com.bankframe.services.cache
Class NullCache

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

All Implemented Interfaces:

Cache, NamedCache, Map

public class NullCache
extends Object
implements Cache, NamedCache

This class implements Cache & NamedCache and is intended for use when a implementation code refers to a named cache, but at runtime caching is not required. The cache therefore has no memory overhead. Note that this cache always uses NullPolicy.INSTANCE. No other policy can be assigned.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

NullCache()
Constructor for NullCache.

Method Summary

void	addCacheListener(Object key, CacheListener listener) Adds a CacheListener for a specified key.
void	cleanup() This method cleans up the cache by removing un-needed entries
void	clear()
boolean	containsKey(Object arg0)
boolean	containsValue(Object arg0)
void	enableCaching(boolean enableCache) This method enables or disables caching.
Set	entrySet()
Object	get(Object arg0)
CachePolicy	getCachePolicy() This method gets the CachePolicy object for this Cache
String	getName() Returns the name.
boolean	isEmpty()
Set	keySet()
Object	put(Object arg0, Object arg1)
void	putAll(Map arg0)
Object	remove(Object arg0)
void	remove(Set keySet) This method removes the specified keys from the cache and the data store
void	removeAll() Removes all objects from the cache and from the data store.
void	removeCacheListener(Object key, CacheListener listener) Removes a CacheListener for a specified key.
void	setCachePolicy(CachePolicy policy) This method sets the CachePolicy object for this Cache
void	setName(String name) Returns the value.
int	size()
Collection	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

NullCache

public NullCache()

Constructor for NullCache.

Method Detail

cleanup

public void cleanup()

Description copied from interface: Cache

This method cleans up the cache by removing un-needed entries

Specified by:

cleanup in interface Cache

See Also:

Cache.cleanup()

enableCaching

public void enableCaching(boolean enableCache)

Description copied from interface: Cache

This method enables or disables caching. When caching is disabled the cache passes all operations on to the persistent map instance

Specified by:

enableCaching in interface Cache

Parameters:

enableCache - true to enable, false to disable

See Also:

Cache.enableCaching(boolean)

getCachePolicy

public CachePolicy getCachePolicy()

Description copied from interface: Cache

This method gets the CachePolicy object for this Cache

Specified by:

getCachePolicy in interface Cache

Returns:

CachePolicy instance or null if there is no CachePolicy

See Also:

Cache.getCachePolicy()

remove

public void remove(Set keySet)

Description copied from interface: Cache

This method removes the specified keys from the cache and the data store

Specified by:

remove in interface Cache

Parameters:

keySet - the keys to remove from the cache

See Also:

Cache.remove(Set)

removeAll

public void removeAll()

Description copied from interface: Cache

Removes all objects from the cache and from the data store. Use this method with caution!

Specified by:

removeAll in interface Cache

See Also:

Cache.removeAll()

setCachePolicy

public void setCachePolicy(CachePolicy policy)

Description copied from interface: Cache

This method sets the CachePolicy object for this Cache

Specified by:

setCachePolicy in interface Cache

Parameters:

policy - The new cache policy

See Also:

Cache.setCachePolicy(CachePolicy)

setName

public void setName(String name)

Description copied from interface: NamedCache

Returns the value.

Specified by:

setName in interface NamedCache

Parameters:

name - String

See Also:

NamedCache.setName(String)

getName

public String getName()

Description copied from interface: NamedCache

Returns the name.

Specified by:

getName in interface NamedCache

Returns:

String

See Also:

NamedCache.getName()

size

public int size()

Specified by:

size in interface Map

See Also:

Map.size()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map

See Also:

Map.isEmpty()

containsKey

public boolean containsKey(Object arg0)

Specified by:

containsKey in interface Map

See Also:

Map.containsKey(Object)

containsValue

public boolean containsValue(Object arg0)

Specified by:

containsValue in interface Map

See Also:

Map.containsValue(Object)

get

public Object get(Object arg0)

Specified by:

get in interface Map

See Also:

Map.get(Object)

put

public Object put(Object arg0,
                  Object arg1)

Specified by:

put in interface Map

See Also:

Map.put(Object, Object)

remove

public Object remove(Object arg0)

Specified by:

remove in interface Map

See Also:

Map.remove(Object)

putAll

public void putAll(Map arg0)

Specified by:

putAll in interface Map

See Also:

Map.putAll(Map)

clear

public void clear()

Specified by:

clear in interface Map

See Also:

Map.clear()

keySet

public Set keySet()

Specified by:

keySet in interface Map

See Also:

Map.keySet()

values

public Collection values()

Specified by:

values in interface Map

See Also:

Map.values()

entrySet

public Set entrySet()

Specified by:

entrySet in interface Map

See Also:

Map.entrySet()

addCacheListener

public void addCacheListener(Object key,
                             CacheListener listener)

Adds a CacheListener for a specified key. Listeners will be notified of actions on the cache for that key only.

Specified by:

addCacheListener in interface Cache

removeCacheListener

public void removeCacheListener(Object key,
                                CacheListener listener)

Removes a CacheListener for a specified key.

Specified by:

removeCacheListener in interface Cache