Selectors for Routing Topic Messages

A server forwards a global topic message along routes to all servers with subscribers for that topic. When each of those other servers requires only a small subset of the messages, this policy could potentially result in a high volume of unwanted network traffic.

You can specify message selectors on routes to narrow the subset of topic messages that traverse each route.

Note: Message selectors on routes are different from message selectors on individual subscribers, which narrow the subset of messages that the server delivers to the subscriber client.