/* 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.activiti.engine.impl.jobexecutor;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import javax.enterprise.concurrent.ManagedThreadFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Simple JSR-236 job executor to allocate threads through {@link ManagedThreadFactory}. Falls back to {@link DefaultJobExecutor}
* when a thread factory was not referenced in configuration.
*
* In Java EE 7, all application servers should provide access to a {@link ManagedThreadFactory}.
*
* @author Dimitris Mandalidis
*/
public class ManagedJobExecutor extends DefaultJobExecutor {
private static Logger log = LoggerFactory.getLogger(ManagedJobExecutor.class);
protected ManagedThreadFactory threadFactory;
public ManagedThreadFactory getThreadFactory() {
return threadFactory;
}
public void setThreadFactory(ManagedThreadFactory threadFactory) {
this.threadFactory = threadFactory;
}
@Override
protected void startExecutingJobs() {
if (threadFactory == null) {
log.warn("A managed thread factory was not found, falling back to self-managed threads");
super.startExecutingJobs();
} else {
if (threadPoolQueue==null) {
threadPoolQueue = new ArrayBlockingQueue<Runnable>(queueSize);
}
if (threadPoolExecutor==null) {
threadPoolExecutor = new ThreadPoolExecutor(corePoolSize, maxPoolSize, keepAliveTime, TimeUnit.MILLISECONDS, threadPoolQueue, threadFactory);
threadPoolExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
}
startJobAcquisitionThread();
}
}
}