That was a pretty good explanation for a non-RMI expert! Your completely
correct.
Jim
--On Wednesday, March 07, 2001 5:16 PM +0100 Ole Husgaard <[EMAIL PROTECTED]>
wrote:
> Hi,
>
> Guy Rouillier wrote:
>> Yes, RMI is a TCP protocol. RMI over IIOP simply carries the RMI
>> protocol on top of IIOP, just like (e.g.) Microsoft can carry NetBEUI
>> traffic over TCP/IP.
>
> I do not agree here.
> (But I am not a RMI expert, and hope
> that Rickard corrects me if I am
> wrong.)
>
> In particular, RMI over IIOP is not
> just simple tunneling, as NetBEUI
> over TCP/IP.
>
> RMI is an API that you can use for
> remote object invocations.
> By default RMI uses the JRMP protocol.
> The JRMP protocol defines the wire
> encoding of the invocation requests,
> and needs a reliable full-duplex
> connection-oriented network transport
> that may or may not be encrypted and/or
> authenticated.
>
> The CORBA IIOP protocol is simply GIOP
> over a TCP transport. The GIOP protocol
> defines the wire encoding for CORBA
> invocation requests.
>
> Some things that you can do with RMI
> cannot be done with the GIOP protocol.
> This is why the RMI/IIOP subset of RMI
> was defined. When RMI is used over
> IIOP, the wire protocol is compatible
> with all other CORBA implementations
> that use IIOP. This means that your
> RMI/IIOP program can invoke methods on
> CORBA objects that are implemented in
> C++ and run on another machine with a
> CORBA implementation from another
> vendor.
>
> If RMI over IIOP just used tunneling,
> this interoperability would not be
> possible, and there would be no need
> to use the RMI/IIOP subset only.
>
>
> Best Regards,
>
> Ole Husgaard.
>
>
> --
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