/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2010 Sun Microsystems, Inc.
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*/
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package com.sun.opends.sdk.ldap;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.locks.Condition;
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import java.util.concurrent.locks.ReentrantLock;
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import org.glassfish.grizzly.utils.LinkedTransferQueue;
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import com.sun.opends.sdk.util.StaticUtils;
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/**
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* Checks connection for pending requests that have timed out.
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*/
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final class TimeoutChecker
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{
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static final TimeoutChecker INSTANCE = new TimeoutChecker();
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private final LinkedTransferQueue<LDAPConnection> connections;
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private transient final ReentrantLock lock;
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private transient final Condition available;
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private TimeoutChecker()
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{
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this.connections = new LinkedTransferQueue<LDAPConnection>();
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this.lock = new ReentrantLock();
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this.available = lock.newCondition();
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final Thread checkerThread = new Thread("Timeout Checker")
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{
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@Override
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public void run()
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{
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StaticUtils.DEBUG_LOG.fine("Timeout Checker Starting");
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final ReentrantLock lock = TimeoutChecker.this.lock;
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lock.lock();
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try
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{
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while (true)
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{
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final long currentTime = System.currentTimeMillis();
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long delay = 0;
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for (final LDAPConnection connection : connections)
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{
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StaticUtils.DEBUG_LOG.finer("Checking connection " + connection
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+ " delay = " + delay);
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final long newDelay = connection
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.cancelExpiredRequests(currentTime);
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if (newDelay > 0)
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{
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if (delay > 0)
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{
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delay = Math.min(newDelay, delay);
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}
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else
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{
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delay = newDelay;
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}
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}
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}
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try
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{
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if (delay <= 0)
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{
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StaticUtils.DEBUG_LOG.finer("There are no connections with "
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+ "timeout specified. Sleeping");
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available.await();
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}
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else
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{
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StaticUtils.DEBUG_LOG.finer("Sleeping for " + delay + "ms");
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available.await(delay, TimeUnit.MILLISECONDS);
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}
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}
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catch (final InterruptedException e)
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{
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// Just go around again.
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}
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}
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}
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finally
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{
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lock.unlock();
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}
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}
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};
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checkerThread.setDaemon(true);
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checkerThread.start();
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}
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void addConnection(final LDAPConnection connection)
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{
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final ReentrantLock lock = this.lock;
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lock.lock();
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try
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{
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connections.add(connection);
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available.signalAll();
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}
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finally
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{
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lock.unlock();
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}
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}
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void removeConnection(final LDAPConnection connection)
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{
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final ReentrantLock lock = this.lock;
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lock.lock();
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try
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{
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connections.remove(connection);
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}
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finally
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{
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lock.unlock();
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}
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}
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}
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