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 }