Reg: Is it possible in weblogic 5.1 or 6 to get Transaction suport for MQseries & Oracle

Question

          Hi
          I would like to know whether weblogic 5.1 or 6 provides support in a single transaction,
          transaction support for both oracle and MQseires, if so where can i find suitable
          documentation on this topic
          with regards
          Priya
          

Answer 1

The answer is definitely yes, starting in WLS 6.0, with
          some two reasonable limitations.
          There are limitations are the following:
          1. It must be on the server side. The registration of the XAResource
          can't happen in a client. It must happen in a startup class
          or EJB or servlet, etc. You can start it from a client (invoke
          an EJB or servlet) but the resource work must be
          on the server side.
          2. MQSeries can't be included if it is being used to drive a
          Message Driven Bean. Because the message is passed
          from MQ Series to WLS outside of a transaction, after
          which WLS will start a transaction (if so configured) and
          pass it to the MDB, the MQ Series message is not part
          of the transaction. The JavaSoft specs don't handle this case.
          For WLS JMS, this works because we have defined such
          an interface and implemented it. At least one other vendor
          understands the importance of having this feature and is
          interested in implementing it (it's not IBM).
          So to do what you want, it is necessary to:
          1. Use the XAResource version of the JDBC driver for Oracle.
          WLS is smart enough to look at the driver and see if it
          implements the XAResource interface and automatically
          register it as a resource. This has been documented
          in this newsgroup already or see
          http://e-docs/wls/docs60/adminguide/jdbc.html#1075694.
          2. Register the XAResource interface for MQSeries programmatically
          in the application. The code to do this has been posted
          at the BEA developer site for a few months in an article
          entitled "Using JTA Transactions to envelope WLS JMS and
          IBM MQSeries" (could I be more explicit), located at
          http://developer.bea.com/docs/jmsjta.jsp. It references
          another document that has more code, describing how to
          plug in a "foreign" (non-WLS) JMS provider, of which MQSeries
          is one, in a non-transaction manner (you need to do that
          first and then just add the resource registration) - see
          http://developer.bea.com/docs/jmsproviders.jsp.
          All of the necessary code is included in the documents (including
          how to download and install the Java libraries for MQSeries).
          Several people have told me that they have been able to
          use this as a starting place for their applications.
          You might also want to look at the JMS FAQ at
          http://developer.bea.com/docs/jmsfaq.jsp.
          In 6.1, support is added for importing foreign transactions.
          That means that in 6.0, WLS can drive a transaction with
          WLS JMS, Oracle, and MQ series, with WLS being the
          driving force. In WLS 6.1, a non-WLS transaction manager can
          drive a transaction that includes (transactionally infects)
          WLS resources (like WLS JMS).
          There are no white papers that I know of in this area and I haven't
          tested it myself (the goal is to have someone try out
          having WebSphere drive a transaction with WLS resources, soon).
          "Priya" <[email protected]> wrote in message news:[email protected]...
          >
          > Hi
          >
          > I would like to know whether weblogic 5.1 or 6 provides support in a single transaction,
          > transaction support for both oracle and MQseires, if so where can i find suitable
          > documentation on this topic
          >
          > with regards
          > Priya