[jboss-user] [EJB/JBoss] - TimerService and Timer

Hello, I need to create repetitive task using EJB in JBoss 4.0.5. I decide to use TimerService and Timer as introduced in the EJB 2.1 specification. Here is the bean code: | /** | * @author Stanislav Gardon | * @ejb.bean description = "OnlineTerminalsStat" display-name = | * "OnlineTerminalsStat" type = "Stateless" name = | * "OnlineTerminalsStat" view-type = "local" local-jndi-name = | * "local/OnlineTerminalsStat" transaction-type = "Container" generate = | * "true" | */ | public class OnlineTerminalsStatBean implements SessionBean, TimedObject { | | /** | * Interval spustania | */ | private static final long INTERVAL_DURATION = 5000; | | /** | * Aktualny SessionContext | */ | private SessionContext sessionContext; | | /** | * Logger | */ | private Logger logger = Logger.getLogger(OnlineTerminalsStatBean.class); | | /** | * | */ | public OnlineTerminalsStatBean() { | super(); | } | | /* | * (non-Javadoc) | * | * @see javax.ejb.SessionBean#ejbActivate() | */ | public void ejbActivate() throws EJBException, RemoteException { | } | | /* | * (non-Javadoc) | * | * @see javax.ejb.SessionBean#ejbPassivate() | */ | public void ejbPassivate() throws EJBException, RemoteException { | } | | /* | * (non-Javadoc) | * | * @see javax.ejb.SessionBean#ejbRemove() | */ | public void ejbRemove() throws EJBException, RemoteException { | } | | /** | * | * @throws CreateException | * @ejb.create-method view-type = "local" | */ | public void ejbCreate() throws CreateException { | } | | /* | * (non-Javadoc) | * | * @see javax.ejb.SessionBean#setSessionContext(javax.ejb.SessionContext) | */ | public void setSessionContext(SessionContext arg0) throws EJBException, | RemoteException { | this.sessionContext = arg0; | } | | /** | * | * @ejb.interface-method view-type = "local" | * @ejb.transaction type = "Required" | */ | public void createTimer() { | TimerService ts = sessionContext.getTimerService(); | Timer t = ts.createTimer(new Date(System.currentTimeMillis() + 5000), | INTERVAL_DURATION, null); | logger.debug("timer created"); | logger.debug("total timers: " + ts.getTimers().size()); | } | | /** | * @see javax.ejb.TimedObject#ejbTimeout(javax.ejb.Timer) | * @ejb.interface-method view-type = "local" | * @ejb.transaction type = "RequiresNew" | */ | public void ejbTimeout(Timer t) { | logger.debug("ejbTimout, Timer: " + t); | try { | DataSource ds = DbUtil.dataSourceTx(); | Connection c = ds.getConnection(); | try { | String query = "BEGIN terminal_tools.save_terminal_online_stat; END;"; | CallableStatement cs = c.prepareCall(query); | try { | cs.execute(); | } finally { | cs.close(); | } | } finally { | c.close(); | } | } catch (Exception e) { | logger.error(e.getMessage(), e); | } | } | | } | The createTimer method is called just right after deployment. The problem is, that ejbTimout method is called by more than 10 timers each second (see log bellow). But I create only ONE timer. Why? Do you have any ideas? Log: | 10:33:03,814 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] timer created | 10:33:03,814 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] total timers: 13 | . | . | . | Why 13? | 10:41:05,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:06,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:07,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:08,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:08,814 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=13,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=5000,periode=5000,in_timeout] | 10:41:09,486 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=2,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-507547,periode=5000,in_timeout] | 10:41:09,486 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=3,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-150109,periode=5000,in_timeout] | 10:41:09,502 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=5,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-64654002,periode=5000,in_timeout] | 10:41:09,533 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=6,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-64518924,periode=5000,in_timeout] | 10:41:09,564 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=7,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-64031721,periode=5000,in_timeout] | 10:41:09,596 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=9,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-2566375,periode=5000,in_timeout] | 10:41:09,658 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=12,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-69297,periode=5000,in_timeout] | 10:41:09,705 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=11,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-578453,periode=5000,in_timeout] | 10:41:09,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:10,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:11,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:12,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:13,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | 10:41:13,814 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=13,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=5000,periode=5000,in_timeout] | 10:41:14,486 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=2,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-507547,periode=5000,in_timeout] | 10:41:14,486 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=3,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-150109,periode=5000,in_timeout] | 10:41:14,502 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=5,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-64654002,periode=5000,in_timeout] | 10:41:14,533 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=6,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-64518924,periode=5000,in_timeout] | 10:41:14,564 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=7,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-64031721,periode=5000,in_timeout] | 10:41:14,596 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=9,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-2566375,periode=5000,in_timeout] | 10:41:14,658 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=12,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-69297,periode=5000,in_timeout] | 10:41:14,705 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=11,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-578453,periode=5000,in_timeout] | 10:41:14,721 DEBUG [com.play4win.terminal.ejb.OnlineTerminalsStatBean] ejbTimout, Timer: [id=10,target=[target=jboss.j2ee:jndiName=local/OnlineTerminalsStat,service=EJB],remaining=-65206112,periode=1000,in_timeout] | Why ejbTimeout is called so many times? Thanks for any help. Stan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4044603#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...