BPM 12c Gateways (Part 3 of 5): Parallel Gateway by Antonis Antoniou


clip_image002The parallel gateway enables you to perform multiple tasks simultaneously, allowing your process to follow several unconditional paths in parallel. When your process token reaches a parallel gateway activity, the parallel gateway will create a token for each outgoing parallel sequence flow. Your process will wait until all tokens have arrived at the parallel gateway merge activity before resuming with the rest of the activities.
You should be very careful with the parallel gateway activity because if one of the tokens that have been created by the parallel gateway doesn’t arrive at the parallel gateway merge activity, then your process will freeze.
So let’s see how you can use the parallel gateway in a process. Let’s assume that you are implementing an order process and that at some point in your process you want to request for quotations from two different suppliers. Once you have received both quotations your process should resume (ideally pick the lowest quotation but I will not be implementing this part).
I created a BPM application with a default BPM project (named both application and project "ParallelGatewayDemo") having an empty composite. 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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