Do you ever run two tasks simultaneously? If not, perhaps you can create a
special provider that you can swap out the Caller where you're currently
considering creating a new injector.
import com.google.inject.Provider;
import java.util.concurrent.atomic.AtomicReference;
public class CallerProvider implements Provider<Caller> {
private AtomicReference<Caller> caller;
public void set(Caller currentCaller) {
caller.set(currentCaller);
}
@Override
public Caller get() {
return caller.get();
}
}
Inject Provider<Caller> anywhere you need to know who the caller is (when
logging, etc) and call .get() to get the current caller. Consider using a
Provider<Optional<Caller>> or at least be careful of null pointer
exceptions when Caller is not set.
Does this help you get to a solution? Are there other things you were
hoping to replace by creating a new injector that doesn't fit into this
pattern?
On Sun, Oct 19, 2014 at 11:54 AM, Kevin Burton <burtona...@gmail.com> wrote:
> I'm aware that it's probably that I might need to refactor some things ...
>
> However, I'm not sure the ideal way to have certain bindings, without
> replacing them.
>
> I have one binding, Caller, which is literally just a string explaining
> what root service called an object.
>
> This way I can trace things like how an HTTP request originated.
>
> By default, it's unknown... because any library should be able to perform
> an HTTP request if necessary.
>
> However, I need to swap in a new one as I'm starting up certain tasks.
>
> So if I have a Foo and a Bar task each should have its own Caller.
>
> And yes, you might be right... I may need to rethink some of my
> bindings... some of these aren't completely obvious though.
>
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