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Three tutorials that demonstrate the capabilities of Oracle Service Bus, in particular the functionality that isn't included in Oracle ESB:

• Exposing a simple service: getting to know OSB basics such as Business and Proxy Services, and simple routing rules and transformation capabilities based on XQuery.
• New adapters: getting to know the adapter support in OSB such as the e-mail adapter.
• Data enrichment: more advanced routing and transformation capabilities of OSB.
  

Data conversion between an EJB and OSB is done for you in OSB. However, when dealing with EJBs there are times when automatic conversion is simply not possible. For example, if the EJB returns any of the following, the JAX RPC engine will not be able to infer the true type being returned:

• java.lang.Object
• java.lang.Object[]
• Java Collections that are not strongly typed
• Java classes that do not follow JavaBean conventions (like the Map class)

The OSB converter class is designed to help you deal with just such return values from an EJB.