Brian Lough wrote:
> Right on.  So imagine Snoopy's fist shake to the sky after being
> perforated by the Red Baron (Hibernate). . . ;-)
>
> You're dealing with alot of code layers, and potentially a data issue
> here (one instance you are trying to query could be represented
> in the schema just differently enough to cause this error).
This is occurring in a development environment on a fresh and small app
with a schema with a total of 6 mapped entities, 7 tables, 3 records in
the abstract entity's table, one user (me), and all queries working
completely normally in the context of pages. I can't say it's impossible
for this to be a data issue, but the odds of that are miniscule.
> Personally, I start with HibernateUtils unit tests to verify Hibernate
> and my
> low-level code first, then move to TapestryIOC outside the container
> to test the services for T5 use I've coded up, then the T5 pages: I don't
> do Hibernate in Dispatchers.  Again, too many layers changing
> underneath (no offense to anyone, just the way it is): plus, I code for
> multi-frameworks.
>
> Point issue: I got nuthin', except intuition screams session cache
> hold-over (Hibernate thinks you're asking for two distinct instances
> but with the
> same persistent id).  Architectural curiosity: why load in a
> dispatcher and what benefit is there?
As it turns out it doesn't make sense for what I'm writing (a binary
file dispatcher), but when I ran into this I was struck with a bolt of
"I must understand this." A realistic use however is access control, in
which you want to restrict T5-specific idioms like a "page" or "component."
>
>
> Chris Lewis wrote:
>> Padawn,
>>
>> Per your suggestion I tried the get method with the exact same results:
>>
>> Listing listing = (Listing)session.get(Listing.class,
>> Long.parseLong(sListingId));
>>
>> I also changed the dispatcher so that it uses the
>> HibernateSessionManager to get the current session explicitly on each
>> request, to no avail. I fell like something simple is evading me. My
>> dispatcher fires before the page render dispatcher, does its thing, and
>> then returns true (if handled) like any other one. Do I need to do any
>> manual hibernate cleanup? I thought this was handled by a background
>> event but I'm at a bit of a loss...
>>
>> thanks again for all the input
>>
>> snoopy dance made me laugh :-D
>>
>> Padawn wrote:
>>  
>>> Since it's just my intuition speaking, I may be off-base, but...this
>>> sounds
>>> like the beloved Hibernate Proxy and/or Cache issue, both of which
>>> SnoopyDance all-over gray concurrency areas.  Try substituting the
>>> query
>>> code for a, literally, straight get(persistentClass, databaseId);
>>> call and
>>> see if the issue is still there.  Bit of a performance it, but
>>> better to sweat that later.
>>>       
>>
>>   
>

-- 
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