Define listener port — listener ports are used to associate the JMS resources and deployed message-driven beans with the listener service that is handling the incoming messages.
定义监听端口——监听端口是用于连接jms资源及部署的消息驱动bean和用来处理传入消息的监听服务。
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Message handlers provide additional message-handling facilities to web service endpoints (both client and server) as extensions to the basic service implementation logic.