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The contents of the message header and body are documented here. For information about how to inspect messages coming from Fedora, go here.
Supporting Queues
The default configuration is fine for locally-deployed listeners, but it can be problematic in a distributed context. For instance, if the listener is restarted while a message is sent to the topic, that message may be missed. Furthermore, if there is a networking hiccup between Fedora's local broker and the remote listener, that too can result in lost messages. Instead, in this case, a queue may be better suited.
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