SOA Suite 12.2.1: A first look at end-to-end JSON and JavaScript support in SOA Composites by Maarten Smeets

 

clip_image002SOA Suite 12.2.1 introduces end-to-end JSON support in composites and support for JavaScript in composites. The REST-binding (which can be used by Service Bus, BPEL, BPM) can receive and send untyped JSON without the need to translate it to XML. In BPEL, JavaScript can be used as expression language in various activities and there is a JavaScript embedding activity available.

In this article I’ll show some examples on what you can do with this end-to-end JSON support and give some examples on how to use JavaScript in your BPEL process.

About the implementation

Oracle has used the Mozilla Rhino JavaScript engine which is embedded in Java SE 6 and 7. WebLogic Server 12.2.1 and thus also SOA Suite 12.2.1, runs on Java SE 8 (Java EE 7). Java SE 8 has a new JavaScript engine Nashorn embedded (see here). A possible reason of Oracle for choosing Rhino could be that Nashorn is not thread safe. See here. You can imagine you need thread safety in an environment like SOA Suite.

SOAIncomingRequests_maxThreads is a property indicating the number of threads available to handle incoming requests. It is by default set to the same value as the connection pool size of the SOADataSource. This might not be enough for REST/JSON services. You can find this setting by going to the MBean browser, Configuration MBeans, com.bea, SelfTuning, (domain), MaxThreadsConstraint.

Use untyped JSON

You can use untyped JSON in various BPEL activities such as assign and assert activities. Since the JSON is untyped, you can assign values to elements which do not exist yet and they will be created; there is no message definition. Payload validation will cause a NullPointerException. Read the complete article here.

SOA & BPM Partner Community

For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center.

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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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