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.Timeout;
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*/ {

        public static class TimerInfo implements Serializable {
                static final long serialVersionUID = 1L;

                private long start = System.currentTimeMillis();

                public long getStart() {
                        return start;
                }

        }

        private int count; //storing shared data like this is not recommended !!!

        @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 );

                count = 0;
                
        }
        
        //@Override if we used TimedObject interface
        //public void ejbTimeout(Timer timer) {

        @Timeout
        public void myEjbTimeout(Timer timer) {

                TimerInfo info = (TimerInfo) timer.getInfo();
                
                //any updates to the info object is not pushed back to the timer services
                
                System.out.print("timeout .... " + count + " / " + info.getStart() );
                count++;
                
                if (count >= 10) {
                        timer.cancel();
                }
        }

}
1	torben	1279	package dk.thoerup.schedulesamples;
2
3	torben	1300	import java.io.Serializable;
4
5	torben	1280	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	torben	1279	import javax.ejb.Stateless;
12			import javax.ejb.TimedObject;
13	torben	1301	import javax.ejb.Timeout;
14	torben	1279	import javax.ejb.Timer;
15	torben	1280	import javax.ejb.TimerService;
16	torben	1279
17	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
18	torben	1298	* cd <glassfishv3>/glassfish/domains/domain1/lib/databases/ejbtimer
19	torben	1280	* /usr/lib/jvm/java-6-sun/db/bin/ij
20			* connect 'jdbc:derby:.';
21	torben	1298	* paste content from <glassfishv3>/glassfish/lib/install/databases/ejbtimer_derby.sql
22			* and content from <glassfishv3>/glassfish/lib/install/databases/upgrade/ejbtimer_upgrade_derby.sql (need the applicationID column)
23			* after this make sure that all the files are owned by the user your GFv3 instance is running as
24	torben	1280	* */
25
26	torben	1298	@Stateless
27	torben	1301	public class TimedEjb /implements TimedObject/ {
28	torben	1279
29	torben	1301	public static class TimerInfo implements Serializable {
30			static final long serialVersionUID = 1L;
31
32			private long start = System.currentTimeMillis();
33
34			public long getStart() {
35			return start;
36			}
37
38	torben	1299	}
39
40	torben	1301	private int count; //storing shared data like this is not recommended !!!
41
42	torben	1280	@Resource
43			private SessionContext sessionCtx;
44	torben	1279
45	torben	1280	public void startTimer() {
46	torben	1281
47	torben	1280	TimerService timerService = sessionCtx.getTimerService();
48
49	torben	1299	TimerInfo info = new TimerInfo(); //the info object is not necessary - but can be used to store data with the timer
50	torben	1281
51	torben	1299	//Timer timer = timerService.createTimer( (5 * 1000), info); //singleshot timer
52			timerService.createTimer(10*1000, 5000, info ); //repeating timer
53	torben	1280
54			// otherwise use schedule expression to create more complex schedules
55			// in this case fire once every minute when the seconds is == 10
56	torben	1281	//ScheduleExpression se = new ScheduleExpression().second(10).minute("").hour("");
57			//System.out.println(se.toString());
58			//timerService.createCalendarTimer( se );
59	torben	1301
60			count = 0;
61	torben	1280
62			}
63
64	torben	1301	//@Override if we used TimedObject interface
65			//public void ejbTimeout(Timer timer) {
66	torben	1299
67	torben	1301	@Timeout
68			public void myEjbTimeout(Timer timer) {
69
70	torben	1299	TimerInfo info = (TimerInfo) timer.getInfo();
71	torben	1281
72	torben	1301	//any updates to the info object is not pushed back to the timer services
73	torben	1281
74	torben	1301	System.out.print("timeout .... " + count + " / " + info.getStart() );
75			count++;
76	torben	1281
77	torben	1301	if (count >= 10) {
78	torben	1281	timer.cancel();
79			}
80	torben	1279	}
81
82			}