Oracle SOA fault handling with ordered guaranteed delivery using BPEL, JMSAdapter, custom JMS headers, JMS message selectors, a JMS topic and durable subscribers

In this blog post I will demonstrate an error handling mechanism which can be used to achieve guaranteed delivery of messages in a specific order. To implement this I have used Oracle SOA Suite 11g, BPEL 2.0. The method described however can also be implemented by other technologies/languages. The method used is different from (as far as I know) previously described methods to implement exception handling in Oracle SOA Suite. A single JMS topic is used and JMS message selectors based on custom JMS headers are used by clients. By using a JMS topic, the services are loosely coupled. This method also allows tracing of flows over the topic in the Enterprise Manager Fusion Middleware Control (when Oracle SOA Suite is used). A screenshot of this mechanism implemented is shown in the screenshot below. It will be explained in more detail below.