[Seaside] immediate display alert to user while Ajax request

Mon Jul 24 11:35:06 UTC 2017

and also thank you for the hint with the ThreadPool, Paul and Ramon.
I have to implement this, too!

2017-07-24 12:18 GMT+02:00 Sabine Manaa <manaa.sabine at gmail.com>:

> Hi Joachim,
>
> you are right. This was the point.
>
> I had another problem with getting the session in the forked process. I
> asked in Discord and Max Leske helped.
> To geht the session, I have to do the following in the Ajax request:
>
> | requestContext |
>  requestContext := WACurrentRequestContext value.
> [ WACurrentRequestContext use: requestContext during: [ self session
> dosomething ] ] fork.
>
> Thank you for your help!
> Sabine
>
> 2017-07-23 10:55 GMT+02:00 jtuchel [via Smalltalk] <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=4956534&i=0>>:
>
>> Sabine,
>>
>> I think you need to fork  a new (background) process in order to have it
>> run independently of the Ajax callbacks. The Ajax callbacks will be
>> executed one after the other, there will never be any progress reporting.
>>
>> So I THINK what you absolutely have to do is to start the long running
>> Ajax callback as another process.
>>
>> So start by putting your sequence of process steps in a
>>
>> [
>>  ] fork.
>>
>> block and see if it improves things.
>>
>>
>> I am using an inst var of the component instead of the session, but I
>> guess that doesn't really matter. Using the session is probably a much
>> better idea because you could then use this facility for a general solution
>> that works for all ajax callbacks that run longer...
>>
>>
>> HTH
>>
>> Joachim
>>
>>
>>
>> Am 21.07.17 um 17:31 schrieb Sabine Manaa:
>>
>> Hi Joachim, all,
>>
>> thanks a lot! I think I am very near to the solution but there is one
>> problem remaining: within the Ajax block, the JQLoad   seems to be
>> "blocked". I explain:
>>
>> * I have an attribute @directUserMessage: in my session initialized with
>> an empty string.
>>
>> *In my main view I have >>renderLoadIntervalMessageOn: html
>> html paragraph
>> id: 'spf-direct-message';
>> script:
>> (html jQuery this load
>> onComplete:
>> (' javascript which shows the snackbar if spa-direct-message is set'));
>> html: [ :r | self renderMessageOn: r ];
>> interval: 1 seconds);
>> with: [ self renderMessageOn: html ]
>>
>>  >>renderMessageOn: html
>> self session directUserMessage isEmpty
>> ifFalse: [ html render: self session directUserMessage ]
>>
>>
>> I have my button invoking the report generation:
>>
>> onClick:
>> (html jQuery ajax
>> script: [ :script |
>> self session generateReportFiles: script.
>>  ...]);
>> with: 'PDF'.
>>
>> in >>generateReportFiles:
>> "i set the directUserMessages:"
>> self session directUserMessage: 'Erstelle Reisekostenabrechnungen, bitte
>> warten...'.
>> RKAPDFWriter new createCostReports: self.
>> self session directUserMessage: 'Erstelle Belege, bitte warten...'.
>> RKAPDFWriter new createReceiptReports: self.
>> self session directUserMessage: 'Erstelle Fahrten, bitte warten...'.
>> RKAPDFWriter new createVehicleReports: self.
>> self session directUserMessage: 'Erstelle Buchungen, bitte warten...'.
>> RKAPDFWriter new createBookingReports: self.
>> self session directUserMessage: ''
>>
>> I tried I with a test button:
>> html mdlButton
>> onClick:
>>  (html jQuery ajax script: [ :script | self session directUserMessage:
>> 'test' ]);
>> with: 'set message'
>>
>> this works perfect - after clicking on the test button, the snackbar is
>> showing every second again.
>> So, I can say that the principle was clear and I have a possibility to
>> show individual messages by setting the string in the session.
>>
>> BUT: while I am in the Ajax block, it does not work.
>> I put a console.log() into the javascript code and AFTER finishing the
>> Ajax, all the messages are put there.
>> It seems to wait till the Ajax call is finished.
>>
>> I have put an output  into the transcript:
>>
>> renderMessageOn: html
>> Transcript crShow: Time now printString , '-' , self session
>> directUserMessage.
>>
>> and there I see, that while I am in the Ajax block, there is no output.
>> While I am not in the Ajax block, it renders the time into it each second.
>>
>> What is wrong here, can anyone explain?
>> Joachim, do you also set the instance variable with the text from an Ajax
>> block?
>>
>> Regards
>> Sabine
>>
>>
>>
>>
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>> Ajax request
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>> Sent from the Seaside General mailing list archive
>> <http://forum.world.st/Seaside-General-f86180.html> at Nabble.com.
>>
>>
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>>
>> --
>> -----------------------------------------------------------------------
>> Objektfabrik Joachim Tuchel          [hidden email] <http:///user/SendEmail.jtp?type=node&node=4956392&i=1>
>> Fliederweg 1                         http://www.objektfabrik.de
>> D-71640 Ludwigsburg                  http://joachimtuchel.wordpress.com
>> Telefon: +49 7141 56 10 86 0         Fax: +49 7141 56 10 86 1
>>
>>
>>
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> View this message in context: Re: immediate display alert to user while
> Ajax request
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> Sent from the Seaside General mailing list archive
> <http://forum.world.st/Seaside-General-f86180.html> at Nabble.com.
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