[Seaside] Explicit rendering of a logging component

[Zirbler]

Hi Lukas,

thanks for your explaination and showing me the direction to go.

Christoph J. Bachinger



Lukas Renggli wrote:
> 
> Hi,
> 
> have a look at the documentation in #call:. Sending this message
> blocks the execution of the code and sends a response to the
> web-server. The code only resumes when you do an answer from the
> component and that you can only trigger from the client.
> 
> You need to take a different approach. First, you need to fork the
> long task into a separate process as Seaside only processes on request
> per session at a time. Second, updating a page from the server is not
> possible without the use of Javascript on the client, HTTP does not
> provide a mechanism to display something new on the client without
> that the client asks for it. You can either use Javascript to
> regularly poll for updates (easy), or use Comet to stream changes to
> the client (tricky).
> 
> Check out the mailing list archive, there were several threads about
> this in the past.
> 
> Cheers,
> Lukas
> 
> On Thu, May 14, 2009 at 12:19 PM, Zirbler <cj-bachinger at gmx.de> wrote:
>>
>> Hi all,
>>
>> I try to render a logging component to show the user what my software is
>> doing while he is waiting after clicking on an html anchor. The problem
>> is
>> that I need an explicit refresh of the logging component to show the
>> actual
>> status. I looked in this forum and found "WARenderLoop new call:
>> aComponent"
>> which renders my component fine, but calling this, the code after it, is
>> not
>> longer executed. It does not run to the halt. Any comment welcome.
>>
>> bookingsClose
>>    |file|
>>    self markets do: [:market|
>>        file := market createExcelFile.
>>        self loggingComponent addMessage: market name , ' Excel file
>> created'.
>>        WARenderLoop new call: self loggingComponent. "Explicit render
>> loggingComponent"
>>        self halt.
>>        market emailSend: file.
>>        self loggingComponent addMessage: market name , ' Email sended'.
>>        WARenderLoop new call: self loggingComponent. "Explicit render
>> loggingComponent"
>>        ...].
>>
>> thanks in forward
>>
>>
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>>
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> 
> 
> 
> -- 
> Lukas Renggli
> http://www.lukas-renggli.ch
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> seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
> 
> 

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