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
|
/*
* Copyright (C) 2013, 2014 Brett Wooldridge
*
* Licensed 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 com.zaxxer.hikari.pool;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A Runnable that is scheduled in the future to report leaks. The ScheduledFuture is
* cancelled if the connection is closed before the leak time expires.
*
* @author Brett Wooldridge
*/
class ProxyLeakTask implements Runnable
{
private static final Logger LOGGER = LoggerFactory.getLogger(ProxyLeakTask.class);
private static final ProxyLeakTask NO_LEAK;
private ScheduledExecutorService executorService;
private long leakDetectionThreshold;
private ScheduledFuture<?> scheduledFuture;
private String connectionName;
private Exception exception;
private boolean isLeaked;
static
{
NO_LEAK = new ProxyLeakTask() {
@Override
public void cancel() {}
};
}
ProxyLeakTask(final long leakDetectionThreshold, final ScheduledExecutorService executorService)
{
this.executorService = executorService;
this.leakDetectionThreshold = leakDetectionThreshold;
}
private ProxyLeakTask(final ProxyLeakTask parent, final PoolEntry poolEntry)
{
this.exception = new Exception("Apparent connection leak detected");
this.connectionName = poolEntry.connection.toString();
scheduledFuture = parent.executorService.schedule(this, parent.leakDetectionThreshold, TimeUnit.MILLISECONDS);
}
private ProxyLeakTask()
{
}
ProxyLeakTask schedule(final PoolEntry bagEntry)
{
return (leakDetectionThreshold == 0) ? NO_LEAK : new ProxyLeakTask(this, bagEntry);
}
void updateLeakDetectionThreshold(final long leakDetectionThreshold)
{
this.leakDetectionThreshold = leakDetectionThreshold;
}
/** {@inheritDoc} */
@Override
public void run()
{
isLeaked = true;
final StackTraceElement[] stackTrace = exception.getStackTrace();
final StackTraceElement[] trace = new StackTraceElement[stackTrace.length - 5];
System.arraycopy(stackTrace, 5, trace, 0, trace.length);
exception.setStackTrace(trace);
LOGGER.warn("Connection leak detection triggered for {}, stack trace follows", connectionName, exception);
}
void cancel()
{
scheduledFuture.cancel(false);
if (isLeaked) {
LOGGER.info("Previously reported leaked connection {} was returned to the pool (unleaked)", connectionName);
}
}
}
|
