Re: Jini Service as local object reference

Hi Francisco,

You could also check out the custom endpoints created by Bob Scheifler:

https://user-rscheifler.dev.java.net/

You'd basically need the aggregate endpoint wrapped around a remote and
a local endpoint (also in the package).

Happy Christmas,

Dan.

Francisco Dário Mourão wrote:
> Hi there,
> 
> I’m trying to develop a service which can be configured to run as Jini
> service or to run as local object, when used by a client application.
> 
> The reason is that I want to remove the RMI overhead of a method call
> when, in a specific environment, I know that I’ll always use the service
> locally.
> 
>  
> 
> To be more specific:
> 
> I launch an environment by launching several services. For instance:
> ClientService and ServerService (ClientService acting as client of
> ServerService).
> 
> On an environment type A: I launch a ClientService on host1 and
> ServerService on host2 (Both Jini services)
> 
> On an environment type B: I launch a ClientService and ServerService on
> host1 (Both Jini services)
> 
> What I want to do is to improve performance for type B environments, by
> configuring ServerService to run as a “local service”, and thus
> eliminate the RMI overhead of ClientService to ServerService method
> calls and ServerService event invocations to ClientService.
> 
>  
> 
> When ServerService run as Jini, I’m creating a pure RMI proxy for the
> implementation:
> 
>  
> 
> serviceImplementation = *new* ServerServiceImpl(*this*);
> 
> proxy = (IService) exporter.export(serviceImplementation);
> 
>  
> 
> … where exporter is configured like this:
> 
>  
> 
> /* Exporter for the server proxy */
> 
>     exporter = new BasicJeriExporter(TcpServerEndpoint.getInstance(0),
> 
>                                      new BasicILFactory());
> 
>  
> 
>  
> 
> What should I do to have ClientService to use ServerService as if it
> were a local object reference?
> 
> At a first glance you could say that to accomplish what I want, I would
> simply have to make ServerService proxy = serviceImplementation:
> 
>  
> 
> serviceImplementation = *new* ServerServiceImpl(*this*);
> 
> proxy = (IService) serviceImplementation;
> 
>  
> 
>  
> 
> That was what I thought too. The problem is that my
> serviceImplementation is not Serializable!!!
> 
>  
> 
> Does anyone know how can I overcome this problem?
> 
> Should I implement a LocalProxy which implements Serializable? But how
> can it reference the serviceImplementation when serviceImplementation is
> not serializable?
> 
>  
> 
> Thanx for the help.
> 
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