I use Postgresql as well, but I couldn't figure out how to get container
managed entity beans to automatically set the primary key from the SEQUENCE
data type. I ended up creating a session bean to grab sequence numbers
from the database each time I created an entity bean.
Is there a better way? I'm all for it---creating two beans every time I need
one is not my idea of a good way to spend time.
--phil--
On Thu, 15 Jun 2000 08:33:58 -0400 "John M. Jones" writes
+--------------------
| Does your database support serial fields? These fields generate a counter
| for each record added. There's a trick to getting the next id when calling
| create(), but it eliviates coding a unique id generator. I use PostgreSQL,
| and it has a serial data type.
|
| Hope this helps,
| John
|
| -----Original Message-----
| From: [EMAIL PROTECTED]
| [mailto:[EMAIL PROTECTED]]On Behalf Of Blasius Lofi
| Dewanto
| Sent: Thursday, June 15, 2000 5:13 AM
| To: [EMAIL PROTECTED]
| Subject: Automatic counter
|
|
| Hi all,
|
| I just wonder, whether someone can help me...
|
| How can I implement a counter or a unique id
| for my PrimaryKey in EJB? Because I don't want
| to take care about it in my EJB.
|
| Another question:
| When I quit from the EJBServer through the JonasAdmin,
| I always get this exception:
| Cannot unbind Datasources: java.lang.ClassCastException
| Is this normal?
|
| Thank's a lot!
| --
| ---------------------------------------------------
| Blasius Lofi Dewanto
| ---------------------------------------------------
| OpenUSS - Open Source University Support System
| http://openuss.sourceforge.net
| ---------------------------------------------------
|
|
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