javax.realtime

Class TimeDispatcher

java.lang.Object

javax.realtime.ActiveEventDispatcher<TimeDispatcher,Timable>

javax.realtime.TimeDispatcher

public final class TimeDispatcher
extends ActiveEventDispatcher<TimeDispatcher,Timable>

A dispatcher for time events: Timer and RealtimeThread.sleep(javax.realtime.Clock, javax.realtime.HighResolutionTime<?>).

Since:

RTSJ 2.0

Constructor Summary

Constructors

Constructor and Description
TimeDispatcher(SchedulingParameters schedule) Creates a new dispatcher, whose dispatching thread runs with the given scheduling parameters.
TimeDispatcher(SchedulingParameters schedule, RealtimeThreadGroup group) Creates a new dispatcher, whose dispatching thread runs with the given scheduling parameters.

Method Summary

Modifier and Type	Method and Description
protected void	activate(Timable target) Activate an active event registered with this dispatcher.
protected void	deactivate(Timable target) Deactivate an active event registered with this dispatcher.
protected void	deregister(Timable target) Deregisters an active event from this dispatcher, breaking its association with this dispatcher.
void	destroy() Makes the dispatcher unusable.
boolean	isRegistered(Timable target) Test wether or not a given event is registered with this dispatcher.
protected void	register(Timable target) Registers an active event with this dispatcher.
static void	setDefaultDispatcher(TimeDispatcher dispatcher) Sets the system default time dispatcher.

Methods inherited from class javax.realtime.ActiveEventDispatcher

getRealtimeThreadGroup, getScheduler, getSchedulingParameters, getThread, setScheduler, setScheduler, setSchedulingParameters

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimeDispatcher

public TimeDispatcher(SchedulingParameters schedule,
                      RealtimeThreadGroup group)
               throws StaticIllegalStateException

Creates a new dispatcher, whose dispatching thread runs with the given scheduling parameters.

Throws:

StaticIllegalStateException - when the intersection of affinity in schedule and the affinity of group does not correspond to a valid affinity.

UnsupportedOperationException - every time, since this is not implemented yet.

Parameters:

schedule - It gives the parameters for scheduling this dispatcher

TimeDispatcher

public TimeDispatcher(SchedulingParameters schedule)
               throws StaticIllegalStateException

Creates a new dispatcher, whose dispatching thread runs with the given scheduling parameters.

Throws:

StaticIllegalStateException - when the intersection of affinity in schedule and the affinity of the current rhread groupo does not correspond to a valid affinity.

UnsupportedOperationException - every time, since this is not implemented yet.

Parameters:

schedule - It gives the parameters for scheduling this dispatcher

Method Detail

setDefaultDispatcher

public static void setDefaultDispatcher(TimeDispatcher dispatcher)

Sets the system default time dispatcher.

Throws:

UnsupportedOperationException - every time, since this is not implemented yet.

Parameters:

dispatcher - To be used when no dispatcher is provided. When null, the default time dispatcher is set to the original system default.

isRegistered

public boolean isRegistered(Timable target)

Test wether or not a given event is registered with this dispatcher.

Specified by:

isRegistered in class ActiveEventDispatcher<TimeDispatcher,Timable>

Parameters:

target - The event to test

Returns:

true when event is registered with this dispatcher.

register

protected void register(Timable target)
                 throws RegistrationException,
                        StaticIllegalStateException

Registers an active event with this dispatcher. Registering an event prevents the event from being programmatically destroyed, but it may not hold the dispatcher from being collected when the dispatcher is in a more deeply nested scope.

Specified by:

register in class ActiveEventDispatcher<TimeDispatcher,Timable>

Throws:

RegistrationException - when event is already registered.

StaticIllegalStateException - when this object has been destroyed.

Parameters:

target - The event to register

activate

protected void activate(Timable target)
                 throws StaticIllegalStateException

Activate an active event registered with this dispatcher.

Overrides:

activate in class ActiveEventDispatcher<TimeDispatcher,Timable>

Throws:

StaticIllegalStateException - when event is stopped.

Parameters:

target - The event to register

deregister

protected void deregister(Timable target)
                   throws DeregistrationException,
                          StaticIllegalStateException

Deregisters an active event from this dispatcher, breaking its association with this dispatcher. This should only happen when an event is assoicated with another dispather.

Specified by:

deregister in class ActiveEventDispatcher<TimeDispatcher,Timable>

Throws:

StaticIllegalStateException - when this object has been destroyed

DeregistrationException

Parameters:

target - The event to deregister

deactivate

protected void deactivate(Timable target)
                   throws StaticIllegalStateException

Deactivate an active event registered with this dispatcher.

Overrides:

deactivate in class ActiveEventDispatcher<TimeDispatcher,Timable>

Throws:

StaticIllegalStateException - when this object has been destroyed.

Parameters:

target - The event to deregister

destroy

public void destroy()
             throws StaticIllegalStateException

Makes the dispatcher unusable.

Specified by:

destroy in class ActiveEventDispatcher<TimeDispatcher,Timable>

Throws:

StaticIllegalStateException - when called on a dispatcher that has one or more registered objects.