If you don't mind my asking, and without giving away any proprietary
secrets, how is this done? ;-) Synchronous messaging? Shared file system
cache?
Gene
----- Original Message -----
From: "Jonathan K. Weedon" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, April 05, 2001 12:08 PM
Subject: Re: EJB 1.1 and change of primary key values
> Gene Chuang wrote:
> >
> > Are there any containers vendors that have successfully implemented
> > pessimistic locking in a cluster?
>
> Gene,
>
> Yes, Borland AppServer 4.5.x provides pessimistic locking in a
> clustered configuration, when using CMP. (From what I understand,
> IBM's forthcoming EJB 1.1 product also has the similar capabilities.)
>
> I also might note that in CMP we also enforce the rule that primary
> keys are immutable. That is, if an attempt is made to modify a
> PK value after the ejbCreate method, an exception is thrown. This
> is forward compatible with EJB 2.0.
>
> -jkw
>
>
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