Re: NPE when trying to contribute ServletContextSymbolProvider to SymbolSource (WAS: Re: Page pool hard limit and page instance usage)

Thu, 25 Sep 2008 00:02:20 -0700 

This is starting to look more and more like Jira issue? Any new info on this?

 -99


Ulrich Stärk wrote:
> 
> I even removed the RequestFilter, AppligationGlobals.getServletContext()
> still returns null.
> 
> Uli
> 
> Am Di, 23.09.2008, 14:42, schrieb Peter Stavrinides:
>> This seems to be the same bug that existed a while bug, change your
>> RequestFilter to a Dispatcher and see if it works.
>>
>> ----- Original Message -----
>> From: "Ulrich Stärk" <[EMAIL PROTECTED]>
>> To: "Tapestry users" <users@tapestry.apache.org>
>> Sent: Tuesday, 23 September, 2008 2:15:18 PM GMT +02:00 Athens, Beirut,
>> Bucharest, Istanbul
>> Subject: Re: NPE when trying to contribute ServletContextSymbolProvider
>> to
>>  SymbolSource (WAS: Re: Page pool hard limit and page instance usage)
>>
>> Yes, I am.
>>
>> Uli
>>
>> Am Di, 23.09.2008, 13:00, schrieb Peter Stavrinides:
>>> Ulrich are you using a RequestFilter?
>>>
>>>
>>> ----- Original Message -----
>>> From: "Peter Stavrinides" <[EMAIL PROTECTED]>
>>> To: "Tapestry users" <users@tapestry.apache.org>
>>> Sent: Tuesday, 23 September, 2008 1:45:49 PM GMT +02:00 Athens, Beirut,
>>> Bucharest, Istanbul
>>> Subject: Re: NPE when trying to contribute ServletContextSymbolProvider
>>> to
>>> SymbolSource (WAS: Re: Page pool hard limit and page instance usage)
>>>
>>> I have looked at this a little more and it seems it is indeed a bug, I
>>> get
>>> a similar problem with code that works in the previous release.
>>>
>>> ----- Original Message -----
>>> From: "Ulrich Stärk" <[EMAIL PROTECTED]>
>>> To: "Tapestry users" <users@tapestry.apache.org>
>>> Sent: Tuesday, 23 September, 2008 11:22:30 AM GMT +02:00 Athens, Beirut,
>>> Bucharest, Istanbul
>>> Subject: Re: NPE when trying to contribute ServletContextSymbolProvider
>>> to
>>>   SymbolSource (WAS: Re: Page pool hard limit and page instance usage)
>>>
>>> I'm not sure if we are doing everything right. I hoped to hear something
>>> from Howard or someone else who knows the matter before opening an issue
>>> on this.
>>>
>>> Cheers,
>>>
>>> Uli
>>>
>>> Am Di, 23.09.2008, 07:47, schrieb 9902468:
>>>>
>>>> Should I add Jira about this?
>>>>
>>>> After all, it is pretty pointless to have this symbol provider if it
>>>> can't
>>>> work. (Perhaps there is some way to overcome this problem?)
>>>>
>>>>  - 99
>>>>
>>>>
>>>> Ulrich Stärk wrote:
>>>>>
>>>>> A Filter is passed a FilterConfig object where you can call
>>>>> getServletContext() and get the ServletContext. So the availability
>>>>> shouldn't be a problem. I rather believe that it doesn't get set in
>>>>> ApplicationGlobals until a certain point which is after building the
>>>>> SymbolSource...
>>>>>
>>>>> Uli
>>>>>
>>>>> Am Mo, 22.09.2008, 16:01, schrieb Peter Stavrinides:
>>>>>> Just a wild guess, but it sounds like an 'order of things' type
>>>>>> problem,
>>>>>> Tapestry being a filter and not essentially a servlet, the context
>>>>>> might
>>>>>> not be available at that point.
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: "Ulrich Stärk" <[EMAIL PROTECTED]>
>>>>>> To: "Tapestry users" <users@tapestry.apache.org>
>>>>>> Sent: Monday, 22 September, 2008 4:51:23 PM GMT +02:00 Athens,
>>>>>> Beirut,
>>>>>> Bucharest, Istanbul
>>>>>> Subject: NPE when trying to contribute ServletContextSymbolProvider
>>>>>> to
>>>>>> SymbolSource (WAS: Re: Page pool hard limit and page instance usage)
>>>>>>
>>>>>> The problem seems to be, that the ServletContext provided by
>>>>>> ApplicationGlobals is null when Tapestry tries to contribute the
>>>>>> ServletContextSymbolProvider to the SymbolSource service. I don't
>>>>>> know
>>>>>> why
>>>>>> this is the case. Maybe someone else can shed some light on this.
>>>>>>
>>>>>> Uli
>>>>>>
>>>>>> Am Mo, 22.09.2008, 08:08, schrieb 9902468:
>>>>>>>
>>>>>>> Hi again,
>>>>>>>
>>>>>>> I'm hitting my head to wall here with ServletContextSymbolProvider.
>>>>>>> It
>>>>>>> is
>>>>>>> configured like this:
>>>>>>>
>>>>>>> public static void
>>>>>>> contributeSymbolSource(OrderedConfiguration<SymbolProvider>
>>>>>>> configuration,
>>>>>>> @InjectService("ServletContextSymbolProvider") SymbolProvider
>>>>>>> servletContextSymbolProvider)
>>>>>>>     {
>>>>>>>         configuration.add("ServletContextSymbolProvider" ,
>>>>>>> servletContextSymbolProvider, "after:SystemProperties",
>>>>>>> "before:ApplicationDefaults");
>>>>>>>     }
>>>>>>>
>>>>>>>     public static ServletContextSymbolProvider
>>>>>>> buildServletContextSymbolProvider(ApplicationGlobals globals){
>>>>>>>         return new
>>>>>>> ServletContextSymbolProvider(globals.getServletContext());
>>>>>>>     }
>>>>>>>
>>>>>>> And it always ends to this error:
>>>>>>> java.lang.RuntimeException: Unable to instantiate class
>>>>>>> org.apache.tapestry5.services.TapestryModule as a module builder:
>>>>>>> Exception
>>>>>>> constructing service 'Alias': Error invoking service builder method
>>>>>>> org.apache.tapestry5.services.TapestryModule.buildAlias(Logger,
>>>>>>> String,
>>>>>>> AliasManager, Collection) (at TapestryModule.java:217) (for service
>>>>>>> 'Alias'): Exception constructing service 'SymbolSource': Error
>>>>>>> invoking
>>>>>>> constructor
>>>>>>> o
>>>>>
>>>>>
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>>>>>
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