == IndexShardState.CLOSED) {
return;
}
final Settings indexSettings = settings.getSettings();
if (!indexSettings.getAsBoolean(INDEX_WARMER_ENABLED, settings.getNodeSettings().getAsBoolean(INDEX_WARMER_ENABLED, true))) {
return;
}
if (logger.isTraceEnabled()) {
if (isTopReader) {
logger.trace("{} top warming [{}]", shard.shardId(), searcher.reader());
} else {
logger.trace("{} warming [{}]", shard.shardId(), searcher.reader());
}
}
shard.warmerService().onPreWarm();
long time = System.nanoTime();
final List<TerminationHandle> terminationHandles = new ArrayList<>();
// get a handle on pending tasks
for (final Listener listener : listeners) {
if (isTopReader) {
terminationHandles.add(listener.warmTopReader(shard, searcher));
} else {
terminationHandles.add(listener.warmNewReaders(shard, searcher));
}
}
// wait for termination
for (TerminationHandle terminationHandle : terminationHandles) {
try {
terminationHandle.awaitTermination();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
if (isTopReader) {
logger.warn("top warming has been interrupted", e);
} else {
logger.warn("warming has been interrupted", e);
}
break;
}
}
long took = System.nanoTime() - time;
shard.warmerService().onPostWarm(took);
if (shard.warmerService().logger().isTraceEnabled()) {
if (isTopReader) {
shard.warmerService().logger().trace("top warming took [{}]", new TimeValue(took, TimeUnit.NANOSECONDS));
} else {
shard.warmerService().logger().trace("warming took [{}]", new TimeValue(took, TimeUnit.NANOSECONDS));
}
}
}
/**
* Returns an executor for async warmer tasks
*/
public Executor getExecutor() {
return threadPool.executor(ThreadPool.Names.WARMER);
}
/** A handle on the execution of warm-up action. */
public interface TerminationHandle {
TerminationHandle NO_WAIT = () -> {};
/** Wait until execution of the warm-up action completes. */
void awaitTermination() throws InterruptedException;
}
public interface Listener {
/** Queue tasks to warm-up the given segments and return handles that allow to wait for termination of the execution of those tasks. */
TerminationHandle warmNewReaders(IndexShard indexShard, Engine.Searcher searcher);
TerminationHandle warmTopReader(IndexShard indexShard, Engine.Searcher searcher);
}
}
|
