jrun.ejb.cache
Class EntityInstanceCache

jrunx.kernel.ServiceAdapter
  |
  +--jrun.ejb.cache.EntityInstanceCache

All Implemented Interfaces:

InstanceCache, javax.naming.Referenceable, java.io.Serializable, Service, ServiceMBean

public class EntityInstanceCache

extends ServiceAdapter

implements InstanceCache

This is a simple LRU entity bean cache, that has a maximum size. When the maximum size is reached the least recently inserted instance is passivated. TODO(paul): * configurable caching policies (Spec requires LRU) * purge sizes * disable purging of instances involved in a transaction. EJB Spec 2.0, Section 6.6 page 68.

Author:

Paul Reilly

See Also:

Serialized Form

Fields inherited from class jrunx.kernel.ServiceAdapter

DEFAULT_DEACTIVATED, DEFAULT_DOMAIN, DOMAIN_NAME_SEPARATOR, DOMAIN_NAME_SUFFIX, domainName, jndiBindable, LOGGER_CACHE_TIME, SCHEDULER_SERVICE, SECURITY_MANAGER, server, status, TRANSACTION_MANAGER

Fields inherited from interface jrunx.kernel.Service

INITIALIZED, STARTED, STARTING, STOPPED, STOPPING, UNINITIALIZED

Constructor Summary

EntityInstanceCache(InstancePool instancePool, EntityPersistenceManager entityPersistenceManager, int maximumSize, java.lang.String containerName)

Method Summary

Instance	get(java.lang.Object id)
int	getMaximumSize()
void	insert(java.lang.Object id, Instance instance)
void	remove(java.lang.Object id)
void	setMaximumSize(int maximumSize)

Methods inherited from class jrunx.kernel.ServiceAdapter

bind, destroy, findObjectInstance, findObjectInstance, findObjectInstance, getBindToJNDI, getDeactivated, getDomainName, getDomainSearchPath, getJRunService, getLogger, getName, getParentService, getReference, getResourceManager, getServerName, getServerProperties, getStatus, init, invokeMethod, isInPartition, isPartition, lookup, postDeregister, postRegister, preDeregister, preRegister, requestServer, scheduleRunnable, setBindToJNDI, setDeactivated, setDomainName, setName, setParentService, start, stop, toString, unbind, unscheduleRunnable, updateStatus

Constructor Detail

EntityInstanceCache

public EntityInstanceCache(InstancePool instancePool,
                           EntityPersistenceManager entityPersistenceManager,
                           int maximumSize,
                           java.lang.String containerName)

Method Detail

getMaximumSize

public int getMaximumSize()

setMaximumSize

public void setMaximumSize(int maximumSize)

get

public Instance get(java.lang.Object id)

Specified by:

get in interface InstanceCache

Parameters:

id - the id for the cached entity bean.

insert

public void insert(java.lang.Object id,
                   Instance instance)
            throws javax.ejb.EJBException,
                   java.rmi.RemoteException

Specified by:

insert in interface InstanceCache

Parameters:

instance - the entity bean object to be cached.

remove

public void remove(java.lang.Object id)
            throws java.util.NoSuchElementException

Specified by:

remove in interface InstanceCache

Parameters:

id - the primary key for the cached entity bean.