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Oracle Service Bus 11g Development Cookbook by Eric Elzinga, Mischa Kölliker, Jan van Zoggel, Edwin Biemond, Guido Schmutz

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Exposing an EJB session bean as an EJB on the OSB using the JEJB transport

The JEJB transport allows passing POJOs through the OSB. We can use the JEJB transport on proxy service and expose the proxy service as a remote EJB. For the consumer/client, the proxy service looks like a normal stateless session bean. This will add an additional layer between the client and some existing EJB session beans, which provides additional functionality and agility, such as:

  • Replacing the original EJB by something else, that still provides the same interface to the existing clients
  • Doing some transformations between the EJB client and the EJB session bean implementation
  • Implementing logging
  • Using the capabilities of OSB to monitor SLA's

In this recipe, we will implement ...

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