View Javadoc
1   /*
2    * JBoss, Home of Professional Open Source
3    * Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual
4    * contributors by the @authors tag. See the copyright.txt in the
5    * distribution for a full listing of individual contributors.
6    *
7    * Licensed under the Apache License, Version 2.0 (the "License");
8    * you may not use this file except in compliance with the License.
9    * You may obtain a copy of the License at
10   * http://www.apache.org/licenses/LICENSE-2.0
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  package org.jboss.as.quickstarts.ejbTimer;
18  
19  import java.text.SimpleDateFormat;
20  import java.util.Date;
21  import javax.annotation.PostConstruct;
22  import javax.annotation.PreDestroy;
23  import javax.annotation.Resource;
24  import javax.ejb.*;
25  import javax.interceptor.InvocationContext;
26  
27  
28  /**
29   * Demonstrates how to use the EJB's @Timeout.
30   * 
31   * @author <a href="mailto:ozizka@redhat.com">Ondrej Zizka</a>
32   */
33  @Singleton
34  @Startup
35  public class TimeoutExample {
36  
37      @Resource
38      private TimerService timerService;
39      
40      @Timeout
41      public void scheduler(Timer timer) {
42          Date currentTime = new Date();
43          SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy.MM.dd G 'at' HH:mm:ss z");
44          System.out.println("TimeoutExample.scheduler() " + timer.getInfo() + simpleDateFormat.format(currentTime));
45      }
46      
47      @PostConstruct
48      public void initialize( InvocationContext ctx ) {
49          ScheduleExpression se = new ScheduleExpression();
50          // Set schedule to every 3 seconds (starting at second 0 of every minute).
51          se.hour("*").minute("*").second("0/3");
52           timerService.createCalendarTimer( se, new TimerConfig("EJB timer service timeout at ", false) );
53      }
54      
55      @PreDestroy
56      public void stop() {    
57          System.out.println("EJB Timer: Stop timers.");
58          for (Timer timer : timerService.getTimers()) {
59              System.out.println("Stopping timer: " + timer.getInfo());
60              timer.cancel();
61          }
62      }
63  }