1 /***
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.codehaus.activemq.util;
19
20 import EDU.oswego.cs.dl.util.concurrent.Executor;
21 import EDU.oswego.cs.dl.util.concurrent.PooledExecutor;
22 import org.apache.commons.logging.Log;
23 import org.apache.commons.logging.LogFactory;
24 import org.codehaus.activemq.service.Service;
25
26 import javax.jms.JMSException;
27
28 /***
29 * A helper class for working with {@link Executor} objects
30 *
31 * @version $Revision: 1.1 $
32 */
33 public class ExecutorHelper {
34 private static final Log log = LogFactory.getLog(ExecutorHelper.class);
35
36 /***
37 * A helper method to stop the execution of an executor
38 *
39 * @param executor the executor or null if one is not created yet
40 */
41 public static void stopExecutor(Executor executor) throws InterruptedException, JMSException {
42 if (executor instanceof Service) {
43 Service service = (Service) executor;
44 service.stop();
45 }
46 else if (executor instanceof PooledExecutor) {
47 PooledExecutor pe = (PooledExecutor) executor;
48 pe.shutdownAfterProcessingCurrentlyQueuedTasks();
49
50 pe.awaitTerminationAfterShutdown();
51 }
52 else if (executor != null) {
53 log.warn("Don't know how to cleanly close down the given executor: " + executor
54 + ". Consider deriving from this class to implement the Service interface to shut down cleanly");
55 }
56 }
57
58 }