JMS Listener Routing Algorithm

Routing algorithm sequence

1. Is there only one service operation in the package?
   
   • Yes -- route the message to the referenced operation.
   • No -- continue evaluation.
2. Is there a custom header property defined for routing?
   
   • Yes -- route the message to the referenced service operation (for example, outq/send).
   • No -- continue evaluation.
3. Is there a jmsaction property defined that points to a specific service operation?
   
   • Yes -- route the message to the referenced service operation.
   • No -- continue evaluation.
4. Do the JMS header properties indicate that there is there a custom wire format message defined?
   Note: Custom wire format is only used for routing purposes if steps 1-3 of the JMS listener routing algorithm do not resolve.
   
   
   • Yes -- try to route the message by the message definition. The JMS listener looks for a service operation that takes one of the supported format protocols as an input parameter (for example, SimpleMessage).
   • No -- continue evaluation.

5. Is the message an XML message?

   
   
   • Yes -- use an XML parser to parse the message and look for service operation(s) in the package that are expecting a message with the same root element as the message. Then, route the message to the referenced service operation(s).
   • No -- direct the message to the fail queue.