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.

The XASession interface is optional. JMS providers are not required to support this interface. For use by JMS providers to support transactional environments. Client programs are strongly encouraged to use the transactional support available in their environment, rather than use these XA interfaces directly.

Version:
1.1 February 2, 2002
Author:
Mark Hapner, Rich Burridge, Kate Stout
See Also:
Session

Field Summary
 
Fields inherited from interface javax.jms.Session
AUTO_ACKNOWLEDGE, CLIENT_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE, SESSION_TRANSACTED
 
Method Summary
 void commit()
          Throws a TransactionInProgressException, since it should not be called for an XASession object.
 Session getSession()
          Gets the session associated with this XASession.
 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, createBrowser, createBrowser, createBytesMessage, createConsumer, createConsumer, createConsumer, createDurableSubscriber, createDurableSubscriber, createMapMessage, createMessage, createObjectMessage, createObjectMessage, createProducer, createQueue, createStreamMessage, createTemporaryQueue, createTemporaryTopic, createTextMessage, createTextMessage, createTopic, getAcknowledgeMode, getMessageListener, recover, run, setMessageListener, unsubscribe
 

Method Detail

getSession

public Session getSession()
                   throws JMSException
Gets the session associated with this XASession.

Returns:
the session object
Throws:
JMSException - if an internal error occurs.
Since:
1.1

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.
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