org.hibernate.context
Class JTASessionContext

java.lang.Object
  org.hibernate.context.JTASessionContext

All Implemented Interfaces:

Serializable, CurrentSessionContext

public class JTASessionContext
extends Object
implements CurrentSessionContext

An implementation of CurrentSessionContext which scopes the notion of a current session to a JTA transaction. Because JTA gives us a nice tie-in to clean up after ourselves, this implementation will generate Sessions as needed provided a JTA transaction is in effect. If a session is not already associated with the current JTA transaction at the time currentSession() is called, a new session will be opened and it will be associated with that JTA transaction.

Note that the sessions returned from this method are automatically configured with both the auto-flush and auto-close attributes set to true, meaning that the Session will be automatically flushed and closed as part of the lifecycle for the JTA transaction to which it is associated. Additionally, it will also be configured to aggressively release JDBC connections after each statement is executed. These settings are governed by the isAutoFlushEnabled(), isAutoCloseEnabled(), and getConnectionReleaseMode() methods; these are provided (along with the buildOrObtainSession() method) for easier subclassing for custom JTA-based session tracking logic (like maybe long-session semantics).

Author:

Steve Ebersole

See Also:

Serialized Form

Nested Class Summary

protected static class

JTASessionContext.CleanupSynch JTA transaction synch used for cleanup of the internal session map.

Field Summary

protected SessionFactoryImplementor

factory

Constructor Summary

JTASessionContext(SessionFactoryImplementor factory)

Method Summary

protected Session	buildOrObtainSession() Strictly provided for subclassing purposes; specifically to allow long-session support.
Session	currentSession() Retrieve the current session according to the scoping defined by this implementation.
protected ConnectionReleaseMode	getConnectionReleaseMode() Mainly for subclass usage.
protected boolean	isAutoCloseEnabled() Mainly for subclass usage.
protected boolean	isAutoFlushEnabled() Mainly for subclass usage.

Methods inherited from class java.lang.Object

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

Field Detail

factory

protected final SessionFactoryImplementor factory

Constructor Detail

JTASessionContext

public JTASessionContext(SessionFactoryImplementor factory)

Method Detail

currentSession

public Session currentSession()
                       throws HibernateException

Description copied from interface: CurrentSessionContext

Retrieve the current session according to the scoping defined by this implementation.

Specified by:

currentSession in interface CurrentSessionContext

Returns:

The current session.

Throws:

HibernateException - Typically indicates an issue locating or creating the current session.

buildOrObtainSession

protected Session buildOrObtainSession()

Strictly provided for subclassing purposes; specifically to allow long-session support.

This implementation always just opens a new session.

Returns:

the built or (re)obtained session.

isAutoCloseEnabled

protected boolean isAutoCloseEnabled()

Mainly for subclass usage. This impl always returns true.

Returns:

Whether or not the the session should be closed by transaction completion.

isAutoFlushEnabled

protected boolean isAutoFlushEnabled()

Mainly for subclass usage. This impl always returns true.

Returns:

Whether or not the the session should be flushed prior transaction completion.

getConnectionReleaseMode

protected ConnectionReleaseMode getConnectionReleaseMode()

Mainly for subclass usage. This impl always returns after_statement.

Returns:

The connection release mode for any built sessions.