Relationship of SCA and JBI

There is an interesting white paper at the OSOA web site entitled "Relationship of SCA and JBI". Given the confusion about this subject in the recent past (which I have commented on), I'm glad to see something that is more informative on this subject, published by the Open SOA collaboration, which includes Sun, IBM, Oracle, SAP, BEA, and others. (Check out the Open SOA site for details.

Some interesting bits:

"Both SCA and JBI are focused on helping developers construct and compose services so it is natural to assume that they are competitors; however, this is not the case. While both can be used separately, they are also effective to use together because they focus on different aspects of the larger service composition problem.

"The reason this is possible is that SCA and JBI target different audiences. The SCA specifications target end users. They describe how to implement, assemble and deploy applications composed from services. As such, the target audience for these specifications is people working in the roles of developer, assembler and deployer respectively."

That pretty well summarizes the situation, as it exists with JBI 1.0. One of the possible outcomes of JSR 312 (JBI 2.0) is an improvement in the alignment between the two technologies. Such an improvement would allow the technologies not only to co-exist (as is the case today), but also would eliminate what small "impedance mismatches" exist in the areas of deployment and metadata.

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