Hi, It is possible to be both a publisher and subscriber on the same topic. If you are trying to apply a request/response based communication model in a pub/sub or queueing environment, then you need to use Correlation Id's to match the responses to a given request. More importantly, you need to use a response queue or topic to ensure the response is sent and received by the right entity (client).
However the bigger point is, pub/sub is not generally used for request/response scenarios. Queues are more preferable since pub/sub involves dispatch of a single message to several subscribers each of whom may independently act on the message oblivious to the activities of other subscribers causing unnecessary duplication of message handling. Also responses will be dispatched to all subscribers unless you use response topics and control the clients subscribing to the response topic, causing flooding in the environment. This is bad for scalability and seriously damage performance. Hope this helps. Cheers, Ashwin... ----- --------------------------------------------------------- Ashwin Karpe Apache Camel Committer & Sr Principal Consultant Progress Software Corporation http://fusesource.com http://fusesource.com Blog: http://opensourceknowledge.blogspot.com.com http://opensourceknowedge.blogspot.com --------------------------------------------------------- -- View this message in context: http://camel.465427.n5.nabble.com/PubSub-with-multiple-responses-tp2806150p2806172.html Sent from the Camel - Users mailing list archive at Nabble.com.
