Package org.apache.tapestry5.internal.util

Class RecomputableSupport

java.lang.Object

org.apache.tapestry5.internal.util.RecomputableSupport

public class RecomputableSupport
extends java.lang.Object

A utility class for managing a cacheable result that can be recomputed when needed.

Constructor Summary

Constructors

Constructor	Description
RecomputableSupport()

Method Summary

Modifier and Type	Method	Description
<T> Invokable<T>	create(Invokable<T> invokable)	Wraps a computation with caching logic; once computed, the Invokable will return the same value, until invalidate() is invoked.
void	initialize(InvalidationEventHub hub)	Forces invalidate() to be invoked when the hub emits an invalidation callback.
void	invalidate()	Invalidates any existing create(org.apache.tapestry5.ioc.Invokable) wrappers} such that they will re-perform the computation when next invoked.

Methods inherited from class java.lang.Object

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

Constructor Detail

RecomputableSupport

public RecomputableSupport()

Method Detail

invalidate

public void invalidate()

Invalidates any existing create(org.apache.tapestry5.ioc.Invokable) wrappers} such that they will re-perform the computation when next invoked.

initialize

public void initialize(InvalidationEventHub hub)

Forces invalidate() to be invoked when the hub emits an invalidation callback.

Parameters:

hub -

create

public <T> Invokable<T> create(Invokable<T> invokable)

Wraps a computation with caching logic; once computed, the Invokable will return the same value, until invalidate() is invoked.

Type Parameters:

T - type of result

Parameters:

invokable - a computation to perform, whose results are cacheable until invalidated

Returns:

caching-enabled wrapper around invokable