结果将以消息通知的形式发送给每个观测者，告知他们这个主题已经变化。
This results in a notification message being sent to each observer, informing them that the subject has changed.
如果匹配不成功，它也会发出一个通知，告知请求中的主题为未知的主题。
If the match is unsuccessful, it issues a notification that the topic in the request is unknown.
为此，必须告知esb主题的名称和连接属性，而且必须在将导入绑定定义为JMS消息传递时提供此信息。
To do this, the ESB must be instrumented as far as the topic's name and connection properties, and this information must be provided when defining the import binding as JMS messaging.
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