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Posted to users@wicket.apache.org by ma...@javakaffee.de on 2009/04/13 12:16:28 UTC
Lazy loading via AJAX on stateless pages?
Hi,
I'm currently evaluating how it's possible to have stateless pages with
some information loaded asynchronously via AJAX.
I found these postings that are somehow related to this
http://www.nabble.com/Stateless-AJAX-links-td20031309.html
http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
but I'm not sure what exactly has to be done to achieve what I want.
Basically I have a simple page where I added an AjaxBehavior to a label
that shall get replaced via AJAX:
final Label label = new Label( "info", "foo" );
add( label.setOutputMarkupId( true ) );
label.add(new AbstractDefaultAjaxBehavior() {
@Override
protected void respond( AjaxRequestTarget target ) {
final Label lazyLabel = new Label( "info", "loaded asynchronously" );
Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
target.addComponent( lazyLabel );
}
@Override
public void renderHead( IHeaderResponse response ) {
super.renderHead( response );
response.renderOnDomReadyJavascript( getCallbackScript().toString() );
}
} );
This turns the previously statelesss page to stateful, AFAICS because of
getStatelessHint( Component component )
returning false for the label.
When I change this to return true, wicket says the page is expired on the AJAX request...
Can anybody say what had to be done?
Btw: I'm using wicket-1.4-SNAPSHOT.
Thanx in advance,
cheers,
Martin
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Re: Lazy loading via AJAX on stateless pages?
Posted by Martin Grotzke <ma...@javakaffee.de>.
Hi,
reposting - can somebody help with this?
Thanx in advance,
cheers,
Martin
On Mon, 2009-04-20 at 00:33 +0200, Martin Grotzke wrote:
> Now in the default constructor of my page I added a behavior linking to
> the page with page parameters and I added such a constructor taking
> parameters. In this constructor, I set a new AjaxRequestTarget on the
> request cycle and add some component to the target.
>
> When I request my page, I see the ajax request coming in (using
> firebug), but the response is empty and contains the header
> Ajax-Location which triggers a redirect (javascript location update).
> Why does this "redirect" occur?
>
> A part of the default constructor looks like this:
>
> final Label label = new Label("info", "<img src=\""
> + urlFor( AbstractDefaultAjaxBehavior.INDICATOR ) + "\"/>");
>
> add( label.setOutputMarkupId( true ).setEscapeModelStrings(false) );
>
> label.add( new AbstractDefaultAjaxBehavior() {
>
> @Override
> protected void respond( AjaxRequestTarget target ) {
> throw new UnsupportedOperationException();
> }
>
> @Override
> public void renderHead( IHeaderResponse response ) {
> super.renderHead( response );
> response.renderOnDomReadyJavascript( getCallbackScript().toString() );
> }
>
> @Override
> public CharSequence getCallbackUrl( boolean onlyTargetActivePage ) {
> final PageParameters parameters = new PageParameters();
> parameters.add( "foo", "bar" );
> return urlFor( Index.class, parameters );
> }
>
> });
>
> The constructor taking page parameters looks like this:
>
> public Index( PageParameters pageParameters ) {
> final AjaxRequestTarget target = new AjaxRequestTarget( this );
> WebRequestCycle.get().setRequestTarget( target );
>
> final Label lazyLabel = new Label( "info", pageParameters.getString( "foo" ) );
> target.addComponent( lazyLabel.setOutputMarkupId( true ) );
> }
>
>
> What's wrong with this? Can the page when invoked via ajax with request
> params output the necessary xml?
>
> Thanx && cheers,
> Martin
>
>
>
> On Sat, 2009-04-18 at 19:05 -0500, Jeremy Thomerson wrote:
> > Using urlFor(...) generates a stateful, session-relative link - unless you
> > call urlFor(Class, PageParameters) - which is stateless because it encodes
> > the class and parameters in the URL. In the other URLs, the state is stored
> > in the session, and the URL is basically a map to navigate the component
> > tree to get back to the component that generated the URL.
> >
> > --
> > Jeremy Thomerson
> > http://www.wickettraining.com
> >
> >
> >
> > On Sat, Apr 18, 2009 at 4:27 PM, Martin Grotzke <
> > martin.grotzke@javakaffee.de> wrote:
> >
> > > What exactly causes the page to be stateful when urlFor(Component,
> > > Interface) is invoked?
> > >
> > > I would like to make only minimal changes compared to original wicket
> > > ajax handling and would really like to reuse as much as possible of
> > > wicket ajax handling (e.g. adding components to be updated to the
> > > AjaxRequestTarget).
> > >
> > > Do you think it would be possible to create a Behavior that uses a
> > > callback url which links to a (stateless) page with page parameters.
> > > This page provides a constructor taking parameters and sets an
> > > AjaxRequestTarget on the RequestCycle. It creates and adds all
> > > components which shall be changed to the target.
> > >
> > > What do you think? Can you imagine other ways of being as close as
> > > possible to wicket?
> > >
> > > Thanx && cheers,
> > > Martin
> > >
> > >
> > >
> > > On Fri, 2009-04-17 at 15:40 -0700, Igor Vaynberg wrote:
> > > > sure, you can use behaviors and requesttargets of whatever kind. just
> > > > make sure nothing on your page calls urlfor(component, interface) -
> > > > this is what causes the page to be stateful.
> > > >
> > > > -igor
> > > >
> > > > On Fri, Apr 17, 2009 at 3:14 PM, Martin Grotzke
> > > > <ma...@javakaffee.de> wrote:
> > > > > Wow, very fast response!
> > > > >
> > > > > Is it possible to use wicket concepts like RequestTarget and Behavior
> > > on
> > > > > the serverside? I'd like to have this integrated with wicket as much as
> > > > > possible.
> > > > >
> > > > > Cheers,
> > > > > Martin
> > > > >
> > > > >
> > > > > On Fri, 2009-04-17 at 14:55 -0700, Igor Vaynberg wrote:
> > > > >> you cannot use wicket ajax facilities as they are designed for
> > > > >> stateful pages - the link that wicket uses for ajax callback is
> > > > >> inherently stateful.
> > > > >>
> > > > >> what you can do is write javascript yourself using jquery, or
> > > > >> something else to perform an ajax callback to some url you control and
> > > > >> then replace some markup on your page with returned markup.
> > > > >>
> > > > >> -igor
> > > > >>
> > > > >> On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
> > > > >> <ma...@javakaffee.de> wrote:
> > > > >> > Hello,
> > > > >> >
> > > > >> > can somebody help with this?
> > > > >> >
> > > > >> > Thanx && cheers,
> > > > >> > Martin
> > > > >> >
> > > > >> >
> > > > >> > On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.dewrote:
> > > > >> >> Hi,
> > > > >> >>
> > > > >> >> I'm currently evaluating how it's possible to have stateless pages
> > > with
> > > > >> >> some information loaded asynchronously via AJAX.
> > > > >> >>
> > > > >> >> I found these postings that are somehow related to this
> > > > >> >> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
> > > > >> >>
> > > http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
> > > > >> >>
> > > > >> >> but I'm not sure what exactly has to be done to achieve what I
> > > want.
> > > > >> >>
> > > > >> >> Basically I have a simple page where I added an AjaxBehavior to a
> > > label
> > > > >> >> that shall get replaced via AJAX:
> > > > >> >>
> > > > >> >> final Label label = new Label( "info", "foo" );
> > > > >> >> add( label.setOutputMarkupId( true ) );
> > > > >> >> label.add(new AbstractDefaultAjaxBehavior() {
> > > > >> >>
> > > > >> >> @Override
> > > > >> >> protected void respond( AjaxRequestTarget target ) {
> > > > >> >> final Label lazyLabel = new Label( "info", "loaded
> > > asynchronously" );
> > > > >> >> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
> > > > >> >> target.addComponent( lazyLabel );
> > > > >> >> }
> > > > >> >>
> > > > >> >> @Override
> > > > >> >> public void renderHead( IHeaderResponse response ) {
> > > > >> >> super.renderHead( response );
> > > > >> >> response.renderOnDomReadyJavascript(
> > > getCallbackScript().toString() );
> > > > >> >> }
> > > > >> >>
> > > > >> >> } );
> > > > >> >>
> > > > >> >> This turns the previously statelesss page to stateful, AFAICS
> > > because of
> > > > >> >> getStatelessHint( Component component )
> > > > >> >> returning false for the label.
> > > > >> >>
> > > > >> >> When I change this to return true, wicket says the page is expired
> > > on the AJAX request...
> > > > >> >>
> > > > >> >> Can anybody say what had to be done?
> > > > >> >>
> > > > >> >> Btw: I'm using wicket-1.4-SNAPSHOT.
> > > > >> >>
> > > > >> >> Thanx in advance,
> > > > >> >> cheers,
> > > > >> >> Martin
> > > > >> >>
> > > > >> >>
> > > > >> >>
> > > ---------------------------------------------------------------------
> > > > >> >> 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
> > > > >>
> > > > >
> > > >
> > > > ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > > > For additional commands, e-mail: users-help@wicket.apache.org
> > > >
> > >
--
Martin Grotzke
http://www.javakaffee.de/blog/
Re: Lazy loading via AJAX on stateless pages?
Posted by Martin Grotzke <ma...@javakaffee.de>.
Now in the default constructor of my page I added a behavior linking to
the page with page parameters and I added such a constructor taking
parameters. In this constructor, I set a new AjaxRequestTarget on the
request cycle and add some component to the target.
When I request my page, I see the ajax request coming in (using
firebug), but the response is empty and contains the header
Ajax-Location which triggers a redirect (javascript location update).
Why does this "redirect" occur?
A part of the default constructor looks like this:
final Label label = new Label("info", "<img src=\""
+ urlFor( AbstractDefaultAjaxBehavior.INDICATOR ) + "\"/>");
add( label.setOutputMarkupId( true ).setEscapeModelStrings(false) );
label.add( new AbstractDefaultAjaxBehavior() {
@Override
protected void respond( AjaxRequestTarget target ) {
throw new UnsupportedOperationException();
}
@Override
public void renderHead( IHeaderResponse response ) {
super.renderHead( response );
response.renderOnDomReadyJavascript( getCallbackScript().toString() );
}
@Override
public CharSequence getCallbackUrl( boolean onlyTargetActivePage ) {
final PageParameters parameters = new PageParameters();
parameters.add( "foo", "bar" );
return urlFor( Index.class, parameters );
}
});
The constructor taking page parameters looks like this:
public Index( PageParameters pageParameters ) {
final AjaxRequestTarget target = new AjaxRequestTarget( this );
WebRequestCycle.get().setRequestTarget( target );
final Label lazyLabel = new Label( "info", pageParameters.getString( "foo" ) );
target.addComponent( lazyLabel.setOutputMarkupId( true ) );
}
What's wrong with this? Can the page when invoked via ajax with request
params output the necessary xml?
Thanx && cheers,
Martin
On Sat, 2009-04-18 at 19:05 -0500, Jeremy Thomerson wrote:
> Using urlFor(...) generates a stateful, session-relative link - unless you
> call urlFor(Class, PageParameters) - which is stateless because it encodes
> the class and parameters in the URL. In the other URLs, the state is stored
> in the session, and the URL is basically a map to navigate the component
> tree to get back to the component that generated the URL.
>
> --
> Jeremy Thomerson
> http://www.wickettraining.com
>
>
>
> On Sat, Apr 18, 2009 at 4:27 PM, Martin Grotzke <
> martin.grotzke@javakaffee.de> wrote:
>
> > What exactly causes the page to be stateful when urlFor(Component,
> > Interface) is invoked?
> >
> > I would like to make only minimal changes compared to original wicket
> > ajax handling and would really like to reuse as much as possible of
> > wicket ajax handling (e.g. adding components to be updated to the
> > AjaxRequestTarget).
> >
> > Do you think it would be possible to create a Behavior that uses a
> > callback url which links to a (stateless) page with page parameters.
> > This page provides a constructor taking parameters and sets an
> > AjaxRequestTarget on the RequestCycle. It creates and adds all
> > components which shall be changed to the target.
> >
> > What do you think? Can you imagine other ways of being as close as
> > possible to wicket?
> >
> > Thanx && cheers,
> > Martin
> >
> >
> >
> > On Fri, 2009-04-17 at 15:40 -0700, Igor Vaynberg wrote:
> > > sure, you can use behaviors and requesttargets of whatever kind. just
> > > make sure nothing on your page calls urlfor(component, interface) -
> > > this is what causes the page to be stateful.
> > >
> > > -igor
> > >
> > > On Fri, Apr 17, 2009 at 3:14 PM, Martin Grotzke
> > > <ma...@javakaffee.de> wrote:
> > > > Wow, very fast response!
> > > >
> > > > Is it possible to use wicket concepts like RequestTarget and Behavior
> > on
> > > > the serverside? I'd like to have this integrated with wicket as much as
> > > > possible.
> > > >
> > > > Cheers,
> > > > Martin
> > > >
> > > >
> > > > On Fri, 2009-04-17 at 14:55 -0700, Igor Vaynberg wrote:
> > > >> you cannot use wicket ajax facilities as they are designed for
> > > >> stateful pages - the link that wicket uses for ajax callback is
> > > >> inherently stateful.
> > > >>
> > > >> what you can do is write javascript yourself using jquery, or
> > > >> something else to perform an ajax callback to some url you control and
> > > >> then replace some markup on your page with returned markup.
> > > >>
> > > >> -igor
> > > >>
> > > >> On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
> > > >> <ma...@javakaffee.de> wrote:
> > > >> > Hello,
> > > >> >
> > > >> > can somebody help with this?
> > > >> >
> > > >> > Thanx && cheers,
> > > >> > Martin
> > > >> >
> > > >> >
> > > >> > On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.dewrote:
> > > >> >> Hi,
> > > >> >>
> > > >> >> I'm currently evaluating how it's possible to have stateless pages
> > with
> > > >> >> some information loaded asynchronously via AJAX.
> > > >> >>
> > > >> >> I found these postings that are somehow related to this
> > > >> >> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
> > > >> >>
> > http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
> > > >> >>
> > > >> >> but I'm not sure what exactly has to be done to achieve what I
> > want.
> > > >> >>
> > > >> >> Basically I have a simple page where I added an AjaxBehavior to a
> > label
> > > >> >> that shall get replaced via AJAX:
> > > >> >>
> > > >> >> final Label label = new Label( "info", "foo" );
> > > >> >> add( label.setOutputMarkupId( true ) );
> > > >> >> label.add(new AbstractDefaultAjaxBehavior() {
> > > >> >>
> > > >> >> @Override
> > > >> >> protected void respond( AjaxRequestTarget target ) {
> > > >> >> final Label lazyLabel = new Label( "info", "loaded
> > asynchronously" );
> > > >> >> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
> > > >> >> target.addComponent( lazyLabel );
> > > >> >> }
> > > >> >>
> > > >> >> @Override
> > > >> >> public void renderHead( IHeaderResponse response ) {
> > > >> >> super.renderHead( response );
> > > >> >> response.renderOnDomReadyJavascript(
> > getCallbackScript().toString() );
> > > >> >> }
> > > >> >>
> > > >> >> } );
> > > >> >>
> > > >> >> This turns the previously statelesss page to stateful, AFAICS
> > because of
> > > >> >> getStatelessHint( Component component )
> > > >> >> returning false for the label.
> > > >> >>
> > > >> >> When I change this to return true, wicket says the page is expired
> > on the AJAX request...
> > > >> >>
> > > >> >> Can anybody say what had to be done?
> > > >> >>
> > > >> >> Btw: I'm using wicket-1.4-SNAPSHOT.
> > > >> >>
> > > >> >> Thanx in advance,
> > > >> >> cheers,
> > > >> >> Martin
> > > >> >>
> > > >> >>
> > > >> >>
> > ---------------------------------------------------------------------
> > > >> >> 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
> > > >>
> > > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > > For additional commands, e-mail: users-help@wicket.apache.org
> > >
> >
Re: Lazy loading via AJAX on stateless pages?
Posted by Jeremy Thomerson <je...@wickettraining.com>.
Using urlFor(...) generates a stateful, session-relative link - unless you
call urlFor(Class, PageParameters) - which is stateless because it encodes
the class and parameters in the URL. In the other URLs, the state is stored
in the session, and the URL is basically a map to navigate the component
tree to get back to the component that generated the URL.
--
Jeremy Thomerson
http://www.wickettraining.com
On Sat, Apr 18, 2009 at 4:27 PM, Martin Grotzke <
martin.grotzke@javakaffee.de> wrote:
> What exactly causes the page to be stateful when urlFor(Component,
> Interface) is invoked?
>
> I would like to make only minimal changes compared to original wicket
> ajax handling and would really like to reuse as much as possible of
> wicket ajax handling (e.g. adding components to be updated to the
> AjaxRequestTarget).
>
> Do you think it would be possible to create a Behavior that uses a
> callback url which links to a (stateless) page with page parameters.
> This page provides a constructor taking parameters and sets an
> AjaxRequestTarget on the RequestCycle. It creates and adds all
> components which shall be changed to the target.
>
> What do you think? Can you imagine other ways of being as close as
> possible to wicket?
>
> Thanx && cheers,
> Martin
>
>
>
> On Fri, 2009-04-17 at 15:40 -0700, Igor Vaynberg wrote:
> > sure, you can use behaviors and requesttargets of whatever kind. just
> > make sure nothing on your page calls urlfor(component, interface) -
> > this is what causes the page to be stateful.
> >
> > -igor
> >
> > On Fri, Apr 17, 2009 at 3:14 PM, Martin Grotzke
> > <ma...@javakaffee.de> wrote:
> > > Wow, very fast response!
> > >
> > > Is it possible to use wicket concepts like RequestTarget and Behavior
> on
> > > the serverside? I'd like to have this integrated with wicket as much as
> > > possible.
> > >
> > > Cheers,
> > > Martin
> > >
> > >
> > > On Fri, 2009-04-17 at 14:55 -0700, Igor Vaynberg wrote:
> > >> you cannot use wicket ajax facilities as they are designed for
> > >> stateful pages - the link that wicket uses for ajax callback is
> > >> inherently stateful.
> > >>
> > >> what you can do is write javascript yourself using jquery, or
> > >> something else to perform an ajax callback to some url you control and
> > >> then replace some markup on your page with returned markup.
> > >>
> > >> -igor
> > >>
> > >> On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
> > >> <ma...@javakaffee.de> wrote:
> > >> > Hello,
> > >> >
> > >> > can somebody help with this?
> > >> >
> > >> > Thanx && cheers,
> > >> > Martin
> > >> >
> > >> >
> > >> > On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.dewrote:
> > >> >> Hi,
> > >> >>
> > >> >> I'm currently evaluating how it's possible to have stateless pages
> with
> > >> >> some information loaded asynchronously via AJAX.
> > >> >>
> > >> >> I found these postings that are somehow related to this
> > >> >> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
> > >> >>
> http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
> > >> >>
> > >> >> but I'm not sure what exactly has to be done to achieve what I
> want.
> > >> >>
> > >> >> Basically I have a simple page where I added an AjaxBehavior to a
> label
> > >> >> that shall get replaced via AJAX:
> > >> >>
> > >> >> final Label label = new Label( "info", "foo" );
> > >> >> add( label.setOutputMarkupId( true ) );
> > >> >> label.add(new AbstractDefaultAjaxBehavior() {
> > >> >>
> > >> >> @Override
> > >> >> protected void respond( AjaxRequestTarget target ) {
> > >> >> final Label lazyLabel = new Label( "info", "loaded
> asynchronously" );
> > >> >> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
> > >> >> target.addComponent( lazyLabel );
> > >> >> }
> > >> >>
> > >> >> @Override
> > >> >> public void renderHead( IHeaderResponse response ) {
> > >> >> super.renderHead( response );
> > >> >> response.renderOnDomReadyJavascript(
> getCallbackScript().toString() );
> > >> >> }
> > >> >>
> > >> >> } );
> > >> >>
> > >> >> This turns the previously statelesss page to stateful, AFAICS
> because of
> > >> >> getStatelessHint( Component component )
> > >> >> returning false for the label.
> > >> >>
> > >> >> When I change this to return true, wicket says the page is expired
> on the AJAX request...
> > >> >>
> > >> >> Can anybody say what had to be done?
> > >> >>
> > >> >> Btw: I'm using wicket-1.4-SNAPSHOT.
> > >> >>
> > >> >> Thanx in advance,
> > >> >> cheers,
> > >> >> Martin
> > >> >>
> > >> >>
> > >> >>
> ---------------------------------------------------------------------
> > >> >> 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
> > >>
> > >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > For additional commands, e-mail: users-help@wicket.apache.org
> >
>
Re: Lazy loading via AJAX on stateless pages?
Posted by Martin Grotzke <ma...@javakaffee.de>.
What exactly causes the page to be stateful when urlFor(Component,
Interface) is invoked?
I would like to make only minimal changes compared to original wicket
ajax handling and would really like to reuse as much as possible of
wicket ajax handling (e.g. adding components to be updated to the
AjaxRequestTarget).
Do you think it would be possible to create a Behavior that uses a
callback url which links to a (stateless) page with page parameters.
This page provides a constructor taking parameters and sets an
AjaxRequestTarget on the RequestCycle. It creates and adds all
components which shall be changed to the target.
What do you think? Can you imagine other ways of being as close as
possible to wicket?
Thanx && cheers,
Martin
On Fri, 2009-04-17 at 15:40 -0700, Igor Vaynberg wrote:
> sure, you can use behaviors and requesttargets of whatever kind. just
> make sure nothing on your page calls urlfor(component, interface) -
> this is what causes the page to be stateful.
>
> -igor
>
> On Fri, Apr 17, 2009 at 3:14 PM, Martin Grotzke
> <ma...@javakaffee.de> wrote:
> > Wow, very fast response!
> >
> > Is it possible to use wicket concepts like RequestTarget and Behavior on
> > the serverside? I'd like to have this integrated with wicket as much as
> > possible.
> >
> > Cheers,
> > Martin
> >
> >
> > On Fri, 2009-04-17 at 14:55 -0700, Igor Vaynberg wrote:
> >> you cannot use wicket ajax facilities as they are designed for
> >> stateful pages - the link that wicket uses for ajax callback is
> >> inherently stateful.
> >>
> >> what you can do is write javascript yourself using jquery, or
> >> something else to perform an ajax callback to some url you control and
> >> then replace some markup on your page with returned markup.
> >>
> >> -igor
> >>
> >> On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
> >> <ma...@javakaffee.de> wrote:
> >> > Hello,
> >> >
> >> > can somebody help with this?
> >> >
> >> > Thanx && cheers,
> >> > Martin
> >> >
> >> >
> >> > On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.de wrote:
> >> >> Hi,
> >> >>
> >> >> I'm currently evaluating how it's possible to have stateless pages with
> >> >> some information loaded asynchronously via AJAX.
> >> >>
> >> >> I found these postings that are somehow related to this
> >> >> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
> >> >> http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
> >> >>
> >> >> but I'm not sure what exactly has to be done to achieve what I want.
> >> >>
> >> >> Basically I have a simple page where I added an AjaxBehavior to a label
> >> >> that shall get replaced via AJAX:
> >> >>
> >> >> final Label label = new Label( "info", "foo" );
> >> >> add( label.setOutputMarkupId( true ) );
> >> >> label.add(new AbstractDefaultAjaxBehavior() {
> >> >>
> >> >> @Override
> >> >> protected void respond( AjaxRequestTarget target ) {
> >> >> final Label lazyLabel = new Label( "info", "loaded asynchronously" );
> >> >> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
> >> >> target.addComponent( lazyLabel );
> >> >> }
> >> >>
> >> >> @Override
> >> >> public void renderHead( IHeaderResponse response ) {
> >> >> super.renderHead( response );
> >> >> response.renderOnDomReadyJavascript( getCallbackScript().toString() );
> >> >> }
> >> >>
> >> >> } );
> >> >>
> >> >> This turns the previously statelesss page to stateful, AFAICS because of
> >> >> getStatelessHint( Component component )
> >> >> returning false for the label.
> >> >>
> >> >> When I change this to return true, wicket says the page is expired on the AJAX request...
> >> >>
> >> >> Can anybody say what had to be done?
> >> >>
> >> >> Btw: I'm using wicket-1.4-SNAPSHOT.
> >> >>
> >> >> Thanx in advance,
> >> >> cheers,
> >> >> Martin
> >> >>
> >> >>
> >> >> ---------------------------------------------------------------------
> >> >> 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
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
Re: Lazy loading via AJAX on stateless pages?
Posted by Igor Vaynberg <ig...@gmail.com>.
sure, you can use behaviors and requesttargets of whatever kind. just
make sure nothing on your page calls urlfor(component, interface) -
this is what causes the page to be stateful.
-igor
On Fri, Apr 17, 2009 at 3:14 PM, Martin Grotzke
<ma...@javakaffee.de> wrote:
> Wow, very fast response!
>
> Is it possible to use wicket concepts like RequestTarget and Behavior on
> the serverside? I'd like to have this integrated with wicket as much as
> possible.
>
> Cheers,
> Martin
>
>
> On Fri, 2009-04-17 at 14:55 -0700, Igor Vaynberg wrote:
>> you cannot use wicket ajax facilities as they are designed for
>> stateful pages - the link that wicket uses for ajax callback is
>> inherently stateful.
>>
>> what you can do is write javascript yourself using jquery, or
>> something else to perform an ajax callback to some url you control and
>> then replace some markup on your page with returned markup.
>>
>> -igor
>>
>> On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
>> <ma...@javakaffee.de> wrote:
>> > Hello,
>> >
>> > can somebody help with this?
>> >
>> > Thanx && cheers,
>> > Martin
>> >
>> >
>> > On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.de wrote:
>> >> Hi,
>> >>
>> >> I'm currently evaluating how it's possible to have stateless pages with
>> >> some information loaded asynchronously via AJAX.
>> >>
>> >> I found these postings that are somehow related to this
>> >> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
>> >> http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
>> >>
>> >> but I'm not sure what exactly has to be done to achieve what I want.
>> >>
>> >> Basically I have a simple page where I added an AjaxBehavior to a label
>> >> that shall get replaced via AJAX:
>> >>
>> >> final Label label = new Label( "info", "foo" );
>> >> add( label.setOutputMarkupId( true ) );
>> >> label.add(new AbstractDefaultAjaxBehavior() {
>> >>
>> >> @Override
>> >> protected void respond( AjaxRequestTarget target ) {
>> >> final Label lazyLabel = new Label( "info", "loaded asynchronously" );
>> >> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
>> >> target.addComponent( lazyLabel );
>> >> }
>> >>
>> >> @Override
>> >> public void renderHead( IHeaderResponse response ) {
>> >> super.renderHead( response );
>> >> response.renderOnDomReadyJavascript( getCallbackScript().toString() );
>> >> }
>> >>
>> >> } );
>> >>
>> >> This turns the previously statelesss page to stateful, AFAICS because of
>> >> getStatelessHint( Component component )
>> >> returning false for the label.
>> >>
>> >> When I change this to return true, wicket says the page is expired on the AJAX request...
>> >>
>> >> Can anybody say what had to be done?
>> >>
>> >> Btw: I'm using wicket-1.4-SNAPSHOT.
>> >>
>> >> Thanx in advance,
>> >> cheers,
>> >> Martin
>> >>
>> >>
>> >> ---------------------------------------------------------------------
>> >> 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
>>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: Lazy loading via AJAX on stateless pages?
Posted by Martin Grotzke <ma...@javakaffee.de>.
Wow, very fast response!
Is it possible to use wicket concepts like RequestTarget and Behavior on
the serverside? I'd like to have this integrated with wicket as much as
possible.
Cheers,
Martin
On Fri, 2009-04-17 at 14:55 -0700, Igor Vaynberg wrote:
> you cannot use wicket ajax facilities as they are designed for
> stateful pages - the link that wicket uses for ajax callback is
> inherently stateful.
>
> what you can do is write javascript yourself using jquery, or
> something else to perform an ajax callback to some url you control and
> then replace some markup on your page with returned markup.
>
> -igor
>
> On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
> <ma...@javakaffee.de> wrote:
> > Hello,
> >
> > can somebody help with this?
> >
> > Thanx && cheers,
> > Martin
> >
> >
> > On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.de wrote:
> >> Hi,
> >>
> >> I'm currently evaluating how it's possible to have stateless pages with
> >> some information loaded asynchronously via AJAX.
> >>
> >> I found these postings that are somehow related to this
> >> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
> >> http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
> >>
> >> but I'm not sure what exactly has to be done to achieve what I want.
> >>
> >> Basically I have a simple page where I added an AjaxBehavior to a label
> >> that shall get replaced via AJAX:
> >>
> >> final Label label = new Label( "info", "foo" );
> >> add( label.setOutputMarkupId( true ) );
> >> label.add(new AbstractDefaultAjaxBehavior() {
> >>
> >> @Override
> >> protected void respond( AjaxRequestTarget target ) {
> >> final Label lazyLabel = new Label( "info", "loaded asynchronously" );
> >> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
> >> target.addComponent( lazyLabel );
> >> }
> >>
> >> @Override
> >> public void renderHead( IHeaderResponse response ) {
> >> super.renderHead( response );
> >> response.renderOnDomReadyJavascript( getCallbackScript().toString() );
> >> }
> >>
> >> } );
> >>
> >> This turns the previously statelesss page to stateful, AFAICS because of
> >> getStatelessHint( Component component )
> >> returning false for the label.
> >>
> >> When I change this to return true, wicket says the page is expired on the AJAX request...
> >>
> >> Can anybody say what had to be done?
> >>
> >> Btw: I'm using wicket-1.4-SNAPSHOT.
> >>
> >> Thanx in advance,
> >> cheers,
> >> Martin
> >>
> >>
> >> ---------------------------------------------------------------------
> >> 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: Lazy loading via AJAX on stateless pages?
Posted by Igor Vaynberg <ig...@gmail.com>.
you cannot use wicket ajax facilities as they are designed for
stateful pages - the link that wicket uses for ajax callback is
inherently stateful.
what you can do is write javascript yourself using jquery, or
something else to perform an ajax callback to some url you control and
then replace some markup on your page with returned markup.
-igor
On Fri, Apr 17, 2009 at 2:52 PM, Martin Grotzke
<ma...@javakaffee.de> wrote:
> Hello,
>
> can somebody help with this?
>
> Thanx && cheers,
> Martin
>
>
> On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.de wrote:
>> Hi,
>>
>> I'm currently evaluating how it's possible to have stateless pages with
>> some information loaded asynchronously via AJAX.
>>
>> I found these postings that are somehow related to this
>> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
>> http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
>>
>> but I'm not sure what exactly has to be done to achieve what I want.
>>
>> Basically I have a simple page where I added an AjaxBehavior to a label
>> that shall get replaced via AJAX:
>>
>> final Label label = new Label( "info", "foo" );
>> add( label.setOutputMarkupId( true ) );
>> label.add(new AbstractDefaultAjaxBehavior() {
>>
>> @Override
>> protected void respond( AjaxRequestTarget target ) {
>> final Label lazyLabel = new Label( "info", "loaded asynchronously" );
>> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
>> target.addComponent( lazyLabel );
>> }
>>
>> @Override
>> public void renderHead( IHeaderResponse response ) {
>> super.renderHead( response );
>> response.renderOnDomReadyJavascript( getCallbackScript().toString() );
>> }
>>
>> } );
>>
>> This turns the previously statelesss page to stateful, AFAICS because of
>> getStatelessHint( Component component )
>> returning false for the label.
>>
>> When I change this to return true, wicket says the page is expired on the AJAX request...
>>
>> Can anybody say what had to be done?
>>
>> Btw: I'm using wicket-1.4-SNAPSHOT.
>>
>> Thanx in advance,
>> cheers,
>> Martin
>>
>>
>> ---------------------------------------------------------------------
>> 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: Lazy loading via AJAX on stateless pages?
Posted by Martin Grotzke <ma...@javakaffee.de>.
Hello,
can somebody help with this?
Thanx && cheers,
Martin
On Mon, 2009-04-13 at 12:16 +0200, martin.grotzke@javakaffee.de wrote:
> Hi,
>
> I'm currently evaluating how it's possible to have stateless pages with
> some information loaded asynchronously via AJAX.
>
> I found these postings that are somehow related to this
> http://www.nabble.com/Stateless-AJAX-links-td20031309.html
> http://www.nabble.com/Directions-for-Stateless-Ajax-td17518987.html
>
> but I'm not sure what exactly has to be done to achieve what I want.
>
> Basically I have a simple page where I added an AjaxBehavior to a label
> that shall get replaced via AJAX:
>
> final Label label = new Label( "info", "foo" );
> add( label.setOutputMarkupId( true ) );
> label.add(new AbstractDefaultAjaxBehavior() {
>
> @Override
> protected void respond( AjaxRequestTarget target ) {
> final Label lazyLabel = new Label( "info", "loaded asynchronously" );
> Index.this.replace( lazyLabel.setOutputMarkupId( true ) );
> target.addComponent( lazyLabel );
> }
>
> @Override
> public void renderHead( IHeaderResponse response ) {
> super.renderHead( response );
> response.renderOnDomReadyJavascript( getCallbackScript().toString() );
> }
>
> } );
>
> This turns the previously statelesss page to stateful, AFAICS because of
> getStatelessHint( Component component )
> returning false for the label.
>
> When I change this to return true, wicket says the page is expired on the AJAX request...
>
> Can anybody say what had to be done?
>
> Btw: I'm using wicket-1.4-SNAPSHOT.
>
> Thanx in advance,
> cheers,
> Martin
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>