Also, the added benefit is that you get compile-time checking of the
existance of all Pages. If you reference a Page which does not exist you
will get a compiler error, which is great :)
I think of Application.add(Page) as being the same mechanism as
Page.add(component). You're nested sub-components inside a container
component.
Gili
Gili wrote:
You'd only have to register the *root* Pages. All other pages
(including bundled third party ones) are discovered for free.
Gili
Igor Vaynberg wrote:
I think it would really suck to have to register all your pages. Also
what
about pages that come bundled with a third party lib - same problem
remains.
-igor
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Gili
Sent: Thursday, August 11, 2005 9:26 AM
To: [email protected]
Subject: Re: [Wicket-develop] feedback refactor and paging navigation
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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