001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 **/
018 package org.activemq.util;
019
020 import EDU.oswego.cs.dl.util.concurrent.Executor;
021 import EDU.oswego.cs.dl.util.concurrent.PooledExecutor;
022 import org.apache.commons.logging.Log;
023 import org.apache.commons.logging.LogFactory;
024 import org.activemq.service.Service;
025
026 import javax.jms.JMSException;
027
028 /**
029 * A helper class for working with {@link Executor} objects
030 *
031 * @version $Revision: 1.1.1.1 $
032 */
033 public class ExecutorHelper {
034 private static final Log log = LogFactory.getLog(ExecutorHelper.class);
035
036 /**
037 * A helper method to stop the execution of an executor
038 *
039 * @param executor the executor or null if one is not created yet
040 */
041 public static void stopExecutor(Executor executor) throws InterruptedException, JMSException {
042 if (executor instanceof Service) {
043 Service service = (Service) executor;
044 service.stop();
045 }
046 else if (executor instanceof PooledExecutor) {
047 PooledExecutor pe = (PooledExecutor) executor;
048 pe.shutdownAfterProcessingCurrentlyQueuedTasks();
049 //pe.shutdownNow();
050 // Wait up to 5 seconds of the threads to shutdown..
051 pe.awaitTerminationAfterShutdown(1000*5);
052 }
053 else if (executor != null) {
054 log.warn("Don't know how to cleanly close down the given executor: " + executor
055 + ". Consider deriving from this class to implement the Service interface to shut down cleanly");
056 }
057 }
058
059 }