Draft of the Jakarta Enterprise Beans 4.0 plan

[dblevins]

Significant detail on release plan for Jakarta Enterprise Beans 4.0. To be referenced in the Plan Review and specification page.

[tkburroughs]

In addition to the removal of methods relying on java.security.Identity, should we also add:

• Removal of methods relying on JAX-RPC : jakarta.ejb.SessionContext.getMessageContext()
• Removal of deprecated method jakarta.ejb.EJBContext.getEnvironment()

Per the Jakarta EE 9 Release Plan ( https://eclipse-ee4j.github.io/jakartaee-platform/jakartaee9/JakartaEE9ReleasePlan), JAX-RPC will be pruned from Jakarta EE 9, which would mean the return type of getMessageContext() won't exist anymore.

After removing the java.security.Identity methods.... getEnvironment() will be the only remaining deprecated method throughout the EJB APIs. I think it has been deprecated since EJB 1.1. Unlike the other items being removed or made optional, I don't think this method is overly burdensome for a provider to implement... just mentioning it because it has been deprecated for a long time, and this might be the best (only) time to remove it.

[dblevins]

Going to merge and create a separate PR for the JAX-RPC and Environment updates.