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From "Schaefer, Dirk Alexander" <dirk.a.schae...@bluewin.ch>
Subject Re: tiles2 crashes (digester)
Date Mon, 27 Aug 2007 12:01:11 GMT
hi,

done. please see https://issues.apache.org/struts/browse/TILES-204

greez,

dirk

----- Original Message ----- 
From: "Antonio Petrelli" <antonio.petrelli@gmail.com>
To: <users@tiles.apache.org>
Sent: Monday, August 27, 2007 1:36 PM
Subject: Re: tiles2 crashes (digester)


> 2007/8/27, Schaefer, Dirk Alexander <dirk.a.schaefer@bluewin.ch>:
>>
>> hello all,
>>
>> this is a following up to the email sent before.
>>
>> i spend a bit more time in investigating the problem and found the
>> following.
>>
>> consider the following: tile is initialized using the
>> org.apache.tiles.definition.UrlDefinitionsFactory.
>>
>> now, when a request receives and the tiles container is instructed to
>> render
>> a specific tiles definition, the following happens (the interessing
>> parts):
>>
>>     1. invoke 'Definition getDefinition(String name, TilesRequestContext
>> tilesContext)' of UrlDefinitionFactory.
>>     2. from there invoke 'Definitions getDefinitions()' of
>> UrlDefinitionFactory.
>>     3. if the instance attribute 'definitions' is null, from there invoke
>> 'Definitions readDefinitions()' of UrlDefinitionFactory.
>>
>> within the third call the configuration is actually parsed and the
>> beans/instances/what ever defined within the configuration file(s) ar
>> created.
>> unfortunatelly the UrlDefinitionFactory does not synchronize the call to
>> the
>> 'Definitions readDefinitions()' method. the result is, if there are
>> multiple request received by the servlet container at once and there has
>> no
>> other request been received so long, we get into classical multi
>> threading problematics where each thread is bothering the others and the
>> process of creating the definitions list crashs.
>>
>> i think this is where's the rub.
>>
>> can anyone confirm this?
>
>
>
> Great analysis Dirk! Can you open a JIRA issue for this?
>
> Thanks
> Antonio
> 


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