org.hibernate.cache.jbc.timestamp

Class ClusteredConcurrentTimestampsRegionImpl

java.lang.Object

org.hibernate.cache.jbc.BasicRegionAdapter

org.hibernate.cache.jbc.TransactionalDataRegionAdapter

org.hibernate.cache.jbc.timestamp.ClusteredConcurrentTimestampsRegionImpl

All Implemented Interfaces:

GeneralDataRegion, Region, TimestampsRegion, TransactionalDataRegion

public class ClusteredConcurrentTimestampsRegionImpl
extends TransactionalDataRegionAdapter
implements TimestampsRegion

Prototype of a clustered timestamps cache region impl usable if the TimestampsRegion API is changed.

Maintains a local (authoritative) cache of timestamps along with the distributed cache held in JBoss Cache. Listens for changes in the distributed cache and updates the local cache accordingly. Ensures that any changes in the local cache represent either 1) an increase in the timestamp or 2) a stepback in the timestamp by the caller that initially increased it as part of a pre-invalidate call. This approach allows timestamp changes to be replicated asynchronously by JBoss Cache while still preventing invalid backward changes in timestamps.

NOTE: This is just a prototype!!! Only useful if we change the TimestampsRegion API.

Version:

$Revision: 14106 $

Author:

Brian Stansberry

Field Summary

Fields

Modifier and Type	Field and Description
static String	TYPE

Fields inherited from class org.hibernate.cache.jbc.TransactionalDataRegionAdapter

metadata

Fields inherited from class org.hibernate.cache.jbc.BasicRegionAdapter

currentView, internalFqn, invalidateState, invalidationMutex, ITEM, jbcCache, log, memberId, optimistic, regionFqn, regionName, regionRoot, regionRootMutex, replication, transactionManager

Constructor Summary

Constructors

Constructor and Description
ClusteredConcurrentTimestampsRegionImpl(org.jboss.cache.Cache jbcCache, String regionName, String regionPrefix, Properties properties) Create a new ClusteredConccurentTimestampsRegionImpl.

Method Summary

Methods

Modifier and Type	Method and Description
protected org.jboss.cache.Fqn<String>	createRegionFqn(String regionName, String regionPrefix)
void	destroy() The "end state" contract of the region's lifecycle.
void	evict(Object key) Evict an item from the cache immediately (without regard for transaction isolation).
void	evictAll() Evict all contents of this particular cache region (without regard for transaction isolation).
Object	get(Object key) Get an item from the cache.
void	invalidate(Object key, Object value, Object preInvalidateValue)
void	nodeModified(org.jboss.cache.notifications.event.NodeModifiedEvent event) Monitors cache events and updates the local cache
void	nodeRemoved(org.jboss.cache.notifications.event.NodeRemovedEvent event) Monitors cache events and updates the local cache
void	preInvalidate(Object key, Object value)
void	put(Object key, Object value) Put an item into the cache.

Methods inherited from class org.hibernate.cache.jbc.TransactionalDataRegionAdapter

getCacheDataDescription, isTransactionAware

Methods inherited from class org.hibernate.cache.jbc.BasicRegionAdapter

activateLocalClusterNode, checkValid, contains, deactivateLocalNode, ensureRegionRootExists, escapeRegionName, getCacheInstance, getElementCountInMemory, getElementCountOnDisk, getMemberId, getName, getNonLockingDataVersionOption, getRegionFqn, getSizeInMemory, getTimeout, getTypeFirstRegionFqn, getTypeLastRegionFqn, handleEvictAllInvalidation, handleEvictAllModification, nextTimestamp, nodeInvalidated, resume, suspend, suspendAndGet, toMap, viewChanged

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.cache.Region

contains, getElementCountInMemory, getElementCountOnDisk, getName, getSizeInMemory, getTimeout, nextTimestamp, toMap

Field Detail

TYPE

public static final String TYPE

See Also:

Constant Field Values

Constructor Detail

ClusteredConcurrentTimestampsRegionImpl

public ClusteredConcurrentTimestampsRegionImpl(org.jboss.cache.Cache jbcCache,
                                       String regionName,
                                       String regionPrefix,
                                       Properties properties)

Create a new ClusteredConccurentTimestampsRegionImpl.

Parameters:

jbcCache -

regionName -

regionPrefix - TODO

metadata -

Method Detail

createRegionFqn

protected org.jboss.cache.Fqn<String> createRegionFqn(String regionName,
                                          String regionPrefix)

Specified by:

createRegionFqn in class BasicRegionAdapter

evict

public void evict(Object key)
           throws CacheException

Description copied from interface: GeneralDataRegion

Evict an item from the cache immediately (without regard for transaction isolation).

Specified by:

evict in interface GeneralDataRegion

Parameters:

key - The key of the item to remove

Throws:

CacheException - Indicates a problem accessing the item or region.

evictAll

public void evictAll()
              throws CacheException

Description copied from interface: GeneralDataRegion

Evict all contents of this particular cache region (without regard for transaction isolation).

Specified by:

evictAll in interface GeneralDataRegion

Throws:

CacheException - Indicates problem accessing the region.

get

public Object get(Object key)
           throws CacheException

Description copied from interface: GeneralDataRegion

Get an item from the cache.

Specified by:

get in interface GeneralDataRegion

Parameters:

key - The key of the item to be retrieved.

Returns:

the cached object or null

Throws:

CacheException - Indicates a problem accessing the item or region.

put

public void put(Object key,
       Object value)
         throws CacheException

Description copied from interface: GeneralDataRegion

Put an item into the cache.

Specified by:

put in interface GeneralDataRegion

Parameters:

key - The key under which to cache the item.

value - The item to cache.

Throws:

CacheException - Indicates a problem accessing the region.

preInvalidate

public void preInvalidate(Object key,
                 Object value)
                   throws CacheException

Throws:

CacheException

invalidate

public void invalidate(Object key,
              Object value,
              Object preInvalidateValue)
                throws CacheException

Throws:

CacheException

destroy

public void destroy()
             throws CacheException

Description copied from interface: Region

The "end state" contract of the region's lifecycle. Called during SessionFactory.close() to give the region a chance to cleanup.

Specified by:

destroy in interface Region

Overrides:

destroy in class BasicRegionAdapter

Throws:

CacheException - Indicates problem shutting down

nodeModified

public void nodeModified(org.jboss.cache.notifications.event.NodeModifiedEvent event)

Monitors cache events and updates the local cache

Overrides:

nodeModified in class BasicRegionAdapter

Parameters:

event -

nodeRemoved

public void nodeRemoved(org.jboss.cache.notifications.event.NodeRemovedEvent event)

Monitors cache events and updates the local cache

Parameters:

event -