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One of the places where I worked, we did this by using JMS to send messages
when an object was updated to other servers using TopLink.  When they got the
message, they flushed the object out-of-the cache.  It actually worked pretty
well, and I've got the start of a variation of that concept that I want to use
with Castor. Of course, you cannot currently remove objects from a castor
cache, so it will have to wait.

It is a nice feature...

On 28-Sep-2001 James Higginbotham wrote:
> I have seen a this problem solved in TopLink by using a multicast
> approach, where each instance of Toplink sends an event to all other
> instances with the PK and type (or similiar event data) of the data
> modified. Whenever a retrieve of the data is requested, the particular
> record is known to be dirty and a refresh is made. 
>  
> Maybe this is a feature best suited to a "commercial grade" version of
> castor, or by someone with a lot of time to write and debug this logic.
>:) Its a nice feature, but one that is rare even in commercial packages
> outside of TopLink.


Virtually, 
Ned Wolpert <[EMAIL PROTECTED]>

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