Timer

```
public interface Timer
```
The Timer interface contains information about a timer that was created through the enterprise bean Timer Service.

Since:

EJB 2.1

Examples (en):

schedule-expression, schedule-events

Examples (pt):

schedule-expression, schedule-events

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`cancel()` Cause the timer and all its associated expiration notifications to be cancelled.
`TimerHandle`	`getHandle()` Get a serializable handle to the timer.
`java.io.Serializable`	`getInfo()` Get the information associated with the timer at the time of creation.
`java.util.Date`	`getNextTimeout()` Get the point in time at which the next timer expiration is scheduled to occur.
`ScheduleExpression`	`getSchedule()` Get the schedule expression corresponding to this timer.
`long`	`getTimeRemaining()` Get the number of milliseconds that will elapse before the next scheduled timer expiration.
`boolean`	`isCalendarTimer()` Return whether this timer is a calendar-based timer.
`boolean`	`isPersistent()` Return whether this timer has persistent semantics.

- Method Detail
  - cancel
```
void cancel()
     throws java.lang.IllegalStateException,
            NoSuchObjectLocalException,
            EJBException
```
    Cause the timer and all its associated expiration notifications to be cancelled.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    EJBException - If this method could not complete due to a system-level failure.
  - getTimeRemaining
```
long getTimeRemaining()
               throws java.lang.IllegalStateException,
                      NoSuchObjectLocalException,
                      NoMoreTimeoutsException,
                      EJBException
```
    Get the number of milliseconds that will elapse before the next scheduled timer expiration.
    
    Returns:
    
    the number of milliseconds that will elapse before the next scheduled timer expiration.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    javax.ejb.NoMoreTimeoutsExceptions - Indicates that the timer has no future timeouts
    
    EJBException - If this method could not complete due to a system-level failure.
    
    NoMoreTimeoutsException
  - getNextTimeout
```
java.util.Date getNextTimeout()
                       throws java.lang.IllegalStateException,
                              NoSuchObjectLocalException,
                              NoMoreTimeoutsException,
                              EJBException
```
    Get the point in time at which the next timer expiration is scheduled to occur.
    
    Returns:
    
    the point in time at which the next timer expiration is scheduled to occur.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    javax.ejb.NoMoreTimeoutsExceptions - Indicates that the timer has no future timeouts
    
    EJBException - If this method could not complete due to a system-level failure.
    
    NoMoreTimeoutsException
  - getSchedule
```
ScheduleExpression getSchedule()
                        throws java.lang.IllegalStateException,
                               NoSuchObjectLocalException,
                               EJBException
```
    Get the schedule expression corresponding to this timer. The timer must be a calendar-based timer. It may have been created automatically or programmatically.
    
    Returns:
    
    schedule expression for the timer.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method. Also thrown if invoked on a timer that is not a calendar-based timer.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    EJBException - If this method could not complete due to a system-level failure.
    
    Since:
    
    EJB 3.1
  - isPersistent
```
boolean isPersistent()
              throws java.lang.IllegalStateException,
                     NoSuchObjectLocalException,
                     EJBException
```
    Return whether this timer has persistent semantics.
    
    Returns:
    
    boolean indicating whether the timer is persistent.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    EJBException - If this method could not complete due to a system-level failure.
    
    Since:
    
    EJB 3.1
  - isCalendarTimer
```
boolean isCalendarTimer()
                 throws java.lang.IllegalStateException,
                        NoSuchObjectLocalException,
                        EJBException
```
    Return whether this timer is a calendar-based timer.
    
    Returns:
    
    boolean indicating whether the timer is calendar-based.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    EJBException - If this method could not complete due to a system-level failure.
    
    Since:
    
    EJB 3.1
  - getInfo
```
java.io.Serializable getInfo()
                      throws java.lang.IllegalStateException,
                             NoSuchObjectLocalException,
                             EJBException
```
    Get the information associated with the timer at the time of creation. This may be the info string that was passed to the timer creation method or the info element of the Schedule annotaiton.
    
    Returns:
    
    The Serializable object that was passed in at timer creation, or null if the info argument passed in at timer creation was null.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    EJBException - If this method could not complete due to a system-level failure.
  - getHandle
```
TimerHandle getHandle()
               throws java.lang.IllegalStateException,
                      NoSuchObjectLocalException,
                      EJBException
```
    Get a serializable handle to the timer. This handle can be used at a later time to re-obtain the timer reference.
    
    Returns:
    
    a serializable handle to the timer.
    
    Throws:
    
    java.lang.IllegalStateException - If this method is invoked while the instance is in a state that does not allow access to this method. Also thrown if invoked on a non-persistent timer.
    
    NoSuchObjectLocalException - If invoked on a timer that has expired or has been cancelled.
    
    EJBException - If this method could not complete due to a system-level failure.

Interface Timer

Method Summary

Method Detail

cancel

getTimeRemaining

getNextTimeout

getSchedule

isPersistent

isCalendarTimer

getInfo

getHandle