Re: RMI in java

Tom Anderson <>
Tue, 1 Sep 2009 22:15:20 +0100
On Tue, 1 Sep 2009, david wrote:

I have a server and a set of clients connected to the server to perform
a certain task, using RMI. when a client performs an operation, the
server needs to update other clients (actually all clients) about the
operation, so that all the clients would have the latest information
about the task. now my question is..

i)how will the server update all the clients when actually the operation
is invoked(through the RMI object in the server) by one client.

Should the server 'act' like a client and try to update every client
using an RMI objects exported in the clients' side?

This would be the most straightforward way to do it, yes.

another question related to the serialization when passing the object
over the RMI call,

if i have a class which is something like 'public class MySerialObject
implements Serializable' ii)ok.lets say I pass one of the object
(instance of )of MySerialObject as the response for the RMI call from
the client. Do I have to do anything on the client side to deserialize
the object??? (in socket I would need to explicitly marshalling and

No, RMI will take care of this for you.

I have just started reading about RMI since 3-4days ago. and I am not
very good at Java programming either, as i am a C/C++ developer. just
curious, since i have done a lot of socket programming, I feel that RMI
looks easy to implement, especially in this kind of requirement,for
which multiple clients connected to a single server to do a collective
task.(correct me if m wrong, pls)

You're not wrong, RMI makes this quite easy.

I put together a little demo, just to make sure that my memory was right:

Just put all that in a directory somewhere, run the build script, then run
the server script, and as many copies of the client script as you like,
passing each a name. If you're not on unix, read the scripts to see what
you need to do.


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