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Developing a Java/RMI Server using JRMP
Gopalan Suresh Raj

Note
To work with any of these samples, you will need the following:
.........................................JDK 1.2 (Java 2) or higher

The Steps involved in developing and deploying a Java/RMI Server using JRMP (Java Remote Method Protocol) are

1. Develop your Remote Interface
2. Implement your Java/RMI Server
3. Implement an application that creates your server
4. Develop your policy file
5. Compile the files, generate stubs & skeletons, run the RMIRegistry and startup your server

1. Develop your Remote Interface

SimpleStocks\StockMarket.java
package SimpleStocks;
import java.util.*;
import java.rmi.*;

public interface StockMarket extends java.rmi.Remote {
  float get_price( String symbol ) throws RemoteException;
}

2. Implement your Java/RMI Server

SimpleStocks\StockMarketImpl.java
/**
 * StockMarket
 */

package SimpleStocks;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;

public class StockMarketImpl
  extends UnicastRemoteObject implements StockMarket {

  public StockMarketImpl( String name ) throws RemoteException {
    try {
      Naming.rebind( name, this );
    }
    catch( Exception e ) {
      System.out.println( e );
    }
  }

  public float get_price( String symbol ) {
    float price = 0;
    for( int i = 0; i < symbol.length(); i++ ) {
      price += (int) symbol.charAt( i );
    }
    price /= 5;
    return price;
  }

}
 

3. Implement an Application that creates your Server

StockMarketServer.java
/**
 * Copyright:    Copyright (c) 1998
 * Author:       Gopalan Suresh Raj
 */

import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;

import SimpleStocks.*;

public class StockMarketServer {

  public static void main(String[] args) throws Exception {
    if(System.getSecurityManager() == null) {
      System.setSecurityManager( new RMISecurityManager() );
    }

    StockMarketImpl myObject = new StockMarketImpl( "NASDAQ" );
    System.out.println( "RMI StockMarketServer ready..." );
  }
}

4. Develop your security policy file

policy.all
grant {
 permission java.security.AllPermission "", "";
};

5. Compile the Files, generate the stubs & skeletons, startup the RMIRegistry and Run the Server


E:\MyProjects\StockRMI\SimpleStocks>
E:\MyProjects\StockRMI\SimpleStocks>javac *.java

E:\MyProjects\StockRMI\SimpleStocks>cd..

E:\MyProjects\StockRMI>rmic SimpleStocks.StockMarketImpl

E:\MyProjects\StockRMI>javac *.java

E:\MyProjects\StockRMI>start rmiregistry

E:\MyProjects\StockRMI>java -Djava.security.policy=policy.all StockMarketServer
RMI StockMarketServer ready...

 

Java/RMI
Java/RMI - Under The Hood
Developing a Java/RMI Server using JRMP
Developing a Java/RMI Client using JRMP
Developing a Java/RMI Server Component using IIOP
Developing a Java/RMI Client to our RMI/IIOP Server Component
Developing a CORBA Client to our RMI/IIOP Server Component

click here to go to
My Advanced Java/J2EE Tutorial Page...

 


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This site was developed and is maintained by Gopalan Suresh Raj

This page has been visited times since September 21,1998.

Last Updated : Dec 19, '98

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