UMass%20Lowell%20Computer%20Science%2091.460%20Java%20and%20Distributed%20Computing%20Prof.%20Karen%20Daniels%20Fall,%202000

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UMass Lowell Computer Science 91.460 Java and
Distributed Computing Prof. Karen Daniels Fall,
2000

• Lecture 1
• Introduction/Overview
• Wed. 9/6/00

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Web Page
Web Page
http//www.cs.uml.edu/kdaniels/courses/java2000.
html
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Nature of the Course
New!

• Leading-edge technology
• Advanced undergraduate level
• CS elective
• Highly interactive lectures
• Lots of Java programming

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Prerequisites

• Computing I (91.101)
• Computing II (91.102)
• Strong C skills
• preferably from Computing III (91.201)
• Helpful experience
• Operating Systems
• Distributed Computing

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Course Structure 3 Parts

• Java fundamentals
• applets, applications, data types, control
  structures, OO programming, files
• Advanced Java concepts Java support for
  distributed computing
• GUI/events, graphics, exceptions, advanced data
  structures, threads/ multithreading, RMI
• Distributed computing using a sample Java-based
  environment
• Jini

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Textbooks

• Required
• Java How to Program, Third Edition by Deitel and
  Deitel, Prentice-Hall, 1999.
• Core Jini by W. Keith Edwards, Prentice-Hall PTR,
  1999.
• Optional
• Java 2 The Complete Reference, Third Edition, by
  Naughton and Schildt, McGraw-Hill, 1999.

Available in UML bookstore
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Syllabus
Part 1
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Syllabus (continued)
Part 2
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Syllabus (continued)
Part 3
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Important Dates

• Exam 1 Friday, 10/6
• Exam 2 Friday, 11/10
• Exam 3 TBA

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Grading

• Homework 40
• Exam 1 15 (closed book)
• Exam 2 20 (open book, notes )
• Exam 3 25 (open book, notes)

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Computing Environment

• Java 2 platform Java 2 SDK v. 1.2.2
• http//www.javasoft.com/products/jdk/1.2
• Jini v. 1.1
• http//www.javasoft.com/products/jini
• UML CS UNIX environment
• Optional
• PC environment (code must also run on UNIX)
• Experiment with jdk1.3 if you like
• Java integrated development environment
• 2 are on disk with Deitel textbook (NetBeans
  caveat)

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What is Java?

• Language developed by Sun Microsystems
• Popular use World Wide Web
• Platform-independent
• Interpreter Java Virtual Machine
• Mobile code (Applets) transient, seamless
• Fully Object-Oriented
• Many C constructs
• Class library support

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A Typical Java Environment
Deitel 99
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What is Distributed Computing?

• Distributed system collection of computing
  devices that communicate with each other
• Challenges
• heterogeneous hardware, software
• asynchrony
• limited local knowledge
• failures

Attiya, Welch 99
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Eight Fallacies of Distributed Computing
Essentially everyone, when they first build a
distributed application, makes the following
eight assumptions. All prove to be false in the
long run, and all can cause big trouble and
painful learning experiences. - Peter Deutsch

• Topology doesnt change
• There is one administrator
• Transport cost is zero
• The network is homogeneous

• The network is reliable
• Latency is zero
• Bandwidth is infinite
• The network is secure

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Why Java Distributed Computing?

• Platform independence helps with heterogeneous
  hardware, software challenge
• Built-in support for
• Multithreading concurrent multiple activities
• Client-Server computing servlets, JDBC
• Remote Method Invocation (RMI) method calls
  across network
• Networking socket-based communication views
  networking like file I/O

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Our Distributed Computing GoalManaging A
Complex Enterprise
Telecommunications
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Enterprise Characteristics

• Many participants
• hardware, software
• varied communication
• Highly distributed
• Frequent changes
• mobile clients
• service availability

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What is Jini?

• Java-based connection framework developed by Sun
  Microsystems
• Philosophy
• plug n play network
• blur distinction between hardware and software
• self-healing
• Elements discovery, lookup, leasing, remote
  events, transactions, JavaSpaces

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Background on Jini Technology
Assumes Java and network
Consists of Java classes Works at application
level
proxy manages service interaction
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Homework
HW Assigned Due Content

• 1 Wed, 9/6 Fri, 9/8 Read Ch 1 (Deitel)

First written programming assignment will be
handed out this Friday.