andreacavalli/netty5
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

* Added ReadTimeoutHandler and its related exceptions

Browse Source
This commit is contained in:
Trustin Lee 2009-02-02 05:52:39 +00:00
parent 90c4999c74
commit a0e2c470b7
3 changed files with 275 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
src/main/java/org/jboss/netty/handler/timeout/ChannelReadTimeoutException.java Normal file
View File

@ -0,0 +1,63 @@
/*
* JBoss, Home of Professional Open Source
*
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* by the @author tags. See the COPYRIGHT.txt 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.netty.handler.timeout;
import org.jboss.netty.channel.ChannelException;
/**
* @author The Netty Project (netty-dev@lists.jboss.org)
* @author Trustin Lee (tlee@redhat.com)
* @version $Rev$, $Date$
*/
public class ChannelReadTimeoutException extends ChannelException {
private static final long serialVersionUID = -4596059237992273913L;
/**
* Creates a new instance.
*/
public ChannelReadTimeoutException() {
super();
}
/**
* Creates a new instance.
*/
public ChannelReadTimeoutException(String message, Throwable cause) {
super(message, cause);
}
/**
* Creates a new instance.
*/
public ChannelReadTimeoutException(String message) {
super(message);
}
/**
* Creates a new instance.
*/
public ChannelReadTimeoutException(Throwable cause) {
super(cause);
}
}

63
src/main/java/org/jboss/netty/handler/timeout/ChannelTimeoutException.java Normal file
View File

@ -0,0 +1,63 @@
/*
* JBoss, Home of Professional Open Source
*
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* by the @author tags. See the COPYRIGHT.txt 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.netty.handler.timeout;
import org.jboss.netty.channel.ChannelException;
/**
* @author The Netty Project (netty-dev@lists.jboss.org)
* @author Trustin Lee (tlee@redhat.com)
* @version $Rev$, $Date$
*/
public class ChannelTimeoutException extends ChannelException {
private static final long serialVersionUID = 4673641882869672533L;
/**
* Creates a new instance.
*/
public ChannelTimeoutException() {
super();
}
/**
* Creates a new instance.
*/
public ChannelTimeoutException(String message, Throwable cause) {
super(message, cause);
}
/**
* Creates a new instance.
*/
public ChannelTimeoutException(String message) {
super(message);
}
/**
* Creates a new instance.
*/
public ChannelTimeoutException(Throwable cause) {
super(cause);
}
}

149
src/main/java/org/jboss/netty/handler/timeout/ReadTimeoutHandler.java Normal file
View File

@ -0,0 +1,149 @@
/*
* JBoss, Home of Professional Open Source
*
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* by the @author tags. See the COPYRIGHT.txt 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.netty.handler.timeout;
import java.util.concurrent.TimeUnit;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelPipelineCoverage;
import org.jboss.netty.channel.ChannelStateEvent;
import org.jboss.netty.channel.Channels;
import org.jboss.netty.channel.LifeCycleAwareChannelHandler;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
import org.jboss.netty.util.ExternalResourceReleasable;
/**
* @author The Netty Project (netty-dev@lists.jboss.org)
* @author Trustin Lee (tlee@redhat.com)
* @version $Rev$, $Date$
*/
@ChannelPipelineCoverage("one")
public class ReadTimeoutHandler extends SimpleChannelUpstreamHandler implements LifeCycleAwareChannelHandler, ExternalResourceReleasable {
static final ChannelReadTimeoutException EXCEPTION = new ChannelReadTimeoutException();
final Timer timer;
final long timeoutNanos;
private volatile Timeout timeout;
private volatile ReadTimeoutTask task;
volatile long lastReadTime;
public ReadTimeoutHandler(
Timer timer, long timeout, TimeUnit unit) {
if (timer == null) {
throw new NullPointerException("timer");
}
if (unit == null) {
throw new NullPointerException("unit");
}
if (timeout <= 0) {
throw new IllegalArgumentException(
"timeout must be greater than 0: " + timeout);
}
this.timer = timer;
timeoutNanos = unit.toNanos(timeout);
}
public void releaseExternalResources() {
timer.stop();
}
public void beforeAdd(ChannelHandlerContext ctx) throws Exception {
initialize(ctx);
}
public void afterAdd(ChannelHandlerContext ctx) throws Exception {
// NOOP
}
public void beforeRemove(ChannelHandlerContext ctx) throws Exception {
destroy();
}
public void afterRemove(ChannelHandlerContext ctx) throws Exception {
// NOOP
}
@Override
public void channelOpen(ChannelHandlerContext ctx, ChannelStateEvent e)
throws Exception {
initialize(ctx);
super.channelOpen(ctx, e);
}
@Override
public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e)
throws Exception {
destroy();
super.channelOpen(ctx, e);
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e)
throws Exception {
lastReadTime = System.nanoTime();
super.messageReceived(ctx, e);
}
private void initialize(ChannelHandlerContext ctx) {
lastReadTime = System.nanoTime();
task = new ReadTimeoutTask(ctx);
timeout = timer.newTimeout(task, timeoutNanos, TimeUnit.NANOSECONDS);
}
private void destroy() {
if (timeout != null) {
timeout.cancel();
}
timeout = null;
task = null;
}
private class ReadTimeoutTask implements TimerTask {
private final ChannelHandlerContext ctx;
ReadTimeoutTask(ChannelHandlerContext ctx) {
this.ctx = ctx;
}
public void run(Timeout timeout) throws Exception {
if (timeout.isCancelled()) {
return;
}
long currentTime = System.nanoTime();
long nextDelay = timeoutNanos - (currentTime - lastReadTime);
if (nextDelay <= 0) {
// Read timed out - set a new timeout and notify the callback.
timeout = timer.newTimeout(this, timeoutNanos, TimeUnit.NANOSECONDS);
Channels.fireExceptionCaught(ctx, EXCEPTION);
} else {
// Read occurred before the timer - set a new timeout with shorter delay.
timeout = timer.newTimeout(this, nextDelay, TimeUnit.NANOSECONDS);
}
}
}
}