Server Implementation

Listing 9.3 CustomServerImpl.java (Complete server code)

import java.rmi.*;
import java.rmi.server.*;
import java.util.*;

//server implementation
public class CustomServerImpl extends 
	UnicastRemoteObject 
	implements CustomInterface{
	
	//constructor		
	public CustomServerImpl()
		throws RemoteException{
		System.out.println("Creating Server Object");
	}
	
	//remote method used to get a list of products
	public Vector getList()
		throws RemoteException{
		String [] list = {"Computer","Bike",
		"Television","Music system"};
		Vector v = new Vector();
		for(int i=0;i<list.length;i++){
		    v.add(list[i]);
		}
		return v;
	}
	
	//remote method used to submit information
	public String submit(Customer cm)
		throws RemoteException{
	 String custName = "Name: ";
	 custName += cm.getName()+"\n";
	 String custAge = "Age: ";
	 custAge += cm.getAge()+"\n";
	 String item = "Item bought: ";
	 item += cm.getItem()+"\n";
	 String custInfo = custName + custAge + item;
	 custInfo+="Thanks for buying.";
	 return custInfo;
	} 
	
	//main method
	public static void main(String args[]){
	    try{
		//Remote object
		CustomInterface obj = new CustomServerImpl();
				
		//bind the specified name to a new remote object. 
		Naming.rebind("Server",	obj);
		System.out.println("Server ready");
		}catch(Exception ex){
	   	  System.out.println("Error: "+ex.getMessage());
		}
	 }
}

Explanation

The getList() method stores all the items sold by the company in an array, then it creates a vector and adds all the items in the array to that vector. The method returns the vector created. The Vector class implements the Serializable interface, so it can be passed from one JVM to another JVM.

The submit() method extracts information stored in the Customer object. It returns a string containing information about the customer and adds a small message to it.