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From Ludovic Pénet <l.pe...@senat.fr>
Subject Re: ViewScoped bean created multiple times?
Date Sat, 08 Nov 2014 12:41:49 GMT
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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