EntityInstanceCache (JBoss Server API) - JBoss 4.0.1 sp1 server API Documentation 英文版文档

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

org.jboss.ejb.plugins
Class EntityInstanceCache

java.lang.Object
  org.jboss.ejb.plugins.AbstractInstanceCache
      org.jboss.ejb.plugins.EntityInstanceCache

All Implemented Interfaces:: AbstractInstanceCacheMBean, AllowedOperationsFlags, ContainerPlugin, EntityCache, EntityInstanceCacheMBean, InstanceCache, MetricsConstants, Monitorable, org.jboss.system.Service, XmlLoadable

Direct Known Subclasses:: InvalidableEntityInstanceCache

public class EntityInstanceCache
extends AbstractInstanceCache
implements EntityCache, EntityInstanceCacheMBean

Cache subclass for entity beans.

Version:: $Revision: 1.23 $
Author:: Simone Bordet, Bill Burke

Field Summary

Fields inherited from class org.jboss.ejb.plugins.AbstractInstanceCache

log

Fields inherited from interface org.jboss.ejb.AllowedOperationsFlags

IN_AFTER_BEGIN, IN_AFTER_COMPLETION, IN_BEFORE_COMPLETION, IN_BUSINESS_METHOD, IN_EJB_ACTIVATE, IN_EJB_CREATE, IN_EJB_FIND, IN_EJB_HOME, IN_EJB_LOAD, IN_EJB_PASSIVATE, IN_EJB_POST_CREATE, IN_EJB_REMOVE, IN_EJB_STORE, IN_EJB_TIMEOUT, IN_INTERCEPTOR_METHOD, IN_SERVICE_ENDPOINT_METHOD, IN_SET_ENTITY_CONTEXT, IN_SET_MESSAGE_DRIVEN_CONTEXT, IN_SET_SESSION_CONTEXT, IN_UNSET_ENTITY_CONTEXT, NOT_ALLOWED

Fields inherited from interface org.jboss.monitor.MetricsConstants

ACTIVITY, APPLICATION, BEAN, BEANCACHE_METRICS, CHECKPOINT, INVOCATION_METRICS, MEMORY_MONITOR, METHOD, PRIMARY_KEY, SYSTEM_METRICS, THREAD_MONITOR, TIME, TYPE

Constructor Summary

EntityInstanceCache()


Method Summary

protected EnterpriseContext acquireContext()
          Acquires an EnterpriseContext from the pool

protected void activate(EnterpriseContext ctx)
          Activates the given EnterpriseContext

protected boolean canPassivate(EnterpriseContext ctx)
          Returns whether the given context can be passivated or not

Object createCacheKey(Object id)
          Returns the key used to cache the context

void destroy()


protected void freeContext(EnterpriseContext ctx)
          Frees the given EnterpriseContext to the pool

EnterpriseContext get(Object id)
          Gets a bean instance from this cache given the identity.

protected Container getContainer()
          Returns the container for this cache.

protected Object getKey(EnterpriseContext ctx)
          Returns the key used by the cache to map the given context

protected void passivate(EnterpriseContext ctx)
          Passivates the given EnterpriseContext

void remove(String id)


void setContainer(Container c)
          This callback is set by the container so that the plugin may access it

protected void setKey(Object id, EnterpriseContext ctx)
          Sets the given id as key for the given context

Methods inherited from class org.jboss.ejb.plugins.AbstractInstanceCache

create, doActivate, flush, getCache, getCacheLock, getCachePolicyString, getCacheSize, getPassivatedCount, importXml, insert, isActive, logActivation, logPassivation, release, remove, resetStatistic, retrieveStatistic, sample, start, stop, tryToPassivate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.ejb.InstanceCache

flush, getCacheSize, insert, isActive, release, remove

Methods inherited from interface org.jboss.system.Service

create, start, stop

Methods inherited from interface org.jboss.ejb.plugins.AbstractInstanceCacheMBean

flush, getCachePolicyString, getCacheSize, getPassivatedCount, remove

Constructor Detail

EntityInstanceCache

public EntityInstanceCache()

Method Detail

setContainer

public void setContainer(Container c)

Description copied from interface: ContainerPlugin

This callback is set by the container so that the plugin may access it

Specified by:: setContainer in interface ContainerPlugin

Parameters:: c - The container using this plugin. This may be null if the plugin is being disassociated from a container.

createCacheKey

public Object createCacheKey(Object id)

Description copied from interface: EntityCache

Returns the key used to cache the context

Specified by:: createCacheKey in interface EntityCache

Parameters:: id - Object id / primary key
Returns:: Cache key

get

public EnterpriseContext get(Object id)
                      throws RemoteException,
                             NoSuchObjectException

Description copied from interface: InstanceCache

Gets a bean instance from this cache given the identity. This method may involve activation if the instance is not in the cache.

Implementation should have O(1) complexity.

This method is never called for stateless session beans.

Specified by:: get in interface InstanceCache
Overrides:: get in class AbstractInstanceCache

Throws:: RemoteException; NoSuchObjectException

remove

public void remove(String id)
            throws Exception

Specified by:: remove in interface EntityInstanceCacheMBean

Throws:: Exception

destroy

public void destroy()

Specified by:: destroy in interface org.jboss.system.Service
Overrides:: destroy in class AbstractInstanceCache