[jboss-dev-forums] [EJB3 Development] - Re: Distributed transaction

[Michael Musgrove]

Michael Musgrove [http://community.jboss.org/people/mmusgrov] created the discussion

"Re: Distributed transaction"

To view the discussion, visit: http://community.jboss.org/message/642280#642280

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I don't have a ready made example but to get you started you will need something along the following lines:

        <persistence-unit name="pctx1">
                <jta-data-source>java:jboss/datasources/ExampleDS</jta-data-source>
                <properties>
                  <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver" />
                  <property name="hibernate.connection.url" value="jdbc:h2:mem:test1" />
                  <property name="hibernate.connection.username" value="sa" />
                  <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
                  <property name="hibernate.hbm2ddl.auto" value="create" />
                  ....
                </properties>
        </persistence-unit>
        <persistence-unit name="pctx2">
                <jta-data-source>java:jboss/datasources/ExampleDS2</jta-data-source>
                <properties>
                ... etc

in your persistence.xml where you have configured java:jboss/datasources/ExampleDS and java:jboss/datasources/ExampleDS2 as xa datasources in your XML config

followed by 

public class XAService {
   @PersistenceContext(unitName = "pctx1")
   EntityManager em1;
   @PersistenceContext(unitName = "pctx2")
   EntityManager em2;

   public void doXA() {
      UserTransaction ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");
      ut.begin();
      em1.persist(new Entity1("E1"));
      em2.persist(new Entity2("E2"));
      ut.commit();
   }
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