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From "Jonathan Hawkes" <jhaw...@adsnm.com>
Subject Re: Startable doesn't has a isRunning() interface ?
Date Thu, 09 Oct 2003 13:27:21 GMT
Your absolutely right.  That would fix it.

----- Original Message ----- 
From: "Berin Loritsch" <bloritsch@apache.org>
To: "Avalon Developers List" <dev@avalon.apache.org>
Sent: Thursday, October 09, 2003 7:05 AM
Subject: Re: Startable doesn't has a isRunning() interface ?


> Jonathan Hawkes wrote:
>
> > In the current specification, it is fairly straightforward to implement
an
> > Avalon container.  When would you suggest the container poll this new
> > isRunning method?  It would be preferable to have the component notify
the
> > container if it shut itself down.  However, then you run the risk of
> > perverting IOC.
>
> Not necessarily.  As an example, I will use Swing components.  Each Swing
> component has a number of listeners available for it.  The Swing component
> doesn't know or care what objects are listening, all it does is send
events
> to the listener.
>
> Therefore, if the component has an add/remove RuntimeListener or some such
> animal, the container could register itself as a listener and receive a
> RuntimeEvent for each change in state.  Alternatively, it might register a
> controlled part of itself for that purpose.
>
> The thing is that the IOC is not inverted, and proper separation is still
> maintained.
>
> It works, but the whole Listener maintenance code can be a PITA to force
> component writers to implement.  For that purpose an Abstract Class would
> be helpful.
>
> -- 
>
> "They that give up essential liberty to obtain a little temporary safety
>   deserve neither liberty nor safety."
>                  - Benjamin Franklin
>
>
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