>> > Now I start up my (Swing) application and create two instances
>> of this
>> > application.
So just to confirm - those are two separate Java Virtual Machines,
not two Swing windows running off the same VM?
>> > 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:
Is it possible that the action method that does an update and save on
the 2nd instance also does a SELECT, resulting in refreshing the
objects before commit?
Andrus
On Jul 28, 2007, at 3:27 PM, Jan Lendholt wrote:
> 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" <blacknex..mail.com>
>> Reply-To: use..ayenne.apache.org
>> To: use..ayenne.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 <jlendhol..otmail.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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This archive was generated by hypermail 2.0.0 : Sat Jul 28 2007 - 08:38:47 EDT