Jacobo Matute from TheServerLabs wrote a very good tutorial on its blog about developping a SCA based application using JBI and especially using PEtALS SCA features. You can find the article here.
This news has not been published on the PEtALS Web Site (why?) but yes we now have some SCA (Service Component Architecture) tools available with PEtALS ESB!
This work is a result of the ScorWare project in which eBM WebSourcing was involved in.
The SCA feature is provided in PEtALS by the SCA JBI Service Engine (link to the component and link to the documentation)
The main advantage of SCA over other approaches, like BPEL or EIP, is that you can define the composition with Java instead of XML. The SCA composite defines services, which are exposed in the bus. It also defines references, which point to services that might be called or used by the composite at runtime. These references define possible dependencies. And eventually, your composite embeds a Java implementation which allows you to manipulate the references as simple Java objects. This makes the user job easier, in particular to call a service operation or test conditions on a service call result.
For more details on SCA, on tools and more, take a look at the links below :
