/**
* Copyright (C) 2012 FuseSource, Inc.
* http://fusesource.com
*
* Licensed 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;
import java.util.LinkedList;
import java.util.concurrent.Executor;
import static org.fusesource.hawtdispatch.Dispatch.*;
/**
* Sends runnable tasks to a DispatchQueue via a an EventAggregator
* so that they first batch up on the sender side before being
* sent to the DispatchQueue which then executes that tasks.
*
* @author <a href="http://hiramchirino.com">Hiram Chirino</a>
*/
public class AggregatingExecutor implements Executor {
final DispatchQueue queue;
final CustomDispatchSource<Runnable, LinkedList<Runnable>> source;
public AggregatingExecutor(DispatchQueue queue) {
this.queue = queue;
this.source = createSource(EventAggregators.<Runnable>linkedList(), queue);
this.source.setEventHandler(new Task() {
public void run() {
for (Runnable runnable: source.getData() ) {
try {
runnable.run();
} catch (Exception e) {
Thread thread = Thread.currentThread();
thread.getUncaughtExceptionHandler().uncaughtException(thread, e);
}
}
}
});
this.source.resume();
}
public void suspend() {
source.suspend();
}
public void resume() {
source.resume();
}
public void execute(Runnable task) {
if (getCurrentQueue() == null) {
queue.execute(new TaskWrapper(task));
} else {
source.merge(task);
}
}
}