[Solar-talk] Solar Observer - brainstorm

[Travis Swicegood]

Rodrigo Moraes wrote:
> On 9/18/06, Dinh wrote:
>   
>> It may be of interest: http://phpinterceptor.sourceforge.net/ :)
>>     
>
> Dinh, it is a very interesting reading. It uses Pear::Event_Dispatcher
> to register and delegate events to "interceptors". I'm confused about
> the difference between interceptors and observers, but I'll try to
> follow his code and stick with Pear::Event_Dispatcher for the event
> handling, and play with the interceptor idea for a while. Thank you
> for the link!

The difference between an observer and a dispatcher with "interceptors" 
is the location notification mechanism.  With an observer, the 
implementing class actually handles the notification, with a dispatcher 
that is externalized.  Some people consider an observer as an 
anti-pattern simply because of the amount of additional work an object 
has to take on in order for it to work.

Hope that helps,
-Travis