When to use Apps adapter and DB adapter?

Hi All,
For invoking a PL/SQL API(either a custom or System API) in Oracle Applications from BPEL Process which is better to use?When to use Apps adapter and DB adapter?
Thanks,
ChitraDevi

As Sen correctly states for the DB adapter you have to set the context manually using the fun_global.apps_initilize or Fnd_Client_Info.SET_ORG_CONTEXT. This is usually done in a wrapper procedure.
I wouldn't say I'm an expert in this field as I have only used the APPS adapter for 11.5.10. I believe things have changed a bit for R12, but from my experience with APPS, things change very slow so although R12 is 10g App Server I'm sure the principles are the same.
Sen is also correct saying that base tables are not accessible via the APPS adapter. Basically the apps adapter is there to expose services, base tables are not services.
My recommendation would be different based on the experience of the developer(s). The APPS adapter simplifies the development but may not have the flexibility. The apps adapters sweet spot is those services that are difficult to integrate with, e.g. business services, xml gateway. If these are used heavily I would use the APPS adapter.
What I personally do, even if I'm not using APPS, if I'm connecting to the database I will implement a function, stored procedure, or AQ. It is a little more hassle during deployment, but it treats it more like a service and you are not impacted if the tables change. This is not an endorsement for you to go down this path because it does have a requirement to have PL/SQL knowledge, and it breaks the notion of service abstraction from the DB.
cheers
James

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