thoerup/schedulesamples/TimedEjb.java

package dk.thoerup.schedulesamples;

import java.util.Calendar;
import java.util.Date;

import javax.annotation.Resource;
import javax.ejb.ScheduleExpression;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
import javax.ejb.TimedObject;
import javax.ejb.Timer;
import javax.ejb.TimerService;

/* GFv3: before using a timed bean make sure the ejb timer service is correctly configured with a datasource and the timer table is created
 * cd <glassfishv3>/glassfish/domains/domain1/lib/databases/ejbtimer 
 * /usr/lib/jvm/java-6-sun/db/bin/ij
 * connect 'jdbc:derby:.';
 * paste content from <glassfishv3>/glassfish/lib/install/databases/ejbtimer_derby.sql 
 * and content from <glassfishv3>/glassfish/lib/install/databases/upgrade/ejbtimer_upgrade_derby.sql (need the applicationID column)
 * after this make sure that all the files are owned by the user your GFv3 instance is running as
 * */ 

@Stateless
public class TimedEjb implements TimedObject {

        class TimerInfo implements Serializable {
                public int count;
        }

        @Resource
        private SessionContext sessionCtx;
        
        public void startTimer() {
                
                TimerService timerService = sessionCtx.getTimerService();
                
                TimerInfo info = new TimerInfo(); //the info object is not necessary - but can be used to store data with the timer

                //Timer timer = timerService.createTimer( (5 * 1000), info); //singleshot timer
                timerService.createTimer(10*1000, 5000, info ); //repeating timer
                
                // otherwise use schedule expression to create more complex schedules
                // in this case fire once every minute when the seconds is == 10
                //ScheduleExpression se = new ScheduleExpression().second(10).minute("*").hour("*");            
                //System.out.println(se.toString());
                //timerService.createCalendarTimer( se );
                
        }
        
        @Override
        public void ejbTimeout(Timer timer) {

                TimerInfo info = (TimerInfo) timer.getInfo();
                
                info.count++;
                
                System.out.print("timeout .... " + info.count);
                
                
                if (info.count >= 10) {
                        timer.cancel();
                }
        }

}
1	torben	1279	package dk.thoerup.schedulesamples;
2
3	torben	1280	import java.util.Calendar;
4			import java.util.Date;
5
6			import javax.annotation.Resource;
7			import javax.ejb.ScheduleExpression;
8			import javax.ejb.SessionContext;
9	torben	1279	import javax.ejb.Stateless;
10			import javax.ejb.TimedObject;
11			import javax.ejb.Timer;
12	torben	1280	import javax.ejb.TimerService;
13	torben	1279
14	torben	1280	/* GFv3: before using a timed bean make sure the ejb timer service is correctly configured with a datasource and the timer table is created
15	torben	1298	* cd <glassfishv3>/glassfish/domains/domain1/lib/databases/ejbtimer
16	torben	1280	* /usr/lib/jvm/java-6-sun/db/bin/ij
17			* connect 'jdbc:derby:.';
18	torben	1298	* paste content from <glassfishv3>/glassfish/lib/install/databases/ejbtimer_derby.sql
19			* and content from <glassfishv3>/glassfish/lib/install/databases/upgrade/ejbtimer_upgrade_derby.sql (need the applicationID column)
20			* after this make sure that all the files are owned by the user your GFv3 instance is running as
21	torben	1280	* */
22
23	torben	1298	@Stateless
24	torben	1280	public class TimedEjb implements TimedObject {
25	torben	1279
26	torben	1299	class TimerInfo implements Serializable {
27			public int count;
28			}
29
30	torben	1280	@Resource
31			private SessionContext sessionCtx;
32	torben	1279
33	torben	1280	public void startTimer() {
34	torben	1281
35	torben	1280	TimerService timerService = sessionCtx.getTimerService();
36
37	torben	1299	TimerInfo info = new TimerInfo(); //the info object is not necessary - but can be used to store data with the timer
38	torben	1281
39	torben	1299	//Timer timer = timerService.createTimer( (5 * 1000), info); //singleshot timer
40			timerService.createTimer(10*1000, 5000, info ); //repeating timer
41	torben	1280
42			// otherwise use schedule expression to create more complex schedules
43			// in this case fire once every minute when the seconds is == 10
44	torben	1281	//ScheduleExpression se = new ScheduleExpression().second(10).minute("").hour("");
45			//System.out.println(se.toString());
46			//timerService.createCalendarTimer( se );
47	torben	1280
48			}
49
50			@Override
51	torben	1279	public void ejbTimeout(Timer timer) {
52	torben	1299
53			TimerInfo info = (TimerInfo) timer.getInfo();
54	torben	1281
55	torben	1299	info.count++;
56	torben	1281
57	torben	1299	System.out.print("timeout .... " + info.count);
58	torben	1281
59
60	torben	1299	if (info.count >= 10) {
61	torben	1281	timer.cancel();
62			}
63	torben	1279	}
64
65			}