Rmi by Internet connection

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Rmi by Internet connection

 
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  #1
Apr 23rd, 2008
Hai Friends

Iam using RMI concept for my project, i want to connect client and server by using internet connection , but its working fine on LAN connection, it gives following Exception
Java Syntax (Toggle Plain Text) 
  1. java.lang.RuntimeException: java.rmi.ConnectException: Connection refused to hos
  2. t: 125.17.11.229; nested exception is:
  3.         java.net.ConnectException: Connection refused: connect
  4.         at Client.init(Client.java:23)
  5.         at sun.applet.AppletPanel.run(AppletPanel.java:417)
  6.         at java.lang.Thread.run(Thread.java:619)
  7. Caused by: java.rmi.ConnectException: Connection refused to host: 125.17.11.229; n
  8. ested exception is:
  9.         java.net.ConnectException: Connection refused: connect
  10.         at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
  11.         at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198
  12. )
125.17.11.229 is my internet IP

my code
Java Syntax (Toggle Plain Text) 
  1. Server:
  2. import java.rmi.registry.LocateRegistry;
  3. import java.rmi.registry.Registry;
  4. import java.rmi.server.UnicastRemoteObject;
  5.  
  6. public class Server implements RemoteInterface
  7. {
  8.  
  9.     public String getMessage()
  10.     {
  11.         return "Hello World";
  12.     }
  13.  
  14.     public static void main(String args[])
  15.     {
  16.         try
  17.         {
  18. 			String REGISTRY_NAME = "RMI_Example";
  19.     int REGISTRY_PORT = 3032;
  20.             Registry registry = LocateRegistry.getRegistry(REGISTRY_PORT);
  21.             RemoteInterface remoteReference = 
  22.                 (RemoteInterface) UnicastRemoteObject.exportObject(new Server());
  23.             registry.rebind(REGISTRY_NAME, remoteReference);
  24.         }
  25.         catch (Exception e)
  26.         {
  27.             throw new RuntimeException(e);
  28.         }
  29.     }
  30. }
  31.  
  32. Interface:
  33.  
  34. import java.rmi.Remote;
  35. import java.rmi.RemoteException;
  36.  
  37. public interface RemoteInterface extends Remote
  38. {
  39.       String getMessage() throws RemoteException;
  40. }
  41.  
  42.  
  43. client:import java.rmi.registry.LocateRegistry;
  44. import java.rmi.registry.Registry;
  45. import javax.swing.JApplet;
  46. import javax.swing.JLabel;
  47. import java.rmi.*;
  48.  
  49. public class ClientApplet 
  50. {
  51.  
  52. public static void main(String arg[]) 
  53.     {
  54. 		String REGISTRY_NAME = "RMI_Example";
  55.     int REGISTRY_PORT = 3032;
  56.  
  57.         try
  58.         {
  59.             Registry registry = 
  60.                 LocateRegistry.getRegistry("125.17.11.229",REGISTRY_PORT);
  61.             RemoteInterface remoteReference = 
  62.                 (RemoteInterface) registry.lookup(REGISTRY_NAME);
  63.            System.out.println(remoteReference.getMessage());
  64.         }
  65.         catch (Exception e)
  66.         {
  67.             throw new RuntimeException(e);
  68.         }
  69.     }
  70. }
plz help me for this problem...
Last edited by ~s.o.s~; Apr 30th, 2008 at 3:01 pm. Reason: Added code tags, learn to use them.
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Re: Rmi by Internet connection

 
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  #2
Apr 23rd, 2008
Firewall?
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Re: Rmi by Internet connection

 
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  #3
Apr 23rd, 2008
either that or the server process is bound to the local network address and therefore trying to call the process through its external address isn't going to get a response.
42
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Re: Rmi by Internet connection

 
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  #4
Apr 29th, 2008
When iam using external ip(125.17.11.232) to connect server its working fine in LAN but it gives error when iam try to run in internet connection
Exception in thread "main" java.lang.RuntimeException: java.rmi.ConnectIOExcepti
on: Exception creating connection to: 194.9.30.245 nested exception is:

In error show my server local ip 194.9.30.245 ,

coding:
Server :
Server.java

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;

public class Server implements RemoteInterface
{

public String getMessage()
{
return "Hello World";
}

public static void main(String args[])
{
try
{
String REGISTRY_NAME = "RMI_Example";
int REGISTRY_PORT = 60020;
Registry registry = LocateRegistry.getRegistry(REGISTRY_PORT);
RemoteInterface remoteReference =
(RemoteInterface) UnicastRemoteObject.exportObject(new Server());
registry.rebind(REGISTRY_NAME, remoteReference);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}
--------------------------------------
Interface
RemoteInterface.java

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface RemoteInterface extends Remote
{
String getMessage() throws RemoteException;
}
-----------------------------------------------------------
Client

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import javax.swing.JApplet;
import javax.swing.JLabel;
import java.rmi.*;

public class ClientApplet
{

public static void main(String arg[])
{
String REGISTRY_NAME = "RMI_Example";
int REGISTRY_PORT = 60020;

try
{
Registry registry =
LocateRegistry.getRegistry("125.17.11.232",REGISTRY_PORT);
RemoteInterface remoteReference =
(RemoteInterface) registry.lookup(REGISTRY_NAME);
System.out.println(remoteReference.getMessage());
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
}

Please send me solution for this problem
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Re: Rmi by Internet connection

 
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  #5
Jul 2nd, 2008
any solution for this problem...
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Re: Rmi by Internet connection

 
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  #6
Jul 2nd, 2008
Maybe, if you were to show what the nested exception is.
Java Programmer and Sun Systems Administrator

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Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
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Re: Rmi by Internet connection

 
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  #7
Jul 3rd, 2008
java.rmi.ConnectIOException: Exception creating connection to: 194.9.30.242; nested exception is:
java.net.NoRouteToHostException: No route to host: connect
this is my Exception
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Re: Rmi by Internet connection

 
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  #8
Jul 3rd, 2008
That is, seemingly, not a publicly available ip address (i.e. can't be reached from the internet, at all), or you are attempting it to access throught the wrong interface on your computer, and so have no network path to it.
Java Programmer and Sun Systems Administrator

----------------------------------------------

Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan
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Re: Rmi by Internet connection

 
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  #9
Jul 3rd, 2008
im using public ip in my client,what are the changes that i have to do in my program? in client or server program?
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