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From Bjørn T Johansen <...@havleik.no>
Subject Re: ViewScoped bean created multiple times?
Date Sat, 08 Nov 2014 15:00:11 GMT
Not mavenised but gradlenised... :)

Can be download from here..: http://www.havleik.no/KBNJulekalender.tar.gz

This is just a project I quickly created to show which numbers have won in a Christmas calendar....



BTJ

On Sat, 08 Nov 2014 14:06:16 +0100
Ludovic Pénet <l.penet@senat.fr> wrote:

> Can you give us some kind of minimal, mavenised project so that we can see ?
> 
> Ludovic
> 
> Le 8 novembre 2014 14:00:22 UTC+01:00, "Bjørn T Johansen" <btj@havleik.no> a écrit
:
> >Ok, but I have tried using @PostConstruct also and it is called as many
> >times as the constructor.... :-|
> >
> >BTJ
> >
> >On Sat, 08 Nov 2014 13:41:49 +0100
> >Ludovic Pénet <l.penet@senat.fr> wrote:
> >
> >> Having an "init" method called once at the beginning is the purpose
> >of @PostConstruct.
> >> 
> >> I may not use the right words, but the @PostConstruct method will be
> >called only once, when the bean is instantiated, even if navigation
> >triggers serialization and multiple objects are instantiated.
> >> 
> >> It will work this way independently of using @ManagedBean or @Named.
> >> 
> >> I bumped my head in walls and trees when I had exactly your
> >problem... :)
> >> 
> >> @+!
> >> 
> >> Le 8 novembre 2014 13:21:08 UTC+01:00, "Bjørn T Johansen"
> ><btj@havleik.no> a écrit :
> >> >Yes, I tried using Weld and CDI but with the same result.
> >> >Also I do not do bean init stuff in the consctructor but in a
> >> >init-method that I am trying to make sure is called only once, which
> >do
> >> >not seem to be
> >> >that easy.....
> >> >
> >> >
> >> >BTJ
> >> >
> >> >On Sat, 08 Nov 2014 13:13:35 +0100
> >> >Ludovic Pénet <l.penet@senat.fr> wrote:
> >> >
> >> >> I would rather use @Named / @Inject, which are more powerful than
> >> >@ManagedBean / @ManagedProperty. You can inject more stuff, in more
> >> >places with less side effects. You would have less side effects with
> >> >properties serialization and such things.
> >> >> 
> >> >> I also usually prefer Deltaspike @ViewAccessScoped to @ViewScope.
> >> >With @ViewAccessScoped, your bean will live as long as it is used
> >> >during user navigation. I find it more handier than @ViewScoped and
> >> >even @FlowScoped, as it requires no configuration.
> >> >> 
> >> >> Finally, I stopped doing bean init stuff in constructors. Objects
> >are
> >> >instantiated during serialization. I prefer to use @PostConstruct
> >for
> >> >init and @PreDestroy for termination stuff.
> >> >> 
> >> >> Hope this helps.
> >> >> 
> >> >> Ludovic
> >> >> 
> >> >> Le 7 novembre 2014 22:22:07 UTC+01:00, "Bjørn T Johansen"
> >> ><btj@havleik.no> a écrit :
> >> >> >That I can do... :)
> >> >> >
> >> >> >Attached...
> >> >> >
> >> >> >
> >> >> >BTJ
> >> >> >
> >> >> >On Fri, 7 Nov 2014 16:14:55 -0500
> >> >> >"Howard W. Smith, Jr." <smithh032772@gmail.com> wrote:
> >> >> >
> >> >> >> That's fine.
> >> >> >> 
> >> >> >> Can you provide your XHTML and java bean definition (source
> >code)
> >> >> >here? You
> >> >> >> provided a little bit of your java bean in primefaces forum.
> >> >> >> 
> >> >> >> Your XHTML and java bean may help us on this list to help
you.
> >> >> >> 
> >> >> >> 
> >> >> >> On Fri, Nov 7, 2014 at 4:11 PM, Bjørn T Johansen
> ><btj@havleik.no>
> >> >> >wrote:
> >> >> >> 
> >> >> >> > Yes, I did.. But since I did not get any answer there
and I
> >> >thought
> >> >> >that
> >> >> >> > this was more a JSF question than a PrimeFaces question,
I
> >> >thought
> >> >> >I should
> >> >> >> > try here.... Was that wrong?
> >> >> >> >
> >> >> >> > BTJ
> >> >> >> >
> >> >> >> > On Fri, 7 Nov 2014 15:58:59 -0500
> >> >> >> > "Howard W. Smith, Jr." <smithh032772@gmail.com>
wrote:
> >> >> >> >
> >> >> >> > > Interesting, you asked the same question in PrimeFaces
> >forum.
> >> >> >> > >
> >> >> >> > > http://forum.primefaces.org/viewtopic.php?f=3&t=40267
> >> >> >> > >
> >> >> >> > >
> >> >> >> > > On Fri, Nov 7, 2014 at 3:42 PM, Bjørn T Johansen
> >> ><btj@havleik.no>
> >> >> >wrote:
> >> >> >> > >
> >> >> >> > > > I trying to create a webapplication using request
and/or
> >> >> >viewscope
> >> >> >> > instead
> >> >> >> > > > of sessionscope, which I have always used...
(Neved
> >needed
> >> >to
> >> >> >concern
> >> >> >> > > > myself with memory usage in the apps I have
implemented..
> >:)
> >> >)
> >> >> >> > > > But I now have a problem using @ViewScoped..
> >> >> >> > > > When I access index.xhtml which uses a managed
bean in
> >> >> >viewscope, the
> >> >> >> > > > constructor is called multiple times. And the
same with
> >an
> >> >init
> >> >> >> > method, that
> >> >> >> > > > should be called only once. I am using..:
> >> >> >> > > >
> >> >> >> > > > <f:metadata>
> >> >> >> > > >     <f:viewAction
> >action="#{calendarController.initPrices}"
> >> >/>
> >> >> >> > > > </f:metadata>
> >> >> >> > > >
> >> >> >> > > > <h:head>......
> >> >> >> > > >
> >> >> >> > > > to call the init method, but I have also tried
using
> >f:event
> >> >> >> > prerenderView
> >> >> >> > > > and also @PostConstruct but I am not able to
make the
> >bean
> >> >call
> >> >> >the
> >> >> >> > init
> >> >> >> > > > method only once...
> >> >> >> > > >
> >> >> >> > > > What am I missing?
> >> >> >> > > >
> >> >> >> > > >
> >> >> >> > > > Regards,
> >> >> >> > > >
> >> >> >> > > > BTJ
> >> >> >> > > > --
> >> >> >> > > >
> >> >> >> > > >
> >> >> >> >
> >> >>
> >>
> >>>-----------------------------------------------------------------------------------------------
> >> >> >> > > > Bjørn T Johansen
> >> >> >> > > >
> >> >> >> > > > btj@havleik.no
> >> >> >> > > >
> >> >> >> > > >
> >> >> >> >
> >> >>
> >>
> >>>-----------------------------------------------------------------------------------------------
> >> >> >> > > > Someone wrote:
> >> >> >> > > > "I understand that if you play a Windows CD
backwards you
> >> >hear
> >> >> >strange
> >> >> >> > > > Satanic messages"
> >> >> >> > > > To which someone replied:
> >> >> >> > > > "It's even worse than that; play it forwards
and it
> >installs
> >> >> >Windows"
> >> >> >> > > >
> >> >> >> > > >
> >> >> >> >
> >> >>
> >>
> >>>-----------------------------------------------------------------------------------------------
> >> >> >> > > >
> >> >> >> >
> >> >> >> >
> >> 

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