org.eclipse.persistence.sessions
Interface DatabaseSession
- All Superinterfaces:
- Session
- All Known Subinterfaces:
- Server
- All Known Implementing Classes:
- org.eclipse.persistence.internal.sessions.DatabaseSessionImpl, ServerSession, SessionBroker
public interface DatabaseSession
- extends Session
Purpose: Add login and configuration API to that of Session.
This interface is to be used during the creation and login of the session only.
The Session interface should be used after login for normal reading/writing.
Method Summary |
void |
addDescriptor(ClassDescriptor descriptor)
PUBLIC:
Add the descriptor to the session. |
void |
addDescriptors(java.util.Collection descriptors)
PUBLIC:
Add the descriptors to the session. |
void |
addDescriptors(Project project)
PUBLIC:
Add the descriptors to the session from the Project. |
void |
beginTransaction()
PUBLIC:
Begin a transaction on the database. |
void |
commitTransaction()
PUBLIC:
Commit the active database transaction. |
void |
deleteAllObjects(java.util.Collection domainObjects)
PUBLIC:
delete all of the objects and all of their privately owned parts in the database. |
java.lang.Object |
deleteObject(java.lang.Object domainObject)
PUBLIC:
Delete the object and all of its privately owned parts from the database. |
CommandManager |
getCommandManager()
ADVANCED:
Return the CommandManager that allows this session to act as a
CommandProcessor and receive or propagate commands from/to the
EclipseLink cluster. |
SequencingControl |
getSequencingControl()
PUBLIC:
Return SequencingControl which used for sequencing setup and
customization including management of sequencing preallocation. |
ServerPlatform |
getServerPlatform()
PUBLIC:
Answer the server platform defining server-specific behavior for the receiver (Oc4j, WLS, ...). |
java.lang.Object |
insertObject(java.lang.Object domainObject)
PUBLIC:
Insert the object and all of its privately owned parts into the database. |
boolean |
isInTransaction()
PUBLIC:
Return if the session is currently in the progress of a database transaction. |
void |
login()
PUBLIC:
Connect to the database using the predefined login. |
void |
login(Login login)
PUBLIC:
Connect to the database using the given login. |
void |
login(java.lang.String userName,
java.lang.String password)
PUBLIC:
Connect to the database using the given user name and password. |
void |
logout()
PUBLIC:
Disconnect from the database. |
java.lang.Object |
refreshAndLockObject(java.lang.Object object)
PUBLIC:
Refresh the attributes of the object and of all of its private parts from the database. |
java.lang.Object |
refreshAndLockObject(java.lang.Object object,
short lockMode)
PUBLIC:
Refresh the attributes of the object and of all of its private parts from the database. |
void |
rollbackTransaction()
PUBLIC:
Rollback the active database transaction. |
void |
setCommandManager(CommandManager commandManager)
ADVANCED:
Set the CommandManager that allows this session to act as a
CommandProcessor and receive or propagate commands from/to the
EclipseLink cluster. |
void |
setDatasourceLogin(Login login)
PUBLIC:
Set the login. |
void |
setExternalTransactionController(ExternalTransactionController etc)
PUBLIC:
Used for JTS integration. |
void |
setLogin(Login login)
PUBLIC:
Set the login. |
void |
setServerPlatform(ServerPlatform newServerPlatform)
PUBLIC:
Set the server platform defining server-specific behavior for the receiver (Oc4j, WLS, ... ). |
void |
setShouldPropagateChanges(boolean choice)
ADVANCED:
Set if cache changes should be propagated to other sessions or applications
in a EclipseLink cluster through the Remote Command Manager mechanism. |
boolean |
shouldPropagateChanges()
ADVANCED:
Return whether changes should be propagated to other sessions or applications
in a EclipseLink cluster through the Remote Command Manager mechanism. |
java.lang.Object |
updateObject(java.lang.Object domainObject)
PUBLIC:
Update the object and all of its privately owned parts in the database. |
void |
writeAllObjects(java.util.Collection domainObjects)
PUBLIC:
Write all of the objects and all of their privately owned parts in the database. |
java.lang.Object |
writeObject(java.lang.Object domainObject)
PUBLIC:
Write the object and all of its privately owned parts in the database. |
Methods inherited from interface org.eclipse.persistence.sessions.Session |
acquireHistoricalSession, acquireUnitOfWork, acquireUnitOfWork, addJPAQuery, addQuery, clearIntegrityChecker, clearProfile, containsQuery, copyObject, copyObject, doesObjectExist, dontLogMessages, executeNonSelectingCall, executeNonSelectingSQL, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeQuery, executeSelectingCall, executeSQL, getActiveSession, getActiveUnitOfWork, getAsOfClause, getClassDescriptor, getClassDescriptor, getClassDescriptorForAlias, getDatasourceLogin, getDatasourcePlatform, getDefaultReferenceMode, getDescriptor, getDescriptor, getDescriptorForAlias, getDescriptors, getEventManager, getExceptionHandler, getExternalTransactionController, getIdentityMapAccessor, getIntegrityChecker, getJPAQueries, getLog, getLogin, getLogLevel, getLogLevel, getName, getNextSequenceNumberValue, getPlatform, getProfiler, getProject, getProperties, getProperty, getQueries, getQuery, getQuery, getSessionLog, handleException, handleSevere, hasDescriptor, hasExceptionHandler, hasExternalTransactionController, isClientSession, isConnected, isDatabaseSession, isDistributedSession, isFinalizersEnabled, isInProfile, isRemoteSession, isRemoteUnitOfWork, isServerSession, isSessionBroker, isUnitOfWork, keyFromObject, log, logMessage, readAllObjects, readAllObjects, readAllObjects, readObject, readObject, readObject, readObject, refreshObject, release, removeProperty, removeQuery, setDefaultReferenceMode, setExceptionHandler, setIntegrityChecker, setIsFinalizersEnabled, setLog, setLogLevel, setName, setProfiler, setProperty, setSessionLog, shouldLog, shouldLogMessages, validateCache |
addDescriptor
void addDescriptor(ClassDescriptor descriptor)
- PUBLIC:
Add the descriptor to the session.
All persistent classes must have a descriptor registered for them with the session.
It is best to add the descriptors before login, if added after login the order in which
descriptors are added is dependent on inheritance and references unless the addDescriptors
method is used.
- See Also:
addDescriptors(Collection)
,
addDescriptors(Project)
addDescriptors
void addDescriptors(java.util.Collection descriptors)
- PUBLIC:
Add the descriptors to the session.
All persistent classes must have a descriptor registered for them with the session.
This method allows for a batch of descriptors to be added at once so that EclipseLink
can resolve the dependencies between the descriptors and perform initialization optimally.
addDescriptors
void addDescriptors(Project project)
- PUBLIC:
Add the descriptors to the session from the Project.
This can be used to combine the descriptors from multiple projects into a single session.
This can be called after the session has been connected as long as there are no external dependencies.
beginTransaction
void beginTransaction()
throws DatabaseException
- PUBLIC:
Begin a transaction on the database.
This allows a group of database modification to be committed or rolledback as a unit.
All writes/deletes will be sent to the database be will not be visible to other users until commit.
Although databases do not allow nested transaction,
EclipseLink supports nesting through only committing to the database on the outer commit.
- Throws:
DatabaseException
- if the database connection is lost or the begin is rejected.- See Also:
isInTransaction()
commitTransaction
void commitTransaction()
throws DatabaseException
- PUBLIC:
Commit the active database transaction.
This allows a group of database modification to be committed or rolledback as a unit.
All writes/deletes will be sent to the database be will not be visible to other users until commit.
Although databases do not allow nested transaction,
EclipseLink supports nesting through only committing to the database on the outer commit.
- Throws:
DatabaseException
- most databases validate changes as they are done,
normally errors do not occur on commit unless the disk fails or the connection is lost.
ConcurrencyException
- if this session is not within a transaction.
deleteAllObjects
void deleteAllObjects(java.util.Collection domainObjects)
- PUBLIC:
delete all of the objects and all of their privately owned parts in the database.
The allows for a group of objects to be deleted as a unit.
The objects will be deleted through a single transactions.
- Throws:
DatabaseException
- if an error occurs on the database,
these include constraint violations, security violations and general database errors.
OptimisticLockException
- if the object's descriptor is using optimistic locking and
the object has been updated or deleted by another user since it was last read.
deleteObject
java.lang.Object deleteObject(java.lang.Object domainObject)
throws DatabaseException,
OptimisticLockException
- PUBLIC:
Delete the object and all of its privately owned parts from the database.
The delete operation can be customized through using a delete query.
- Throws:
DatabaseException
OptimisticLockException
- See Also:
DeleteObjectQuery
insertObject
java.lang.Object insertObject(java.lang.Object domainObject)
throws DatabaseException
- PUBLIC:
Insert the object and all of its privately owned parts into the database.
Insert should only be used if the application knows that the object is new,
otherwise writeObject should be used.
The insert operation can be customized through using an insert query.
- Throws:
DatabaseException
- See Also:
InsertObjectQuery
,
writeObject(Object)
isInTransaction
boolean isInTransaction()
- PUBLIC:
Return if the session is currently in the progress of a database transaction.
Because nested transactions are allowed check if the transaction mutex has been acquired.
setServerPlatform
void setServerPlatform(ServerPlatform newServerPlatform)
- PUBLIC:
Set the server platform defining server-specific behavior for the receiver (Oc4j, WLS, ... ).
This is not permitted after the session is logged in.
If the user wants a different external transaction controller class or
to provide some different behavior than the provided ServerPlatform(s), we recommend
subclassing org.eclipse.persistence.platform.server.ServerPlatformBase (or a subclass),
and overriding:
ServerPlatformBase.getExternalTransactionControllerClass()
ServerPlatformBase.registerMBean()
ServerPlatformBase.unregisterMBean()
for the desired behavior.
- See Also:
ServerPlatformBase
getServerPlatform
ServerPlatform getServerPlatform()
- PUBLIC:
Answer the server platform defining server-specific behavior for the receiver (Oc4j, WLS, ...).
If the user wants a different external transaction controller class or
to provide some different behavior than the provided ServerPlatform(s), we recommend
subclassing org.eclipse.persistence.platform.server.ServerPlatformBase (or a subclass),
and overriding:
ServerPlatformBase.getExternalTransactionControllerClass()
ServerPlatformBase.registerMBean()
ServerPlatformBase.unregisterMBean()
for the desired behavior.
- Specified by:
getServerPlatform
in interface Session
- See Also:
ServerPlatformBase
getSequencingControl
SequencingControl getSequencingControl()
- PUBLIC:
Return SequencingControl which used for sequencing setup and
customization including management of sequencing preallocation.
login
void login()
throws DatabaseException
- PUBLIC:
Connect to the database using the predefined login.
The login must have been assign when or after creating the session.
- Throws:
DatabaseException
- See Also:
login(Login)
login
void login(java.lang.String userName,
java.lang.String password)
throws DatabaseException
- PUBLIC:
Connect to the database using the given user name and password.
The additional login information must have been preset in the session's login attribute.
This is the login that should be used if each user has their own id,
but all users share the same database configuration.
Under this login mode the password should not stay within the login definition after login.
- Throws:
DatabaseException
login
void login(Login login)
throws DatabaseException
- PUBLIC:
Connect to the database using the given login.
The login may also the preset and the login() protocol called.
This is the login should only be used if each user has their own database configuration.
Under this login mode the password should not stay within the login definition after login.
- Throws:
DatabaseException
logout
void logout()
throws DatabaseException
- PUBLIC:
Disconnect from the database.
- Throws:
EclipseLinkException
- if a transaction is active, you must rollback any active transaction before logout.
DatabaseException
- the database will also raise an error if their is an active transaction,
or a general error occurs.
refreshAndLockObject
java.lang.Object refreshAndLockObject(java.lang.Object object)
- PUBLIC:
Refresh the attributes of the object and of all of its private parts from the database.
The object will be pessimistically locked on the database for the duration of the transaction.
If the object is already locked this method will wait until the lock is released.
A no wait option is available through setting the lock mode.
- See Also:
#refreshAndLockObject(Object, lockMode)
refreshAndLockObject
java.lang.Object refreshAndLockObject(java.lang.Object object,
short lockMode)
- PUBLIC:
Refresh the attributes of the object and of all of its private parts from the database.
The object will be pessimistically locked on the database for the duration of the transaction.
Lock Modes: ObjectBuildingQuery.NO_LOCK, LOCK, LOCK_NOWAIT
rollbackTransaction
void rollbackTransaction()
throws DatabaseException
- PUBLIC:
Rollback the active database transaction.
This allows a group of database modification to be committed or rolled back as a unit.
All writes/deletes will be sent to the database be will not be visible to other users until commit.
Although databases do not allow nested transaction,
EclipseLink supports nesting through only committing to the database on the outer commit.
- Throws:
DatabaseException
- if the database connection is lost or the rollback fails.
ConcurrencyException
- if this session is not within a transaction.
setExternalTransactionController
void setExternalTransactionController(ExternalTransactionController etc)
- PUBLIC:
Used for JTS integration. If your application requires to have JTS control transactions instead of EclipseLink an
external transaction controller must be specified. EclipseLink provides JTS controllers for JTS 1.0 and Weblogic's JTS.
- Specified by:
setExternalTransactionController
in interface Session
- See Also:
JTATransactionController
,
CustomServerPlatform
getCommandManager
CommandManager getCommandManager()
- ADVANCED:
Return the CommandManager that allows this session to act as a
CommandProcessor and receive or propagate commands from/to the
EclipseLink cluster.
This can be set to enable cache synchronization in a clustered environment where
multiple servers in the cluster update the same database.
- Returns:
- The CommandManager instance that controls the remote command
service for this session.
- See Also:
CommandManager
setCommandManager
void setCommandManager(CommandManager commandManager)
- ADVANCED:
Set the CommandManager that allows this session to act as a
CommandProcessor and receive or propagate commands from/to the
EclipseLink cluster.
This can be used to enable cache synchronization in a clustered environment where
multiple servers in the cluster update the same database.
To enable cache synchronization you must also set, setShouldPropagateChanges to true.
- Parameters:
commandManager
- The CommandManager instance to control the remote command
service for this session.- See Also:
setShouldPropagateChanges(boolean)
,
CommandManager
setShouldPropagateChanges
void setShouldPropagateChanges(boolean choice)
- ADVANCED:
Set if cache changes should be propagated to other sessions or applications
in a EclipseLink cluster through the Remote Command Manager mechanism.
This can be used to enable cache synchronization in a clustered environment where
multiple servers in the cluster update the same database.
In order for this to occur the CommandManager must be set.
- Parameters:
choice
- If true (and the CommandManager is set) then propagation will occur.- See Also:
setCommandManager(CommandManager)
shouldPropagateChanges
boolean shouldPropagateChanges()
- ADVANCED:
Return whether changes should be propagated to other sessions or applications
in a EclipseLink cluster through the Remote Command Manager mechanism. In order for
this to occur the CommandManager must be set.
- Returns:
- true if propagation is set to occur, false if not.
- See Also:
setCommandManager(CommandManager)
setLogin
void setLogin(Login login)
- PUBLIC:
Set the login.
setDatasourceLogin
void setDatasourceLogin(Login login)
- PUBLIC:
Set the login.
updateObject
java.lang.Object updateObject(java.lang.Object domainObject)
throws DatabaseException,
OptimisticLockException
- PUBLIC:
Update the object and all of its privately owned parts in the database.
Update should only be used if the application knows that the object is new,
otherwise writeObject should be used.
The update operation can be customized through using an update query.
- Throws:
DatabaseException
OptimisticLockException
- See Also:
UpdateObjectQuery
,
writeObject(Object)
writeAllObjects
void writeAllObjects(java.util.Collection domainObjects)
- PUBLIC:
Write all of the objects and all of their privately owned parts in the database.
The allows for a group of objects to be committed as a unit.
The objects will be committed through a single transactions.
- Throws:
DatabaseException
- if an error occurs on the database,
these include constraint violations, security violations and general database errors.
OptimisticLockException
- if the object's descriptor is using optimistic locking and
the object has been updated or deleted by another user since it was last read.
writeObject
java.lang.Object writeObject(java.lang.Object domainObject)
throws DatabaseException,
OptimisticLockException
- PUBLIC:
Write the object and all of its privately owned parts in the database.
Write will determine if an insert or an update should be done,
it may go to the database to determine this (by default will check the identity map).
The write operation can be customized through using an write query.
- Throws:
DatabaseException
OptimisticLockException
- See Also:
WriteObjectQuery
,
insertObject(Object)
,
updateObject(Object)