org.jboss.cache.loader
Class JDBCExtendedCacheLoader

java.lang.Object
  org.jboss.cache.loader.JDBCCacheLoader
      org.jboss.cache.loader.JDBCExtendedCacheLoader

All Implemented Interfaces:

CacheLoader, ExtendedCacheLoader, org.jboss.system.Service

public class JDBCExtendedCacheLoader
extends JDBCCacheLoader
implements ExtendedCacheLoader

A A JDBCCacheLoader that implements ExtendedCacheLoader.

Version:

$Id$

Author:

Brian Stansberry

Field Summary

Fields inherited from class org.jboss.cache.loader.JDBCCacheLoader

lock

Constructor Summary

JDBCExtendedCacheLoader()
Create a new JDBCExtendedCacheLoader.

Method Summary

byte[]	loadEntireState() Overrides the superclass method by taking advantage of any special classloader registered for the root node.
byte[]	loadState(Fqn subtree) Fetch a portion of the state for this cache from secondary storage (disk, DB) and return it as a byte buffer.
void	setRegionManager(RegionManager manager) Sets the RegionManager this object should use to manage marshalling/unmarshalling of different regions using different classloaders.
void	storeEntireState(byte[] state) Overrides the superclass method by taking advantage of any special classloader registered for the root node.
void	storeState(byte[] state, Fqn subtree) Store the given portion of the cache tree's state in secondary storage.

Methods inherited from class org.jboss.cache.loader.JDBCCacheLoader

commit, create, destroy, exists, get, getChildrenNames, loadState, prepare, put, put, put, remove, remove, removeData, rollback, setCache, setConfig, start, stop

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.cache.loader.CacheLoader

commit, exists, get, getChildrenNames, prepare, put, put, put, remove, remove, removeData, rollback, setCache, setConfig

Methods inherited from interface org.jboss.system.Service

create, destroy, start, stop

Constructor Detail

JDBCExtendedCacheLoader

public JDBCExtendedCacheLoader()

Create a new JDBCExtendedCacheLoader.

Method Detail

loadState

public byte[] loadState(Fqn subtree)
                 throws java.lang.Exception

Description copied from interface: ExtendedCacheLoader

Fetch a portion of the state for this cache from secondary storage (disk, DB) and return it as a byte buffer. This is for activation of a portion of new cache from a remote cache. The new cache would then call ExtendedCacheLoader.storeState(byte[], Fqn).

Specified by:

loadState in interface ExtendedCacheLoader

Parameters:

subtree - Fqn naming the root (i.e. highest level parent) node of the subtree for which state is requested.

Throws:

java.lang.Exception

See Also:

TreeCache.activateRegion(String)

storeState

public void storeState(byte[] state,
                       Fqn subtree)
                throws java.lang.Exception

Description copied from interface: ExtendedCacheLoader

Store the given portion of the cache tree's state in secondary storage. Overwrite whatever is currently in secondary storage. If the transferred state has Fqns equal to or children of parameter subtree, then no special behavior is required. Otherwise, ensure that the state is integrated under the given subtree. Typically in the latter case subtree would be the Fqn of the buddy backup region for a buddy group; e.g.

If the the transferred state had Fqns starting with "/a" and subtree was "/_BUDDY_BACKUP_/192.168.1.2:5555" then the state should be stored in the local persistent store under "/_BUDDY_BACKUP_/192.168.1.2:5555/a"

Specified by:

storeState in interface ExtendedCacheLoader

Parameters:

state - the state to store

subtree - Fqn naming the root (i.e. highest level parent) node of the subtree included in state. If the Fqns of the data included in state are not already children of subtree, then their Fqns should be altered to make them children of subtree before they are persisted.

Throws:

java.lang.Exception

setRegionManager

public void setRegionManager(RegionManager manager)

Description copied from interface: ExtendedCacheLoader

Sets the RegionManager this object should use to manage marshalling/unmarshalling of different regions using different classloaders.

NOTE: This method is only intended to be used by the TreeCache instance this cache loader is associated with.

Specified by:

setRegionManager in interface ExtendedCacheLoader

Parameters:

manager - the region manager to use, or null.

loadEntireState

public byte[] loadEntireState()
                       throws java.lang.Exception

Overrides the superclass method by taking advantage of any special classloader registered for the root node.

Specified by:

loadEntireState in interface CacheLoader

Overrides:

loadEntireState in class JDBCCacheLoader

Throws:

java.lang.Exception

storeEntireState

public void storeEntireState(byte[] state)
                      throws java.lang.Exception

Overrides the superclass method by taking advantage of any special classloader registered for the root node.

Specified by:

storeEntireState in interface CacheLoader

Overrides:

storeEntireState in class JDBCCacheLoader

Throws:

java.lang.Exception