Commit missing file

This commit is contained in:
Norman Maurer 2012-03-06 20:06:29 +01:00
parent caff7c941b
commit fd7e165fb6

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/*
* Copyright 2011 The Netty Project
*
* 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 io.netty.channel.socket.nio;
import io.netty.channel.Channel;
import io.netty.channel.socket.Worker;
import io.netty.util.ExternalResourceReleasable;
import io.netty.util.internal.ExecutorUtil;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Abstract base class for {@link WorkerPool} implementations that create the {@link Worker}'s up-front and return them in a "fair" fashion when calling
* {@link #nextWorker()}
*
*/
public abstract class AbstractNioWorkerPool<E extends AbstractNioWorker> implements WorkerPool<E> , ExternalResourceReleasable {
private final AbstractNioWorker[] workers;
private final AtomicInteger workerIndex = new AtomicInteger();
private final Executor workerExecutor;
/**
* Create a new instance
*
* @param workerExecutor the {@link Executor} to use for the {@link Worker}'s
* @param allowShutdownOnIdle allow the {@link Worker}'s to shutdown when there is not {@link Channel} is registered with it
* @param workerCount the count of {@link Worker}'s to create
*/
AbstractNioWorkerPool(Executor workerExecutor, int workerCount, boolean allowShutDownOnIdle) {
if (workerExecutor == null) {
throw new NullPointerException("workerExecutor");
}
if (workerCount <= 0) {
throw new IllegalArgumentException(
"workerCount (" + workerCount + ") " +
"must be a positive integer.");
}
workers = new AbstractNioWorker[workerCount];
for (int i = 0; i < workers.length; i++) {
workers[i] = createWorker(workerExecutor, allowShutDownOnIdle);
}
this.workerExecutor = workerExecutor;
}
/**
* Create a new {@link Worker} which uses the given {@link Executor} to service IO
*
*
* @param executor the {@link Executor} to use
* @param allowShutdownOnIdle allow the {@link Worker} to shutdown when there is not {@link Channel} is registered with it
* @return worker the new {@link Worker}
*/
protected abstract E createWorker(Executor executor, boolean allowShutdownOnIdle);
@SuppressWarnings("unchecked")
public E nextWorker() {
return (E) workers[Math.abs(workerIndex.getAndIncrement() % workers.length)];
}
@Override
public void releaseExternalResources() {
ExecutorUtil.terminate(workerExecutor);
}
}