Re: One v.s N EventBus

I've been using multiple EventBus instances together with Gin/Guice
and named annotations. So for example each view that needs to
communicate in some way with my REST server is attached to the @Server
HandlerManager. That way each component can have multiple
communication channels open and it is possible to re-use some events
across several buses. For example: I defined a simple FilterEvent
which takes a single String as an argument. Depending on the event bus
you are going to use you either filter on types or descriptions here
(so I don't need a FilterTypeEvent and FilterDescriptionEvent).

That said, I've moved away from multiple event buses since this can
get really confusing sometimes ...

On Sat, Jul 31, 2010 at 6:03 AM, Dean S. Jones <deansjones@gmail.com> wrote:
> Looking at finishing up an idea, and I have come across a thought in
> MVP: Global v.s a multiple/hierarchy of view/presenter EventBus's, and
> wondered if anyone
> had explored this avenue. The basics are there is the global EventBus,
> as is typical now, and a local EventBus for actions in the current
> View/Presenter, there
> may be even more levels, say per sub-panel/component, and the choice
> to propagate the events between levels. My current... idiom for using
> this is the dispatch
> of... "DataModelChange" events, when I don't really know exactly WHO
> in the current hierarchy is "listening" ( the UI is composed
> dynamically, so I don't have total
> foreknowledge of the components interests ). Using GIN/Guice for
> injection, obviously, I have to subclass the view/presenter EventBus
> to keep it distinct from
> the global EventBus type. So, just wondering if anyone has jumped into
> this, and what ideas/patterns have fallen out of it for you.
>
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