Dispatch RPC over The Big Red's Advanced Queue (DBMS_AQ).
You give the request type (needs a Name and a Payload), and the response type (needs an Errmsg and a Payload) to New, and Dispatcher receives the messages, and calls the given do function for each messages.
The output of that function is sent back as answer.
This is a dispatcher, which splits input over the NAME of the task, and manages separate disk queues for each NAME.