Problem running Naming.rebind in RMI

[Mark O' Sullivan]

Hi,
I'm having problems running a demo class to test my network connectivity with RMI. The start of the main method is like this.

LocateRegistry.createRegistry(1095);
Naming.rebind("HotelReservator",new HotelReservationImpl("C:\\JavaAssignment\\db-1x2.db")) 

Getting error like this.
"Exception in thread "main" java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused: connect"
Main error from stack trace:
"at sun.rmi.registry.RegistryImpl_Stub.rebind"
I thought the problem was that the HotelReservationImpl_Stub.class could not be found but I have manually created this in the classes directory so I presume it should be picked up.
Any ideas here?
Thanks.

[Roel De Nijs]

Hi Mark,

This is the code I used to register my service:

        Registry registry = LocateRegistry.createRegistry(port);
        registry.rebind("MyService", UnicastRemoteObject.exportObject(new MyServiceImpl(dbPath), 0));

Maybe you could try it like that.

Are you working on a linux machine? If it still doesn't work, maybe posting full stacktrace could point out the problem. Anyway don't create stub-class manually: from JDK 5 this is done automatically, so no need to create it yourself.

Kind regards,
Roel

[Mark O' Sullivan]

Cheers, thanks for that.
I orginally had this.

LocateRegistry.createRegistry(1093);
Naming.rebind("HotelReservator",new HotelReservationImpl("C:\\JavaAssignment\\db-1x2.db"));

and following Roel's kind suggestion changed it to:

Registry registry = LocateRegistry.createRegistry(1091);
registry.rebind("HotelReservator",UnicastRemoteObject.exportObject(new HotelReservationImpl("C:\\JavaAssignment\\db-1x2.db",0)))

I also had therefore to change the code to retrieve the object from

HotelReservationDBRemote hotelReservation = (HotelReservationDBRemote) Naming.lookup("HotelReservator");

to

Registry registry = LocateRegistry.getRegistry(1091);
HotelReservation hotelReservation = (HotelReservationDBRemote)registry.lookup("HotelReservator");

Clearly also had to remove the UnicastRemoteObject defintion from the HotelReservationImpl class as well.
Thanks the help and if anyone could explain the different between the 2 methods?

[Roel De Nijs]

Hi Mark,

I think it would have worked with just extending from UnicastRemoteObject (and so not using exportObject-function) too.

registry.rebind("HotelReservator", new HotelReservationImpl("C:\\JavaAssignment\\db-1x2.db"));

But I used the exportObject-method because in Java you have no multiple inheritance, so if you already extend from UnicastRemoteObject you can't extend anymore from another class.

Why it doesn't work with the Naming.rebind() I don't have an idea.

Kind regards,
Roel