Creating a local service in OSB

Question

I want to create several OSB 'local' services. Services that can be called directly without incurring a network hop. Is there a way to do this in OSB (version 10gR3)?

Answer 1

Let's say I want to have a Cache service attached to the ESB. The purpose of the cache is to minimize the number of expensive service calls. In this case I want the Cache deployed to the ESB and accessed locally, meaning I don't want to make a network jump (ala talking to a webservice) to access the cache. I want the access to be local to the ESB.
First of all Cache service services are in general state full. That means that we should be able to store some variable/value across multiple invocations. OSB is primarily designed for the stateless/routing services. There is no out of box variables in OSB that can be maintained across multiple service calls. Not that it cannot be designed inside OSB, but it is ideal to create cache logic out of OSB.
Now to the actual problem, this cache can be designed using java callout . Create some static variable for cache in Singleton Java object. Similarly you can as well design using EJB for this cache logic.
Let me know if this helps
Thanks
Manoj