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Posted to users@wicket.apache.org by Nazaret Kazarian <na...@gmail.com> on 2011/11/18 11:53:53 UTC

Ajax busy indicator getting stuck

Hi,

I have added a global ajax indicator to all my pages by having all
pages (through a TemplatePage superclass) implement the
IAjaxIndicatorAware interface.

Generally it works, but I have noticed that it is quite easy to get
the ajax indicator stuck spinning indefinitely, by issuing many ajax
calls quickly the one after the other. For example if I press an ajax
button multiple times quickly the busy indicator gets stuck.
It seems as if the Wicket.show(hide)Incrementally js functions lose
count of ajax requests and the busy indicator is never actually
hidden.

Has anyone encountered this problem?

Thanks a lot

Naz

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Re: Ajax busy indicator getting stuck

Posted by Nazaret Kazarian <na...@gmail.com>.
Martin,

WICKET-4071 is not involved as I am not using AjaxIndicatorAppender in any way.





2011/11/18 Nazaret Kazarian <na...@gmail.com>:
> I'm sorry I forgot to mention that I am using version 1.4.19
>
> With a little reverse engineering I noticed that maybe one of the
> cases this happens is this: an ajax button is pressed,
> showIncrementally is executed, but the actual ajax request is
> postponed because its channel is busy. When the time comes to actually
> execute the request, the request is stopped because of precondition
> check, and thus hideIncrementally is never called. This loses the
> count. A fix might be to call hideIncrementally when the ajax request
> precondition is not met. As to why the precondition is not met, I am
> guessing it's because the previous ajax request did DOM replacement in
> a way that the precondition of the queued request is no longer met.
>
>
>
>
> 2011/11/18 Ernesto Reinaldo Barreiro <re...@gmail.com>:
>> Martin,
>>
>> Before switching to 1.5.3 I was working with 1.5.x trunk and I think
>> it was the same there... but I can´t say that assertion is 100% true.
>>
>> As said in my case this happens to me on a modal window because my
>> indicator panel blocks the UI and that blocking div is behind the
>> modal. It should not be very difficult to produce a quick-start for
>> this issue (I guess).
>>
>> Best regards,
>>
>> Ernesto
>>
>> On Fri, Nov 18, 2011 at 12:02 PM, Martin Grigorov <mg...@apache.org> wrote:
>>> On Fri, Nov 18, 2011 at 12:59 PM, Ernesto Reinaldo Barreiro
>>> <re...@gmail.com> wrote:
>>>> I have also noticed that with 1.5.3... I normally block the page with
>>>> div to prevent this but for links on a modal window it happens to me
>>>> (because blocking div is behind modal).
>>>
>>> And you didn't experience this with 1.5.2 ?
>>> Maybe https://issues.apache.org/jira/browse/WICKET-4071 is involved ?
>>>
>>>>
>>>> Regards,
>>>>
>>>> Ernesto
>>>>
>>>> On Fri, Nov 18, 2011 at 11:53 AM, Nazaret Kazarian
>>>> <na...@gmail.com> wrote:
>>>>> Hi,
>>>>>
>>>>> I have added a global ajax indicator to all my pages by having all
>>>>> pages (through a TemplatePage superclass) implement the
>>>>> IAjaxIndicatorAware interface.
>>>>>
>>>>> Generally it works, but I have noticed that it is quite easy to get
>>>>> the ajax indicator stuck spinning indefinitely, by issuing many ajax
>>>>> calls quickly the one after the other. For example if I press an ajax
>>>>> button multiple times quickly the busy indicator gets stuck.
>>>>> It seems as if the Wicket.show(hide)Incrementally js functions lose
>>>>> count of ajax requests and the busy indicator is never actually
>>>>> hidden.
>>>>>
>>>>> Has anyone encountered this problem?
>>>>>
>>>>> Thanks a lot
>>>>>
>>>>> Naz
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>>
>>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Martin Grigorov
>>> jWeekend
>>> Training, Consulting, Development
>>> http://jWeekend.com
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>

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Re: Ajax busy indicator getting stuck

Posted by Nazaret Kazarian <na...@gmail.com>.
I'm sorry I forgot to mention that I am using version 1.4.19

With a little reverse engineering I noticed that maybe one of the
cases this happens is this: an ajax button is pressed,
showIncrementally is executed, but the actual ajax request is
postponed because its channel is busy. When the time comes to actually
execute the request, the request is stopped because of precondition
check, and thus hideIncrementally is never called. This loses the
count. A fix might be to call hideIncrementally when the ajax request
precondition is not met. As to why the precondition is not met, I am
guessing it's because the previous ajax request did DOM replacement in
a way that the precondition of the queued request is no longer met.




2011/11/18 Ernesto Reinaldo Barreiro <re...@gmail.com>:
> Martin,
>
> Before switching to 1.5.3 I was working with 1.5.x trunk and I think
> it was the same there... but I can´t say that assertion is 100% true.
>
> As said in my case this happens to me on a modal window because my
> indicator panel blocks the UI and that blocking div is behind the
> modal. It should not be very difficult to produce a quick-start for
> this issue (I guess).
>
> Best regards,
>
> Ernesto
>
> On Fri, Nov 18, 2011 at 12:02 PM, Martin Grigorov <mg...@apache.org> wrote:
>> On Fri, Nov 18, 2011 at 12:59 PM, Ernesto Reinaldo Barreiro
>> <re...@gmail.com> wrote:
>>> I have also noticed that with 1.5.3... I normally block the page with
>>> div to prevent this but for links on a modal window it happens to me
>>> (because blocking div is behind modal).
>>
>> And you didn't experience this with 1.5.2 ?
>> Maybe https://issues.apache.org/jira/browse/WICKET-4071 is involved ?
>>
>>>
>>> Regards,
>>>
>>> Ernesto
>>>
>>> On Fri, Nov 18, 2011 at 11:53 AM, Nazaret Kazarian
>>> <na...@gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I have added a global ajax indicator to all my pages by having all
>>>> pages (through a TemplatePage superclass) implement the
>>>> IAjaxIndicatorAware interface.
>>>>
>>>> Generally it works, but I have noticed that it is quite easy to get
>>>> the ajax indicator stuck spinning indefinitely, by issuing many ajax
>>>> calls quickly the one after the other. For example if I press an ajax
>>>> button multiple times quickly the busy indicator gets stuck.
>>>> It seems as if the Wicket.show(hide)Incrementally js functions lose
>>>> count of ajax requests and the busy indicator is never actually
>>>> hidden.
>>>>
>>>> Has anyone encountered this problem?
>>>>
>>>> Thanks a lot
>>>>
>>>> Naz
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>>
>>
>> --
>> Martin Grigorov
>> jWeekend
>> Training, Consulting, Development
>> http://jWeekend.com
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

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Re: Ajax busy indicator getting stuck

Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Martin,

Before switching to 1.5.3 I was working with 1.5.x trunk and I think
it was the same there... but I can´t say that assertion is 100% true.

As said in my case this happens to me on a modal window because my
indicator panel blocks the UI and that blocking div is behind the
modal. It should not be very difficult to produce a quick-start for
this issue (I guess).

Best regards,

Ernesto

On Fri, Nov 18, 2011 at 12:02 PM, Martin Grigorov <mg...@apache.org> wrote:
> On Fri, Nov 18, 2011 at 12:59 PM, Ernesto Reinaldo Barreiro
> <re...@gmail.com> wrote:
>> I have also noticed that with 1.5.3... I normally block the page with
>> div to prevent this but for links on a modal window it happens to me
>> (because blocking div is behind modal).
>
> And you didn't experience this with 1.5.2 ?
> Maybe https://issues.apache.org/jira/browse/WICKET-4071 is involved ?
>
>>
>> Regards,
>>
>> Ernesto
>>
>> On Fri, Nov 18, 2011 at 11:53 AM, Nazaret Kazarian
>> <na...@gmail.com> wrote:
>>> Hi,
>>>
>>> I have added a global ajax indicator to all my pages by having all
>>> pages (through a TemplatePage superclass) implement the
>>> IAjaxIndicatorAware interface.
>>>
>>> Generally it works, but I have noticed that it is quite easy to get
>>> the ajax indicator stuck spinning indefinitely, by issuing many ajax
>>> calls quickly the one after the other. For example if I press an ajax
>>> button multiple times quickly the busy indicator gets stuck.
>>> It seems as if the Wicket.show(hide)Incrementally js functions lose
>>> count of ajax requests and the busy indicator is never actually
>>> hidden.
>>>
>>> Has anyone encountered this problem?
>>>
>>> Thanks a lot
>>>
>>> Naz
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
>
>
> --
> Martin Grigorov
> jWeekend
> Training, Consulting, Development
> http://jWeekend.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

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Re: Ajax busy indicator getting stuck

Posted by Martin Grigorov <mg...@apache.org>.
On Fri, Nov 18, 2011 at 12:59 PM, Ernesto Reinaldo Barreiro
<re...@gmail.com> wrote:
> I have also noticed that with 1.5.3... I normally block the page with
> div to prevent this but for links on a modal window it happens to me
> (because blocking div is behind modal).

And you didn't experience this with 1.5.2 ?
Maybe https://issues.apache.org/jira/browse/WICKET-4071 is involved ?

>
> Regards,
>
> Ernesto
>
> On Fri, Nov 18, 2011 at 11:53 AM, Nazaret Kazarian
> <na...@gmail.com> wrote:
>> Hi,
>>
>> I have added a global ajax indicator to all my pages by having all
>> pages (through a TemplatePage superclass) implement the
>> IAjaxIndicatorAware interface.
>>
>> Generally it works, but I have noticed that it is quite easy to get
>> the ajax indicator stuck spinning indefinitely, by issuing many ajax
>> calls quickly the one after the other. For example if I press an ajax
>> button multiple times quickly the busy indicator gets stuck.
>> It seems as if the Wicket.show(hide)Incrementally js functions lose
>> count of ajax requests and the busy indicator is never actually
>> hidden.
>>
>> Has anyone encountered this problem?
>>
>> Thanks a lot
>>
>> Naz
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>



-- 
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com

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Re: Ajax busy indicator getting stuck

Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
I have also noticed that with 1.5.3... I normally block the page with
div to prevent this but for links on a modal window it happens to me
(because blocking div is behind modal).

Regards,

Ernesto

On Fri, Nov 18, 2011 at 11:53 AM, Nazaret Kazarian
<na...@gmail.com> wrote:
> Hi,
>
> I have added a global ajax indicator to all my pages by having all
> pages (through a TemplatePage superclass) implement the
> IAjaxIndicatorAware interface.
>
> Generally it works, but I have noticed that it is quite easy to get
> the ajax indicator stuck spinning indefinitely, by issuing many ajax
> calls quickly the one after the other. For example if I press an ajax
> button multiple times quickly the busy indicator gets stuck.
> It seems as if the Wicket.show(hide)Incrementally js functions lose
> count of ajax requests and the busy indicator is never actually
> hidden.
>
> Has anyone encountered this problem?
>
> Thanks a lot
>
> Naz
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

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Re: Ajax busy indicator getting stuck

Posted by Nazaret Kazarian <na...@gmail.com>.
Created WICKET-4257 with quickstart.



2011/11/19 Igor Vaynberg <ig...@gmail.com>:
> that might work.
>
> -igor
>
> On Fri, Nov 18, 2011 at 1:45 PM, Nazaret Kazarian
> <na...@gmail.com> wrote:
>> Yep, I will create a quickstart and create a jira.
>>
>> If it turns out to be a bug, until it gets solved, I am thinking of
>> showing / hiding the busy indicator using js pre/post call handlers.
>> And maybe also use the following code as a condition in post call
>> handler to hide the indicator:
>>
>>        wicketAjaxBusy: function() {
>>            for (var c in Wicket.channelManager.channels) {
>>                if (Wicket.channelManager.channels[c].busy) {
>>                    return true;
>>                }
>>            }
>>            return false;
>>        }
>>
>> Do you think that's a good idea?
>>
>>
>> 2011/11/18 Igor Vaynberg <ig...@gmail.com>:
>>> quickstart, jira?
>>>
>>> -igor
>>>
>>> On Fri, Nov 18, 2011 at 1:20 PM, Nazaret Kazarian
>>> <na...@gmail.com> wrote:
>>>> That sounds reasonable. According to the scenario I described above,
>>>> the indicator will always get stuck if you use channel type Drop and
>>>> issue an ajax request on a busy channel.
>>>>
>>>>
>>>>
>>>> 2011/11/18 coincoinfou <ol...@gmail.com>:
>>>>> Same problem with IndicatingAjaxLink when I switch to AjaxChannel.Type.DROP
>>>>>
>>>>> --
>>>>> View this message in context: http://apache-wicket.1842946.n4.nabble.com/Ajax-busy-indicator-getting-stuck-tp4082837p4083026.html
>>>>> Sent from the Users forum mailing list archive at Nabble.com.
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>>
>>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
> ---------------------------------------------------------------------
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>
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Re: Ajax busy indicator getting stuck

Posted by Igor Vaynberg <ig...@gmail.com>.
that might work.

-igor

On Fri, Nov 18, 2011 at 1:45 PM, Nazaret Kazarian
<na...@gmail.com> wrote:
> Yep, I will create a quickstart and create a jira.
>
> If it turns out to be a bug, until it gets solved, I am thinking of
> showing / hiding the busy indicator using js pre/post call handlers.
> And maybe also use the following code as a condition in post call
> handler to hide the indicator:
>
>        wicketAjaxBusy: function() {
>            for (var c in Wicket.channelManager.channels) {
>                if (Wicket.channelManager.channels[c].busy) {
>                    return true;
>                }
>            }
>            return false;
>        }
>
> Do you think that's a good idea?
>
>
> 2011/11/18 Igor Vaynberg <ig...@gmail.com>:
>> quickstart, jira?
>>
>> -igor
>>
>> On Fri, Nov 18, 2011 at 1:20 PM, Nazaret Kazarian
>> <na...@gmail.com> wrote:
>>> That sounds reasonable. According to the scenario I described above,
>>> the indicator will always get stuck if you use channel type Drop and
>>> issue an ajax request on a busy channel.
>>>
>>>
>>>
>>> 2011/11/18 coincoinfou <ol...@gmail.com>:
>>>> Same problem with IndicatingAjaxLink when I switch to AjaxChannel.Type.DROP
>>>>
>>>> --
>>>> View this message in context: http://apache-wicket.1842946.n4.nabble.com/Ajax-busy-indicator-getting-stuck-tp4082837p4083026.html
>>>> Sent from the Users forum mailing list archive at Nabble.com.
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
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Re: Ajax busy indicator getting stuck

Posted by Nazaret Kazarian <na...@gmail.com>.
Yep, I will create a quickstart and create a jira.

If it turns out to be a bug, until it gets solved, I am thinking of
showing / hiding the busy indicator using js pre/post call handlers.
And maybe also use the following code as a condition in post call
handler to hide the indicator:

	wicketAjaxBusy: function() {
	    for (var c in Wicket.channelManager.channels) {
	        if (Wicket.channelManager.channels[c].busy) {
	            return true;
	        }
	    }
	    return false;
	}

Do you think that's a good idea?


2011/11/18 Igor Vaynberg <ig...@gmail.com>:
> quickstart, jira?
>
> -igor
>
> On Fri, Nov 18, 2011 at 1:20 PM, Nazaret Kazarian
> <na...@gmail.com> wrote:
>> That sounds reasonable. According to the scenario I described above,
>> the indicator will always get stuck if you use channel type Drop and
>> issue an ajax request on a busy channel.
>>
>>
>>
>> 2011/11/18 coincoinfou <ol...@gmail.com>:
>>> Same problem with IndicatingAjaxLink when I switch to AjaxChannel.Type.DROP
>>>
>>> --
>>> View this message in context: http://apache-wicket.1842946.n4.nabble.com/Ajax-busy-indicator-getting-stuck-tp4082837p4083026.html
>>> Sent from the Users forum mailing list archive at Nabble.com.
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
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Re: Ajax busy indicator getting stuck

Posted by Igor Vaynberg <ig...@gmail.com>.
quickstart, jira?

-igor

On Fri, Nov 18, 2011 at 1:20 PM, Nazaret Kazarian
<na...@gmail.com> wrote:
> That sounds reasonable. According to the scenario I described above,
> the indicator will always get stuck if you use channel type Drop and
> issue an ajax request on a busy channel.
>
>
>
> 2011/11/18 coincoinfou <ol...@gmail.com>:
>> Same problem with IndicatingAjaxLink when I switch to AjaxChannel.Type.DROP
>>
>> --
>> View this message in context: http://apache-wicket.1842946.n4.nabble.com/Ajax-busy-indicator-getting-stuck-tp4082837p4083026.html
>> Sent from the Users forum mailing list archive at Nabble.com.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
> ---------------------------------------------------------------------
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>
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Re: Ajax busy indicator getting stuck

Posted by Nazaret Kazarian <na...@gmail.com>.
That sounds reasonable. According to the scenario I described above,
the indicator will always get stuck if you use channel type Drop and
issue an ajax request on a busy channel.



2011/11/18 coincoinfou <ol...@gmail.com>:
> Same problem with IndicatingAjaxLink when I switch to AjaxChannel.Type.DROP
>
> --
> View this message in context: http://apache-wicket.1842946.n4.nabble.com/Ajax-busy-indicator-getting-stuck-tp4082837p4083026.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>

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Re: Ajax busy indicator getting stuck

Posted by coincoinfou <ol...@gmail.com>.
Same problem with IndicatingAjaxLink when I switch to AjaxChannel.Type.DROP

--
View this message in context: http://apache-wicket.1842946.n4.nabble.com/Ajax-busy-indicator-getting-stuck-tp4082837p4083026.html
Sent from the Users forum mailing list archive at Nabble.com.

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