EJB 3.1 remove invocation context for security purpose (ThreadLocal, ...)

I have a webapp on one Glassfish server (front-end) and an EJB 3.1 app (back-end) on another Glassfish server. The weba开发者_C百科pp communicates with the EJB 3.1 via remote invocation.

I would like to pass context data (user data i.e.) without having to define it as an input parameter of each business operation.

I have one idea, but not sure it will work: use a ThreadLocal to store data, but the ThreadLocal will only be available on one server (meaning JVM) => use the InvocationContext object and create interceptor to add user data to the ContextData Map.

What do you think about it? Any other ideas are more than welcome! ;-)

UPDATE

After first answer, I googled it a little bit and found the annotation @CallerPrincipal.

How can I set this object before the remote invocation?

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The container will already handle this so you don't have to code it yourself.

In your EJB, you can access the EJBContext, which has a getCallerPrincipal() method which will give you the callers identity.