Package arez

Class Observer

java.lang.Object

arez.Node

arez.Observer

All Implemented Interfaces:

Disposable

public final class Observer
extends Node

A node within Arez that is notified of changes in 0 or more Observables.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	Observer.Flags

Method Summary

Modifier and Type	Method	Description
void	dispose()	Make the Observer INACTIVE and release any resources associated with observer.
boolean	isDisposed()	Return true if dispose() has been called on object.
void	reportStale()	This method should be invoked if the observer has non-arez dependencies and one of these dependencies has been updated.
void	schedule()	Schedule this observer if it does not already have a reaction pending.

Methods inherited from class arez.Node

getContext, getName, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface arez.Disposable

isNotDisposed

Method Details

dispose

public void dispose()

Make the Observer INACTIVE and release any resources associated with observer. The applications should NOT interact with the Observer after it has been disposed.

isDisposed

public boolean isDisposed()

Description copied from interface: Disposable

Return true if dispose() has been called on object.

Returns:

true if dispose has been called.

reportStale

public void reportStale()

This method should be invoked if the observer has non-arez dependencies and one of these dependencies has been updated. This will mark the observer as stale and reschedule the reaction if necessary. The method must be invoked from within a read-write transaction. the reaction if necessary. The method must be invoked from within a read-write transaction.

schedule

public void schedule()

Schedule this observer if it does not already have a reaction pending. The observer will not actually react if it is not already marked as STALE.