Hi All, esp. the Leo's! :)
Thanks guys for widing my perspectives on how to create components within
Avalon :)
I'll give the various approaches a go and see which one works best in my
particular application.
Cheers,
Marcus
On Mon, Jul 28, 2003 at 10:49:20AM +0200, Leo Simons wrote:
> Marcus Crafter wrote:
> >On Fri, Jul 25, 2003 at 11:09:46AM -0400, Berin Loritsch wrote:
> >
> >Currently I have a component requires a URI location to work, it has
> >4 or so methods in it's interface, each of them need the remote URI
> >location
> >for the methods to work. At the moment I specify the URI location
> >as a parameter to each method, something like:
> >
> >interface Component {
> >
> > void doOp1(URI uri);
> > void doOp2(URI uri);
> > void doOp3(URI uri);
> > void dpOp4(URI uri);
> >}
> >
> >Ideally I'd like to be able to specify the URI once, and then be able to
> >call the methods, outside of Avalon you'd do something like:
> >
> >Component c = new Component("http://host/location/";);
> >c.doOp1();
> >....
> >c.doOp2();
> >
> >as a constructor parameter.
>
> think of seperating various types of constructor arguments for your comp
> into the comp configuration, the comp dependencies, etc etc. The URI is
> logically part of the client component configuration, right? Jason van
> Zyl did this in plexus with the Configurator pattern:
>
> interface ServiceBroker extends ServiceManager
> {
> Object lookup( String role, Configuration configuration );
> }
>
> the easy way out is to not make everything into an avalon component, but
> have an avalon component provide you with the worker class:
>
> interface MyComponentManager
> {
> String ROLE = MyComponentManager.class.getName();
> Component newInstance( String URI );
> }
>
> mcm = (MyComponentManager)m_sm.lookup( MyComponentManager.ROLE );
> component = mcm.newInstance( m_configuration
> .getchild( "component-uri" ).getValue() );
>
> the clean way out is probably to use a lifecycle extension to decorate
> your component with transaction support and make the client component
> configuration part of the transaction state.
>
>
> cheers!
>
>
> - Leo
>
>
>
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