Re: Ajax request, ERXRedirect and ERXThreadStorage

[Jean-François Veillette]

On Jul 12, 2016, at 8:52 AM, Paul Hoadley  wrote:Hello,I’m working on an app where some page-level informational messages (such as validation problems) are stored in ERXThreadStorage, and displayed by the page wrapper. This works great for full page loads.In a few places, I’m doing some Ajax submissions with AjaxSubmitButton. In the usual case, nothing goes wrong and an AjaxUpdateContainer displays some new information. I figured that a reasonable way to display validation errors from these Ajax submissions would be to stash the messages in ERXThreadStorage in the usual way, and then use ERXRedirect and its setComponentToPage() to just force a full page reload. This all works except (critically) the _retrieval_ of the messages from ERXThreadStorage—there’s nothing there. Is this expected?It is expected.  The redirect is in fact a new request sent from the browser, it gets queued and processes by a different thread.  Even if you are lucky and get the same thread, the thread storage dictionary info will be fresh and empty (as for any new request). Is the invocation of the action method by the Ajax submission on a different thread?Yes, and with that pattern, the validation information is no longer thread bound but is now multi-request (imagine .css, .js or .jpg requests) bound … or simply session bound.Maybe you can keep it in a « session’s last request validation info object » and clear it at the start of a full-page request.jfv-- Paul Hoadleyhttp://logicsquad.net/


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Re: Ajax request, ERXRedirect and ERXThreadStorage

[Paul Hoadley]

On 13 Jul 2016, at 1:28 AM, Lon Varscsak  wrote:

> I believe the the thread storage is reset for each request, and the Ajax 
> request and the redirect are two different requests.

That would explain it. Thanks Lon.


-- 
Paul Hoadley
http://logicsquad.net/




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Re: Ajax request, ERXRedirect and ERXThreadStorage

[Paul Hoadley]

On 13 Jul 2016, at 1:41 AM, Chuck Hill  wrote:

> As long as you have more than one worker thread, there is no guarantee which 
> will process which request.

I logged out the thread names, and that didn’t seem to be the problem. The same 
worker thread was involved from the Ajax action through to sending out the 
re-direct.

> Do you have a session you can stash it in?

Yeah, that’s my workaround. It’s awkward, though, because the single R-R 
lifespan of ERXThreadStorage is just perfect for this use case. In fact, I end 
up moving the informational messages into ERXThreadStorage at some point just 
to ensure they disappear at the right time (because they shouldn’t persist into 
the next R-R, they’re just for one-off display). I couldn’t seem to simulate it 
just using the session.


-- 
Paul Hoadley
http://logicsquad.net/



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Re: Ajax request, ERXRedirect and ERXThreadStorage

[Chuck Hill]

As long as you have more than one worker thread, there is no guarantee which 
will process which request.  Do you have a session you can stash it in?

Chuck

From: <webobjects-dev-bounces+chill=gevityinc@lists.apple.com> on behalf of 
Lon Varscsak <lon.varsc...@gmail.com>
Date: Tuesday, July 12, 2016 at 8:58 AM
To: Paul Hoadley <pa...@logicsquad.net>
Cc: WebObjects-Dev <webobjects-dev@lists.apple.com>
Subject: Re: Ajax request, ERXRedirect and ERXThreadStorage

I believe the the thread storage is reset for each request, and the Ajax 
request and the redirect are two different requests.

On Mon, Jul 11, 2016 at 11:52 PM, Paul Hoadley 
<pa...@logicsquad.net<mailto:pa...@logicsquad.net>> wrote:
Hello,

I’m working on an app where some page-level informational messages (such as 
validation problems) are stored in ERXThreadStorage, and displayed by the page 
wrapper. This works great for full page loads.

In a few places, I’m doing some Ajax submissions with AjaxSubmitButton. In the 
usual case, nothing goes wrong and an AjaxUpdateContainer displays some new 
information. I figured that a reasonable way to display validation errors from 
these Ajax submissions would be to stash the messages in ERXThreadStorage in 
the usual way, and then use ERXRedirect and its setComponentToPage() to just 
force a full page reload. This all works except (critically) the _retrieval_ of 
the messages from ERXThreadStorage—there’s nothing there. Is this expected? Is 
the invocation of the action method by the Ajax submission on a different 
thread?


--
Paul Hoadley
http://logicsquad.net/





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Re: Ajax request, ERXRedirect and ERXThreadStorage

[Lon Varscsak]

I believe the the thread storage is reset for each request, and the Ajax
request and the redirect are two different requests.

On Mon, Jul 11, 2016 at 11:52 PM, Paul Hoadley  wrote:

> Hello,
>
> I’m working on an app where some page-level informational messages (such
> as validation problems) are stored in ERXThreadStorage, and displayed by
> the page wrapper. This works great for full page loads.
>
> In a few places, I’m doing some Ajax submissions with AjaxSubmitButton. In
> the usual case, nothing goes wrong and an AjaxUpdateContainer displays some
> new information. I figured that a reasonable way to display validation
> errors from these Ajax submissions would be to stash the messages in
> ERXThreadStorage in the usual way, and then use ERXRedirect and
> its setComponentToPage() to just force a full page reload. This all works
> except (critically) the _retrieval_ of the messages from
> ERXThreadStorage—there’s nothing there. Is this expected? Is the invocation
> of the action method by the Ajax submission on a different thread?
>
>
> --
> Paul Hoadley
> http://logicsquad.net/
>
>
>
>
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>
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Ajax request, ERXRedirect and ERXThreadStorage

[Paul Hoadley]

Hello,

I’m working on an app where some page-level informational messages (such as 
validation problems) are stored in ERXThreadStorage, and displayed by the page 
wrapper. This works great for full page loads.

In a few places, I’m doing some Ajax submissions with AjaxSubmitButton. In the 
usual case, nothing goes wrong and an AjaxUpdateContainer displays some new 
information. I figured that a reasonable way to display validation errors from 
these Ajax submissions would be to stash the messages in ERXThreadStorage in 
the usual way, and then use ERXRedirect and its setComponentToPage() to just 
force a full page reload. This all works except (critically) the _retrieval_ of 
the messages from ERXThreadStorage—there’s nothing there. Is this expected? Is 
the invocation of the action method by the Ajax submission on a different 
thread?


-- 
Paul Hoadley
http://logicsquad.net/



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