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Response models
The synchronous request and response model is associated with IMS™.
- Synchronous request and response
- In the synchronous request and response model, the entire transmission
is returned to the IMS node synchronously.
After the IMS program has prepared the response data for the WebSphere® Message Broker message flow, it inserts that data onto a queue. WebSphere Message Broker uses Open Transaction Manager Access (OTMA) to communicate with the IMS program. OTMA helps to correlate the input to the IMS program with the output from the IMS program by using a transaction pipe (TPIPE). Therefore, multiple concurrent message flows that are calling the same transaction each receive the relevant response.
The TPIPE is created automatically. It is not necessary for the name of the TPIPE to be known to WebSphere Message Broker because it uses a mode of operation known as sharable persistent sockets, whereby a TPIPE is created automatically for every TCP/IP connection.