org.entityfs.event
Interface EntityObserver

public interface EntityObserver

This interface is implemented by a class that listens to an entity or a file system (an Observable) for updates. All objects that implement the EntityFS interface Observable can be observed. Which events an observable object sends differ from observable object to observable object.

Since:

1.0

Author:

Karl Gustafsson

See Also:

Observable, EntityEvent

Method Summary

void	update(EntityEvent<?> event) This callback method is called by the observed Observable when it sends an event.

Method Detail

update

void update(EntityEvent<?> event)

This callback method is called by the observed Observable when it sends an event. The method is called in the thread that generated the event, which has the following implications:

• The calling thread holds a write lock on the affected entity if the entity sending the event existed before the operation generating the event.
• This method should return quickly. Put longer-running operations on an Executor to be executed in its own thread.

Parameters:

event - The event. It contains a reference to the affected entity.