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Posted to dev@wicket.apache.org by Kurt Clauss <kc...@hotmail.com> on 2015/10/27 15:47:48 UTC
Wicket training material
Hi Martin!! My name is Kurt Clauss. I'm contacting you because I see that you are part of the Wicket Training and Consulting group. I am actively pushing for Wicket as a web framework for my company. Some of the push-back I am receiving is because of lack of knowledge. What might we use as good resource(s) for training ourselves?
Thank you,Kurt Clauss
> From: mgrigorov@apache.org
> Date: Tue, 27 Oct 2015 14:44:23 +0200
> Subject: Re: Weird NPE in the DebugBar (7.1.0 release)
> To: dev@wicket.apache.org
>
> Sure. Please attach the quickstart to a ticket. Thanks!
>
> Martin Grigorov
> Wicket Training and Consulting
> https://twitter.com/mtgrigorov
>
> On Tue, Oct 27, 2015 at 2:43 PM, Maxim Solodovnik <so...@gmail.com>
> wrote:
>
> > I can share quickstart if it will save your time
> >
> > Thanks for helping!
> >
> > On Tue, Oct 27, 2015 at 6:38 PM, Maxim Solodovnik <so...@gmail.com>
> > wrote:
> >
> > > Here you are:
> > >
> > https://gist.github.com/solomax/832efd4e11c94accac9b#file-homepage-java-L27
> > > (line 27 produces NPE)
> > >
> > > On Tue, Oct 27, 2015 at 6:35 PM, Martin Grigorov <mg...@apache.org>
> > > wrote:
> > >
> > >> The formatting got lost...
> > >> Please use some pastebin service instead.
> > >>
> > >> Martin Grigorov
> > >> Wicket Training and Consulting
> > >> https://twitter.com/mtgrigorov
> > >>
> > >> On Tue, Oct 27, 2015 at 2:34 PM, Maxim Solodovnik <solomax666@gmail.com
> > >
> > >> wrote:
> > >>
> > >> > OK
> > >> >
> > >> > the issue is reproducible with the code like this:
> > >> >
> > >> > public class HomePage extends WebPage { private static final long
> > >> > serialVersionUID = 1L; private final DebugBar dev; public
> > HomePage(final
> > >> > PageParameters parameters) { super(parameters); add(new
> > Label("version",
> > >> > getApplication().getFrameworkSettings().getVersion())); add(dev = new
> > >> > DebugBar("dev")); dev.setOutputMarkupId(true); // TODO Add your page's
> > >> > components here add(new
> > AbstractAjaxTimerBehavior(Duration.ONE_SECOND) {
> > >> > private static final long serialVersionUID = 1L; @Override protected
> > >> void
> > >> > onTimer(AjaxRequestTarget target) { *target.add(dev);* } }); } }
> > >> > The call in *bold* produces NPE, am I doing something wrong here?
> > >> >
> > >> > On Tue, Oct 27, 2015 at 6:24 PM, Martin Grigorov <
> > mgrigorov@apache.org>
> > >> > wrote:
> > >> >
> > >> > > AjaxRequestHandler is the impl behind AjaxRequestTarget (and
> > >> > > transitively IPartialPageRequestHandler)
> > >> > > interface.
> > >> > >
> > >> > > I'd expect NotSerializableException in the logs with its pretty
> > >> exception
> > >> > > message explaining where AjaxRequestHandler is referenced in your
> > >> > component
> > >> > > tree.
> > >> > >
> > >> > >
> > >> > > Martin Grigorov
> > >> > > Wicket Training and Consulting
> > >> > > https://twitter.com/mtgrigorov
> > >> > >
> > >> > > On Tue, Oct 27, 2015 at 2:15 PM, Maxim Solodovnik <
> > >> solomax666@gmail.com>
> > >> > > wrote:
> > >> > >
> > >> > > > Just grep all my code: have no references to 'AjaxRequestHandler',
> > >> > > > 'IPartialPageRequestHandler'
> > >> > > >
> > >> > > > Actually 2 things are scares me:
> > >> > > > 1) everything works with wicket 7.0.0
> > >> > > > 2) everything works in DEPLOYMENT mode
> > >> > > >
> > >> > > > Hopefully will be able to create quickstart, or find the reason
> > >> > > >
> > >> > > > On Tue, Oct 27, 2015 at 4:51 PM, Martin Grigorov <
> > >> mgrigorov@apache.org
> > >> > >
> > >> > > > wrote:
> > >> > > >
> > >> > > > > Maybe your application keeps a reference to ARH.
> > >> > > > > It shouldn't be serializable because it is per request.
> > >> > > > >
> > >> > > > > Martin Grigorov
> > >> > > > > Wicket Training and Consulting
> > >> > > > > https://twitter.com/mtgrigorov
> > >> > > > >
> > >> > > > > On Tue, Oct 27, 2015 at 12:47 PM, Maxim Solodovnik <
> > >> > > solomax666@gmail.com
> > >> > > > >
> > >> > > > > wrote:
> > >> > > > >
> > >> > > > > > It seems AjaxRequestHandler is not serializable, why is it
> > being
> > >> > > > > serialized
> > >> > > > > > in DEVELOPMENT mode?
> > >> > > > > > will try to create quickstart for this
> > >> > > > > >
> > >> > > > > > On Tue, Oct 27, 2015 at 3:57 PM, Maxim Solodovnik <
> > >> > > > solomax666@gmail.com>
> > >> > > > > > wrote:
> > >> > > > > >
> > >> > > > > > > Surprisingly this error is caused by "Not serializable
> > >> > > > > > > component
> > org.apache.wicket.ajax.AjaxRequestHandler$1@ef915bc3
> > >> "
> > >> > > > > > > not sure how to find what is wrong
> > >> > > > > > > The issue is not reproducible in DEPLOYMENT mode
> > >> > > > > > >
> > >> > > > > > >
> > >> > > > > > > On Tue, Oct 27, 2015 at 1:11 PM, Maxim Solodovnik <
> > >> > > > > solomax666@gmail.com>
> > >> > > > > > > wrote:
> > >> > > > > > >
> > >> > > > > > >> Works as expected using simple quickstart
> > >> > > > > > >> Will try to debug serialization process
> > >> > > > > > >>
> > >> > > > > > >> On Tue, Oct 27, 2015 at 9:42 AM, Maxim Solodovnik <
> > >> > > > > solomax666@gmail.com
> > >> > > > > > >
> > >> > > > > > >> wrote:
> > >> > > > > > >>
> > >> > > > > > >>> Hello,
> > >> > > > > > >>>
> > >> > > > > > >>> I'm getting weird NPE in wicket 7.1.0 debug bar, here is
> > the
> > >> > > stack
> > >> > > > > > trace:
> > >> > > > > > >>>
> > >> > > > > > >>> java.lang.RuntimeException: An error occurred while
> > getting
> > >> the
> > >> > > > model
> > >> > > > > > object for Component: [Component id = data, page =
> > >> > > > > > org.apache.openmeetings.web.pages.MainPage, path =
> > >> > > > > > 0:dev:content:contributors:3:contrib:link:data.Label,
> > isVisible
> > >> =
> > >> > > true,
> > >> > > > > > isVersioned = true, markup = [markup =
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> > jar:file:/home/solomax/work/openmeetings/branches/3.0.x/dist/red5/webapps/openmeetings/WEB-INF/lib/wicket-devutils-jar-7.1.0.jar!/org/apache/wicket/devutils/debugbar/StandardDebugPanel.html
> > >> > > > > > >>> <span wicket:id="data"></span>, index = 0, current =
> > '<span
> > >> > > > > > wicket:id="data">' (line 0, column 0)]]
> > >> > > > > > >>> at
> > >> > > > > >
> > >> > >
> > org.apache.wicket.Component.getDefaultModelObject(Component.java:1631)
> > >> > > > > > >>> at
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> > org.apache.wicket.Component.getDefaultModelObjectAsString(Component.java:1654)
> > >> > > > > > >>> at
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> > org.apache.wicket.markup.html.basic.Label.onComponentTagBody(Label.java:115)
> > >> > > > > > >>> at
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >> >
> > >>
> > org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:70)
> > >> > > > > > >>>
> > >> > > > > > >>>
> > >> > > > > > >>> full log: http://pastebin.com/u9N6Kbe0
> > >> > > > > > >>>
> > >> > > > > > >>> According to the debugger page is being serialized to the
> > >> null
> > >> > > byte
> > >> > > > > > array :(
> > >> > > > > > >>>
> > >> > > > > > >>> Would appreciate any help on investigating this
> > >> > > > > > >>>
> > >> > > > > > >>>
> > >> > > > > > >>> Sorry for the raising this too late, but I had no time to
> > >> test
> > >> > > RC2
> > >> > > > > for
> > >> > > > > > >>> 7.1.0 :(
> > >> > > > > > >>>
> > >> > > > > > >>>
> > >> > > > > > >>> --
> > >> > > > > > >>> WBR
> > >> > > > > > >>> Maxim aka solomax
> > >> > > > > > >>>
> > >> > > > > > >>
> > >> > > > > > >>
> > >> > > > > > >>
> > >> > > > > > >> --
> > >> > > > > > >> WBR
> > >> > > > > > >> Maxim aka solomax
> > >> > > > > > >>
> > >> > > > > > >
> > >> > > > > > >
> > >> > > > > > >
> > >> > > > > > > --
> > >> > > > > > > WBR
> > >> > > > > > > Maxim aka solomax
> > >> > > > > > >
> > >> > > > > >
> > >> > > > > >
> > >> > > > > >
> > >> > > > > > --
> > >> > > > > > WBR
> > >> > > > > > Maxim aka solomax
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > > >
> > >> > > >
> > >> > > > --
> > >> > > > WBR
> > >> > > > Maxim aka solomax
> > >> > > >
> > >> > >
> > >> >
> > >> >
> > >> >
> > >> > --
> > >> > WBR
> > >> > Maxim aka solomax
> > >> >
> > >>
> > >
> > >
> > >
> > > --
> > > WBR
> > > Maxim aka solomax
> > >
> >
> >
> >
> > --
> > WBR
> > Maxim aka solomax
> >
RE: Wicket training material
Posted by Kurt Clauss <kc...@hotmail.com>.
Oops, my apologies to all!!!
> From: kc2112@hotmail.com
> To: dev@wicket.apache.org
> Subject: Wicket training material
> Date: Tue, 27 Oct 2015 09:47:48 -0500
>
> Hi Martin!! My name is Kurt Clauss. I'm contacting you because I see that you are part of the Wicket Training and Consulting group. I am actively pushing for Wicket as a web framework for my company. Some of the push-back I am receiving is because of lack of knowledge. What might we use as good resource(s) for training ourselves?
> Thank you,Kurt Clauss
>
> > From: mgrigorov@apache.org
> > Date: Tue, 27 Oct 2015 14:44:23 +0200
> > Subject: Re: Weird NPE in the DebugBar (7.1.0 release)
> > To: dev@wicket.apache.org
> >
> > Sure. Please attach the quickstart to a ticket. Thanks!
> >
> > Martin Grigorov
> > Wicket Training and Consulting
> > https://twitter.com/mtgrigorov
> >
> > On Tue, Oct 27, 2015 at 2:43 PM, Maxim Solodovnik <so...@gmail.com>
> > wrote:
> >
> > > I can share quickstart if it will save your time
> > >
> > > Thanks for helping!
> > >
> > > On Tue, Oct 27, 2015 at 6:38 PM, Maxim Solodovnik <so...@gmail.com>
> > > wrote:
> > >
> > > > Here you are:
> > > >
> > > https://gist.github.com/solomax/832efd4e11c94accac9b#file-homepage-java-L27
> > > > (line 27 produces NPE)
> > > >
> > > > On Tue, Oct 27, 2015 at 6:35 PM, Martin Grigorov <mg...@apache.org>
> > > > wrote:
> > > >
> > > >> The formatting got lost...
> > > >> Please use some pastebin service instead.
> > > >>
> > > >> Martin Grigorov
> > > >> Wicket Training and Consulting
> > > >> https://twitter.com/mtgrigorov
> > > >>
> > > >> On Tue, Oct 27, 2015 at 2:34 PM, Maxim Solodovnik <solomax666@gmail.com
> > > >
> > > >> wrote:
> > > >>
> > > >> > OK
> > > >> >
> > > >> > the issue is reproducible with the code like this:
> > > >> >
> > > >> > public class HomePage extends WebPage { private static final long
> > > >> > serialVersionUID = 1L; private final DebugBar dev; public
> > > HomePage(final
> > > >> > PageParameters parameters) { super(parameters); add(new
> > > Label("version",
> > > >> > getApplication().getFrameworkSettings().getVersion())); add(dev = new
> > > >> > DebugBar("dev")); dev.setOutputMarkupId(true); // TODO Add your page's
> > > >> > components here add(new
> > > AbstractAjaxTimerBehavior(Duration.ONE_SECOND) {
> > > >> > private static final long serialVersionUID = 1L; @Override protected
> > > >> void
> > > >> > onTimer(AjaxRequestTarget target) { *target.add(dev);* } }); } }
> > > >> > The call in *bold* produces NPE, am I doing something wrong here?
> > > >> >
> > > >> > On Tue, Oct 27, 2015 at 6:24 PM, Martin Grigorov <
> > > mgrigorov@apache.org>
> > > >> > wrote:
> > > >> >
> > > >> > > AjaxRequestHandler is the impl behind AjaxRequestTarget (and
> > > >> > > transitively IPartialPageRequestHandler)
> > > >> > > interface.
> > > >> > >
> > > >> > > I'd expect NotSerializableException in the logs with its pretty
> > > >> exception
> > > >> > > message explaining where AjaxRequestHandler is referenced in your
> > > >> > component
> > > >> > > tree.
> > > >> > >
> > > >> > >
> > > >> > > Martin Grigorov
> > > >> > > Wicket Training and Consulting
> > > >> > > https://twitter.com/mtgrigorov
> > > >> > >
> > > >> > > On Tue, Oct 27, 2015 at 2:15 PM, Maxim Solodovnik <
> > > >> solomax666@gmail.com>
> > > >> > > wrote:
> > > >> > >
> > > >> > > > Just grep all my code: have no references to 'AjaxRequestHandler',
> > > >> > > > 'IPartialPageRequestHandler'
> > > >> > > >
> > > >> > > > Actually 2 things are scares me:
> > > >> > > > 1) everything works with wicket 7.0.0
> > > >> > > > 2) everything works in DEPLOYMENT mode
> > > >> > > >
> > > >> > > > Hopefully will be able to create quickstart, or find the reason
> > > >> > > >
> > > >> > > > On Tue, Oct 27, 2015 at 4:51 PM, Martin Grigorov <
> > > >> mgrigorov@apache.org
> > > >> > >
> > > >> > > > wrote:
> > > >> > > >
> > > >> > > > > Maybe your application keeps a reference to ARH.
> > > >> > > > > It shouldn't be serializable because it is per request.
> > > >> > > > >
> > > >> > > > > Martin Grigorov
> > > >> > > > > Wicket Training and Consulting
> > > >> > > > > https://twitter.com/mtgrigorov
> > > >> > > > >
> > > >> > > > > On Tue, Oct 27, 2015 at 12:47 PM, Maxim Solodovnik <
> > > >> > > solomax666@gmail.com
> > > >> > > > >
> > > >> > > > > wrote:
> > > >> > > > >
> > > >> > > > > > It seems AjaxRequestHandler is not serializable, why is it
> > > being
> > > >> > > > > serialized
> > > >> > > > > > in DEVELOPMENT mode?
> > > >> > > > > > will try to create quickstart for this
> > > >> > > > > >
> > > >> > > > > > On Tue, Oct 27, 2015 at 3:57 PM, Maxim Solodovnik <
> > > >> > > > solomax666@gmail.com>
> > > >> > > > > > wrote:
> > > >> > > > > >
> > > >> > > > > > > Surprisingly this error is caused by "Not serializable
> > > >> > > > > > > component
> > > org.apache.wicket.ajax.AjaxRequestHandler$1@ef915bc3
> > > >> "
> > > >> > > > > > > not sure how to find what is wrong
> > > >> > > > > > > The issue is not reproducible in DEPLOYMENT mode
> > > >> > > > > > >
> > > >> > > > > > >
> > > >> > > > > > > On Tue, Oct 27, 2015 at 1:11 PM, Maxim Solodovnik <
> > > >> > > > > solomax666@gmail.com>
> > > >> > > > > > > wrote:
> > > >> > > > > > >
> > > >> > > > > > >> Works as expected using simple quickstart
> > > >> > > > > > >> Will try to debug serialization process
> > > >> > > > > > >>
> > > >> > > > > > >> On Tue, Oct 27, 2015 at 9:42 AM, Maxim Solodovnik <
> > > >> > > > > solomax666@gmail.com
> > > >> > > > > > >
> > > >> > > > > > >> wrote:
> > > >> > > > > > >>
> > > >> > > > > > >>> Hello,
> > > >> > > > > > >>>
> > > >> > > > > > >>> I'm getting weird NPE in wicket 7.1.0 debug bar, here is
> > > the
> > > >> > > stack
> > > >> > > > > > trace:
> > > >> > > > > > >>>
> > > >> > > > > > >>> java.lang.RuntimeException: An error occurred while
> > > getting
> > > >> the
> > > >> > > > model
> > > >> > > > > > object for Component: [Component id = data, page =
> > > >> > > > > > org.apache.openmeetings.web.pages.MainPage, path =
> > > >> > > > > > 0:dev:content:contributors:3:contrib:link:data.Label,
> > > isVisible
> > > >> =
> > > >> > > true,
> > > >> > > > > > isVersioned = true, markup = [markup =
> > > >> > > > > >
> > > >> > > > >
> > > >> > > >
> > > >> > >
> > > >> >
> > > >>
> > > jar:file:/home/solomax/work/openmeetings/branches/3.0.x/dist/red5/webapps/openmeetings/WEB-INF/lib/wicket-devutils-jar-7.1.0.jar!/org/apache/wicket/devutils/debugbar/StandardDebugPanel.html
> > > >> > > > > > >>> <span wicket:id="data"></span>, index = 0, current =
> > > '<span
> > > >> > > > > > wicket:id="data">' (line 0, column 0)]]
> > > >> > > > > > >>> at
> > > >> > > > > >
> > > >> > >
> > > org.apache.wicket.Component.getDefaultModelObject(Component.java:1631)
> > > >> > > > > > >>> at
> > > >> > > > > >
> > > >> > > > >
> > > >> > > >
> > > >> > >
> > > >> >
> > > >>
> > > org.apache.wicket.Component.getDefaultModelObjectAsString(Component.java:1654)
> > > >> > > > > > >>> at
> > > >> > > > > >
> > > >> > > > >
> > > >> > > >
> > > >> > >
> > > >> >
> > > >>
> > > org.apache.wicket.markup.html.basic.Label.onComponentTagBody(Label.java:115)
> > > >> > > > > > >>> at
> > > >> > > > > >
> > > >> > > > >
> > > >> > > >
> > > >> > >
> > > >> >
> > > >>
> > > org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:70)
> > > >> > > > > > >>>
> > > >> > > > > > >>>
> > > >> > > > > > >>> full log: http://pastebin.com/u9N6Kbe0
> > > >> > > > > > >>>
> > > >> > > > > > >>> According to the debugger page is being serialized to the
> > > >> null
> > > >> > > byte
> > > >> > > > > > array :(
> > > >> > > > > > >>>
> > > >> > > > > > >>> Would appreciate any help on investigating this
> > > >> > > > > > >>>
> > > >> > > > > > >>>
> > > >> > > > > > >>> Sorry for the raising this too late, but I had no time to
> > > >> test
> > > >> > > RC2
> > > >> > > > > for
> > > >> > > > > > >>> 7.1.0 :(
> > > >> > > > > > >>>
> > > >> > > > > > >>>
> > > >> > > > > > >>> --
> > > >> > > > > > >>> WBR
> > > >> > > > > > >>> Maxim aka solomax
> > > >> > > > > > >>>
> > > >> > > > > > >>
> > > >> > > > > > >>
> > > >> > > > > > >>
> > > >> > > > > > >> --
> > > >> > > > > > >> WBR
> > > >> > > > > > >> Maxim aka solomax
> > > >> > > > > > >>
> > > >> > > > > > >
> > > >> > > > > > >
> > > >> > > > > > >
> > > >> > > > > > > --
> > > >> > > > > > > WBR
> > > >> > > > > > > Maxim aka solomax
> > > >> > > > > > >
> > > >> > > > > >
> > > >> > > > > >
> > > >> > > > > >
> > > >> > > > > > --
> > > >> > > > > > WBR
> > > >> > > > > > Maxim aka solomax
> > > >> > > > > >
> > > >> > > > >
> > > >> > > >
> > > >> > > >
> > > >> > > >
> > > >> > > > --
> > > >> > > > WBR
> > > >> > > > Maxim aka solomax
> > > >> > > >
> > > >> > >
> > > >> >
> > > >> >
> > > >> >
> > > >> > --
> > > >> > WBR
> > > >> > Maxim aka solomax
> > > >> >
> > > >>
> > > >
> > > >
> > > >
> > > > --
> > > > WBR
> > > > Maxim aka solomax
> > > >
> > >
> > >
> > >
> > > --
> > > WBR
> > > Maxim aka solomax
> > >
>