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To: "Tapestry users" <users@tapestry.apache.org>
Subject: Re: Invoke method after page is loaded; when method finishes,
 redirect to another page
References: <AANLkTinb_W2FYAArwfTmuohrz06o3HE-7Xh4EuL1OgWQ@mail.gmail.com>
Date: Fri, 04 Mar 2011 09:24:41 -0300
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From: "Thiago H. de Paula Figueiredo" <thiagohp@gmail.com>
Message-ID: <op.vrtjfath18r83n@arsmachina>
In-Reply-To: <AANLkTinb_W2FYAArwfTmuohrz06o3HE-7Xh4EuL1OgWQ@mail.gmail.com>
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On Fri, 04 Mar 2011 08:38:44 -0300, Nikola Milikic  =

<nikola.milikic@gmail.com> wrote:

> Hi to all,

Hi!

> I'm a newbie to Tapestry and would be grateful for a small assistance.=


Welcome to hte mailing list!

> Since in my Tapestry 5.2 application I'm doing some calculations which=
  =

> can take up to 30 seconds, I wanted to implement when a user clicks on=
 a  =

> button e.g. 'Calculate' to be transferred to a separate page on which =
the
> calculation will be done (with some message like "Calculation in  =

> progress, please wait" and loading icon).
>
> My question is how to automatically after the calculation has been don=
e
> (method doing calculation ended) to transfer the user to a separate pa=
ge  =

> to display results?

Remember that HTTP itself doesn't provide server to client communication=
,  =

just the opposite. You'll need some AJAX code to request to the page if =
 =

the calculation is finished. You can find some custom AJAX examples in  =

this mailing list or in the Tapestry JumpStart. When it's finished, use =
 =

window.location to redirect.

> My first idea was to annotate the method with @PageLoaded annotation:
> @InjectPage
>> private ResultsPage resultsPage ;
>
>
>> @PageLoaded
>> ResultsPage calculate (){
>>         // calculation here
>>         resultsPage.setResults(somethingHere);
>>         return resultsPage;
>> }
>
>
> but that wont do it. And in the documentation it is stated that this  =

> method should return void.

@PageLoaded is invoked just the first time the page class is instanced, =
 =

and in 5.2 this is going to be done just once for the whole webapp life.=


-- =

Thiago H. de Paula Figueiredo
Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,=
  =

and instructor
Owner, Ars Machina Tecnologia da Informa=C3=A7=C3=A3o Ltda.
http://www.arsmachina.com.br

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