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<p class=MsoNormal>Hi guys,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Quick one.....I have the following scenario:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:red'>Client sends message -> Mochiweb
HTTP Server -> AMQP Erlang client -> RabbitMQ -> PYTHON consumer<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Obviously the scenario suits ASYNCHRONOUS processing very
well.......but now I want to handle SYNCHRONOUS as well....? <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So what I would like is a SYNCHRONOUS scenario whereby the
message goes from the client -> Mochiweb HTTP server -> then to the AMQP
Erlang client, this then sends the message to RabbitMQ <span style='color:red'>and
blocks for a RESPONSE (waits for return message)</span>.....then the Python
consumer picks up the message....processes it and sends the response to a “RESPONSE
queue”.....the code then receives this response message (via some type of
“<span style='color:red'>correlationID</span>”?) and sends it back
to the calling client.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><u>So basically how are synchronous scenarios handles in
RabbitMQ?</u> Does anyone have any example code in Erlang (or other) that shows
how to process a message with ID “123” in RabbitMQ and put the result
of message “123” into some other response queue..<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Well I suppose when I speak of queues above maybe it should
be “exchange”....maybe with a “routing_key”? The “routing_key”
could be an internal “correlationID” of sorts?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><u>So essentially the process will seem SYNCHRONOUS from
that calling client but will be ASYNCHRONOUS in the “internals”...</u><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any ideas?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks for the help ;-)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Lynton<o:p></o:p></p>
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