Re: many instances of Shark in one VM

Hello Roshan

you wrote:
> Hi Sasa and others,
> 
>       Is it possible to have many instances of Shark in a single Java VM
> or in JBoss? We are currently running one instance of Shark as a POJO
> library with session bean wrappers in JBoss. 
> 
>       We are looking at providing BPM(using Shark) as a hosted service
> to some of our clients. We'd like to have a different instance of Shark
> (ie. one Shark and database instance per client) for security reasons
> and also to separate the repositories etc. for each client. Running a
> separate JVM/JBoss for each instance may be too expensive and not
> scalable(?). 
> 
>      Shark does not allow you to configure more than one instance at a
> time ('Trying to configure shark instance that is already configured
> !!!'). Is there a way to start multiple instances, each with its own
> configuration(ie. different Shark.conf)? In org.enhydra.shark.Shark, we
> could make some changes to enable multiple instances, but it seems that
> such a change would also have to be made in other classes such as
> SharkEngineManager etc. 
> 	Clustering is also another concern for such a system.
> 
>      Tips and suggestions are welcome from everyone.

AFAIK it's possible to achieve this using separate class-loaders, as in
webapp class-loaders division. You should be able to have multiple
JSPClient applications inside one web server. I've just confirmed this 
by deploying sharkworklisthandler.war twice in Enhydra6.3(Tomcat5.5).

hope this helps
-- 
Vlada

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