thoerup/schedulesamples/TimedEjb.java

package dk.thoerup.schedulesamples;

import java.io.Serializable;

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	package dk.thoerup.schedulesamples;
2
3	import java.io.Serializable;
4
5	import java.util.Calendar;
6	import java.util.Date;
7
8	import javax.annotation.Resource;
9	import javax.ejb.ScheduleExpression;
10	import javax.ejb.SessionContext;
11	import javax.ejb.Stateless;
12	import javax.ejb.TimedObject;
13	import javax.ejb.Timer;
14	import javax.ejb.TimerService;
15
16	/* GFv3: before using a timed bean make sure the ejb timer service is correctly configured with a datasource and the timer table is created
17	* cd <glassfishv3>/glassfish/domains/domain1/lib/databases/ejbtimer
18	* /usr/lib/jvm/java-6-sun/db/bin/ij
19	* connect 'jdbc:derby:.';
20	* paste content from <glassfishv3>/glassfish/lib/install/databases/ejbtimer_derby.sql
21	* and content from <glassfishv3>/glassfish/lib/install/databases/upgrade/ejbtimer_upgrade_derby.sql (need the applicationID column)
22	* after this make sure that all the files are owned by the user your GFv3 instance is running as
23	* */
24
25	@Stateless
26	public class TimedEjb implements TimedObject {
27
28	class TimerInfo implements Serializable {
29	public int count;
30	}
31
32	@Resource
33	private SessionContext sessionCtx;
34
35	public void startTimer() {
36
37	TimerService timerService = sessionCtx.getTimerService();
38
39	TimerInfo info = new TimerInfo(); //the info object is not necessary - but can be used to store data with the timer
40
41	//Timer timer = timerService.createTimer( (5 * 1000), info); //singleshot timer
42	timerService.createTimer(10*1000, 5000, info ); //repeating timer
43
44	// otherwise use schedule expression to create more complex schedules
45	// in this case fire once every minute when the seconds is == 10
46	//ScheduleExpression se = new ScheduleExpression().second(10).minute("").hour("");
47	//System.out.println(se.toString());
48	//timerService.createCalendarTimer( se );
49
50	}
51
52	@Override
53	public void ejbTimeout(Timer timer) {
54
55	TimerInfo info = (TimerInfo) timer.getInfo();
56
57	info.count++;
58
59	System.out.print("timeout .... " + info.count);
60
61
62	if (info.count >= 10) {
63	timer.cancel();
64	}
65	}
66
67	}