2 * Copyright 2006 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.wamblee.timer;
19 import java.util.Collection;
21 import javax.annotation.Resource;
22 import javax.ejb.MessageDriven;
23 import javax.ejb.Timeout;
24 import javax.ejb.Timer;
25 import javax.ejb.TimerService;
26 import javax.ejb.TransactionAttribute;
27 import javax.ejb.TransactionAttributeType;
28 import javax.ejb.TransactionManagement;
29 import javax.ejb.TransactionManagementType;
30 import javax.jms.JMSException;
31 import javax.jms.Message;
32 import javax.jms.MessageListener;
33 import javax.jms.ObjectMessage;
34 import javax.jms.StreamMessage;
36 import org.apache.commons.logging.Log;
37 import org.apache.commons.logging.LogFactory;
38 import org.wamblee.general.BeanKernel;
39 import org.wamblee.io.DirectoryMonitor;
44 * @author Erik Brakkee
46 @MessageDriven(name = "TimerBean")
47 // Spring's JTA transaction manager does not work with container managed transactions
48 // because it uses the UserTransaction object which glassfish forbids.
49 @TransactionManagement(TransactionManagementType.BEAN)
50 public class TimerBean implements MessageListener {
52 private static final Log LOG = LogFactory.getLog(TimerBean.class);
55 private TimerService _timerService;
58 * Initialization of the time interval. The initialization is done through a
59 * StreamMessage with a single integer containing the time interval to use.
61 public void onMessage(Message aInitMessage) {
62 ObjectMessage msg = (ObjectMessage) aInitMessage;
64 int interval = (Integer)msg.getObject();
65 LOG.info("Initializing timer with interval " + interval + " seconds");
66 for (Timer timer: (Collection<Timer>)_timerService.getTimers()) {
67 LOG.info("Canceling old timers: " + timer);
70 _timerService.createTimer(1000, interval*1000, null);
71 } catch (JMSException e) {
72 throw new RuntimeException(e.getMessage());
77 private void timeout(Timer aTimer) {
78 LOG.info("Timer expired!!!");
80 DirectoryMonitor monitor = BeanKernel.getBeanFactory().find(
81 DirectoryMonitor.class);
83 } catch (Throwable t) {
86 "something terrible happend, ignoring it and hoping for the best",