org.jboss.cache.interceptors
Class ActivationInterceptor

java.lang.Object
  org.jboss.cache.interceptors.Interceptor
      org.jboss.cache.interceptors.BaseCacheLoaderInterceptor
          org.jboss.cache.interceptors.CacheLoaderInterceptor
              org.jboss.cache.interceptors.ActivationInterceptor

All Implemented Interfaces:

ActivationInterceptorMBean, CacheLoaderInterceptorMBean, InterceptorMBean

public class ActivationInterceptor
extends CacheLoaderInterceptor
implements ActivationInterceptorMBean

Loads nodes that don't exist at the time of the call into memory from the CacheLoader. If the nodes were evicted earlier then we remove them from the cache loader after their attributes have been initialized and their children have been loaded in memory.

Version:

$Id: ActivationInterceptor.java,v 1.22 2006/02/18 20:45:54 jerrygauth Exp $

Author:

{Hany Mesha}

Field Summary

protected static java.lang.Object	NULL
protected EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap	transactions List that we have registered for
protected javax.transaction.TransactionManager	tx_mgr
protected TransactionTable	tx_table

Fields inherited from class org.jboss.cache.interceptors.BaseCacheLoaderInterceptor

loader

Constructor Summary

ActivationInterceptor()

Method Summary

java.util.Map	dumpStatistics() Returns a map of the cache interceptor's statistics Map elements consist of {String name, Object value} entries
long	getActivations() Returns the number of cache node activations
protected CacheLoader	getLoader()
protected boolean	hasModifications(java.lang.Object[] args)
java.lang.Object	invoke(org.jgroups.blocks.MethodCall m) Makes sure a node is loaded into memory before a call executes.
void	resetStatistics() Resets an interceptor's cache statistics

Methods inherited from class org.jboss.cache.interceptors.CacheLoaderInterceptor

getCacheLoaderLoads, getCacheLoaderMisses, getNode, loadNode, lock, setCache

Methods inherited from class org.jboss.cache.interceptors.BaseCacheLoaderInterceptor

obtainLoaderLock, obtainLoaderLocks, releaseLoaderLock, releaseLoaderLocks

Methods inherited from class org.jboss.cache.interceptors.Interceptor

getInvocationContext, getNext, getStatisticsEnabled, isActive, isOnePhaseCommitPrepareMehod, isPreparing, isTransactionLifecycleMethod, isValid, setInvocationContext, setNext, setStatisticsEnabled

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.interceptors.CacheLoaderInterceptorMBean

getCacheLoaderLoads, getCacheLoaderMisses

Methods inherited from interface org.jboss.cache.interceptors.InterceptorMBean

getStatisticsEnabled, setStatisticsEnabled

Field Detail

tx_mgr

protected javax.transaction.TransactionManager tx_mgr

tx_table

protected TransactionTable tx_table

transactions

protected EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap transactions

List that we have registered for

NULL

protected static final java.lang.Object NULL

Constructor Detail

ActivationInterceptor

public ActivationInterceptor()

Method Detail

invoke

public java.lang.Object invoke(org.jgroups.blocks.MethodCall m)
                        throws java.lang.Throwable

Makes sure a node is loaded into memory before a call executes. If node is already loaded and its attributes already initialized, then remove it from the cache loader and notify the cache listeners that the node has been activated.

Overrides:

invoke in class CacheLoaderInterceptor

Parameters:

m -

Returns:

Throws:

java.lang.Throwable

getActivations

public long getActivations()

Description copied from interface: ActivationInterceptorMBean

Returns the number of cache node activations

Specified by:

getActivations in interface ActivationInterceptorMBean

Returns:

the number of cache node activations

resetStatistics

public void resetStatistics()

Description copied from interface: InterceptorMBean

Resets an interceptor's cache statistics

Specified by:

resetStatistics in interface InterceptorMBean

Overrides:

resetStatistics in class CacheLoaderInterceptor

dumpStatistics

public java.util.Map dumpStatistics()

Description copied from interface: InterceptorMBean

Returns a map of the cache interceptor's statistics Map elements consist of {String name, Object value} entries

Specified by:

dumpStatistics in interface InterceptorMBean

Overrides:

dumpStatistics in class CacheLoaderInterceptor

Returns:

a map containing statistics

hasModifications

protected boolean hasModifications(java.lang.Object[] args)

getLoader

protected CacheLoader getLoader()