/*
|
* CDDL HEADER START
|
*
|
* The contents of this file are subject to the terms of the
|
* Common Development and Distribution License, Version 1.0 only
|
* (the "License"). You may not use this file except in compliance
|
* with the License.
|
*
|
* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
|
* or http://forgerock.org/license/CDDLv1.0.html.
|
* See the License for the specific language governing permissions
|
* and limitations under the License.
|
*
|
* When distributing Covered Code, include this CDDL HEADER in each
|
* file and include the License file at legal-notices/CDDLv1_0.txt.
|
* If applicable, add the following below this CDDL HEADER, with the
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
* information:
|
* Portions Copyright [yyyy] [name of copyright owner]
|
*
|
* CDDL HEADER END
|
*
|
*
|
* Copyright 2010 Sun Microsystems, Inc.
|
* Portions copyright 2013 ForgeRock AS.
|
*/
|
|
package com.forgerock.opendj.ldap;
|
|
import static com.forgerock.opendj.util.StaticUtils.DEBUG_LOG;
|
import static java.util.Collections.newSetFromMap;
|
|
import java.util.Set;
|
import java.util.concurrent.ConcurrentHashMap;
|
import java.util.logging.Level;
|
|
import com.forgerock.opendj.util.ReferenceCountedObject;
|
|
/**
|
* Checks connection for pending requests that have timed out.
|
*/
|
final class TimeoutChecker {
|
/**
|
* Global reference counted instance.
|
*/
|
static final ReferenceCountedObject<TimeoutChecker> TIMEOUT_CHECKER =
|
new ReferenceCountedObject<TimeoutChecker>() {
|
@Override
|
protected void destroyInstance(final TimeoutChecker instance) {
|
instance.shutdown();
|
}
|
|
@Override
|
protected TimeoutChecker newInstance() {
|
return new TimeoutChecker();
|
}
|
};
|
|
/**
|
* Condition variable used for coordinating the timeout thread.
|
*/
|
private final Object available = new Object();
|
|
/**
|
* The connection set must safe from CMEs because expiring requests can
|
* cause the connection to be closed.
|
*/
|
private final Set<LDAPConnection> connections =
|
newSetFromMap(new ConcurrentHashMap<LDAPConnection, Boolean>());
|
|
/**
|
* Used to signal thread shutdown.
|
*/
|
private volatile boolean shutdownRequested = false;
|
|
private TimeoutChecker() {
|
final Thread checkerThread = new Thread("OpenDJ LDAP SDK Connection Timeout Checker") {
|
@Override
|
public void run() {
|
DEBUG_LOG.fine("Timeout Checker Starting");
|
while (!shutdownRequested) {
|
final long currentTime = System.currentTimeMillis();
|
long delay = 0;
|
|
for (final LDAPConnection connection : connections) {
|
if (DEBUG_LOG.isLoggable(Level.FINER)) {
|
DEBUG_LOG.finer("Checking connection " + connection + " delay = "
|
+ delay);
|
}
|
|
// May update the connections set.
|
final long newDelay = connection.cancelExpiredRequests(currentTime);
|
if (newDelay > 0) {
|
if (delay > 0) {
|
delay = Math.min(newDelay, delay);
|
} else {
|
delay = newDelay;
|
}
|
}
|
}
|
|
try {
|
synchronized (available) {
|
if (delay <= 0) {
|
available.wait();
|
} else {
|
available.wait(delay);
|
}
|
}
|
} catch (final InterruptedException e) {
|
shutdownRequested = true;
|
}
|
}
|
}
|
};
|
|
checkerThread.setDaemon(true);
|
checkerThread.start();
|
}
|
|
void addConnection(final LDAPConnection connection) {
|
connections.add(connection);
|
signal();
|
}
|
|
void removeConnection(final LDAPConnection connection) {
|
connections.remove(connection);
|
// No need to signal.
|
}
|
|
private void shutdown() {
|
shutdownRequested = true;
|
signal();
|
}
|
|
// Wakes the timeout checker if it is sleeping.
|
private void signal() {
|
synchronized (available) {
|
available.notifyAll();
|
}
|
}
|
}
|
