/*
* Copyright 2013 Red Hat, Inc.
*
* The Netty Project licenses this file to you 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 org.fusesource.hawtdispatch.netty;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelPromise;
import io.netty.channel.EventExecutor;
import io.netty.channel.EventLoop;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import org.fusesource.hawtdispatch.DispatchQueue;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
/**
* {@link AbstractHawtEventLoopGroup} which will create a new serial {@link DispatchQueue} for every registered
* {@link Channel}.
*
* @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
*/
public class HawtEventLoopGroup extends AbstractHawtEventLoopGroup {
private final ChannelGroup group = new DefaultChannelGroup();
private final DispatchQueue queue;
private final AtomicInteger eventLoopId = new AtomicInteger();
private final ChannelFutureListener closeListener = new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
group.remove(future.channel());
}
};
private final ChannelFutureListener registerListener = new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
if (future.isSuccess() && future.channel().isOpen()) {
group.add(future.channel());
future.channel().closeFuture().addListener(closeListener);
}
}
};
/**
* Create a new instance
*
* @param queue the {@link DispatchQueue} from which the serial queues are created
*/
public HawtEventLoopGroup(DispatchQueue queue) {
if (queue == null) {
throw new NullPointerException("queue");
}
this.queue = queue;
}
@Override
public ChannelFuture register(Channel channel, ChannelPromise promise) {
ChannelFuture future = super.register(channel, promise);
future.addListener(registerListener);
return future;
}
@Override
protected Set<EventExecutor> children() {
Set<EventExecutor> executors = new HashSet<EventExecutor>(group.size());
for (Channel channel: group) {
executors.add(channel.eventLoop());
}
return executors;
}
@Override
public EventLoop next() {
return new HawtEventLoop(this, queue.createQueue(HawtEventLoopGroup.class.getSimpleName() + '-' + eventLoopId.incrementAndGet()));
}
}