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 Srinivas Sarda (SSrinivas) Coforge Srinivas Sarda
Coforge
IN
SSrinivas Member since 2015 63 posts
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Posted: May 2, 2017
Last activity: October 16, 2018
Posted: 2 May 2017 15:03 EDT
Last activity: 16 Oct 2018 12:03 EDT
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Asynchronous Data Page not working 7.1.9

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Hello, I'm trying to load Datapage Asynchronously. On tab click calling activity which will do load Datapage method at step 2 and show harness will be executed at step 16. In harness have section which contains a layout inside thus layout, section include and the context page is data page and the layout is configured as defer contents. But until unless the datapage execution completes then only im able to perform button clicks and remaining things. Thanks...!

***Updated by moderator: Lochan to tag SR details***


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Low-Code App Development Dev/Designer Studio Java and Activities User Experience Support Case Created
Posted: 5 years ago
Posted: 2 May 2017 16:27 EDT
Kevin Zheng (KevinZheng_GCS) PEGA Director, Technical Support
Pegasystems Inc.
US
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Are you using connect-wait somewhere in your steps? If yes, go ahead create a SR for further investigation with GCS.
Posted: 5 years ago
Posted: 2 May 2017 19:34 EDT
Susan Liu (SusanLiu_GCS) PEGA Senior Principal Engineer, Technical Support, Runtime Engine
Pegasystems Inc.
US
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Hi, 

Please check this pdn online help:

https://community.pega.com/sites/default/files/help_v719/procomhelpmain.htm

Connect-Wait is used to wait for pages loaded by Load-DataPage.

The pool id parameter to Connect-Wait method is a token used to group Data Pages loaded in the background by Load-DataPage method. When this parameter is set, the Connect-Wait method will wait for all the data pages that are loaded with the same pool id.

So, in your use case, you can add step 3 as "Connect-Wait" and then the rest of steps of your activity. 

Thanks,

Susan

 
Posted: 5 years ago
Posted: 3 May 2017 0:29 EDT
Srinivas Sarda (SSrinivas) Coforge Srinivas Sarda
Coforge
IN
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Yes Step 3 is connect wait.

 

The Data Page Source activity having step 1 as java which will do Thread Sleep for 30 seconds. I have added this step to test Asynchronous Data Page Functionality.
Posted: 5 years ago
Posted: 5 May 2017 20:44 EDT
Susan Liu (SusanLiu_GCS) PEGA Senior Principal Engineer, Technical Support, Runtime Engine
Pegasystems Inc.
US
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Hi Srinivas,

Your Step 3, "Connect-Wait', has an empty WaitSeconds. 

Can you put a value there? 

Thanks,

Susan

 
Posted: 5 years ago
Posted: 9 May 2017 1:19 EDT
Srinivas Sarda (SSrinivas) Coforge Srinivas Sarda
Coforge
IN
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Hello Susan,

Kept seconds still not working..
My requirement is to load Data Pages Asynchronously which will avoid blocking UI.

This is what I'm trying to do.
we have 6 sections in 6 layouts (Defer Load) for each of them context page is using data page and these data pages are configured loading asynchronously using Load-Data Page.

I'm only able to perform UI actions after all of them are loaded.

Is non blocking UI concept not existing anymore in Pega 7 ?
https://docs-previous.pega.com/how-configure-non-blocking-ui-using-asynchronous-declare-pages

One more question is if we are loading Data Page asynchronously then if I use Connect-Wait then this process finally making the Data Page as Synchronous only right.Let me know if my assumption is wrong.

Thanks..!
Posted: 5 years ago
Posted: 8 May 2017 20:46 EDT
Susan Liu (SusanLiu_GCS) PEGA Senior Principal Engineer, Technical Support, Runtime Engine
Pegasystems Inc.
US
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Hi, 

In the tracer, if you don't see the Data Page to be loaded, please try to do a data page cleanup - do a "flush all" on your D_Test_Async data page.

Thanks,

Susan 
Posted: 5 years ago
Posted: 15 May 2017 2:11 EDT
Srikanth Suryadevara (srikanths8919) Virtusa Srikanth Suryadevara
Virtusa
NL
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Which version of pega are you using?we were using 7.1.7 and had same issue,raised an SR,after the hot fix installation its working.
Posted: 5 years ago
Posted: 8 Nov 2017 4:29 EST
Nikhil Bhandari (NIKUBHAN) Ai4Process Pega Principal Consultant
Ai4Process
GB
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Non blocking UI not working for me either. I have opened SR-B54349 for this. It is not working consistently even for the Pega Support team & they are looking into the issue. WIll update once SR is resolved
Posted: 5 years ago
Posted: 5 Dec 2017 0:43 EST
Swarnendu Bhattacharya (SwarnenduB9083) ME Bank Solution Engineer
ME Bank
AU
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Hello,

Did you got an update on the SR to resolve the issue to create non blocking UI. We are also having the same issue in Pega 7.2.1

Thanks.

Accepted Solution

Posted: 5 years ago
Posted: 5 Dec 2017 0:51 EST
Nikhil Bhandari (NIKUBHAN) Ai4Process Pega Principal Consultant
Ai4Process
GB
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Swarenendu, it seems to be working fine now. Please see my closing comments on the SR

"I just discovered the problem. The section had a visibility condition dependent on the Data Page itself. So that was getting fired & causing the DP to load synchronously.

I had to tweak the section & the when conditions so that the when rule doesn’t fire before the section is referred. It seems to be working fine now."

 

Please check in the tracer if your DP is loading asynchronously or not by checking ADP. Also see the word Doc I am attaching for complete details on how to achieve non blocking UI in Pega 7

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