Example usage for javax.ejb Timer getNextTimeout

Introduction

In this page you can find the example usage for javax.ejb Timer getNextTimeout.

Prototype

public Date getNextTimeout() throws java.lang.IllegalStateException, javax.ejb.NoSuchObjectLocalException,
        javax.ejb.NoMoreTimeoutsException, javax.ejb.EJBException;

Source Link

Document

Get the point in time at which the next timer expiration is scheduled to occur.

Usage

From source file:edu.harvard.iq.dvn.core.index.IndexServiceBean.java

public void createIndexNotificationTimer() {
    for (Iterator it = timerService.getTimers().iterator(); it.hasNext();) {
        Timer timer = (Timer) it.next();
        if (timer.getInfo().equals(INDEX_NOTIFICATION_TIMER)) {
            logger.info("Cannot create IndexNotificationTimer, timer already exists.");
            logger.info("IndexNotificationTimer next timeout is " + timer.getNextTimeout());
            return;
        }/*from ww  w  . java 2  s  .c  o  m*/
    }
    Calendar cal = Calendar.getInstance();
    cal.add(Calendar.DAY_OF_YEAR, 1);
    cal.set(Calendar.HOUR_OF_DAY, 15);

    logger.log(Level.INFO, "Indexer notification timer set for " + cal.getTime());
    Date initialExpiration = cal.getTime(); // First timeout is 1:00 AM of next day
    long intervalDuration = 1000 * 60 * 60 * 24; // repeat every 24 hours
    timerService.createTimer(initialExpiration, intervalDuration, INDEX_NOTIFICATION_TIMER);

}

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From source file:org.cesecore.certificates.ocsp.OcspResponseGeneratorSessionBean.java

/**
 * Adds a timer to the bean//from ww w .  j av a  2s .c  o  m
 * 
 * @param id the id of the timer
 */
// We don't want the appserver to persist/update the timer in the same transaction if they are stored in different non XA DataSources. This method
// should not be run from within a transaction.
private Timer addTimer(long interval, Integer id) {
    if (log.isTraceEnabled()) {
        log.trace(">addTimer: " + id + ", interval: " + interval);
    }
    Timer ret = null;
    if (interval > 0) {
        ret = timerService.createTimer(interval, id);
        if (log.isTraceEnabled()) {
            log.trace("<addTimer: " + id + ", interval: " + interval + ", " + ret.getNextTimeout().toString());
        }
    }
    return ret;
}

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From source file:org.ejbca.core.ejb.services.ServiceSessionBean.java

/**
 * Method implemented from the TimerObject and is the main method of this session bean. It calls the work object for each object.
 * //from   ww w. j a v  a 2 s . com
 * @param timer timer whose expiration caused this notification.
 */
@Timeout
// Glassfish 2.1.1:
// "Timeout method ....timeoutHandler(javax.ejb.Timer)must have TX attribute of TX_REQUIRES_NEW or TX_REQUIRED or TX_NOT_SUPPORTED"
// JBoss 5.1.0.GA: We cannot mix timer updates with our EJBCA DataSource transactions.
@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
public void timeoutHandler(Timer timer) {
    if (log.isTraceEnabled()) {
        log.trace(">ejbTimeout");
    }
    final long startOfTimeOut = System.currentTimeMillis();
    long serviceInterval = IInterval.DONT_EXECUTE;
    Integer timerInfo = (Integer) timer.getInfo();
    if (timerInfo.equals(SERVICELOADER_ID)) {
        if (log.isDebugEnabled()) {
            log.debug("Running the internal Service loader.");
        }
        load();
    } else {
        String serviceName = null;
        try {
            serviceName = serviceDataSession.findNameById(timerInfo);
        } catch (Throwable t) { // NOPMD: we really need to catch everything to not risk hanging somewhere in limbo
            log.warn("Exception finding service name: ", t); // if this throws, there is a failed database or similar
            // Unexpected error (probably database related). We need to reschedule the service w a default interval.
            addTimer(30 * 1000, timerInfo);
        }
        if (serviceName == null) {
            final String msg = intres.getLocalizedMessage("services.servicenotfound", timerInfo);
            log.info(msg);
        } else {
            // Get interval of worker
            try {
                serviceInterval = serviceSession.getServiceInterval(timerInfo);
            } catch (Throwable t) { // NOPMD: we really need to catch everything to not risk hanging somewhere in limbo
                log.warn("Exception getting service interval: ", t); // if this throws, there is a failed database or similar
                // Unexpected error (probably database related). We need to reschedule the service w a default interval.
                addTimer(30 * 1000, timerInfo);
            }
            // Reschedule timer
            IWorker worker = null;
            if (serviceInterval != IInterval.DONT_EXECUTE) {
                Timer nextTrigger = addTimer(serviceInterval * 1000, timerInfo);
                try {
                    // Try to acquire lock / see if this node should run
                    worker = serviceSession.getWorkerIfItShouldRun(timerInfo,
                            nextTrigger.getNextTimeout().getTime());
                } catch (Throwable t) { // NOPMD: we really need to catch everything to not risk hanging somewhere in limbo
                    if (log.isDebugEnabled()) {
                        log.debug("Exception: ", t); // Don't spam log with stacktraces in normal production cases
                    }
                }
                if (worker != null) {
                    try {
                        serviceSession.executeServiceInNoTransaction(worker, serviceName);
                    } catch (RuntimeException e) {
                        /*
                         * If the service worker fails with a RuntimeException we need to
                         * swallow this here. If we allow it to propagate outside the
                         * ejbTimeout method it is up to the application server config how it
                         * should be retried, but we have already scheduled a new try
                         * previously in this method. We still want to log this as an ERROR
                         * since it is some kind of catastrophic failure..
                         */
                        log.error("Service worker execution failed.", e);
                    }
                } else {
                    if (log.isDebugEnabled()) {
                        Object o = timerInfo;
                        if (serviceName != null) {
                            o = serviceName;
                        }
                        final String msg = intres.getLocalizedMessage("services.servicerunonothernode", o);
                        log.debug(msg);
                    }
                }
                if (System.currentTimeMillis() - startOfTimeOut > serviceInterval * 1000) {
                    log.warn("Service '" + serviceName + "' took longer than it's configured service interval ("
                            + serviceInterval + ")."
                            + " This can trigger simultanious service execution on several nodes in a cluster."
                            + " Increase interval or lower each invocations work load.");
                }
            }
        }
    }
    if (log.isTraceEnabled()) {
        log.trace("<ejbTimeout");
    }
}

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