Re: Processing a form before page components are created
On Wed, May 14, 2008 at 8:24 AM, Joel Halbert <[EMAIL PROTECTED]> wrote:
> unless, i suppose, if you override getPageParameters, something like this:
>
>private void getLinkToUserProfile(final RatingModel r) {
>return new BookmarkablePageLink("username",
> ViewDetails.class) {
>@Override
>public PageParameters getPageParameters() {
>PageParameters pp = new PageParameters();
>pp.put(Params.userId.toString(),
> r.getRating().getUserId());
>return pp;
>}
>
>};
>}
Right, something like that.
Eelco
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Re: Processing a form before page components are created
On Wed, May 14, 2008 at 8:21 AM, Joel Halbert <[EMAIL PROTECTED]> wrote: > What about the situation where one of the components on the Page is a > BookmarkeablePageLink and you need to pass it in some PageParameters? In > this case how do you load the page parameters from the model in a lazy > fashion? It doesn't appear to be possible since PageParameters does not > evaluate against a model, thus the values need to be supplied upfront, while > the page is being created... But you don't have to load the page parameters lazily, right? Eelco - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Processing a form before page components are created
unless, i suppose, if you override getPageParameters, something like this:
private void getLinkToUserProfile(final RatingModel r) {
return new BookmarkablePageLink("username", ViewDetails.class) {
@Override
public PageParameters getPageParameters() {
PageParameters pp = new PageParameters();
pp.put(Params.userId.toString(),
r.getRating().getUserId());
return pp;
}
};
}
--
From: "Joel Halbert" <[EMAIL PROTECTED]>
Sent: Wednesday, May 14, 2008 4:21 PM
To:
Subject: Re: Processing a form before page components are created
What about the situation where one of the components on the Page is a
BookmarkeablePageLink and you need to pass it in some PageParameters? In
this case how do you load the page parameters from the model in a lazy
fashion? It doesn't appear to be possible since PageParameters does not
evaluate against a model, thus the values need to be supplied upfront,
while the page is being created...
--
From: "Joel Halbert" <[EMAIL PROTECTED]>
Sent: Wednesday, May 14, 2008 12:57 PM
To:
Subject: Re: Processing a form before page components are created
I take your point, thanks for the pointer.
--
From: "Eelco Hillenius" <[EMAIL PROTECTED]>
Sent: Wednesday, May 14, 2008 1:31 AM
To:
Subject: Re: Processing a form before page components are created
The reason I want to do this is that my pages are stateless, and I
want to
process the submitted form before all the components on the page are
initialised, incase I need to load different data models, or redirect
the
request to another page, thus saving unnecessary database calls and
component initialisation.
At the moment what I am doing is processing the form by directly
reading
the page parameters in the constructor before I add any components to
the
page, and then redirecting the request or initializing the page as
appropriate (bypassing the use of Form.onSubmit).
If you make sure your models/ components work lazily you can avoid
database calls being done until the components are actually rendered.
Rendering is a separate phase executing after component construction
and form handling. And you can let your form just populate a simple
bean to avoid database access. I wouldn't worry about the creation of
a few components, and you can break of any time with a
RestartResponseException or set the next page (without breaking off
current processing) using setResponsePage.
Eelco
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Re: Processing a form before page components are created
What about the situation where one of the components on the Page is a BookmarkeablePageLink and you need to pass it in some PageParameters? In this case how do you load the page parameters from the model in a lazy fashion? It doesn't appear to be possible since PageParameters does not evaluate against a model, thus the values need to be supplied upfront, while the page is being created... -- From: "Joel Halbert" <[EMAIL PROTECTED]> Sent: Wednesday, May 14, 2008 12:57 PM To: Subject: Re: Processing a form before page components are created I take your point, thanks for the pointer. -- From: "Eelco Hillenius" <[EMAIL PROTECTED]> Sent: Wednesday, May 14, 2008 1:31 AM To: Subject: Re: Processing a form before page components are created The reason I want to do this is that my pages are stateless, and I want to process the submitted form before all the components on the page are initialised, incase I need to load different data models, or redirect the request to another page, thus saving unnecessary database calls and component initialisation. At the moment what I am doing is processing the form by directly reading the page parameters in the constructor before I add any components to the page, and then redirecting the request or initializing the page as appropriate (bypassing the use of Form.onSubmit). If you make sure your models/ components work lazily you can avoid database calls being done until the components are actually rendered. Rendering is a separate phase executing after component construction and form handling. And you can let your form just populate a simple bean to avoid database access. I wouldn't worry about the creation of a few components, and you can break of any time with a RestartResponseException or set the next page (without breaking off current processing) using setResponsePage. Eelco - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Processing a form before page components are created
I take your point, thanks for the pointer. -- From: "Eelco Hillenius" <[EMAIL PROTECTED]> Sent: Wednesday, May 14, 2008 1:31 AM To: Subject: Re: Processing a form before page components are created The reason I want to do this is that my pages are stateless, and I want to process the submitted form before all the components on the page are initialised, incase I need to load different data models, or redirect the request to another page, thus saving unnecessary database calls and component initialisation. At the moment what I am doing is processing the form by directly reading the page parameters in the constructor before I add any components to the page, and then redirecting the request or initializing the page as appropriate (bypassing the use of Form.onSubmit). If you make sure your models/ components work lazily you can avoid database calls being done until the components are actually rendered. Rendering is a separate phase executing after component construction and form handling. And you can let your form just populate a simple bean to avoid database access. I wouldn't worry about the creation of a few components, and you can break of any time with a RestartResponseException or set the next page (without breaking off current processing) using setResponsePage. Eelco - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Processing a form before page components are created
> The reason I want to do this is that my pages are stateless, and I want to > process the submitted form before all the components on the page are > initialised, incase I need to load different data models, or redirect the > request to another page, thus saving unnecessary database calls and > component initialisation. > > At the moment what I am doing is processing the form by directly reading > the page parameters in the constructor before I add any components to the > page, and then redirecting the request or initializing the page as > appropriate (bypassing the use of Form.onSubmit). If you make sure your models/ components work lazily you can avoid database calls being done until the components are actually rendered. Rendering is a separate phase executing after component construction and form handling. And you can let your form just populate a simple bean to avoid database access. I wouldn't worry about the creation of a few components, and you can break of any time with a RestartResponseException or set the next page (without breaking off current processing) using setResponsePage. Eelco - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
