[cdi-dev] [JBoss JIRA] (CDI-230) Clarify that some Scope constellations for producer fields result in non portable behaviour

[Mark Struberg (JIRA)]

Mark Struberg created CDI-230:
---------------------------------

             Summary: Clarify that some Scope constellations for producer fields result in non portable behaviour
                 Key: CDI-230
                 URL: https://issues.jboss.org/browse/CDI-230
             Project: CDI Specification Issues
          Issue Type: Clarification
          Components: Beans
    Affects Versions: 1.1.EDR1
            Reporter: Mark Struberg
             Fix For: 1.1 (Proposed)


We should add something like the following to the producer-field paragraph:

"When a producer field produces a bean with a 'shorter' Lifecycle than the scope of the class the producer field is defined in, non-portable behaviour results."

An example:

{code}
@ApplicationScoped
public class ContainerBean {

  @Produces @RequestScoped
  Something something = new Something(1, 2, 3);

  void throwAway(@Disposes Something sthg) {
    sthg.destroyMe();
  }
}
{code}

The problem is that each request will take 'something' from the @ApplicationScoped ContainerBean. Thus all requests share the same contextual instance! Afer the first request ends, the disposal method 'throwAway' will destroy the information inside the variable 'something' and leaves it in a broken state for all other requests -> bang...



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