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Posted to dev@qpid.apache.org by "Cliff Jansen (JIRA)" <ji...@apache.org> on 2011/03/18 02:34:29 UTC
[jira] Assigned: (QPID-2560) WCF to WCF PubSub sample is mis-named
or needs to be re-designed
[ https://issues.apache.org/jira/browse/QPID-2560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Cliff Jansen reassigned QPID-2560:
----------------------------------
Assignee: Cliff Jansen
> WCF to WCF PubSub sample is mis-named or needs to be re-designed
> ----------------------------------------------------------------
>
> Key: QPID-2560
> URL: https://issues.apache.org/jira/browse/QPID-2560
> Project: Qpid
> Issue Type: Bug
> Components: WCF/C++ Client
> Affects Versions: 0.9
> Environment: Windows WCF
> Reporter: Ted Ross
> Assignee: Cliff Jansen
>
> 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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