/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.protocol;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import org.xnio.IoFuture;
import org.xnio.IoFuture.Status;
/**
* A general implementation of {@link ProtocolTimeoutHandler} that takes into account the time taken for {@link Runnable} tasks
* to be executed.
*
* @author <a href="mailto:darran.lofthouse@jboss.com">Darran Lofthouse</a>
*/
public class GeneralTimeoutHandler implements ProtocolTimeoutHandler {
private volatile boolean thinking = false;
private final AtomicLong thinkTime = new AtomicLong(0);
public void suspendAndExecute(final Runnable runnable) {
thinking = true;
long startThinking = System.currentTimeMillis();
try {
runnable.run();
} finally {
thinkTime.addAndGet(System.currentTimeMillis() - startThinking);
thinking = false;
}
}
@Override
public Status await(IoFuture<?> future, long timeoutMillis) {
final long startTime = System.currentTimeMillis();
IoFuture.Status status = future.await(timeoutMillis, TimeUnit.MILLISECONDS);
while (status == IoFuture.Status.WAITING) {
if (thinking) {
status = future.await(timeoutMillis, TimeUnit.MILLISECONDS);
} else {
long timeToWait = (timeoutMillis + thinkTime.get()) - (System.currentTimeMillis() - startTime);
if (timeToWait > 0) {
status = future.await(timeToWait, TimeUnit.MILLISECONDS);
} else {
return status;
}
}
}
return status;
}
}