IBM WebSphere MQ Client - unlimited wait GET vs. correlation GET

Question

I am trying to build with amqmdnet a IBM MQ receiver with 2 functionalities:

• ReceiveReply(byte correlationId) – reads REPLY messages for supplied correlation identifiers. Is implemented by a GET with a correlation MATCH.
• event EventHandler NewMessage – notifies the subscriber of new REQUEST messages. Is implemented by a GET with unlimited wait in infinite while loop.

The problem is that I cannot limit the second GET to read only REQUEST messages and so the correlation GET is never successful. If I only do one GET I will have to implement correlation on my own.

Anyone tried to implement something similar?

Thanks, Radu

Answer 1

The simplest option is to use two queues. There are ugly ways of achieving what you are after (imagine all request messages putting something in the correlid so you could get by correlid there too, for example) but in principle you have a request queue and a reply queue - dont share!