Topics can both export and import messages. Accordingly, you can configure topic definitions (in the configuration file
topics.conf) with
import and
export properties that specify one or more external transports:
(For general information about topics.conf syntax and semantics, see
topics.conf on page 229. You can also configure topics using the administration tool command
addprop topic.)
For example, the following tibemsadmin commands configure the topic
myTopics.news to import and export messages on three transports.
SmartSockets messages with subject /myTopics/news arrive at
tibemsd over the transports SS01 and SS02. EMS clients can receive those messages by subscribing to
myTopics.news.
EMS messages sent to myTopics.news are exported to SmartSockets over all three transports—SS01, SS02 and SS03. SmartSockets clients of the corresponding RTservers can receive those messages by subscribing to
/myTopics/news.
When a topic specifies import on a connected transport, tibemsd imports messages only when the topic has registered subscribers.
Wildcards in the import and
export properties obey EMS syntax and semantics (not SmartSockets syntax and semantics); see
Destination Name—Syntax and Semantics.