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From "Jonathan Hawkes" <jhaw...@adsnm.com>
Subject Re: Startable doesn't has a isRunning() interface ?
Date Wed, 08 Oct 2003 18:59:31 GMT
Perhaps then the container should provide a sort of thread management
component through the ServiceManager.

----- Original Message ----- 
From: "Stephen McConnell" <mcconnell@apache.org>
To: "Avalon Developers List" <dev@avalon.apache.org>
Sent: Wednesday, October 08, 2003 12:50 PM
Subject: Re: Startable doesn't has a isRunning() interface ?


>
>
> Jonathan Hawkes wrote:
>
> >I would say it's the responsibility of the component to act as a
container
> >for any threads it starts up.
> >
>
> I'm ok with the notion of a container creating threads do its own stuff
> - but this is not exactly the same thing as a component starting up a
> thread to do its prime objective.  The thing is that seems to me to be a
> conflict between the responsibilities of a container to assure service
> availablity, and the reopsibility of the component to implement the
> service.  Under the current Startable model, the container has no way of
> assuring service availablity.  I.e. under the current interfaces its the
> component to container communication between startup and shutdown that
> remains undefined.
>
> Stephen.
>
>
> >Just because a component implements Startable
> >does not necessarily mean that it is going to allocate its own threads.
> >(Granted, that will be the case 99.9% of the time.)
> >
> >----- Original Message ----- 
> >From: "Stephen McConnell" <mcconnell@apache.org>
> >To: "Avalon Developers List" <dev@avalon.apache.org>
> >Sent: Wednesday, October 08, 2003 10:53 AM
> >Subject: Re: Startable doesn't has a isRunning() interface ?
> >
> >
> >
> >
> >>Jonathan Hawkes wrote:
> >>
> >>
> >>
> >>>Yes.  An isRunning() method would not be useful to the container.  The
> >>>container knows whether the startable isRunning or not (ie: it has
called
> >>>start() and not stop() ).
> >>>
> >>>
> >>>
> >>Yeeees .. but!
> >>
> >>Consdider the component in question has been started. The component gets
> >>everything it needs from the container and goes about its business and
in
> >>the case of a startable component this typically means that the
component
> >>is creating its own thread of execution.  Assuming that something goes
> >>wrong - there is not contractual interface through which the component
> >>can notify the container that it's execution thread has terminated.
> >>
> >>I think the real underlying issue here is component/container
> >>responsibility. Who should be creating and supervising/monitoring the
> >>thread - the component or the container?
> >>
> >>Stephen.
> >>
> >>
> >>
> >>>----- Original Message ----- 
> >>>From: "Yannick Menager" <ymenager_ml@fastmail.fm>
> >>>To: <dev@avalon.apache.org>
> >>>Sent: Wednesday, October 08, 2003 10:17 AM
> >>>Subject: Startable doesn't has a isRunning() interface ?
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Is there any reason Startable doesn't has a isRunning() ( or something
> >>>>like that ) interface ?
> >>>>
> >>>>
> >>>>
> >>>>---------------------------------------------------------------------
> >>>>To unsubscribe, e-mail: dev-unsubscribe@avalon.apache.org
> >>>>For additional commands, e-mail: dev-help@avalon.apache.org
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>---------------------------------------------------------------------
> >>>To unsubscribe, e-mail: dev-unsubscribe@avalon.apache.org
> >>>For additional commands, e-mail: dev-help@avalon.apache.org
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>-- 
> >>
> >>Stephen J. McConnell
> >>mailto:mcconnell@apache.org
> >>
> >>
> >>
> >>
> >>---------------------------------------------------------------------
> >>To unsubscribe, e-mail: dev-unsubscribe@avalon.apache.org
> >>For additional commands, e-mail: dev-help@avalon.apache.org
> >>
> >>
> >>
> >>
> >
> >
> >---------------------------------------------------------------------
> >To unsubscribe, e-mail: dev-unsubscribe@avalon.apache.org
> >For additional commands, e-mail: dev-help@avalon.apache.org
> >
> >
> >
> >
>
> -- 
>
> Stephen J. McConnell
> mailto:mcconnell@apache.org
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@avalon.apache.org
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>
>


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