Durable Subscribers in 12c by Sivakumar
November 9, 2014 Leave a comment
Business Events are used to notify the interested parties (subscribers) about an occurrence of activity which is of important to them. On raising the business events, the subscribers would consume them and process it based on their business flows. All these things would happen in a highly loose coupled manner and business events producers may not be aware of the subscribers. So when designing an application based on business events one of the aspects requires attention is, Will there be any loss of event? 
This is very important as subscribers are not in a position to request providers to raise event again, even if they do its going to be a duplicate event (occurrence) for other subscribers. Technically speaking, the loss of event can be translated into any of these following scenarios:
- Subscriber received the business event but faulted during processing.
- Subscriber is unavailable when the business event is published.
- The hosted server itself is down when the business event is published.
Read the complete article here.
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