Client Implementation

The client receives a stub and can make remote invocations through the stub. The client has no idea that the object is activatable or running as a standard UnicastRemoteObject.

The client in this example remotely invokes the sayHello() method in order to get the string "Hello World!". Here is the code:

Listing 13.4 Client.java

import java.rmi.*;
public class Client {
public static void main(String args[]) {

  //Installing a security manager
  System.setSecurityManager(new RMISecurityManager());
  try {

	 //get a reference to the remote reference 
	 LazyInterface li = 
		(LazyInterface)Naming.lookup("LazyServer");
	 System.out.println("Calling the server");

	 //calling the remote method
	 String result = (String)li.sayHello();
	 System.out.println(result);
	 
	 } catch (Exception e) {
	    System.out.println(e.getMessage());
	 }
     }
}

The client gets a reference to the remote object implementation from the server(s) rmiregistry and calls the remote method.