Recovering an Asynchronous Callback in Oracle BPMN by Mark Petersen

imageWhen creating asynchronous services, you don’t normally worry about what happens if the service fails to callback to the parent process.  However, if the callback does fails, it can create major problems for the parent process, making it stall without an easy way to recover. 

Take, for example, the following process, called SubmitCreditCheck. The asynchronous Call: Perform Credit Check service blocks until the Receive: Perform Credit Check callback message is received. If, for whatever reason, this service doesn’t return, the main process will be stuck and will not make to the Start: Report Write-up service; and it will never end.

With a little bit of planning, however, you can implement a mechanism to recover from this problem and resume the process. This mechanism only requires the addition of a correlation ID at the start of the process and in the callback activity. Refer to Oracle documentation on correlation here.

Now if the service doesn’t return a callback message, you can manually trigger the callback using the callback URL defined below. Read the complete article here.

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About Jürgen Kress
As a middleware expert Jürgen works at Oracle EMEA Alliances and Channels, responsible for Oracle’s EMEA Fusion Middleware partner business. He is the founder of the Oracle SOA & BPM and the WebLogic Partner Communities and the global Oracle Partner Advisory Councils. With more than 5000 members from all over the world the Middleware Partner Community is the most successful and active community at Oracle. Jürgen manages the community with monthly newsletters, webcasts and conferences. He hosts his annual Fusion Middleware Partner Community Forums and the Fusion Middleware Summer Camps, where more than 200 partners get product updates, roadmap insights and hands-on trainings. Supplemented by many web 2.0 tools like twitter, discussion forums, online communities, blogs and wikis. For the SOA & Cloud Symposium by Thomas Erl, Jürgen is a member of the steering board. He is also a frequent speaker at conferences like the SOA & BPM Integration Days, JAX, UKOUG, OUGN, or OOP.

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