injection into stateless bean (which is called from an MDB)

[codelion]

Wrote a MDB months ago, used @PersistenceContext and @EJB to inject. Inside the MDB via one of those @EJB got a stateless bean and called a method in it (to do the actual task). That stateless bean also used @PersistenceContext, @Resource and @EJB.

Then I wanted to make better use of Seam, so I started using @In in the stateless bean instead of @EJB.

Now when executing I get NPE because these @In fields have nothing in them. The NPE occurs where the field is used because it is null, NOT earlier. I did NOT make required=false.

Is there an obvious problem?

Ref doc 3.2.5. Message-driven beans reads "Message-driven beans may not be bound to a Seam context. Nor do they have access to the session or conversation state of their caller. However, they do support bijection and some other Seam functionality."

So what can I inject then?

One of my null @In fields was supposed to get a proven stateless bean of mine which has a @Name, the other a ManagedQueueSender Seam component.

[pmuir]

Please post some code, your description is hard to follow.

[gavin.king]

Correct, @In works in an MDB.

[gavin.king]

(As long as the MDB has an @Name annotation, and is in an EAR with a Seam WAR, of course.)

[codelion]

Gavin rules!

Indeed, my MDB didn't have a @Name.

[codelion]

Trying to understand my car's engine.

What was the reason for null:

A) Because it wasn't a Seam component (lacking @Name) the @In annotation didn't even get intercepted.

B) Because it wasn't a Seam component (lacking @Name) there wasn't a context to look up anything (even though an interceptor for tried to honor the @In)?

[gavin.king]

A.

[gavin.king]

Hum, and B.