cern.gp.nodes.cache

Interface CachingStrategy

All Known Implementing Classes:

NoCachingStrategy, StickyCachingStrategy, TimeLimitedCachingStrategy

public interface CachingStrategy

An object implementing this interface defines a strategy of caching. This object does not keep track of the cached objects but rather provide the strategy associated to the caching of those objects.

Author:

Lionel Mestre

Method Summary

Modifier and Type	Method and Description
void	invalidateCache() Invalidates the current cached value.
boolean	isCacheValid() Checks whether the cache is still valid.
void	validateCache() Validates the current cached value.

Method Detail

isCacheValid

boolean isCacheValid()

Checks whether the cache is still valid. If true is returned the cached value will be used. If false is returned the cached value will be discarded and the getter will be invoked to get a new value.

Returns:

true if the cache is still valid

validateCache

void validateCache()

Validates the current cached value. This method is called to signal that the cached value has just been updated. The strategy should take this event into account for the implementation of isCached()

invalidateCache

void invalidateCache()

Invalidates the current cached value. This method is called to signal that the cached value should not be used anymore.