Oracle Service Bus: transport thread blocking evidences by Fabio Mazanatti


The common case scenario for a service exposed via Oracle Service Bus is to receive a message, validate/enrich/transform it, call a service provider and then do some additional work with the response from the provider before returning it to the caller. The initial steps are grouped inside a request pipeline; the message then goes through a route to the provider, and the final processing is done by a response pipeline before sending it back to the caller:

Usual structure of an OSB service

The threading model used by Oracle Service Bus states that the request pipeline must execute on a thread (the Inbound Request Message Thread) and the response pipeline must use another thread to process the response (properly named the Outbound Response Message Thread). The route is done by a transport provider, which can or cannot use the request thread to wait for the provider’s response.

When the transport holds the request thread until it gets a response, it is called a blocking transport. Conversely, if the transport puts the call and releases the thread, it’s called a non-blocking transport. Some of the transports are listed below, with info about their support to non-blocking calls: Read the complete article here.

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Technorati Tags: SOA Community,Oracle SOA,Oracle BPM,OPN,Jürgen Kress

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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