@Schedule(minute = "*/1", hour = "*")
public void checkTimers() {
try {
Context context = new InitialContext();
List<TimerParams> timerParams = service.getAll();
for (TimerParams entity : timerParams) {
long currentTime = Calendar.getInstance().getTimeInMillis();
long lastTimeEffectuated = entity.getLastTimeEffectuated();
// si el handler no se ha ejecutado nunca
if (lastTimeEffectuated == TimerParams.NO_TIME) {
invokeTimerHandler(context, entity, currentTime, false);
} else {
long nextTime = getNextExecutionTime(entity);
long diferenceTime = currentTime - nextTime;
if (diferenceTime >= 0) invokeTimerHandler(context, entity, currentTime, true);
}
}
} catch (Exception e) {
logger.log(Level.INFO, "Error en GHATimerService.checkTimers: ", e);
}
}
/**
* invoke the TimerHandler stored in the TimerParams entity and update the last execution time for
* this entity
*
* @param jndiContext context to made lookup of the JNDI name stored in the TimerParams entity
* @param entity the entity with the timer parameters
* @param time the new last executed time in milliseconds
* @throws GHAEJBException
* @throws NamingException
*/
private void invokeTimerHandler(
Context jndiContext, TimerParams entity, long time, boolean update)
throws GHAEJBException, NamingException {
// se la asigno al entity con los parametros del timer
entity.setLastTimeEffectuated(time);
// agrego a la BD ultima vez que se ejecuto el handler
entity = (update) ? service.update(entity) : service.save(entity);
// hago JNDI lookup del handler
TimerServiceHandler handler =
(TimerServiceHandler) jndiContext.lookup(entity.getJndiProcessorName());
// ejecuto el handler
handler.doWork(entity);
}
/**
* Return the next excecution time for the given timer parameters
*
* @param entity entity with the timer params
* @return the milliseconds of the next execution time
*/
private long getNextExecutionTime(TimerParams entity) {
Calendar nextCalendar = Calendar.getInstance();
nextCalendar.setTimeInMillis(entity.getLastTimeEffectuated());
nextCalendar.add(Calendar.SECOND, entity.getSeconds());
nextCalendar.add(Calendar.MINUTE, entity.getMinutes());
nextCalendar.add(Calendar.HOUR_OF_DAY, entity.getHours());
nextCalendar.add(Calendar.DAY_OF_MONTH, entity.getDays());
nextCalendar.add(Calendar.YEAR, entity.getYears());
return nextCalendar.getTimeInMillis();
}