IObservationContext (CMS API 15.5.0 API)

All Superinterfaces:

org.apache.wicket.util.io.IClusterable, Serializable
```
public interface IObservationContext<T extends IObservable>
extends org.apache.wicket.util.io.IClusterable
```
The context representing the observer registry to the observable. Framework clients should not implement this interface.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`notifyObservers(EventCollection<IEvent<T>> events)`	Notify observers of events that pertain to an observable.
`void`	`registerObserver(IObserver<?> observer)`	Register an observer.
`void`	`unregisterObserver(IObserver<?> observer)`	Unregister an observer.

- Method Detail
  - notifyObservers
```
void notifyObservers(EventCollection<IEvent<T>> events)
```
    Notify observers of events that pertain to an observable. The events are dispatched to registered observers.
    Implementations should minimize the number of calls to this method, as all observers will be notified.
    
    Parameters:
    
    events - The events to be dispatched to observers
  - registerObserver
```
void registerObserver(IObserver<?> observer)
```
    Register an observer. Allows observables to delegate subscriptions to one another. When an observable has been implemented in terms of another observable, it can translate events of the underlying observable into events that are appropriate for its own type.
    
    Parameters:
    
    observer -
  - unregisterObserver
```
void unregisterObserver(IObserver<?> observer)
```
    Unregister an observer.
    
    Parameters:
    
    observer -