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

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org.jboss.ejb.plugins
Class CMPPersistenceManager

java.lang.Object
  org.jboss.ejb.plugins.CMPPersistenceManager

All Implemented Interfaces:

AllowedOperationsFlags, ContainerPlugin, EntityPersistenceManager, org.jboss.system.Service

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public class CMPPersistenceManager

extends Object

implements EntityPersistenceManager

The CMP Persistence Manager implements the semantics of the CMP EJB 1.1 call back specification.

This Manager works with a "EntityPersistenceStore" that takes care of the physical storing of instances (JAWS, JDBC O/R, FILE, Object).

Version:

$Revision: 1.56 $

Author:

Marc Fleury, Dan Christopherson, Bill Burke, Andreas Schaefer, Dain Sundstrom, Alex Loubyansky

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Field Summary

 

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

 

Constructor Summary

CMPPersistenceManager()

 

Method Summary
void	activateEntity(EntityEnterpriseContext ctx)           This method is called when an entity shall be activated.
void	create()
Object	createBeanClassInstance()           Returns a new instance of the bean class or a subclass of the bean class.
void	createEntity(Method m, Object[] args, EntityEnterpriseContext ctx)           This method is called whenever an entity is to be created.
void	destroy()
Collection	findEntities(Method finderMethod, Object[] args, EntityEnterpriseContext ctx, GenericEntityObjectFactory factory)           find multiple entities
Object	findEntity(Method finderMethod, Object[] args, EntityEnterpriseContext ctx, GenericEntityObjectFactory factory)           This method is called when single entities are to be found.
EntityPersistenceStore	getPersistenceStore()           Gets the entity persistence store.
void	invokeEjbStore(EntityEnterpriseContext ctx)           Invokes ejbStore on the instance.
protected  void	invokeLoad(EntityEnterpriseContext ctx)
boolean	isModified(EntityEnterpriseContext ctx)           This method is used to determined whether the instance was modified.
boolean	isStoreRequired(EntityEnterpriseContext ctx)           This method is used to determine if an entity should be stored.
void	loadEntity(EntityEnterpriseContext ctx)           This method is called whenever an entity shall be load from the underlying storage.
void	passivateEntity(EntityEnterpriseContext ctx)           This method is called when an entity shall be passivate.
void	postCreateEntity(Method m, Object[] args, EntityEnterpriseContext ctx)           This method is called whenever an entity is to be created.
void	removeEntity(EntityEnterpriseContext ctx)           This method is called when an entity shall be removed from the underlying storage.
void	setContainer(Container c)           This callback is set by the container so that the plugin may access it
void	setPersistenceStore(EntityPersistenceStore store)
void	start()
void	stop()
void	storeEntity(EntityEnterpriseContext ctx)           This method is called whenever an entity shall be stored to the underlying storage.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

CMPPersistenceManager

public CMPPersistenceManager()

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.

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getPersistenceStore

public EntityPersistenceStore getPersistenceStore()

Gets the entity persistence store.

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setPersistenceStore

public void setPersistenceStore(EntityPersistenceStore store)

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create

public void create()
            throws Exception

Specified by:

create in interface org.jboss.system.Service

Throws:

Exception

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createBeanClassInstance

public Object createBeanClassInstance()
                               throws Exception

Returns a new instance of the bean class or a subclass of the bean class.

Specified by:

createBeanClassInstance in interface EntityPersistenceManager

Returns:

the new instance

Throws:

Exception

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start

public void start()
           throws Exception

Specified by:

start in interface org.jboss.system.Service

Throws:

Exception

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stop

public void stop()

Specified by:

stop in interface org.jboss.system.Service

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destroy

public void destroy()

Specified by:

destroy in interface org.jboss.system.Service

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createEntity

public void createEntity(Method m,
                         Object[] args,
                         EntityEnterpriseContext ctx)
                  throws Exception

Description copied from interface: EntityPersistenceManager

This method is called whenever an entity is to be created. The persistence manager is responsible for calling the ejbCreate method on the instance and to handle the results properly wrt the persistent store.

Specified by:

createEntity in interface EntityPersistenceManager

Parameters:

m - the create method in the home interface that was called

args - any create parameters

ctx - the instance being used for this create call

Throws:

Exception

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postCreateEntity

public void postCreateEntity(Method m,
                             Object[] args,
                             EntityEnterpriseContext ctx)
                      throws Exception

Description copied from interface: EntityPersistenceManager

This method is called whenever an entity is to be created. The persistence manager is responsible for calling the ejbPostCreate method on the instance and to handle the results properly wrt the persistent store.

Specified by:

postCreateEntity in interface EntityPersistenceManager

Parameters:

m - the create method in the home interface that was called

args - any create parameters

ctx - the instance being used for this create call

Throws:

Exception

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findEntity

public Object findEntity(Method finderMethod,
                         Object[] args,
                         EntityEnterpriseContext ctx,
                         GenericEntityObjectFactory factory)
                  throws Exception

Description copied from interface: EntityPersistenceManager

This method is called when single entities are to be found. The persistence manager must find out whether the wanted instance is available in the persistence store, and if so it shall use the EJBProxyFactory plugin to create an EJBObject to the instance, which is to be returned as result.

Specified by:

findEntity in interface EntityPersistenceManager

Parameters:

finderMethod - the find method in the home interface that was called

args - any finder parameters

ctx - the instance to use for the finder call

Returns:

an EJBObject representing the found entity

Throws:

Exception

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findEntities

public Collection findEntities(Method finderMethod,
                               Object[] args,
                               EntityEnterpriseContext ctx,
                               GenericEntityObjectFactory factory)
                        throws Exception

find multiple entities

Specified by:

findEntities in interface EntityPersistenceManager

Parameters:

finderMethod - the find method in the home interface that was called

args - any finder parameters

ctx - the instance to use for the finder call

Returns:

an EJBObject collection representing the found entities

Throws:

Exception

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activateEntity

public void activateEntity(EntityEnterpriseContext ctx)
                    throws RemoteException

Description copied from interface: EntityPersistenceManager

This method is called when an entity shall be activated. The persistence manager must call the ejbActivate method on the instance.

Specified by:

activateEntity in interface EntityPersistenceManager

Parameters:

ctx - the instance to use for the activation

Throws:

RemoteException - thrown if some system exception occurs

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loadEntity

public void loadEntity(EntityEnterpriseContext ctx)
                throws RemoteException

Description copied from interface: EntityPersistenceManager

This method is called whenever an entity shall be load from the underlying storage. The persistence manager must load the state from the underlying storage and then call ejbLoad on the supplied instance.

Specified by:

loadEntity in interface EntityPersistenceManager

Parameters:

ctx - the instance to synchronize

Throws:

RemoteException - thrown if some system exception occurs

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isStoreRequired

public boolean isStoreRequired(EntityEnterpriseContext ctx)
                        throws Exception

Description copied from interface: EntityPersistenceManager

This method is used to determine if an entity should be stored.

Specified by:

isStoreRequired in interface EntityPersistenceManager

Parameters:

ctx - the instance to check

Returns:

true, if the entity has been modified

Throws:

Exception - thrown if some system exception occurs

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isModified

public boolean isModified(EntityEnterpriseContext ctx)
                   throws Exception

Description copied from interface: EntityPersistenceManager

This method is used to determined whether the instance was modified. NOTE, even if the method returns true the isStoreRequired for this same instance might return false, e.g. a CMR field that doesn't have a foreign key was modified.

Specified by:

isModified in interface EntityPersistenceManager

Parameters:

ctx -

Returns:

Throws:

Exception

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storeEntity

public void storeEntity(EntityEnterpriseContext ctx)
                 throws RemoteException

Description copied from interface: EntityPersistenceManager

This method is called whenever an entity shall be stored to the underlying storage. The persistence manager must call ejbStore on the supplied instance and then store the state to the underlying storage.

Specified by:

storeEntity in interface EntityPersistenceManager

Parameters:

ctx - the instance to synchronize

Throws:

RemoteException - thrown if some system exception occurs

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invokeEjbStore

public void invokeEjbStore(EntityEnterpriseContext ctx)
                    throws RemoteException

Description copied from interface: EntityPersistenceManager

Invokes ejbStore on the instance.

Specified by:

invokeEjbStore in interface EntityPersistenceManager

Parameters:

ctx -

Throws:

RemoteException

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passivateEntity

public void passivateEntity(EntityEnterpriseContext ctx)
                     throws RemoteException

Description copied from interface: EntityPersistenceManager

This method is called when an entity shall be passivate. The persistence manager must call the ejbPassivate method on the instance.

Specified by:

passivateEntity in interface EntityPersistenceManager

Parameters:

ctx - the instance to passivate

Throws:

RemoteException - thrown if some system exception occurs

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removeEntity

public void removeEntity(EntityEnterpriseContext ctx)
                  throws RemoteException,
                         javax.ejb.RemoveException

Description copied from interface: EntityPersistenceManager

This method is called when an entity shall be removed from the underlying storage. The persistence manager must call ejbRemove on the instance and then remove its state from the underlying storage.

Specified by:

removeEntity in interface EntityPersistenceManager

Parameters:

ctx - the instance to remove

Throws:

javax.ejb.RemoveException - thrown if the instance could not be removed

RemoteException - thrown if some system exception occurs

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invokeLoad

protected void invokeLoad(EntityEnterpriseContext ctx)
                   throws RemoteException

Throws:

RemoteException

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