com.bankframe.services.cache
Class NullPolicy

java.lang.Object
  com.bankframe.services.cache.NullPolicy

All Implemented Interfaces:

CachePolicy

public class NullPolicy

extends java.lang.Object

implements CachePolicy

The NullPolicy type. This policy object has no policy!. It always determines an entry to be valid and never provides any entries to be removed. Using this policy object with a Cache should be equivalent to using a standard Hashtable or HashMap object. Since this policy maintains no state and can never change, a single instance of this policy can be shared between all clients that need to use it. This instance is called NullPolicy.INSTANCE

Field Summary

static NullPolicy

INSTANCE This is the single instance of this policy object

Method Summary

java.util.Set	cleanup() This method returns a set containing the keys of values that have expired.
boolean	isCacheEntryValid(java.lang.Object key, java.lang.Object value) This method determines if the specified entry should be removed from the cache
void	remove(java.lang.Object key) This method signals the entry has been removed from the cache
void	remove(java.util.Set keySet) This method signals the set of entries has been removed from the cache
void	removeAll() This method signals that all entries have been removed from the cache
void	updateCacheEntries(java.util.Map values) This method updates all the specified values
void	updateCacheEntry(java.lang.Object key, java.lang.Object value) This method updates the last access time for the specified entry

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final NullPolicy INSTANCE

This is the single instance of this policy object

Method Detail

cleanup

public java.util.Set cleanup()

Description copied from interface: CachePolicy

This method returns a set containing the keys of values that have expired. If this method returns an empty set then there are no values to be removed. If this method returns a null value, then all values have expired

Specified by:

cleanup in interface CachePolicy

isCacheEntryValid

public boolean isCacheEntryValid(java.lang.Object key,
                                 java.lang.Object value)

Description copied from interface: CachePolicy

This method determines if the specified entry should be removed from the cache

Specified by:

isCacheEntryValid in interface CachePolicy

remove

public void remove(java.lang.Object key)

Description copied from interface: CachePolicy

This method signals the entry has been removed from the cache

Specified by:

remove in interface CachePolicy

remove

public void remove(java.util.Set keySet)

Description copied from interface: CachePolicy

This method signals the set of entries has been removed from the cache

Specified by:

remove in interface CachePolicy

removeAll

public void removeAll()

Description copied from interface: CachePolicy

This method signals that all entries have been removed from the cache

Specified by:

removeAll in interface CachePolicy

updateCacheEntries

public void updateCacheEntries(java.util.Map values)

Description copied from interface: CachePolicy

This method updates all the specified values

Specified by:

updateCacheEntries in interface CachePolicy

updateCacheEntry

public void updateCacheEntry(java.lang.Object key,
                             java.lang.Object value)

Description copied from interface: CachePolicy

This method updates the last access time for the specified entry

Specified by:

updateCacheEntry in interface CachePolicy