advanced-java-lab/rmi.tex at master · pratul/advanced-java-lab · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
\pagebreak{}
\section{Remote Method Invocation}
\subsection{Main file}
\begin{verbatim}
import java.rmi.*;

public interface Hello extends Remote {
    public String sayHello() throws RemoteException;
}
\end{verbatim}

\subsection{Impl}
\begin{verbatim}
import java.rmi.*;
import java.rmi.server.*;

public class HelloImpl extends UnicastRemoteObject implements Hello {
    public HelloImpl() throws RemoteException {
        super();
    }
    public String sayHello() throws RemoteException {
        return "welcome!";
    }
}
\end{verbatim}

\subsection{Client}
\begin{verbatim}
import java.rmi.*;

public class HelloClient {
    public static void main(String args[]) {
        try {
            Hello h = (Hello) Naming.lookup("rmi://127.0.0.1/server");
            System.out.println("Client: hello!");
            System.out.println("Server: " + h.sayHello());
        }
        catch (Exception e) {
            System.out.println("error" + e);
        }
    }
}
\end{verbatim}
\pagebreak{}
\subsection{Server}
\begin{verbatim}
import java.rmi.*;

public class HelloServer {
    public static void main(String args[]) {
        try {
            HelloImpl h = new HelloImpl();
            Naming.rebind("server",h);
            System.out.println("Object is registered");
            System.out.println("New server waiting for request...");
        }
        catch(Exception e) {
            System.out.println("error" + e);
        }
    }
}
\end{verbatim}

\section*{Output}
\begin{verbatim}
>: rmic HelloImpl

>: rmiregistry &
[1] 11819

>: java HelloServer
Object registered. New server waiting for connections...

>: java HelloClient
Client: hello!
Server: welcome!
\end{verbatim}