BPM 12c Subprocesses (Part 3 of 3): Event Subprocess by Antonis Antoniou


In this third and last part of a three part series on subprocesses we will explore a special type of subprocess referred to as an “Event” subprocess.
This type of subprocess is triggered by an event that can occur anytime during the execution of a process flow that allows you to interrupt the normal flow of an instance.
Such capability can be applicable in various use cases. For example, an error might occur in the process, or you can very well define various service level agreements to delineate execution times or you can even have a business requirement to cancel a flow (for example cancel an order).
You can use the “Event” subprocess to implement such requirements (i.e. handle system and business exceptions).
“Event” subprocesses posses various unique characteristics. One of them is that, by configuration, you can have an “Event” subprocess either as interrupting, that is interrupting the normal process flow execution or have an “Event” subprocess running in parallel (concurrently) to the main flow of your process.
Another really nice and useful characteristics of an “Event” subprocess is that it shares the same context as the main flow of the process, meaning that from the “Event” subprocess you can have access to all the data objects that are used by the main process (and of course update their state).
An “Event” subprocess resembles like an embedded subprocess (except that it’s displayed in a dashed-line boarder), however an “Event” subprocess cannot have outgoing or incoming sequence flows. And just as with the other types of subprocesses an “Event” subprocess can define data objects that are local to its scope.We will implement a very simple process that will make use of the event sub-process to simulate the functional use case depicted by the image above; the scenario is straightforward, you can cancel an order as long as it’s not shipped. 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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