Re: [cep-dev] re: Events, Components, Observers and Listeners

[Jackson M. <ja...@te...>]

I would rather there be a mapping of events and handlers similar to how 
we have mapped pages to modules.  That was multiple events can be 
handled by the same handler.  This also means there is a single place 
where all of the application event handlers are defined.

The "listener" would handle all events.  This would likely be in the 
front controller (or called from the front controller).

So, no, I don't think the observer pattern is what we are looking for 
here.  My understanding of the observer pattern is that we would either 
have to load all of the event handlers on every request or we would 
have to wait to fire an event until we got to the component that fired 
the event (since HTTP is stateless).

Feel free to correct me if I am wrong on that one.

-Jackson


On Jan 22, 2005, at 11:22 AM, Marcus Whitney wrote:

> Hey,
>
>  So, I have a question.  How have events/listeners been implemented in 
> Axson, and would that implementation work well with CEP.  Or should we 
> simply consider an observable interface that all overloading classes 
> would implement?
> interface Observable {
>    function attach( Observer $observer);
>    function detach( Observer $observer);
>    function notify();
> }
>
> interface Observer {
>    function run( Observable $observable);
> }
>
> Is there something more elegant?  should there be more ability to 
> define events?  I'm still figuring it all out, but pretty fast so I'm 
> ready to put something in place ASAP.
>
> Lemme know. Thanks.
>
> - Marcus
>
>
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