WebLogic Server 6.0sp2 API Reference

weblogicx.jsp.tags
Class BubblingCache

java.lang.Object
  |
  +--java.util.AbstractMap
        |
        +--java.util.HashMap
              |
              +--weblogicx.jsp.tags.BubblingCache

public class BubblingCache

extends java.util.HashMap

implements java.io.Externalizable

This cache uses a simple algorithm to keep the most often used entries near the top and to recycle those entries which are not used often.

Author:

Copyright © 2001 BEA Systems, Inc. All Rights Reserved.

See Also:

Serialized Form

Constructor Summary

BubblingCache()

BubblingCache(int size)
Create an LRU cache of a particular maximum size.

Method Summary

java.lang.Object	get(java.lang.Object key) When we get an object from the cache, swap its position with its neighbor, moving it up the list towards the top.
static void	main(java.lang.String[] args)
java.lang.Object	put(java.lang.Object key, java.lang.Object value) When we put an object in the cache either bubble it, if it already in the cache, or drop the bottom of the bubbler and replace it with this object.
void	readExternal(java.io.ObjectInput oi)
java.lang.String	toString()
void	writeExternal(java.io.ObjectOutput oo)

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, entrySet, isEmpty, keySet, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BubblingCache

public BubblingCache(int size)

Create an LRU cache of a particular maximum size.

BubblingCache

public BubblingCache()

Method Detail

get

public java.lang.Object get(java.lang.Object key)

When we get an object from the cache, swap its position with its neighbor, moving it up the list towards the top.

Overrides:

get in class java.util.HashMap

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

When we put an object in the cache either bubble it, if it already in the cache, or drop the bottom of the bubbler and replace it with this object. If the bubbler is not full just add it to the end of the list.

Overrides:

put in class java.util.HashMap

toString

public java.lang.String toString()

Overrides:

toString in class java.util.AbstractMap

writeExternal

public void writeExternal(java.io.ObjectOutput oo)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

readExternal

public void readExternal(java.io.ObjectInput oi)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception