com.zaxxer.hikari.pool.ProxyLeakTask Maven / Gradle / Ivy
/*
* 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);
static final ProxyLeakTask NO_LEAK;
private ScheduledFuture scheduledFuture;
private String connectionName;
private Exception exception;
private String threadName;
private boolean isLeaked;
static
{
NO_LEAK = new ProxyLeakTask() {
@Override
void schedule(ScheduledExecutorService executorService, long leakDetectionThreshold) {}
@Override
public void run() {}
@Override
public void cancel() {}
};
}
ProxyLeakTask(final PoolEntry poolEntry)
{
this.exception = new Exception("Apparent connection leak detected");
this.threadName = Thread.currentThread().getName();
this.connectionName = poolEntry.connection.toString();
}
private ProxyLeakTask()
{
}
void schedule(ScheduledExecutorService executorService, long leakDetectionThreshold)
{
scheduledFuture = executorService.schedule(this, leakDetectionThreshold, TimeUnit.MILLISECONDS);
}
/** {@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 {} on thread {}, stack trace follows", connectionName, threadName, exception);
}
void cancel()
{
scheduledFuture.cancel(false);
if (isLeaked) {
LOGGER.info("Previously reported leaked connection {} on thread {} was returned to the pool (unleaked)", connectionName, threadName);
}
}
}