RMI help needed

[Richard Berg]

Hi all!
Need some help with RMI:
I have an RMI server and a handful of clients. I want a new
instance of object X to be created on the server to serve each client.
X will then access a database located on the server and send query
results to the client. There MUST be one and only one instance of X for
each client! I've succeeded in creating one instance of X to serve
all clients, but I must have one for each (to keep track of the
clients).
My problem is that I don't know where to start! Would someone please
post some short example code for rhis?

[Avi Abrami]

Create a "factory" class that creates and returns instances of X. Example:


<blockquote>
<pre>
public class XFactoryImpl extends UnicastRemoteObject implements XFactory {
public static synchronized X createX() {
return new XImpl();
}
}
</pre>
</blockquote>


Remember...

• Register class XFactoryImpl


• Don't register XImpl


• Client does a lookup of XFactory and then invokes createX




Good Luck,

Avi.

[karl koch]

hi,
every client can pass its id to server. create a session object with this id. this session has a field for X.if you create session object, then you also create X. before creating a new session object you check if one exists already (perhaps store them in a hashtable). if it exists then pass back existing one, if not create new one.
in this way you only have one X per client.
would this work for you ?
karl