/**
* The MIT License
* Copyright (c) 2014-2016 Ilkka Seppälä
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.reactor.framework;
import java.nio.channels.SelectionKey;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/**
* An implementation that uses a pool of worker threads to dispatch the events. This provides better
* scalability as the application specific processing is not performed in the context of I/O
* (reactor) thread.
*/
public class ThreadPoolDispatcher implements Dispatcher {
private final ExecutorService executorService;
/**
* Creates a pooled dispatcher with tunable pool size.
*
* @param poolSize number of pooled threads
*/
public ThreadPoolDispatcher(int poolSize) {
this.executorService = Executors.newFixedThreadPool(poolSize);
}
/**
* Submits the work of dispatching the read event to worker pool, where it gets picked up by
* worker threads. <br/>
* Note that this is a non-blocking call and returns immediately. It is not guaranteed that the
* event has been handled by associated handler.
*/
@Override
public void onChannelReadEvent(AbstractNioChannel channel, Object readObject, SelectionKey key) {
executorService.execute(() -> channel.getHandler().handleChannelRead(channel, readObject, key));
}
/**
* Stops the pool of workers.
*
* @throws InterruptedException if interrupted while stopping pool of workers.
*/
@Override
public void stop() throws InterruptedException {
executorService.shutdown();
executorService.awaitTermination(4, TimeUnit.SECONDS);
}
}