[weld-issues] [JBoss JIRA] Created: (WELD-734) Support @EJB injection in pre-Java EE 6 environments

[Dan Allen (JIRA)]

Support @EJB injection in pre-Java EE 6 environments
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                 Key: WELD-734
                 URL: https://jira.jboss.org/browse/WELD-734
             Project: Weld
          Issue Type: Feature Request
          Components: Servlet Container Support
    Affects Versions: 1.1.0.Beta1
            Reporter: Dan Allen
            Priority: Minor


Add support for the injection of EJBs into CDI beans (via the @EJB annotation) in Weld Servlet for use in pre-Java EE 6 environments. This feature would enable more developers to immeidately switch to CDI despite having to use an older platform.

The best strategy to take to implement this feature would be to leverage Weld's EjbServices SPI interface (http://docs.jboss.org/weld/reference/latest/en-US/html/ri-spi.html) on a per container basis (in the same way Weld is integrated into the Java EE 6 containers).

Currently, the Weld Listener doesn't provide any hooks to register services before it starts the container. We could redesign the Listener to support providing the EjbServices implementation (and perhaps other service implementations) in a listener subclass.

It's unlikely we can fully implement EJB integration in pre EE6 environments as (at least in JBoss AS and GlassFish) as some of the hooks (specifically the hooks to remove EJBs on demand) are missing. However, basic injection would cover ~80% of the cases.

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