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From "Jan Lendholt" <jlendh...@hotmail.com>
Subject Re: Optimistic locking seems not to work
Date Sun, 29 Jul 2007 19:02:51 GMT
Hey Folks,

thanks for your help - problem is solved - after unchecking the remote 
notification all works as expected.

Regards, Jan


>From: "Jan Lendholt" <jlendholt@hotmail.com>
>Reply-To: user@cayenne.apache.org
>To: user@cayenne.apache.org
>Subject: Re: Optimistic locking seems not to work
>Date: Sat, 28 Jul 2007 12:27:07 +0000
>
>Hi Michael,
>
>no, I did not enable the remote notifications. Neither ist 
>Container-Managed Transactions.
>But Object-Validation und Use Shared Cache is enabled.
>
>Does this have any influence on my problem?
>
>Thanks, Jan
>
>
>>From: "Michael Gentry" <blacknext@gmail.com>
>>Reply-To: user@cayenne.apache.org
>>To: user@cayenne.apache.org
>>Subject: Re: Optimistic locking seems not to work
>>Date: Sat, 28 Jul 2007 07:44:52 -0400
>>
>>Hi Jan,
>>
>>When you configured your Data Domain in the Modeler, did you enable
>>Remote Change Notifications under the Cache Configuration?
>>
>>Thanks,
>>
>>/dev/mrg
>>
>>
>>On 7/28/07, Jan Lendholt <jlendholt@hotmail.com> wrote:
>> > Hey Folks,
>> >
>> > I'm using Cayenne now for 2 weeks and I'm still in my playground-phase 
>>to
>> > check out the whole functionality of this leight-weighted, but yet easy 
>>to
>> > use framework.
>> >
>> > Ok, here's my problem:
>> >
>> > I created a table storing a custimer id (KID), a name (name) and a 
>>status
>> > (status).
>> > This table has one recordset with kid=2133.
>> >
>> > Now I start up my (Swing) application and create two instances of this
>> > application.
>> > Ok, I have got two buttons - one button is getting the object "Kunde" 
>>(Kunde
>> > = Customer, german) and the other button modifies via the setter 
>>setName and
>> > send the modification with commitChanges().
>> >
>> > Well, now I am quite astonished: When I load my object in instance one 
>>then
>> > load my object in instance two and afterwards hit den button in 
>>instance 1
>> > to modify & save the changes Cayenne sets an update:
>> >
>> > INFO  QueryLogger: UPDATE ACCESS.KUNDE SET NAME = ? WHERE KID = ? AND 
>>NAME =
>> > ?
>> > INFO  QueryLogger: [bind: 'Test 1', 2133, 'Test']
>> >
>> > This is correct and works as expected.
>> >
>> > Now I hit the Modify & Save button in stance 2. i would expect that the
>> > statement would look like:
>> >
>> > INFO  QueryLogger: UPDATE ACCESS.KUNDE SET NAME = ? WHERE KID = ? AND 
>>NAME =
>> > ?
>> > INFO  QueryLogger: [bind: 'Test 2', 2133, 'Test']
>> >
>> > And because no row is affected/the row has been modified in the 
>>meantime I
>> > would cayenne expect to raise an exception.
>> >
>> > But instead I get the following queries:
>> >
>> > INFO  QueryLogger: UPDATE ACCESS.KUNDE SET NAME = ? WHERE KID = ? AND 
>>NAME =
>> > ?
>> > INFO  QueryLogger: [bind: 'Test 2', 2133, 'Test 1']
>> >
>> > Where did cayenne get the new value for name which has been set just a 
>>few
>> > seconds before? Shouldn't cayene raise an excepption?
>> >
>> > In the modeler I checked the optimist locking checkbox and checked the
>> > name-attribute to be used for optimistic locking and all references.
>> >
>> > Maybe one could help me, I really do not understand when cayenne is 
>>about to
>> > raise an exception for optimist locked tables.
>> >
>> > Thanks in advance & best regards form Hamburg/Germany,
>> >
>> > Jan
>> >
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>
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