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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.asset;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
/**
* <code>ThreadingManager</code> manages the threads used to load content
* within the Content Manager system. A pool of threads and a task queue
* is used to load resource data and perform I/O while the application's
* render thread is active.
*/
public class ThreadingManager {
protected final ExecutorService executor =
Executors.newFixedThreadPool(2,
new LoadingThreadFactory());
protected final AssetManager owner;
protected int nextThreadId = 0;
public ThreadingManager(AssetManager owner){
this.owner = owner;
}
protected class LoadingThreadFactory implements ThreadFactory {
public Thread newThread(Runnable r) {
Thread t = new Thread(r, "pool" + (nextThreadId++));
t.setDaemon(true);
t.setPriority(Thread.MIN_PRIORITY);
return t;
}
}
protected class LoadingTask implements Callable<Object> {
private final String resourceName;
public LoadingTask(String resourceName){
this.resourceName = resourceName;
}
public Object call() throws Exception {
return owner.loadAsset(new AssetKey(resourceName));
}
}
// protected class MultiLoadingTask implements Callable<Void> {
// private final String[] resourceNames;
// public MultiLoadingTask(String[] resourceNames){
// this.resourceNames = resourceNames;
// }
// public Void call(){
// owner.loadContents(resourceNames);
// return null;
// }
// }
// public Future<Void> loadContents(String ... names){
// return executor.submit(new MultiLoadingTask(names));
// }
// public Future<Object> loadContent(String name) {
// return executor.submit(new LoadingTask(name));
// }
public static boolean isLoadingThread() {
return Thread.currentThread().getName().startsWith("pool");
}
}
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