The document describes the steps to develop a simple remote method invocation (RMI) application in Java. It includes:
1. Defining a remote interface with methods like addition, subtraction etc.
2. Implementing the interface in a class that defines the method bodies.
3. Creating a server class that binds the remote object to the registry.
4. Making a client class that looks up the remote object and calls methods.
5. Compiling the classes, running the registry, then server and client separately to test the application.
Overview of Java RMI remoting.
RMI is a lightweight Java technology that provides access to remote methods, similar to RPC, but object-oriented. RMI basically provides remote object access for a client and object registration for servers.
RMI is both a Java API (java.rmi.* package) as well as a transport protocol definition for transporting RMI calls through a network.
RMI is a Java technology since it requires that client and server objects run in a JVM (Java Virtual Machine). By using IIOP as transport protocol, however, it is possible to connect RMI-clients to non-Java server objects (e.g. CORBA).
RMI defines the elements client, server, RMI registry where servers register their services and possibly a plain vanilla web server that can be used by clients to dynamically load object classes to access servers.
This Presentation shows the working of Java RMI technology, it's advantage over RPC, it's class hierarchy API and finally implementation of Factorial program using Java RMI.
Remote Method Invocation, Distributed Programming in java, Java Distributed Programming, Network Programming in JAVA, Core Java, Introduction to RMI, Getting Started with RMI, Getting Started with Remote Method Invocation, Distributed Programming, Java, J2SE
This is all about socket programming in java using TCP and UDP socket and an example of simple Echo Server.
Also includes concepts of the socket, Socket class and methods and use of those.
Overview of Java RMI remoting.
RMI is a lightweight Java technology that provides access to remote methods, similar to RPC, but object-oriented. RMI basically provides remote object access for a client and object registration for servers.
RMI is both a Java API (java.rmi.* package) as well as a transport protocol definition for transporting RMI calls through a network.
RMI is a Java technology since it requires that client and server objects run in a JVM (Java Virtual Machine). By using IIOP as transport protocol, however, it is possible to connect RMI-clients to non-Java server objects (e.g. CORBA).
RMI defines the elements client, server, RMI registry where servers register their services and possibly a plain vanilla web server that can be used by clients to dynamically load object classes to access servers.
This Presentation shows the working of Java RMI technology, it's advantage over RPC, it's class hierarchy API and finally implementation of Factorial program using Java RMI.
Remote Method Invocation, Distributed Programming in java, Java Distributed Programming, Network Programming in JAVA, Core Java, Introduction to RMI, Getting Started with RMI, Getting Started with Remote Method Invocation, Distributed Programming, Java, J2SE
This is all about socket programming in java using TCP and UDP socket and an example of simple Echo Server.
Also includes concepts of the socket, Socket class and methods and use of those.
The presentation given at MSBTE sponsored content updating program on 'Advanced Java Programming' for Diploma Engineering teachers of Maharashtra. Venue: Guru Gobind Singh Polytechnic, Nashik
Date: 22/12/2010
Session: Java Network Programming
Web services tutorial slides from my session at DPC 2012 in Amsterdam. In this 3-hour session we built the simplest possible service, and then extended it, looking at RPC, REST and SOAP along the way.
Recently The Java Remote Method Invocation (RMI) system allows an object running in one Java virtual machine to invoke methods on an object running in another Java virtual machine. RMI provides for remote communication between programs written in the Java programming language.
The presentation given at MSBTE sponsored content updating program on 'Advanced Java Programming' for Diploma Engineering teachers of Maharashtra. Venue: Guru Gobind Singh Polytechnic, Nashik
Date: 22/12/2010
Session: Java Network Programming
Web services tutorial slides from my session at DPC 2012 in Amsterdam. In this 3-hour session we built the simplest possible service, and then extended it, looking at RPC, REST and SOAP along the way.
Recently The Java Remote Method Invocation (RMI) system allows an object running in one Java virtual machine to invoke methods on an object running in another Java virtual machine. RMI provides for remote communication between programs written in the Java programming language.
Network programming in java - PPT with Easy Programs and examples of Java InetAddress Class and java socket programming example.
Learn more @ http://java2all.com/technology/network-programming
This presentation introduces basic concepts about the Java Remote Method Invocation, a.k.a. RMI. These slides introduce the following concepts:
- Remote interfaces
- Dynamic code loading
- Serialization
- Security manager
- Exporting remote objects
- Compiling and running RMI programs
- Distributed garbage collection
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
The RMI Java Remote Method Invocation Application Programming Interface (API), or Java RMI, is a Java API that performs the object-oriented equivalent of remote procedure calls (RPC), with support for direct transfer of serialized Java objects and distributed garbage collection.
The original implementation depends on Java Virtual Machine (JVM) class representation mechanisms and it thus only supports making calls from one JVM to another. The protocol underlying this Java-only implementation is known as Java Remote Method Protocol (JRMP).
• In order to support code running in a non-JVM context, a CORBA version was later developed.
• In order to support code running in a non-JVM context, a CORBA version was later developed.
Java Hibernate Programming with Architecture Diagram and Examplekamal kotecha
Java Hibernate Introduction, Architecture and Example with step by step guidance to run the program especially for students and teachers.
Learn More @ http://java2all.com/technology/hibernate
Overview of EJB technology.
Enterprise Java Beans (EJB) is a server-side component technology for Java EE based systems (JEE).
Beans are business logic components that implement a standard interface through which the bean is hooked into the bean container (= runtime object for bean).
A Java class implementing one of the standard bean interfaces is an Enterprise Java Bean. Beans can be accessed remotely, usually from a client tier.
The EJB standard was developed to provide a common framework for solving recurring problems in business application development like persistence, transactions,
security and runtime and lifecycle management. The EJB standard evolved greatly over time. EJB version 1 and 2 were complex and required to implement many interfaces
and exception handling in EJBs. EJB version 3 brought great simplifications and did away with interfaces by replacing these with annotations which provide greater flexibility while keeping complexity low. EJBs come in 3 different flavors: Stateless and stateful session beans and message driven beans. Entity beans of EJB version 1 and 2 were replaced by the Java Persistence API in EJB version 3.
This is an introduction into distributed computing using Java Remote Method Invocation (RMI) technology. RMI allows java applications to communicate to server or distributed applications across the network seamlessly. RMI can leverage proprietary protocols or standard CORBA IIOP protocol to send/receive messages. The presentation covered the following topics.
Presentation
------------
Session Outline:
- Overview of RMI
- Features of RMI
- Layers in RMI
- Creating an application
- Conclusion
Example code available at ChrisMatthews.us
Author: Chris Matthews
Copyright: eLink Business Innovations 2002
If you have an access to an object on a different machine,
you can call methods of the remote object.of course, the method parameters must somehow be shipped to the other machine,the server must be informed to execute the method & the return value must be shipped back.
In RMI, the object whose methods makes the remote call is called the client object. The remote object is called the server object.The computer running the java code that calls the remote method is the client for that call.
The computer hosting the object that processes the call is the server for that call.
Please look at the attach See.doc. I am getting this error all th.docxrandymartin91030
Please look at the attach: See.doc. I am getting this error all the time
4
Lecture 1
The Socket API
For Chapter 4 of your second textbook
You need to read your book and practice the exercises. This is just an extra note for the chapter.
Read this lecture after you have read chapter 4 of your second textbook.
Note: I included extra file for those students who do not have SSH on their Windows.
Introduction
For the first part of the semester we study distributed programming. The programs are in Java. You can either use windows (XP, Vista, 7), and/or Linux. I assume you have a good knowledge in Java. However if you need tutorial in this language I can post or email my tutorial. But this tutorial is rather sizeable and may take a lot of your time. We use eclipse. I have a small tutorial about installing Java, eclipse, a couple of simple java programs to help you to trace a Java program using the debugging facilities of eclipse.
As always I try to clarify the subject by small programs rather than the big programs in the book to make it easier to follow.
Note: A good website on sockets is: http://docs.oracle.com/javase/tutorial/networking/TOC.html
4.1 Background
Through this part we like to have access to 2-3 computers. Let us assume a client program would like to request implementation of a task via a number server programs. I suggest having one server program in your Windows operating system and one in your account in our school server. Below are a couple of simple examples. I explain the APIs later. Just run those to make sure things are under control.
Example 1: In the following program the client asks a server to add numbers 5 and 7.
The server program:
import java.io.*;
import java.net.*;
publicclass MyServer {
publicstaticvoid main(String[] args) throws IOException {
ServerSocket serverSocket = null;
try {//Keep this number. For the pace server this is the number we must use.
serverSocket = new ServerSocket(16790);
Socket clientSocket = null;
clientSocket = serverSocket.accept();
PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
out.println("5 + 7 is: 12");
out.close();
clientSocket.close();
serverSocket.close();
} catch (IOException e) {
System.out.println("Error: " + e);
System.exit(0);
}
}
}
The client program:
import java.io.*;
import java.net.*;
publicclass MyClient {
publicstaticvoid main(String[] args) throws IOException {
Socket clientSocket = null;
BufferedReader in = null;
int ip;
try {//Keep this number. For the pace server this is the number we must use.
ip = 16790;
InetAddress host = InetAddress.getByName("localhost");//("vulcan.seidenberg.pace.edu");
clientSocket = new Socket(host, ip);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String s = in.readLine();
while(s != null){
System.out.println(s);
s = in.readLine();
}
i.
ppt of class and methods in java,recursion in java,nested class,java,command line argument,method overloading,call by value,call by reference,constructor overloading core java ppt
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
4. CLICK HERE for step by step learning with
description of each step
To run program of RMI in java is quite
difficult, Here I am going to give you four
different programs in RMI to add two integer
numbers.
First program is for declare a method in an
interface.
Second Program is for implementing this
method and logic.
Third program is for server side.
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5. And last one is for client side.
At the last I will give steps to run this
program in one system.
Calculator.java
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Calculator extends Remote
{
public long add(long a,long b) throws RemoteException;
}
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7. CalculatorServer.java
import java.rmi.Naming;
public class CalculatorServer
{
CalculatorServer()
{
try
{
Calculator c = new CalculatorImpl();
Naming.rebind("rmi://127.0.0.1:1099/CalculatorService", c);
}
catch (Exception e)
{
e.printStackTrace();
}
}
public static void main(String[] args)
{
new CalculatorServer();
}
}
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8. CalculatorClient.java
import java.rmi.Naming;
public class CalculatorClient
{
public static void main(String[] args)
{
try
{
Calculator c = (Calculator) Naming.lookup("//127.0.0.1:1099/CalculatorService");
System.out.println("addition : "+c.add(10, 15));
}
catch (Exception e)
{
System.out.println(e);
}
}
}
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9. Steps to run this programs:
First of all put these four programs inside
bin folder of JDK.
As an example suppose our JDK folder is
inside java folder in drive D:
Now open command prompt and do
following steps.
Cd
d:
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10. cd Javajdk1.6.0_23bin
javac Calculator.java
javac CalculatorImpl.java
javac CalculatorServer.java
javac CalculatorClient.java
rmic CalculatorImpl
start rmiregistry
java CalculatorServer
open another cmd and again go to same path
d:Javajdk1.6.0_23bin
java CalculatorClient
Output:
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14. RMI example - code in java -application:
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15. Steps for Developing the RMI Application:
(1) Define the remote interface
(2) Define the class and implement the remote
interface(methods) in this class
(3) Define the Server side class
(4) Define the Client side class
(5) Compile the all four source(java) files
(6) Generate the Stub/Skeleton class by command
(7) Start the RMI remote Registry
(8) Run the Server side class
(9) Run the Client side class(at another JVM)
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16. (1) Define the remote interface:
This is an interface in which we are declaring the
methods as per our logic and further these methods
will be called using RMI.
Here we create a simple calculator application
by RMI so in that we need four methods such as
addition, subtraction, multiplication and division as
per logic.
so create an interface name Calculator.java and
declare these methods without body as per the
requirement of a simple calculator RMI application.
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17. Calculator.java:
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Calculator extends Remote
{
public long addition(long a,long b) throws RemoteException;
public long subtraction(long a,long b) throws RemoteException;
public long multiplication(long a,long b) throws RemoteException;
public long division(long a,long b) throws RemoteException;
}
Note:
We must extends the Remote interface because
this interface will be called remotely in between the
client and server.
Note:
The RemoteException is an exception that can
occur when a failure occur in the RMI process.http://www.java2all.com
18. (2) Define the class and implement the remote
interface(methods) in this class:
The next step is to implement the interface so
define a class(CalculatorImpl.java) and implements
the interface(Calculator.java) so now in the class we
must define the body of those methods(addition,
subtraction, multiplication, division) as per the logic
requirement in the RMI application(Simple
Calculator).
This class run on the remote server.
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19. CalculatorImpl.java:
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
public class CalculatorImpl extends UnicastRemoteObject implements Calculator
{
protected CalculatorImpl() throws RemoteException
{
super();
}
public long addition(long a, long b) throws RemoteException
{
return a+b;
}
public long subtraction(long a, long b) throws RemoteException
{
return a-b;
}
public long multiplication(long a, long b) throws RemoteException
{
return a*b;
}
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20. public long division(long a, long b) throws RemoteException
{
return a/b;
}
public long addition(long a, long b) throws RemoteException
{
return a+b;
}
}
Note:
The UnicastRemoteObject is a base class for
most user-defined remote objects. The general form of
this class is, Public class UnicastRemoteObject
extends RemoteServer
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24. import java.rmi.Naming;
public class CalculatorServer
{
CalculatorServer()
{
try
{
Calculator c = new CalculatorImpl();
Naming.rebind("rmi://localhost:1099/CalculatorService", c);
}
catch (Exception e)
{
System.out.println(“Exception is : ”+e);
}
}
public static void main(String[] args)
{
new CalculatorServer();
}
}
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25. (4) Define the Client side class:
To access an object remotely by client side that
is already bind at a server side by one reference URL
we use the lookup method which has one argument
that is a same reference URL as already applied at
server side class.
This lookup method is a method of the Naming
class which is available in the java.rmi.* package.
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27. CalculatorClient.java:
import java.rmi.Naming;
public class CalculatorClient
{
public static void main(String[] args)
{
try
{
Calculator c = (Calculator) Naming.lookup("//127.0.0.1:1099/CalculatorService");
System.out.println("Addition : "+c.addition(10,5));
System.out.println("Subtraction : "+c.subtraction(10,5));
System.out.println("Multiplication :"+c.multiplication(10,5));
System.out.println("Division : "+c. division(10,5));
}
catch (Exception e)
{
System.out.println(“Exception is : ”+e);
}
}
}
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28. (5) Compile the all four source(java) files:
javac Calculator.java
javac CalculatorImpl.java
javac CalculatorClient.java
javac CalculatorServer.java
After compiled, in the folder we can see the four class
files such as
Calculator.class
CalculatorImpl.class
CalculatorClient.class
CalculatorServer.class http://www.java2all.com
29. (6) Generate the Stub/Skeleton class by command:
There is a command rmic by which we can
generate a Stub/Skeleton class.
Syntax:
rmic class_name
Here the class_name is a java file in which the
all methods are defined so in this application the class
name is CalculatorImpl.java file.
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31. (8) Run the Server side class:
Now you need to run the RMI Server class.
Here CalculatorServer.java file is a working as a
Server so run this fie.
Java CalculatorServer
(9) Run the Client side class(at another JVM):
Now open a new command prompt for the client
because current command prompt working as a server
and finally run the RMI client class.
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33. NOTE:
For compile or run all the file from command
prompt and also use the different commands like
javac, java, start, rmic etc you need to set the class
path or copy all the java files in bin folder of JDK.
CLICK HERE for simple addition program of RMI in
java
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