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How does a message selector work?

April 26, 2017message Selector

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How does a message selector work?

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Location: http://www.jguru.com/faq/view.jsp?EID=1159 Created: Nov 19, 1999 Author: Jerry Smith (http://www.jguru.com/guru/viewbio.jsp?EID=9) As a JMS server receives messages from producing clients and evaluates which consuming client(s) it should forward each message to, the server applies a consumer’s selector to data in the message header. Messages that do not meet the selection criteria are not delivered to the consumer. A message selector uses SQL92 condition syntax, for example, session.createReceiver(queue, “DogBreed in (‘Newfoundland’, ‘Mastiff’)”); The “data” for selection criteria include certain message header fields, as well as properties attached to messages.