WCF to WCF PubSub sample is mis-named or needs to be re-designed
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Key: QPID-2560
URL: https://issues.apache.org/jira/browse/QPID-2560
Project: Qpid
Issue Type: Bug
Components: WCF/C++ Client
Affects Versions: 0.7
Environment: Windows WCF
Reporter: Ted Ross
The WCF sample called "WCFToWCFPubSub" does not use actual AMQP topic routing
and therefore is not an accurate illustration of the publication-subscription
pattern.
The environment in which this was tested was: Two instances of Topic_Consumer
and a single instance of Topic_Producer running. The producer sends ten
messages and the two consumers receive a subset (partition of the set) of the
messages. This is actually using a shared queue and balancing the traffic
between the two consumers, not broadcasting the messages equally to the two
consumers as it should.
Another, more fundamental, problem is that the message transfer is layered on
top of a remote procedure call handled by a service associated with the
consumer. This is why this code example balances the sent messages. It is
only possible for an RPC to be handled by a single server.
RPC is not appropriate for pub-sub since the producer doesn't know, when it
produces, how many consumers, if any, there are for each produced message.
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