Package org.apache.activemq.memory

Class UsageManagerCacheFilter

java.lang.Object

org.apache.activemq.memory.CacheFilter

org.apache.activemq.memory.UsageManagerCacheFilter

All Implemented Interfaces:

Cache

public class UsageManagerCacheFilter
extends CacheFilter

Simple CacheFilter that increases/decreases usage on a UsageManager as objects are added/removed from the Cache.

Field Summary

Fields inherited from class org.apache.activemq.memory.CacheFilter

next

Constructor Summary

Constructors

Constructor	Description
UsageManagerCacheFilter(Cache next, MemoryUsage um)

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
protected long	getUsageOfAddedObject(Object value)
protected long	getUsageOfRemovedObject(Object value)
Object	put(Object key, Object value)	Puts an object into the cache.
Object	remove(Object key)	Removes an object from the cache.

Methods inherited from class org.apache.activemq.memory.CacheFilter

get, size

Methods inherited from class java.lang.Object

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

Constructor Detail

UsageManagerCacheFilter

public UsageManagerCacheFilter(Cache next,
                               MemoryUsage um)

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

Overrides:

put in class CacheFilter

remove

public Object remove(Object key)

Description copied from interface: Cache

Removes an object from the cache.

Specified by:

remove in interface Cache

Overrides:

remove in class CacheFilter

Returns:

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

getUsageOfAddedObject

protected long getUsageOfAddedObject(Object value)

getUsageOfRemovedObject

protected long getUsageOfRemovedObject(Object value)

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

Overrides:

close in class CacheFilter