Request/Reply Message Matching using headers

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Request/Reply Message Matching using headers

[drewvella-dpg]

Ok I think I understood what needs to be done! Cheers!

[ehmkah]

I made a MR with an example how you could do it. I hope it will be merged and more important helps :-)

[drewvella-dpg]

Thanks for that! Can you elaborate a bit to make sure I understood correctly?

  // method is called:
    // - for each message which will be sent out
    // - for each message which has been received

Would I need to code the logic to extract the value from the headers and return that value for it to match or also code the part to teach it how to match? ie:

Scenario 1:
Request sent on queue 1 - Matcher kicks in and extracts value from header
Response comes in on queue 2 - Matcher kicks in and extracts value from header plugin automatically matches

Scenario 2:
Request sent on queue 1 - Matcher kicks in and extracts value from header and store the value to correlate it later
Response comes in on queue 2 - Matcher kicks in and extracts value from header custom logic to correlate with list

[ehmkah]

In my opinion scenario 1 is correct. Your method calculates the values from messages and the plugin does the rest. You do not have to store the values somewhere.

Attention: If for some reason the method returns the same ID for two different sent-messages and gatling is waiting for the response of those two messages it happens that one message-mapping is not detected. (To see it return always "1" - its diffuclt to explain)

Maybe a small testsetup which starts a rabbitmq container and runs out of the box would be a good benefit.