As we have covered the standard JBI packaging and deployment model in Chapter
6, we now have enough toolsets to delve deep into JBI and ESB. We will continue
our journey by looking at using Spring beans to Spring-wrap an EJB service onto the
JBI bus in the next chapter. By doing so, we will expose EJB as a WSDL compliant
service across firewalls??”yes really, we are going to do that! Hence, don't scrap your
existing investments in EJB till you cover the next chapter.
Binding EJB in a JBI Container
EJB is the distributed component paradigm in the Java-J2EE world. EJB proved not
to be a push button solution for programming problems. Still, a few of the promises
(of course, reality too)??”distributed transaction propagation, component-based
deployment model, and interface-based design, proved to be really useful. Today,
we have been talking about lightweight containers and aspect-based programming,
and whether EJB still holds the crown is something which has to be answered on
a case by case basis. Being neither a proponent nor an opponent of EJB, one thing I
have to admit is that the industry has a lot invested in this technology.
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