RMI -IIOP with an Applet
i am trying a to make simple HelloWorld applet over RMI-IIOP.. Code given as ..
//interface class
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface HelloInterface extends Remote{
String sayHello() throws RemoteException;
}
// Server implementing the interface..
import javax.rmi.PortableRemoteObject;
import java.rmi.*;
import javax.naming.*;
import java.util.Hashtable;
public class HelloServer extends PortableRemoteObject implements HelloInterface {
String Name;
public HelloServer(String name) throws RemoteException{
super();
Name=name;
}
public String sayHello() throws RemoteException {
System.out.println("Hello " + Name);
return Name;
}
public static void main(String str[]){
try{
HelloServer objHello=new HelloServer("Nitin");
Hashtable props = new Hashtable();
props.put("java.naming.factory.initial","com.sun.jndi.cosnaming.CNCtxFactory");
props.put("java.naming.provider.url","iiop://192.168.4.146:900");
Context ctx = new InitialContext(props);
ctx.rebind("objhello", objHello);
System.out.println("HEllo Server bound in registry");
}catch(Exception e){
e.printStackTrace();
}
}
}
// Hello Applet
import java.applet.Applet;
import java.awt.Graphics;
import javax.naming.*;
import java.rmi.RMISecurityManager;
import java.util.Hashtable;
import javax.rmi.PortableRemoteObject;
public class HelloApplet extends Applet {
String message=null;
public void init(){
try{
Hashtable props = new Hashtable();
props.put("java.naming.factory.initial","com.sun.jndi.cosnaming.CNCtxFactory");
props.put("java.naming.provider.url","iiop://192.168.4.146:900");
Context ctx = new InitialContext(props);
HelloInterface obj = (HelloInterface) PortableRemoteObject.narrow(ctx.lookup("objhello"),HelloInterface.class);
//obj=(HelloInterface) Naming.lookup("//" + getCodeBase().getHost() + "/objhello");
message=obj.sayHello();
}catch(Exception e){
e.printStackTrace();
}
}
public void paint(Graphics g){
g.drawString(message,25 ,50);
}
}
now while exicuting the programe
first i will run the ordb by command prompt as
c:\>start ordb -OBDInitialPort 900
then i run my hello server
which bind the object in registry..
now i run my applet programe..
after that when i run my applet programe through appletviewer it print ''Nitin''...but when i run my applet programe through hello.html
it gives an exception as
Exception in thread "Thread-6" java.security.AccessControlException: access deni
ed (java.lang.RuntimePermission modifyThread)
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:264)
at java.security.AccessController.checkPermission(AccessController.java:
427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at sun.applet.AppletSecurity.checkAccess(AppletSecurity.java:138)
at java.lang.Thread.checkAccess(Thread.java:1218)
at java.lang.Thread.setName(Thread.java:1001)
at com.sun.corba.se.impl.transport.SelectorImpl.run(SelectorImpl.java:23
9)
while i set the policy
grant {
permission java.lang.RuntimePermission "modifyThreadGroup";
permission java.lang.RuntimePermission "modifyThread";
};
in java.policy.I dont know why this exception is coming.If any budy know about that then plz help me out from this problem....
Message was edited by:
tonitin.gupta
