Minor correction to prev. message.
The defintion fo Resolvable should be the following:
interface Resolvable
{
public void resolve( ServiceResolver resolver ) throws
ServiceException;
}
Steve.
> -----Original Message-----
> From: Stephen McConnell [mailto:[EMAIL PROTECTED]]
> Sent: Sunday, 17 February, 2002 18:05
> To: Avalon Developers List
> Subject: RE: Son of ComponentManager
>
>
>
>
> Leo Sutic wrote:
> [snip]
>
> > The question is then: Given a ServiceResolver that provides a
> > unified way of obtaining services irrespective of whether they are
> > pooled or not, what use is there for ServiceManager?
>
> Because an implementation of ServiceManager is not polluted with
> operations against which it has not semantics. Specifically, all
> operations defined under ServiceManager are well defined - no ambiguity.
> ServiceResolver captures semantics of pooled services without ambiguity.
> So the up-side is that the interfaces are cleaner and the object mode is
> consistent. The down-side is that a lifecycle pipeline needs to be aware
> of the additional ServiceResolver interface. For me the up-side
> significantly outweighs the downside.
>
> Here is consolidation of the interfaces based on a logical extrapolation
> of the conclusions reached under this thread:
>
> interface Serviceable
> {
> public void service( ServiceManager manager ) throws
> ServiceException;
> }
>
> interface ServiceManager
> {
> Object lookup( String role );
> boolean hasService( String role );
> }
>
> interface ServiceSelector
> {
> Object select( Object policy );
> boolean isSelectable( Object policy );
> }
>
> interface Resolvable extends Serviceable{};
> interface ServiceResolver extends ServiceManager
> {
> Object lookup( String role, Object token );
> void release( Object object );
> void releaseAll( Object token );
> }
>
> interface PooledSelector extends ServiceSelector
> {
> Object select( Object token, Object policy );
> }
>
> Over to you.
> Cheers, Steve.
>
>
> --
> To unsubscribe, e-mail:
<mailto:[EMAIL PROTECTED]>
For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
--
To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]>
For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
