[weld-issues] [JBoss JIRA] (WELD-1016) Weld creates multiple interceptor instances per target instance

[Jozef Hartinger (Created) (JIRA)]

Weld creates multiple interceptor instances per target instance
---------------------------------------------------------------

                 Key: WELD-1016
                 URL: https://issues.jboss.org/browse/WELD-1016
             Project: Weld
          Issue Type: Bug
          Components: Interceptors and Decorators
    Affects Versions: 1.1.2.Final
            Reporter: Jozef Hartinger
             Fix For: 1.1.4.Final, 2.0.0.Final


The CDI spec says:
{quote}
An interceptor instance is a dependent object of the object it inter-cepts.
{quote}

The Interceptors spec says:
{quote}
The lifecycle of an interceptor instance is the same as that of the target class instance with which it
is associated. When the target instance is created, a corresponding interceptor instance is created for
each associated interceptor class. These interceptor instances are destroyed when the target instance
is removed.
{quote}

and also

{quote}
An interceptor instance may hold state.
{quote}

It is clear that at most one instance of an interceptor class should be created for an instance of a CDI bean. However, Weld currently creates an instance per method per target instance.

Having a simple intercepted bean:
{code:JAVA}
@ApplicationScoped
@LionBinding
public class Lion
    public Object foo() {
        return null;
    }

    public Object bar() {
        return null;
    }
}
{code}

* multiple invocations of a single method (e.g. foo()) are intercepted by the same interceptor instance
* when invoking different methods on the same bean instance, every method is intercepted by a different interceptor instance - which is wrong

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