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14.4. Configuring JMS Transactions
Overview
CXF 3.0 supports both local JMS transactions and JTA transactions on CXF endpoints, when using one-way messaging.
Local transactions
Transactions using local resources roll back the JMS message only when an exception occurs. They do not directly coordinate other resources, such as database transactions.
To set up a local transaction, configure the endpoint as you normally would, and set the property sessionTrasnsacted to
true.
Note
For more information on transactions and pooling, see the Red Hat JBoss Fuse Transaction Guide.
JTA transactions
Using JTA transactions, you can coordinate any number of XA resources. If a CXF endpoint is configured for JTA transactions, it starts a transaction before calling the service implementation. The transaction will be committed if no exception occurs. Otherwise, it will be rolled back.
In JTA transactions, a JMS message is consumed and the data written to a database. When an exception occurs, both resources are rolled back, so either the message is consumed and the data is written to the database, or the message is rolled back and the data is not written to the database.
Configuring JTA transactions requires two steps:
- Defining a transaction manager
- bean method
- Define a transaction manager
<bean id="transactionManager" class="org.apache.geronimo.transaction.manager.GeronimoTransactionManager"/>
- Set the name of the transaction manager in the JMS URI
jms:queue:myqueue?jndiTransactionManager=TransactionManager
This example finds a bean with the IDTransactionManager.
- OSGi reference method
- Look up the transaction manager as an OSGi service using Blueprint
<reference id="TransactionManager" interface="javax.transaction.TransactionManager"/>
- Set the name of the transaction manager in the JMS URI
jms:jndi:myqueue?jndiTransactionManager=java:comp/env/TransactionManager
This example looks up the transaction manager in JNDI.
- Configuring a JCA pooled connection factoryUsing Spring to define the JCA pooled connection factory:
<bean id="xacf" class="org.apache.activemq.ActiveMQXAConnectionFactory"> <property name="brokerURL" value="tcp://localhost:61616" /> </bean> <bean id="ConnectionFactory" class="org.apache.activemq.jms.pool.JcaPooledConnectionFactory"> <property name="transactionManager" ref="transactionManager" /> <property name="connectionFactory" ref="xacf" /> </bean>
In this example, the first bean defines an ActiveMQ XA connection factory, which is given to aJcaPooledConnectionFactory. TheJcaPooledConnectionFactoryis then provided as the default bean with idConnectionFactory.Note that theJcaPooledConnectionFactorylooks like a normal ConnectionFactory. But when a new connection and session are opened, it checks for an XA transaction and, if found, automatically registers the JMS session as an XA resource. This allows the JMS session to participate in the JMS transaction.ImportantDirectly setting an XA ConnectionFactory on the JMS transport will not work!
