CS 4448 - Fall 1998
Object-Oriented Programming and Design
Talk 12.4
by
Tony R. Martinez

JAVA REMOTE METHOD INVOCATION-DISTRIBUTED COMPUTING FOR JAVA

by

JAVA.SUN.COM

• Introduction
  Java Remote Method Invocation(RMI).
  • Allows you to write distributed objects in Java.
  
  
  • Embraces the "Write Once, Run Anywhere" model.
  
  
  • Brings safety and portability to distributed computing.
  
  
  • Connects to legacy systems via JNI and JDBC.
  
  


• Advantages
  Java RMI is a simple abstraction for programming distributed systems having the following advantages:
  • Object Oriented.
  
  
  • passes full objects as arguments and return values
  
  
  • no extra code
  
  
  • Mobile Behavior.
  
  
  • move behavior: client-server, server-client
  
  
  • Design Patterns.
  
  
  • full power of of OO methodology:polymorphism
  
  
  • Security.
  
  
  • RMI uses Java's built in security mechanisms
  
  
  • Easy to Write/Easy to use.
  
  
  • rapid prototyping and deployment
  
  
  • Connects To Existing/Legacy Systems.
  
  
  • using JDBC and JNI
  
  
  • Write Once, Run Anywhere.
  
  
  • 100% portable to any Java Virtual Machine
  
  
  • Distributed Garbage Collection.
  
  
  • feature of remote server objects
  
  
  • Parallel Computing.
  
  
  • multi-threaded, servers can exploit Java threads
  
  
  • The Java Distributed Computing Solution.
  
  
  • core Java platform starting with JDK 1.1
  
  
  • all Java systems talk the same public protocol
  
  
  • no protocol translation overhead
  
  
  
  


• RMI ARCHITECTURE Four Layer Model
  • Layer I - Application Layer
  
  
  • Layer II - Proxy Layer
  
  
  • Layer III - Remote Reference Layer
  
  
  • Layer IV - Transport Layer
  
  


• SUMMARY
  
  • RMI provides a solid platform for truly object-oriented computing
  
  
  • RMI connects to Existing/Legacy systems
  
  
  • Advantages of Java-Java
  
  
  • no porting, low maintenance, security