[jira] Commented: (COCOON-1812) Javaflow and Ajax when sending two forms one after eachother

["Simone Gianni (JIRA)" <ji...@apache.org>]

    [ http://issues.apache.org/jira/browse/COCOON-1812?page=comments#action_12371778 ] 

Simone Gianni commented on COCOON-1812:
---------------------------------------

I can try to port them, but after writing in the response the javascript flow terminates and waits for the new http request to arrive. How do i do this in javaflow? Continuation.suspend() (creating a continuation that will wait for nothing)?

The other way would be to throw an exception, but while this exception would go unnoticed under tomcat and jetty, it will appear under BEA, WebSphere and other containers.

I'll try suspending the continuation.

> Javaflow and Ajax when sending two forms one after eachother
> ------------------------------------------------------------
>
>          Key: COCOON-1812
>          URL: http://issues.apache.org/jira/browse/COCOON-1812
>      Project: Cocoon
>         Type: Bug
>   Components: Blocks: Forms, Blocks: Java Flow
>     Versions: 2.1.9-dev (current SVN)
>     Reporter: Simone Gianni
>     Priority: Critical

>
> In javaflow, if I try to send an ajax form and then send another ajax form I obtain a NPE originating from JXMacroHelper.
> For example :
>   FormInstance fi = new FormInstance("myform.def.xml");
>   fi.show("mypipe");
>   fi = new FormInstance("myotherform.def.xml");
>   fi.show("myotherpipe");
> I receive an NPE originating from JXMacroHelper:162  while showing the second forms.
> After investigations i noticed that the second form was displayed following the ajax behaviour, while this second form is new and should not be "ajaxed". This causes the updatedWidgets list to be null (both in form and in JXMacroHelper) and thus the NPE.
> Sniffing the http traffic showed me that while in javascript the submission of the first form causes a <bu:continue/> and a new non-ajax request from the browser, while with javaflow this does not happen.
> Seems like the lines from 176 to 201 of /cocoon-2.1.X/src/blocks/forms/java/org/apache/cocoon/forms/flow/javascript/Form.js were not ported to the javaflow FormInstance.

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