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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