0000952: @EJB injection and inheritance

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Category

Severity

Reproducibility

Date Submitted

Last Update

0000952

[Resin]

minor

always

02-20-06 08:51

03-27-06 14:53

Reporter

anonymous

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Status

closed

Product Version

3.0.16

Summary

0000952: @EJB injection and inheritance

Description

The @EJB injection code is not handling annotations specified in a base class.

I have a little code I have been playing with where I have a series of servlets derived from a custom base class. The base class contains a reference to an EJB that all of my servlets need. I tried to configure this by adding an @EJB method in the base class but the injection never happens.

I found two workarounds for now:
- Do the injection from each derived class. Then things work correctly, but I end up with a lot of duplicate code.
- Manually do the lookup in init() of the base class.

Additional Information

Example:

public class BaseServlet extends ...
{
   protected MyEJB ejb = null;

   ...

   @EJB
   public void setMyEJB(MyEJB ejb) ...
}

public class ConcreteServlet extends BaseServlet
{
   ...

   public void service(...)
   {
        this.ejb.method(); // NPE here - injection is not being done
   }
   ...
}

WORKAROUND: Do the injection from the concrete class rather than the base class

public class ConcreteServlet extends BaseServlet
{
   ...
   @EJB
   public void setMyEJB(MyEJB ejb) { ... }
   ...

   public void service(...)
   {
        this.ejb.method(); // Works fine now...
   }

}

Attached Files

Relationships

Notes
(0000952) ferg 03-27-06 14:53	ejb/0f24

Issue History
Date Modified	Username	Field	Change
02-20-06 08:51	anonymous	New Issue
03-27-06 14:53	ferg	Note Added: 0000952
03-27-06 14:53	ferg	Assigned To	=> ferg
03-27-06 14:53	ferg	Status	new => closed
03-27-06 14:53	ferg	Resolution	open => fixed
03-27-06 14:53	ferg	Fixed in Version	=> 3.0.19

Mantis 1.0.0rc3[^]

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