Introduction

With the release 11g of the Oracle Service Bus there are two transports for directly communicating to an EJB session bean layer, the EJB, and the JEJB transport. The first was already available in previous versions of OSB whereas the latter, the JEBJ transport, has been introduced with 11g.

The EJB transport is only available for business services whereas the JEJB transport can be used both on a proxy service as well as for business services.

• The EJB transport uses the Java Web Services ( JWS) framework to invoke remote EJBs

• The JEJB transport uses an RMI serialization/deserialization cycle and passes Plain Old Java Objects (POJOs) directly through the OSB to the remote EJBs.

The EJB and JEJB business services both call the session beans, but there is an important difference between these two transports. With the JEJB transport the request and response remain Java object (POJO) and will not be transformed to XML. This is great for performance but it means you cannot change the...