So my understanding from this is that it does not provide automatic failover as in the
case of stateless beans. That is when you invoke a method on the entity remote object
an exception will be generated if the server is down. The application programmer must
handle that condition by doing another findByPrimarykey on the home object. How can
you tell that a RemoteException is caused by a server failure?
I would like to see automatic failoever provided by the entity bean.
dan
Eyal Hirsch wrote:
> Hi Dan,
> <vendor>
> Take a look at the following address for how Inprise in
> Inprise Application Server 4 implements what you need :
>
>http://www.borland.com/devsupport/appserver/faq/Availability_Scalability_Performance.html
>
> This is from the document there :
>
> Failover is supported by leveraging the Naming Service and the osagent. We support
>failover of all types of EJBs. To summarize the behavior:
>
> 2) Entity Beans. From the Container standpoint, Entity Beans are similar to
>Stateless Session Beans, except that before being able to use a replica entity, it
>needs to be loaded in. The current transaction will fail, as it should. Both the
>resource and the synchronization objects associated with the original (failed) entity
>in VM 1 will be unavailable, and the transaction manager, presuming rollback (as per
>the OTS/JTS specification) will roll back the current transaction. However,
>subsequent transactions will simply fail-over to use the replica entity in VM 2, and
>will continue correctly.
>
> </vendor>
>
> eyal.
>
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