/*
* Copyright 2012 The Netty Project
* 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.*;
import org.fusesource.hawtdispatch.DispatchQueue;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
/**
* {@link AbstractHawtEventLoopGroup} implementation which use pre-created shared serial {@link DispatchQueue}s
* between the registered {@link Channel}s.
*
* @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
*/
public class SharedHawtEventLoopGroup extends AbstractHawtEventLoopGroup {
private static final AtomicInteger poolId = new AtomicInteger();
private final EventLoop[] children;
private final AtomicInteger childIndex = new AtomicInteger();
/**
* Create a new instance
*
* @param queue the {@link DispatchQueue} from which the serial {@link DispatchQueue}s will be created.
* @param queueNumber the number of serial {@link DispatchQueue}s created from the given {@link DispatchQueue}
*/
public SharedHawtEventLoopGroup(DispatchQueue queue, int queueNumber) {
if (queueNumber < 1) {
throw new IllegalArgumentException("queueNumber must be >= 1");
}
if (queue == null) {
throw new NullPointerException("queue");
}
children = new EventLoop[queueNumber];
for (int i = 0; i < queueNumber; i++) {
children[i] = new HawtEventLoop(this, queue.createQueue(poolId.get() + "-" + i));
}
}
@Override
public EventLoop next() {
return children[Math.abs(childIndex.getAndIncrement() % children.length)];
}
@Override
protected Set<EventExecutor> children() {
Set<EventExecutor> children = Collections.newSetFromMap(new LinkedHashMap<EventExecutor, Boolean>());
Collections.addAll(children, this.children);
return children;
}
}