In the ejb-jar.xml file, define the transaction type as Container and the trans-attribute as Required, as in the following example:

<ejb-jar>

<enterprise-beans>

<message-driven>

<ejb-name>MDB</ejb-name>

<ejb-class>MDB</ejb-class>

<transaction-type>Container</transaction-type>

<message-driven-destination>

<destination-type>javax.jms.Queue</destination-type>

</message-driven-destination>

</message-driven>

</enterprise-beans>

<assembly-descriptor>

<container-transaction>

<method>

<ejb-name>MDB</ejb-name>

<method-name>*</method-name>

</method>

<trans-attribute>

Required

</trans-attribute>

</container-transaction>

</assembly-descriptor>

</ejb-jar>

To rollback a transaction, you can either use the WebLogic extension TXHelper or you can use the MDB context as in the following code examples:

UserTransaction ut =

weblogic.transaction.TXHelper.getUserTransaction();

ut.setRollbackOnly();

or

private MessageDrivenContext context;

public void setMessageDrivenContext(

MessageDrivenContext mycontext) {

context = mycontext;

}

public void onMessage(Message msg) {

try { // some logic

}

catch(Exception e) {

System.out.println("MDB doing rollback");

context.setRollbackOnly();

}