How do I implement RMI using the computers connected in the same network?

Question

I tried implementing RMI concept using the two computers connected in my company network. I binded the remote object using my ip address and specific port number. Everything worked fine when I tried it in my local machine.

Now In order to access it from the other computer I shared the Adder (extends Remote ) interface .class file with the other computer and a client code. When I tried to access it it throwed the ClassNotFoundException: stub not found.

So I shared the stub.class file which is generated after running the command >> rmic AddImpl. After that it worked fine on the remote computer also.

Now My question is, Is that how RMI is implemented ? Do we need to share both the Adder interface and the stub class file generated in order for a client to access our remote method ?

Below are My classes and interfaces:

interface Adder extends Remote
class AddImpl extends UnicastRemoteObject implements Adder
class Server
class Client

score 0 · Answer 1 · edited May 23 '17 at 12:22

0

You need to share 3 files Adder.class, Adder.java, AdderRemote_Stub.class (not the java code)

Let us assume you have compiled already

create two different directories
launch 3 command prompt
set first 2 command prompt for the first directory (server)

Example: c:\rmiserver

put all files here
set last 1 command prompt for the second directory (client)

Example: c:\rmiclient

put the client specific files, stub and remote here
(optional) set CLASSPATH=. in all command prompt

this will allow the current directory files to be recognized in CLASSPATH
important: run rmiregistry command within the command prompt where the server .class files are in CLASSPATH

run rmiregistry 5000 command in the any of the first 2 command prompt

keep it running
run your server "java MyServer" in the remaining command prompt of the first 2
run you client "java MyClient" in the last command prompt which is a different directory

if this is is working then your network logic will work

Duplicate java.rmi.ServerException: RemoteException occurred in server thread (ClassNotFoundException)

edited May 23 '17 at 12:22

Community

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answered Jun 10 '15 at 13:55

Dickens A S

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Yes my logic works just fine for network also. I was asking " is that how RMI can be achieved ( by sharing adder , stub files ) ? " – KarthickN Jun 10 '15 at 14:07
You don't need to share Adder.java. Two files. – user207421 Jun 10 '15 at 19:36
Yeah I understand. Just wanted to confirm is that how it can be done. Thank you :) – KarthickN Jun 11 '15 at 04:58
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that is how RMI works using stub and skel, it is a mutual understanding that the machine A and B will have an extra file distributed for communication and object serialization – Dickens A S Jun 12 '15 at 13:36
Yeah I understand. Thank you :) – KarthickN Jun 16 '15 at 11:17

How do I implement RMI using the computers connected in the same network?

1 Answers1