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

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org.jboss.ejb.plugins.cmp.jdbc
Class JDBCStoreManager

java.lang.Object
  org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager

All Implemented Interfaces:

AllowedOperationsFlags, ContainerPlugin, EntityPersistenceStore, JDBCEntityPersistenceStore, org.jboss.system.Service

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public final class JDBCStoreManager

extends Object

implements JDBCEntityPersistenceStore

JDBCStoreManager manages storage of persistence data into a table. Other then loading the initial jbosscmp-jdbc.xml file this class does very little. The interesting tasks are performed by the command classes. Life-cycle: Tied to the life-cycle of the entity container. Multiplicity: One per cmp entity bean. This could be less if another implementaion of EntityPersistenceStore is created and thoes beans use the implementation

Version:

$Revision: 1.70 $

Author:

Dain Sundstrom, Alex Loubyansky

See Also:

EntityPersistenceStore

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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

JDBCStoreManager()

 

Method Summary
void	activateEntity(EntityEnterpriseContext ctx)           This method is called when an entity shall be activated.
void	create()           Does almost nothing because other services such as JDBC data sources may not have been started.
Object	createBeanClassInstance()           Returns a new instance of a class which implemnts the bean class.
Object	createEntity(Method createMethod, 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)           This method is called when collections of entities are to be found.
Object	findEntity(Method finderMethod, Object[] args, EntityEnterpriseContext ctx, GenericEntityObjectFactory factory)           This method is called when single entities are to be found.
Object	getApplicationData(Object key)
Map	getApplicationDataMap()
Object	getApplicationTxData(Object key)
Catalog	getCatalog()
JDBCCommandFactory	getCommandFactory()
EntityContainer	getContainer()           Gets the container for this entity.
JDBCAbstractEntityBridge	getEntityBridge()
Object	getEntityTxData(Object key)
JDBCTypeFactory	getJDBCTypeFactory()
JDBCEntityMetaData	getMetaData()
JDBCQueryManager	getQueryManager()
ReadAheadCache	getReadAheadCache()
void	initEntity(EntityEnterpriseContext ctx)           Initializes the instance context.
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)           Loads entity.
boolean	loadEntity(EntityEnterpriseContext ctx, boolean failIfNotFound)
void	loadField(JDBCCMPFieldBridge field, EntityEnterpriseContext ctx)
Collection	loadRelation(JDBCCMRFieldBridge cmrField, Object pk)
void	passivateEntity(EntityEnterpriseContext ctx)           This method is called when an entity shall be passivate.
Object	postCreateEntity(Method createMethod, Object[] args, EntityEnterpriseContext ctx)           This method is called after the createEntity.
void	putApplicationData(Object key, Object value)
void	putApplicationTxData(Object key, Object value)
void	putEntityTxData(Object key, Object value)
void	removeEntity(EntityEnterpriseContext ctx)           This method is called when an entity shall be removed from the underlying storage.
void	removeEntityTxData(Object key)
void	scheduleCascadeDelete(List pks)           Schedules instances for cascade-delete
void	setContainer(Container container)           Sets the container for this entity.
void	start()           Bring the store to a fully initialized state
void	stop()
void	storeEntity(EntityEnterpriseContext ctx)           This method is called whenever an entity shall be stored to the underlying storage.
boolean	unscheduledCascadeDelete(Object pk)           Unschedules instance cascade delete.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

JDBCStoreManager

public JDBCStoreManager()

Method Detail

getContainer

public EntityContainer getContainer()

Gets the container for this entity.

Specified by:

getContainer in interface JDBCEntityPersistenceStore

Returns:

the container for this entity; null if container has not been set

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setContainer

public void setContainer(Container container)

Sets the container for this entity.

Specified by:

setContainer in interface ContainerPlugin

Parameters:

container - the container for this entity

Throws:

ClassCastException - if the container is not an instance of EntityContainer

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getEntityBridge

public JDBCAbstractEntityBridge getEntityBridge()

Specified by:

getEntityBridge in interface JDBCEntityPersistenceStore

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getJDBCTypeFactory

public JDBCTypeFactory getJDBCTypeFactory()

Specified by:

getJDBCTypeFactory in interface JDBCEntityPersistenceStore

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getMetaData

public JDBCEntityMetaData getMetaData()

Specified by:

getMetaData in interface JDBCEntityPersistenceStore

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getQueryManager

public JDBCQueryManager getQueryManager()

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getCommandFactory

public JDBCCommandFactory getCommandFactory()

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getReadAheadCache

public ReadAheadCache getReadAheadCache()

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getApplicationDataMap

public Map getApplicationDataMap()

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getApplicationData

public Object getApplicationData(Object key)

Specified by:

getApplicationData in interface JDBCEntityPersistenceStore

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putApplicationData

public void putApplicationData(Object key,
                               Object value)

Specified by:

putApplicationData in interface JDBCEntityPersistenceStore

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scheduleCascadeDelete

public void scheduleCascadeDelete(List pks)

Schedules instances for cascade-delete

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unscheduledCascadeDelete

public boolean unscheduledCascadeDelete(Object pk)

Unschedules instance cascade delete.

Parameters:

pk - instance primary key.

Returns:

true if the instance was scheduled for cascade deleted.

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getApplicationTxData

public Object getApplicationTxData(Object key)

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putApplicationTxData

public void putApplicationTxData(Object key,
                                 Object value)

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getEntityTxData

public Object getEntityTxData(Object key)

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putEntityTxData

public void putEntityTxData(Object key,
                            Object value)

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removeEntityTxData

public void removeEntityTxData(Object key)

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getCatalog

public Catalog getCatalog()

Specified by:

getCatalog in interface JDBCEntityPersistenceStore

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create

public void create()
            throws Exception

Does almost nothing because other services such as JDBC data sources may not have been started.

Specified by:

create in interface org.jboss.system.Service

Throws:

Exception

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start

public void start()
           throws Exception

Bring the store to a fully initialized state

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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createBeanClassInstance

public Object createBeanClassInstance()
                               throws Exception

Returns a new instance of a class which implemnts the bean class.

Specified by:

createBeanClassInstance in interface EntityPersistenceStore

Returns:

the new instance

Throws:

Exception

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initEntity

public void initEntity(EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

Initializes the instance context.

This method is called before createEntity, and should resetStats the value of all cmpFields to 0 or null.

Specified by:

initEntity in interface EntityPersistenceStore

Parameters:

ctx -

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createEntity

public Object createEntity(Method createMethod,
                           Object[] args,
                           EntityEnterpriseContext ctx)
                    throws javax.ejb.CreateException

Description copied from interface: EntityPersistenceStore

This method is called whenever an entity is to be created. The persistence manager is responsible for handling the results properly wrt the persistent store.

Specified by:

createEntity in interface EntityPersistenceStore

Parameters:

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

args - any create parameters

ctx - the instance being used for this create call

Returns:

The primary key computed by CMP PM or null for BMP

Throws:

javax.ejb.CreateException

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postCreateEntity

public Object postCreateEntity(Method createMethod,
                               Object[] args,
                               EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

This method is called after the createEntity. The persistence manager is responsible for handling the results properly wrt the persistent store.

Specified by:

postCreateEntity in interface EntityPersistenceStore

Parameters:

createMethod - the ejbPostCreate method in the bean class that was called

args - any create parameters

ctx - the instance being used for this create call

Returns:

null

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findEntity

public Object findEntity(Method finderMethod,
                         Object[] args,
                         EntityEnterpriseContext ctx,
                         GenericEntityObjectFactory factory)
                  throws javax.ejb.FinderException

Description copied from interface: EntityPersistenceStore

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, if so it returns the primary key of the object.

Specified by:

findEntity in interface EntityPersistenceStore

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:

a primary key representing the found entity

Throws:

javax.ejb.FinderException

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findEntities

public Collection findEntities(Method finderMethod,
                               Object[] args,
                               EntityEnterpriseContext ctx,
                               GenericEntityObjectFactory factory)
                        throws javax.ejb.FinderException

Description copied from interface: EntityPersistenceStore

This method is called when collections of entities are to be found. The persistence manager must find out whether the wanted instances are available in the persistence store, and if so it must return a collection of primaryKeys.

Specified by:

findEntities in interface EntityPersistenceStore

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 primary key collection representing the found entities

Throws:

javax.ejb.FinderException

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activateEntity

public void activateEntity(EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

This method is called when an entity shall be activated.

With the PersistenceManager factorization most EJB calls should not exists However this calls permits us to introduce optimizations in the persistence store. Particularly the context has a "PersistenceContext" that a PersistenceStore can use (JAWS does for smart updates) and this is as good a callback as any other to set it up.

Specified by:

activateEntity in interface EntityPersistenceStore

Parameters:

ctx - the instance to use for the activation

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loadEntity

public void loadEntity(EntityEnterpriseContext ctx)

Loads entity. If entity not found NoSuchEntityException is thrown.

Specified by:

loadEntity in interface EntityPersistenceStore

Parameters:

ctx - - entity context.

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loadEntity

public boolean loadEntity(EntityEnterpriseContext ctx,
                          boolean failIfNotFound)

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loadField

public void loadField(JDBCCMPFieldBridge field,
                      EntityEnterpriseContext ctx)

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isStoreRequired

public boolean isStoreRequired(EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

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

Specified by:

isStoreRequired in interface EntityPersistenceStore

Parameters:

ctx - the instance to check

Returns:

true, if the entity has been modified

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isModified

public boolean isModified(EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

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 EntityPersistenceStore

Parameters:

ctx -

Returns:

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storeEntity

public void storeEntity(EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

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 EntityPersistenceStore

Parameters:

ctx - the instance to synchronize

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passivateEntity

public void passivateEntity(EntityEnterpriseContext ctx)

Description copied from interface: EntityPersistenceStore

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

See the activate discussion for the reason for exposing EJB callback calls to the store.

Specified by:

passivateEntity in interface EntityPersistenceStore

Parameters:

ctx - the instance to passivate

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removeEntity

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

Description copied from interface: EntityPersistenceStore

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 EntityPersistenceStore

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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loadRelation

public Collection loadRelation(JDBCCMRFieldBridge cmrField,
                               Object pk)

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