Sun Educational Services - SL-301 Distributed Programming With Java Technology.pdf

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Distributed Programming With Java

Technology

SL-301

Student Guide

With Instructor Notes

Sun Microsystems Inc.

MS BRM01-209

500 Eldorado Blvd.

Broomﬁeld, Colorado 80021

U.S.A.

Revision C.1, March 2000

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Contents

About This Course....................................................................................

xiii

Course Goal ....................................................................................... xiii

Course Overview .............................................................................. xiv

Course Map......................................................................................... xv

Module-by-Module Overview ........................................................ xvi

Course Objectives........................................................................... xviii

Skills Gained by Module.................................................................. xix

Guidelines for Module Pacing ......................................................... xx

Topics Not Covered.......................................................................... xxi

How Prepared Are You?................................................................. xxii

Introductions .................................................................................. xxiii

How to Use Course Materials ...................................................... xxiv

Course Icons and Typographical Conventions ......................... xxvi

Icons ......................................................................................... xxvi

Typographical Conventions ................................................ xxvii

Notes to the Instructor.................................................................... xxix

Philosophy ...............................................................................xxix

Course Tools ............................................................................xxix

Instructor Setup Notes .................................................................. xxxii

Overview of Distributed Computing.....................................................1-1

Objectives ............................................................................................1-1

Relevance............................................................................................ 1-2

Additional Resources ....................................................................... 1-3

History of Computing ...................................................................... 1-4

Distributed Computing.................................................................... 1-6

Importance of Distributed Computing ..................................1-7

Characteristics of Distributed Computing ............................1-8

Design Considerations ..................................................................... 1-9

Latency........................................................................................1-9

Partial Failure ............................................................................1-9

Distributed Programming Architectures..................................... 1-11

Overview of Daemon Processes ...........................................1-12

Using Java Technologies to Implement Daemons .............1-13

iii

Third-Party Java Technologies Using Daemons ................1-15

Understanding Daemons.......................................................1-15

Overview of Remote Procedure Call ...................................1-16

Third-Party Java Technologies Using RPC .........................1-17

Understanding Remote Procedure Call (RPC) ...................1-17

Overview of Remote Objects.................................................1-18

Implementing Remote Objects With Java Technologies ...1-19

Understanding Remote Objects ............................................1-20

Overview of Object Bus Systems ..........................................1-21

JavaBeans InfoBus...................................................................1-22

Understanding Object Bus Systems .....................................1-23

Overview of Mobile Agents ..................................................1-24

Understanding Mobile Agents..............................................1-26

Supporting Technologies for Distributed Computing .............. 1-27

Naming Service .......................................................................1-28

Security Service .......................................................................1-28

Transaction Service .................................................................1-28

Event Service............................................................................1-29

Message Queueing..................................................................1-29

Supporting Technologies .......................................................1-30

Check Your Progress ...................................................................... 1-31

Think Beyond .................................................................................. 1-32

Java Database Connectivity (JDBC)

.......................................................2-1

Objectives ............................................................................................2-1

Relevance............................................................................................ 2-2

Additional Resources ....................................................................... 2-2

Introduction ....................................................................................... 2-3

JDBC Drivers and Driver Managers............................................... 2-4

java.sql

Package ............................................................................ 2-7

JDBC Flow........................................................................................ 2-10

JDBC Programmer’s Interface ....................................................... 2-11

JDBC Example .........................................................................2-12

Exercise: Compiling a JDBC Application .................................... 2-14

Preparation...............................................................................2-14

Tasks .........................................................................................2-14

Exercise Summary...................................................................2-15

Using JDBC Drivers ................................................................2-16

Exercise: Loading a Driver............................................................. 2-18

Tasks .........................................................................................2-18

Exercise Summary...................................................................2-19

Exercise: Loading Driver 2 (Optional) ......................................... 2-22

Tasks .........................................................................................2-22

Specifying a Database.............................................................2-24

NIS Name Resolution Example ............................................2-26

Opening a Database Connection ..........................................2-27

Distributed Programming With Java Technology

Exercise: Connecting to a Database.............................................. 2-29

Tasks .........................................................................................2-29

Exercise Summary...................................................................2-30

Submitting a Query ................................................................2-31

Using a Prepared Statement ..................................................2-33

Using Callable Statements .....................................................2-36

Receiving Results ....................................................................2-38

Exercise: Executing an SQL Query ............................................... 2-40

Tasks .........................................................................................2-40

Exercise Summary...................................................................2-41

JDBC Driver Architecture .............................................................. 2-44

JDBC Driver Categories .........................................................2-44

Application Designs ....................................................................... 2-46

Two-Tier Application Designs ..............................................2-46

Three-Tier Application Designs............................................2-47

Applets.............................................................................................. 2-48

Applets and Traditional Database Applications ................2-49

Performance Considerations .................................................2-49

Security Limitations................................................................2-49

Exercise: Building a JDBC Application (Optional)..................... 2-50

Preparation...............................................................................2-50

Tasks .........................................................................................2-50

Exercise Summary...................................................................2-52

More Information............................................................................ 2-53

Check Your Progress ...................................................................... 2-54

Think Beyond .................................................................................. 2-55

Remote Method Invocation (RMI)

.........................................................3-1

Objectives ............................................................................................3-1

Relevance............................................................................................ 3-2

Additional Resources ....................................................................... 3-4

What Is Java RMI?.....................................................................3-5

RMI Characteristics...................................................................3-7

RMI Application Architecture.................................................3-9

What Is Serialization? .............................................................3-10

Object Serialization Architecture ..........................................3-12

Writing and Reading to and from an Object Stream .........3-13

Object Streams .........................................................................3-16

The

Externalizable

Interface.............................................3-18

Exercise: Serialization..................................................................... 3-19

Tasks .........................................................................................3-19

Exercise Summary...................................................................3-21

Creating an RMI Application ........................................................ 3-22

Steps to Create an RMI Application.....................................3-23

Deploying an RMI Application.............................................3-29

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