blob: 45e8be6131606c79951688f354cb76640424b66f (
plain) (
blame)
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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.subscription.impl;
import com.yahoo.config.subscription.ConfigSourceSet;
import com.yahoo.vespa.config.JRTConnectionPool;
import com.yahoo.vespa.config.TimingValues;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
public class JRTManagedConnectionPools {
private static class JRTSourceThreadFactory implements ThreadFactory {
@Override
public Thread newThread(Runnable runnable) {
Thread t = new Thread(runnable, String.format("jrt-config-requester-%d", System.currentTimeMillis()));
// We want a daemon thread to avoid hanging threads in case something goes wrong in the config system
t.setDaemon(true);
return t;
}
}
private static class CountedPool {
final JRTConnectionPool pool;
final ScheduledThreadPoolExecutor scheduler;
long count;
CountedPool(JRTConnectionPool requester) {
pool = requester;
scheduler = new ScheduledThreadPoolExecutor(1, new JRTSourceThreadFactory());
count = 0;
scheduler.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
}
}
private final Map<ConfigSourceSet, CountedPool> pools = new HashMap<>();
public JRTConfigRequester acquire(ConfigSourceSet sourceSet, TimingValues timingValues) {
CountedPool countedPool;
synchronized (pools) {
countedPool = pools.get(sourceSet);
if (countedPool == null) {
countedPool = new CountedPool(new JRTConnectionPool(sourceSet));
pools.put(sourceSet, countedPool);
}
countedPool.count++;
}
return new JRTConfigRequester(sourceSet, countedPool.scheduler, countedPool.pool, timingValues);
}
public synchronized void release(ConfigSourceSet sourceSet) {
CountedPool countedPool;
synchronized (pools) {
countedPool = pools.get(sourceSet);
if (countedPool != null)
countedPool.count--;
if (countedPool == null || countedPool.count > 0) return;
pools.remove(sourceSet);
}
countedPool.pool.close();
countedPool.scheduler.shutdownNow();
try {
countedPool.scheduler.awaitTermination(1, TimeUnit.SECONDS);
} catch (InterruptedException e) {
throw new RuntimeException("Failed shutting down scheduler:", e);
}
}
}
|
