What type of queue (e.g. FIFO, concurrent/parallel, priority) does Fusion Public Business Event use?
Context
I am working on a client project that is leveraging the Oracle Fusion Business Events that are subscribed to by the OIC Fusion ERP adapter. We are leveraging a number of different events across various objects including but not limited to - Items, Purchase Orders, Projects.
Our solution is undergoing some architectural reviews and one of the questions that was raised is regarding the implementation of the underlying queue that is pushing the Public Business Events to OIC.
Questions I'm looking to answer - How does this queue behave when it comes to processing the events sequence? Does it process the first event it receives (FIFO)? Does/can it process requests in parallel (concurrent queue)? Is there are priority assignment to events that would lead to resequencing of the order in which they are published?