Route messages to different message queues in IBM MQ based on MQRFH2 and USR properties

Would appreciate if anyone is able to assist/provide some sort of a guide/tutorial for using IBM IIB (Integrated Toolkit) and IBM MQ, making use of MQ Input Node, Compute Node and MQ Output Node, such that when a message is put on the input queue, it will be routed to an output queue based on the MQRFH2 headers and USR properties set/defined in the compute node (ESQL file)

E.g. If MQRFH2/USR = 1, route message to Queue 1, IF MQRFH2/USR = 2, route message to Queue 2, etc.

Thanks in advance.

Please read Accessing the MQRFH2 header and Populating Destination in the local environment tree.

Then you could write your ESQL like this: (assuming the RFH2 routing variable is named Ker)

CREATE COMPUTE MODULE Routing_Compute
    CREATE FUNCTION Main() RETURNS BOOLEAN
    BEGIN
        SET OutputLocalEnvironment.Destination.MQ.DestinationData[1].queueName =
            CASE InputRoot.MQRFH2.usr.Ker
                WHEN '1' THEN 'Q1'
                WHEN '2' THEN 'Q2'
                ELSE 'Q3'
            END;
        RETURN TRUE;
    END;
END MODULE;

Remember to change the default node configuration like this:

• Compute: Set Compute mode to LocalEnvironment
• MQ Ouput: Set Destination mode to Destination List

Example: If input message header Ker has value 2, then it will be routed to queue Q2.