LifeCycleCompletionService.java
/*
* Copyright (C) 2003-2011 eXo Platform SAS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.exoplatform.social.common.lifecycle;
import java.util.concurrent.Callable;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.picocontainer.Startable;
import org.exoplatform.container.xml.InitParams;
import org.exoplatform.container.xml.ValueParam;
/**
* Process the callable request out of the http request.
*
* @author <a href="mailto:alain.defrance@exoplatform.com">Alain Defrance</a>
* @version $Revision$
*/
public class LifeCycleCompletionService implements Startable {
private final String THREAD_NUMBER_KEY = "thread-number";
private final String ASYNC_EXECUTION_KEY = "async-execution";
private Executor executor;
private ExecutorCompletionService ecs;
private final int DEFAULT_THREAD_NUMBER = 1;
private final boolean DEFAULT_ASYNC_EXECUTION = true;
private int configThreadNumber;
private boolean configAsyncExecution;
public LifeCycleCompletionService(InitParams params) {
//
ValueParam threadNumber = params.getValueParam(THREAD_NUMBER_KEY);
ValueParam asyncExecution = params.getValueParam(ASYNC_EXECUTION_KEY);
//
try {
this.configThreadNumber = Integer.valueOf(threadNumber.getValue());
}
catch (Exception e) {
this.configThreadNumber = DEFAULT_THREAD_NUMBER;
}
//
try {
this.configAsyncExecution = Boolean.valueOf(asyncExecution.getValue());
}
catch (Exception e) {
this.configAsyncExecution = DEFAULT_ASYNC_EXECUTION;
}
//
if (configAsyncExecution) {
this.executor = Executors.newFixedThreadPool(this.configThreadNumber);
}
else {
this.executor = new DirectExecutor();
}
//
this.ecs = new ExecutorCompletionService(executor);
}
public void addTask(Callable callable) {
ecs.submit(callable);
}
public void waitCompletionFinished() {
try {
if (executor instanceof ExecutorService) {
((ExecutorService) executor).awaitTermination(1, TimeUnit.SECONDS);
}
}
catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
public boolean isAsync() {
return this.configAsyncExecution;
}
public void start() {}
public void stop() {
if (executor instanceof ExecutorService) {
((ExecutorService) executor).shutdown();
}
};
private class DirectExecutor implements Executor {
public void execute(final Runnable runnable) {
if (Thread.interrupted()) throw new RuntimeException();
runnable.run();
}
}
}