Use of Qi4j.dereference(T compositeOrUow)

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Tasos Parisinos

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Apr 1, 2015, 3:56:29 PM4/1/15

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Hello all

We have implemented an application with a DCI design. There we have a Use Case (Context), with a single actor, a TransientComposite with several fragments, each with its own mixin implementation. Some of these fragments need to access the state of the composite type and even modify it. To achieve this we use the following injection in the abstract class mixin implementations:

@This

protected ActorComposite self;

This works out fine (at least so it seems) without the need to dereference. Can anyone shed some more light to the use of this API call?

Thanx in advance

Niclas Hedhman

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Apr 2, 2015, 4:07:07 AM4/2/15

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Do you mean the dereference() method in the Qi4j API ??

That is only needed for Concerns and SideEffects when they need to hand over a "self" to something external. I don't remember off-hand why it was only needed in Concerns and SideEffects, and not Mixins. I think it was related to the way that the stateless part of the invocation stack is linked together. If you need to know, I will dig it up...

Niclas

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