org.apache.ojb.broker.cache
Class CacheDistributor

java.lang.Object
  org.apache.ojb.broker.cache.AbstractMetaCache
      org.apache.ojb.broker.cache.CacheDistributor

All Implemented Interfaces:

ObjectCache

public class CacheDistributor

extends AbstractMetaCache

A intern used AbstractMetaCache implementation acting as distributor of ObjectCache implementations declared in configuration metadata.

Reads the name of the used ObjectCache implementation
a) from class-descriptor, or if not found
b) from jdbc-connection-descriptor, or if not found
use a given standard ObjectCache implementation (given by constructor argument).

Version:

$Id: CacheDistributor.java,v 1.4 2004/01/04 18:27:31 arminw Exp $

Author:

Matthew Baird (mattbaird@yahoo.com), Armin Waibel

Field Summary

Fields inherited from class org.apache.ojb.broker.cache.AbstractMetaCache

METHOD_CACHE, METHOD_LOOKUP, METHOD_REMOVE

Constructor Summary

CacheDistributor(PersistenceBroker broker, ObjectCache defaultCache)
public Default Constructor

Method Summary

void	clear() clear the ObjectCache.
ObjectCache	getCache(Identity oid, java.lang.Object obj, int callingMethod) This method handle all calls against the ObjectCache interface.
protected ObjectCacheDescriptor	searchInClassDescriptor(Identity oid) Try to lookup ObjectCacheDescriptor in ClassDescriptor.
protected ObjectCacheDescriptor	searchInJdbcConnectionDescriptor() Lookup ObjectCacheDescriptor in JdbcConnectionDescriptor.
java.lang.String	toString()

Methods inherited from class org.apache.ojb.broker.cache.AbstractMetaCache

cache, lookup, remove

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheDistributor

public CacheDistributor(PersistenceBroker broker,
                        ObjectCache defaultCache)

public Default Constructor

Method Detail

clear

public void clear()

Description copied from interface: ObjectCache

clear the ObjectCache.

getCache

public ObjectCache getCache(Identity oid,
                            java.lang.Object obj,
                            int callingMethod)

Description copied from class: AbstractMetaCache

This method handle all calls against the ObjectCache interface. Note: The parameter obj can be null - e.g. when lookup or remove method was called.

Specified by:

getCache in class AbstractMetaCache

Parameters:

oid - Identity of the target object.

obj - The target object itself or null if not available.

callingMethod - Specifies the type of method call against the ObjectCache interface. AbstractMetaCache.METHOD_CACHE, AbstractMetaCache.METHOD_LOOKUP, AbstractMetaCache.METHOD_REMOVE.

Returns:

The ObjectCache implementation.

searchInClassDescriptor

protected ObjectCacheDescriptor searchInClassDescriptor(Identity oid)

Try to lookup ObjectCacheDescriptor in ClassDescriptor.

Parameters:

oid -

Returns:

Returns the found ObjectCacheDescriptor or null if none was found.

searchInJdbcConnectionDescriptor

protected ObjectCacheDescriptor searchInJdbcConnectionDescriptor()

Lookup ObjectCacheDescriptor in JdbcConnectionDescriptor.

Returns:

Returns the found ObjectCacheDescriptor or null if none was found.

toString

public java.lang.String toString()