ojb.broker.cache
Class PermanentObjectCacheImpl

java.lang.Object
  |
  +--ojb.broker.cache.PermanentObjectCacheImpl

All Implemented Interfaces:

ObjectCache

public class PermanentObjectCacheImpl

extends java.lang.Object

implements ObjectCache

This is an implementation of the ObjectCache interface that caches all objects in memory regardless of memory consumption.
It is not intended to be used as the main ObjectCache but only to be used in conjunction with the MultipleObjectCacheImpl for special object classes. It should only be used for objects which are few in number and not too big in size but expensive to re-create from the DB.

Author:

R Bischof

Field Summary

protected java.util.Map

cachedObjects holds all cached object identities

Constructor Summary

PermanentObjectCacheImpl()

Method Summary

void	cache(Identity oid, java.lang.Object obj) Caches the given object
void	cache(java.lang.Object obj) Caches the given object
void	clear() Clears the cache
java.lang.Object	lookup(Identity oid) Looks up the cache for an object that matches the given identity
void	remove(java.lang.Object obj) Description of the Method

Methods inherited from class java.lang.Object

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

Field Detail

cachedObjects

protected java.util.Map cachedObjects

holds all cached object identities

Constructor Detail

PermanentObjectCacheImpl

public PermanentObjectCacheImpl()

Method Detail

cache

public void cache(java.lang.Object obj)

Caches the given object

Specified by:

cache in interface ObjectCache

Parameters:

obj - The object to cache

clear

public void clear()

Clears the cache

Specified by:

clear in interface ObjectCache

cache

public void cache(Identity oid,
                  java.lang.Object obj)

Caches the given object

Specified by:

cache in interface ObjectCache

Parameters:

oid - The identity of the given object to cache

obj - The object to cache

lookup

public java.lang.Object lookup(Identity oid)

Looks up the cache for an object that matches the given identity

Specified by:

lookup in interface ObjectCache

Parameters:

oid - The identity of the object to look up

Returns:

The object if found, otherwise null

remove

public void remove(java.lang.Object obj)

Description of the Method

Specified by:

remove in interface ObjectCache

Parameters:

obj - Description of Parameter