I suggested, multiple times now, how we can completely eliminate the
need for these external configuration files. No one has yet to explain
to me why this idea would not work or why it is worse than the current
design.
Why not use this mechanism?
public interface IComponentInitializer
{
public void init(Application application);
public List<Class> getNestedComponents();
}
where getNestedComponents() returns the class names of all components
that will be added into the component. This will allow you to discover
(recursively) all the components in a given Application.
An end-user then only has to say:
Application.add(rootPage1);
Application.add(rootPage2);
and Wicket will then automatically find out about all the remaining
components by invoking getNestedComponents().
Finally, as I already explained, we move component configuration
(calling add() etc...) from the constructor (where it currently resides)
into a separate method (i.e. init()) and the default constructor for
Page should do nothing. This way Wicket can easily construct pages,
invoke getNestedComponents() to find out all nested components in a very
efficient manner.
Gili
Johan Compagner wrote:
I don't think you can search for that..
If you know a way then i am will check that out.
because how would you do that? How do you can through ALL packages (==
directories)
johan
Igor Vaynberg wrote:
Yes I see Jon. Thank you for a very long and detailed explanation as
to why
my idea sucked. I still think there is some room for improvement in the
current situation. Cant we do a saerch through avail packages looking
for a
.resources file (im not sure how this would be done).
It would be nice to simply have DatePicker.resources side by side with
DatePicker.java. It would eliminate refactoring headaches at least as
far as
the package names go and it wouldn't be sitting in some separate folder.
-Igor
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jonathan Locke
Sent: Thursday, August 11, 2005 1:17 AM
To: [email protected]
Subject: Re: [Wicket-develop] feedback refactor and paging navigation
actually it's not just that the service registration info has to be
put somewhere, it's that a client component that's using a service to
create a dynamic resource like, for example, some kind of panel that
wants a dynamic button image created...
/that component/ would have to be able to create its images /when the
app starts/ (because of clustering and server restarts). and /only
the panel component itself/ can or should know about this /and/ it
has to be done on startup. wicket's resource
handling classes are already fully featured, object-oriented
"services" (but less
vague and more OO powerful) by virtue of the fact that they implement
the IResourceListener interface and respond to requests for resources
(ANY resource). so i just don't see any value at all in this service
concept beyond what we've already got. in fact, i think it would
significantly /subtract/ from wicket's existing support for dynamic
resources (think "service" if you prefer)... and again, even if we
did change the world, it wouldn't solve the bootstrapping problem we
have for components.
Johan Compagner wrote:
how does a component with a dynamically generated image make that
image available in your scheme?
the component has to register the image with the service, doesn't
it?
The component doesn't need to register an image with a service, it
can register the service that creates the images.
The images themselves can be created on the first request
http://www..../app?service=mydynamicbuttons&button=A
Whenever this url is hit wicket forwards the control to the
registered mydynamicbuttons service (registered by whatever
component) which creates the image A, caches it, and streams it to
response. Or precreate whatever you need when the service
object is
created and registered with the application.
And THIS last part is just the problem
how does it register itself? When?
Where is it specified that a component does that?
I think in the end we have exactly the same thing...
you have a file like:
mydynamicbuttons=my.class.that.exposes.this.Service
johan
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