Support the use of Future from ExecutorService in InstanceProducer

Open InstanceProducer with a option to set(Future<T>).

@Inject
Instance<T> inst; inst.get() would call future.get();

Would allow for background creation of any exposed contextual object.

@Inject @TestScoped
private InstanceProducer<T> producer;

@Inject
private Instance<ExecutorService> executor;


producer.set(executor.submit(Callable<T>))

Questions:

When is fire(T) called, when set(Future<T>) as now, or when Future is resovled?