Re: Food Tasting, Memory and Rolling Back Transactions.

Ok..  let me see if I understand.    Transaction starts, is written to  
disk, then the code blows up.

What happens next?    The transaction is attempted again on load.  If  
it continues to fail (deterministic or not) then I have to manually  
remove the transaction?


On Jul 27, 2009, at 3:17 PM, Justin T. Sampson wrote:

> On Mon, Jul 27, 2009 at 1:26 PM, Ross Rick<[email protected]> wrote:
>
>> So yes, I am ok with keeping the model safe from deterministic
>> errors.  My concern is an error beyond my control after the model has
>> been modified in the transaction.   As I understand it Prevayler will
>> not set the model back to the state it was in before the transaction
>> started.  I can't imagine how it could.    And now reading this I
>> understand that this is independent of food tasting.  Of course, the
>> transaction will not be serialized to disk so I can reload the model
>> to the correct state.  Since we are in an exception state I would be
>> unlikely to be able to reverse the changes made to the model anyway,
>> so a reload is really required in all cases.
>
> The transaction *is* serialized to disk. Transactions are written to
> the journal before being executed.
>
> Cheers,
> Justin
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008  
> 30-Day
> trial. Simplify your report design, integration and deployment - and  
> focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> To unsubscribe go to the end of this page: http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
> _______________________________________________
> "Databases in Memoriam" -- http://www.prevayler.org
>


------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with 
Crystal Reports now.  http://p.sf.net/sfu/bobj-july
_______________________________________________
To unsubscribe go to the end of this page: http://lists.sourceforge.net/lists/listinfo/prevayler-discussion
_______________________________________________
"Databases in Memoriam" -- http://www.prevayler.org