javax.jms
Interface XASession

All Superinterfaces:

Runnable, Session

All Known Subinterfaces:

XAQueueSession, XATopicSession

public interface XASession

extends Session

The XASession interface extends the capability of Session by adding access to a JMS provider's support for the Java Transaction API (JTA) (optional). This support takes the form of a javax.transaction.xa.XAResource object. The functionality of this object closely resembles that defined by the standard X/Open XA Resource interface.

An application server controls the transactional assignment of an XASession by obtaining its XAResource. It uses the XAResource to assign the session to a transaction, prepare and commit work on the transaction, and so on.

An XAResource provides some fairly sophisticated facilities for interleaving work on multiple transactions, recovering a list of transactions in progress, and so on. A JTA aware JMS provider must fully implement this functionality. This could be done by using the services of a database that supports XA, or a JMS provider may choose to implement this functionality from scratch.

A client of the application server is given what it thinks is a regular JMS Session. Behind the scenes, the application server controls the transaction management of the underlying XASession.

Version:

1.0 - 13 August 1998

Author:

Mark Hapner, Rich Burridge

See Also:

Session

Field Summary

Fields inherited from interface javax.jms.Session

AUTO_ACKNOWLEDGE, CLIENT_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE

Method Summary

void	commit() Throws a TransactionInProgressException, since it should not be called for an XASession object.
boolean	getTransacted() Indicates whether the session is in transacted mode.
XAResource	getXAResource() Returns an XA resource to the caller.
void	rollback() Throws a TransactionInProgressException, since it should not be called for an XASession object.

Methods inherited from interface javax.jms.Session

close, createBytesMessage, createMapMessage, createMessage, createObjectMessage, createObjectMessage, createStreamMessage, createTextMessage, createTextMessage, getMessageListener, recover, run, setMessageListener

Method Detail

getXAResource

public XAResource getXAResource()

Returns an XA resource to the caller.

Returns:

an XA resource to the caller

getTransacted

public boolean getTransacted()
                      throws JMSException

Indicates whether the session is in transacted mode.

Specified by:

getTransacted in interface Session

Returns:

true

Throws:

JMSException - if the JMS provider fails to return the transaction mode due to some internal error.

commit

public void commit()
            throws JMSException

Throws a TransactionInProgressException, since it should not be called for an XASession object.

Specified by:

commit in interface Session

Throws:

TransactionInProgressException - if the method is called on an XASession.

JMSException - if the JMS provider fails to commit the transaction due to some internal error.

rollback

public void rollback()
              throws JMSException

Throws a TransactionInProgressException, since it should not be called for an XASession object.

Specified by:

rollback in interface Session

Throws:

TransactionInProgressException - if the method is called on an XASession.

JMSException - if the JMS provider fails to roll back the transaction due to some internal error.