Package org.apache.activemq.memory

Class MapCache

java.lang.Object

org.apache.activemq.memory.MapCache

All Implemented Interfaces:

Cache

public class MapCache
extends Object
implements Cache

Use any Map to implement the Cache. No cache eviction going on here. Just gives a Map a Cache interface.

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<Object,Object>	map

Constructor Summary

Constructors

Constructor	Description
MapCache()
MapCache(Map<Object,Object> map)

Method Summary

Modifier and Type	Method	Description
void	close()	Lets a cache know it will not be used any further and that it can release acquired resources
Object	get(Object key)	Gets an object that was previously put into this object.
Object	put(Object key, Object value)	Puts an object into the cache.
Object	remove(Object key)	Removes an object from the cache.
int	size()	How big is the cache right now?

Methods inherited from class java.lang.Object

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

Field Detail

map

protected final Map<Object,Object> map

Constructor Detail

MapCache

public MapCache()

MapCache

public MapCache(Map<Object,Object> map)

Method Detail

put

public Object put(Object key,
                  Object value)

Description copied from interface: Cache

Puts an object into the cache.

Specified by:

put in interface Cache

get

public Object get(Object key)

Description copied from interface: Cache

Gets an object that was previously put into this object.

Specified by:

get in interface Cache

Returns:

null if the object was not previously put or if the object has expired out of the cache.

remove

public Object remove(Object key)

Description copied from interface: Cache

Removes an object from the cache.

Specified by:

remove in interface Cache

Returns:

the object associated with the key if it was still in the cache.

close

public void close()

Description copied from interface: Cache

Lets a cache know it will not be used any further and that it can release acquired resources

Specified by:

close in interface Cache

size

public int size()

Description copied from interface: Cache

How big is the cache right now?

Specified by:

size in interface Cache

Returns:

the size.