[ http://issues.apache.org/jira/browse/TAPESTRY-169?page=all ]
Jesse Kuhnert resolved TAPESTRY-169:
------------------------------------
Resolution: Won't Fix
Assign To: (was: Tapestry Developer List)
> Synchronization problem exists for the engine within a session
> --------------------------------------------------------------
>
> Key: TAPESTRY-169
> URL: http://issues.apache.org/jira/browse/TAPESTRY-169
> Project: Tapestry
> Type: Bug
> Components: Framework
> Versions: 3.0
> Environment: Operating System: All
> Platform: All
> Reporter: alvin shen
>
> Take an example:
> I request a page which contains a image asset. The following steps can occur
> during processing request of this page:
> 1). The framework creates a engine instance to service this request
> 2). The application stores some data into the visit object of this engine
> 3). The framework creates a session due to visit object access
> 4). The framework renders and flushes the resulting html page
> 5). The framework stores the engine into the session previously created
> 6). The framework finishes this cycle of processing
> Between step 4 and step 5 the web browser receives and parse the html page,
> and it continues to load the contained image, and the following steps will
> occur at server side:
> a). Tapestry calls getEngine() which may resulting creating a new engine
> instance, because the engine accessed in the last cycle have not yet been
> saved to this session yet.
> b). With this engine, tapestry continues to process the image request with
> AssetService
> c). At this point, step 5 of last cycle occurs and the engine accessed by
> that
> cycle is saved to this session
> d). Tapestry continues to save engine accessed this cycle to the same session
> which results in overrides the engine stored last cycle. And all visit data
> associated with the overrided engine get lost!
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