Introduction

This presentation will describe main aspects of a distributed system, identifying its  drivers, goals and pitfalls. After that, the  CORBA middleware will be described,  trying to answer why it was created in the first place and the problems it solves. At the end a quick comment about why we need ACS on top of CORBA.

Presentation Contents 

26 min.

• Intro Distributed Systems (5 mins)
  • Why is worth the effort? Main Drivers
  • Goals and Pitfalls
  • Communication:  RPC vs Message-oriented
• CORBA: A Distributed Object-Based System 5 min
  • Object Orientation
  • Location Transparency
  • Programming Language Neutral
• Basic CORBA Concepts: 10 min
  • Interface Definition Language and IDL Compilers
  • Language Mappings
  • Stubs and Skeleton
  • Object References
  • Object Adapter
  • Object Request Broker (ORB)
• ORBs and examples   5 min
  • ACE TAO - C++ ORB  
  • Jacorb - A java ORB
  • omniORB - a python ORB
• Ok, I understood CORBA. Why do we need ACS?  1 min