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Posted to users@wicket.apache.org by Michael Fortin <mf...@monetizeit.com> on 2007/08/01 15:56:08 UTC
basic questions: cookies, session state
Hello,
I'm new to wicket and after going through the docs I still have some
unanswered questions. If someone could answer them or point me in the
right direction, I'd appreciate it.
- In other frameworks, if I want to save state between requests I add
the attribute to the session. How do different pages in wicket access
the same session attribute? There was just a post about this called
'Sharing a model' that addresses this but with no example. How do you do
that?
- On every form submission I want to set the valid fields on a session
object. In spring I override the onBindAndValidate and iterate over the
errors. In Wicket, if there is no validation errors it's pretty simple,
override the nested form's onSubmit but where do I get access to the
model on invalid submits?
- How do I explicitly read and set a cookie?
- On session destroy I need to clean up my session attributes. Do I
override SessionStore and implement my own destroy method?
Thanks,
Michael
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Re: basic questions: cookies, session state
Posted by Igor Vaynberg <ig...@gmail.com>.
On 8/1/07, Michael Fortin <mf...@monetizeit.com> wrote:
>
> Thanks Igor for your response.
>
> Sorry, I didn't explain myself clearly. Partial form data can be
> valuable to us in some cases. So, in the case of an incomplete or
> invalid form submission, we take the valid info and put it in a session
> placeholder. If they don't complete the form we still evaluate what we
> have and possibly save the information when the session expires.
>
> Question one, is there a way to examine the model before the feedback
> panel gets returned?
wicket processing by default is atomic. either validation passes and all
models are updated, or it fails and none are updated.
what you can do is visit form components under a form, call isvalid() to see
if they are valid or not and then either save the raw user input getInput()
or save the type converted input getConvertedInput()
And two, how would I handle that session placeholder on session expire?
> There doesn't seem to be an obvious replacement for
> javax.servlet.http.HttpSessionListener#sessionDestroyed
like i said in my previous email, isessionstore.unbind() is what you want
afaict. if not you can still install your own httpsessionlistener. see
WIcketSessionFilter to get access to wicket session object outside of wicket
requests.
-igor
Thanks again,
> Michael
>
>
>
> Igor Vaynberg wrote:
> > On 8/1/07, Michael Fortin <mf...@monetizeit.com> wrote:
> >
> >> - In other frameworks, if I want to save state between requests I add
> >> the attribute to the session. How do different pages in wicket access
> >> the same session attribute? There was just a post about this called
> >> 'Sharing a model' that addresses this but with no example. How do you
> do
> >> that?
> >>
> >
> >
> > class viewuserpage extends webpage {
> > public viewuserpage(imodel<user> user) {
> > add(new link("edit", user) {
> > onclick() {
> > setresponsepage(new edituserpage(getmodel());
> > ^ pass the user model to the edit page
> > }
> > }
> > }
> >
> > class edituserpage extends webpage {
> > public edituserpage(imodel<user> user) {
> > ...
> > }
> > }
> >
> >
> > - On every form submission I want to set the valid fields on a session
> >
> >> object. In spring I override the onBindAndValidate and iterate over
> the
> >> errors.
> >>
> >
> >
> > why exactly do you need to store field values in session?
> >
> > In Wicket, if there is no validation errors it's pretty simple,
> >
> >> override the nested form's onSubmit but where do I get access to the
> >> model on invalid submits?
> >>
> >
> >
> > if there is an error you cannot get to the invalid field's model because
> the
> > model isnt updated on errors. for example if you have a textfield with a
> > model that expects an integer and you put "a" then we cannot push the
> string
> > into the model. once again why do you need to have access to this?
> > feedbackpanel seems to cover the 90% usecase. for the rest you can use a
> > visitor to visit all invalid form components.
> >
> >
> > - How do I explicitly read and set a cookie?
> >
> >
> > ((WebRequest)getRequest()).getCookies();
> > ((WebResponse)getResponse()).add/deleteCookie(cookie);
> >
> > - On session destroy I need to clean up my session attributes. Do I
> >
> >> override SessionStore and implement my own destroy method?
> >>
> >
> >
> > no. sessionstore only has one instance per application. destroy() is
> called
> > when application is destroyed - just like the javadoc says - you want
> > unbind() and dont forget to call super.
> >
> > -igor
> >
> >
> > Thanks,
> >
> >> Michael
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >> For additional commands, e-mail: users-help@wicket.apache.org
> >>
> >>
> >>
> >
> >
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
Re: basic questions: cookies, session state
Posted by Michael Fortin <mf...@monetizeit.com>.
Thanks Igor for your response.
Sorry, I didn't explain myself clearly. Partial form data can be
valuable to us in some cases. So, in the case of an incomplete or
invalid form submission, we take the valid info and put it in a session
placeholder. If they don't complete the form we still evaluate what we
have and possibly save the information when the session expires.
Question one, is there a way to examine the model before the feedback
panel gets returned?
And two, how would I handle that session placeholder on session expire?
There doesn't seem to be an obvious replacement for
javax.servlet.http.HttpSessionListener#sessionDestroyed
Thanks again,
Michael
Igor Vaynberg wrote:
> On 8/1/07, Michael Fortin <mf...@monetizeit.com> wrote:
>
>> - In other frameworks, if I want to save state between requests I add
>> the attribute to the session. How do different pages in wicket access
>> the same session attribute? There was just a post about this called
>> 'Sharing a model' that addresses this but with no example. How do you do
>> that?
>>
>
>
> class viewuserpage extends webpage {
> public viewuserpage(imodel<user> user) {
> add(new link("edit", user) {
> onclick() {
> setresponsepage(new edituserpage(getmodel());
> ^ pass the user model to the edit page
> }
> }
> }
>
> class edituserpage extends webpage {
> public edituserpage(imodel<user> user) {
> ...
> }
> }
>
>
> - On every form submission I want to set the valid fields on a session
>
>> object. In spring I override the onBindAndValidate and iterate over the
>> errors.
>>
>
>
> why exactly do you need to store field values in session?
>
> In Wicket, if there is no validation errors it's pretty simple,
>
>> override the nested form's onSubmit but where do I get access to the
>> model on invalid submits?
>>
>
>
> if there is an error you cannot get to the invalid field's model because the
> model isnt updated on errors. for example if you have a textfield with a
> model that expects an integer and you put "a" then we cannot push the string
> into the model. once again why do you need to have access to this?
> feedbackpanel seems to cover the 90% usecase. for the rest you can use a
> visitor to visit all invalid form components.
>
>
> - How do I explicitly read and set a cookie?
>
>
> ((WebRequest)getRequest()).getCookies();
> ((WebResponse)getResponse()).add/deleteCookie(cookie);
>
> - On session destroy I need to clean up my session attributes. Do I
>
>> override SessionStore and implement my own destroy method?
>>
>
>
> no. sessionstore only has one instance per application. destroy() is called
> when application is destroyed - just like the javadoc says - you want
> unbind() and dont forget to call super.
>
> -igor
>
>
> Thanks,
>
>> Michael
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>>
>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: basic questions: cookies, session state
Posted by Igor Vaynberg <ig...@gmail.com>.
On 8/1/07, Michael Fortin <mf...@monetizeit.com> wrote:
>
>
> - In other frameworks, if I want to save state between requests I add
> the attribute to the session. How do different pages in wicket access
> the same session attribute? There was just a post about this called
> 'Sharing a model' that addresses this but with no example. How do you do
> that?
class viewuserpage extends webpage {
public viewuserpage(imodel<user> user) {
add(new link("edit", user) {
onclick() {
setresponsepage(new edituserpage(getmodel());
^ pass the user model to the edit page
}
}
}
class edituserpage extends webpage {
public edituserpage(imodel<user> user) {
...
}
}
- On every form submission I want to set the valid fields on a session
> object. In spring I override the onBindAndValidate and iterate over the
> errors.
why exactly do you need to store field values in session?
In Wicket, if there is no validation errors it's pretty simple,
> override the nested form's onSubmit but where do I get access to the
> model on invalid submits?
if there is an error you cannot get to the invalid field's model because the
model isnt updated on errors. for example if you have a textfield with a
model that expects an integer and you put "a" then we cannot push the string
into the model. once again why do you need to have access to this?
feedbackpanel seems to cover the 90% usecase. for the rest you can use a
visitor to visit all invalid form components.
- How do I explicitly read and set a cookie?
((WebRequest)getRequest()).getCookies();
((WebResponse)getResponse()).add/deleteCookie(cookie);
- On session destroy I need to clean up my session attributes. Do I
> override SessionStore and implement my own destroy method?
no. sessionstore only has one instance per application. destroy() is called
when application is destroyed - just like the javadoc says - you want
unbind() and dont forget to call super.
-igor
Thanks,
> Michael
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>