org.eclipse.scada.core.subscription

Class Subscription<T>

java.lang.Object

org.eclipse.scada.core.subscription.Subscription<T>

public class Subscription<T>
extends Object

Constructor Summary

Constructors

Constructor and Description
Subscription(T topic)

Method Summary

Modifier and Type	Method and Description
boolean	isEmpty() Check if the subscription is empty or nor.
boolean	isGranted() Check if the subscription is in granted state.
boolean	isSubscribed() Check if somebody is subscribed to us
void	setSource(SubscriptionSource<T> source)
void	subscribe(SubscriptionListener<T> listener, Object hint)
void	unsubscribe(SubscriptionListener<T> listener)

Methods inherited from class java.lang.Object

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

Constructor Detail

Subscription

public Subscription(T topic)

Method Detail

isEmpty

public boolean isEmpty()

Check if the subscription is empty or nor. A subscription is empty if it neither has a subscription source set nor listeners attached to it.

Returns:

true if the subscription is empty, false otherwise

isGranted

public boolean isGranted()

Check if the subscription is in granted state. This means that no source is connected but there are listeners attached.

Returns:

true if the subscription is in granted state, false otherwise

isSubscribed

public boolean isSubscribed()

Check if somebody is subscribed to us

Returns:

true if we have listeners, false otherwise

subscribe

public void subscribe(SubscriptionListener<T> listener,
                      Object hint)

unsubscribe

public void unsubscribe(SubscriptionListener<T> listener)

setSource

public void setSource(SubscriptionSource<T> source)