rmiregistry and server

[Zhaozhe Ruan]

could anyone tell me if i can start the server without run rmiregistry first?

i wanna start the server with "localhost" "port"
but if I rum "rmiregistry 1024", i could only assign the "port" 1024, or I can not start the server

[Edwin Dalorzo]

Use LocateRegistry.createRegistry(int port) method.

For instance, this codes creates a new RMIRegistry, and registers a Server object with it:

Registry registry = LocateRegistry.createRegistry(9090);
Server server = new ServerImpl(database);
Server stub = (Server) UnicastRemoteObject.exportObject(server);
registry.bind("suncertify.server.Server", stub);

To shut down the RMI registry, I unexport the registry object.

UnicastRemoteObject.unexportObject(registry, true);
System.exit(0);

I hope this helps!

[Oricio Ocle]

You can export multiple remote objects in the same port.

Regards

[Zhaozhe Ruan]

I've tried your way, but when I try to connect from client to server, connection was refused, could you give me some suggestions?

thanks

[Daniel Bryant]

Hi Zhaozhe,

In answer to your original question, if I understand correctly, what you want to do is start the RMI registry using a user-defined port number?

If this is the case I would recommend displaying a GUI to the user (created and displayed by an object i.e. ApplicationRunner.java with a main method that is not the server and does not require RMI to be running) and then ask for the appropriate information (url, port), and only then do you need to start the registry and instantiate your server object using the GUI object.

Best wishes,

Daniel

[Edwin Dalorzo]

Zhaozhe, comrade.

The answer to your last question is fairly evident. If you create the RMIRegistry and bind your objects and you simply let your program finish then your server dies.

You have to make sure your application will not die until you want so.
For instance (this is just for an example), put System.read() at the end of your server initilization code, so that your server dies until you press enter.

Registry registry = LocateRegistry.createRegistry(9090);
Server server = new ServerImpl(database);
Server stub = (Server) UnicastRemoteObject.exportObject(server);
registry.bind("suncertify.server.Server", stub);
System.read();
//shut dow code goes here

Evidently you will have to provide some way to the end user to shut down the server when he wants.

This will require a shutdown strategy in order that any pendant transaction is completed before the server dies, and no further transactions should be accepted while the server is shutting down.

I hope this helps!