[cdi-dev] cyclic references

[Mark Struberg]

Hi Folks!

I know we already discussed that cyclic references in @PostConstruct and @Inject methods are not allowed (btw, did we also nail this down in the spec properly? This is implicitly defined in commons-annotations).

But what about @PreDestroy? As the destroy order is not defined for normalscoped beans it could happen that a bean already got wiped and destroyed while another one likes to access it. So it's not only a problem of cycles, but might also happen without.

sample:

@RequestScoped

public class BeanA {
  @Inject BeanB b;

  @PreDestroy
  public void destroyMe() {
    b.dosomething();
  }
}

and 


@RequestScoped

public class BeanB {
  public void dosomething() {..}

  @PreDestroy
  public void dropDatabaseConnection() {...}

}

Now lets imagine that BeanB got destroyed earlier than BeanA ....


It's atm purely random. Imo this is ok, but should we point users to this behaviour?

LieGrue,
strub