Universal Java Beans with DB2 from 1999, early Internet work

Universal Beans
Java and DB2
Matthew Perrins
B23

Contents
 Introduction
 Crossware
 Java
 Java Beans
 Tools
 Summary
 Demos

What is a UI for the Web
 Web Started as a mechanism to share
information
Through common protocols and standards
These standards matured to allow HTML to be defined
HTML allows the layout of visual items using a TAG based
syntax
Page design soon became an issue
 Early HTML browsers were primitive
causing content to be the main focus not design

Where are we today
 Navigator and Internet Explorer support
Java 1.1 Support
HTML 4.0
JavaScript 1.2
 Delivering cross platform support on all major GUI
platforms
Windows,MAC,OS/2,UNIX Motif
 Allowing Internet and Intranet Application development
 Still problems with complexity of Design and Development
So how can we improve what we have today

Dynamic HTML
Java 1.1
Beans Components
JavaScript
Objects
View
By Introducing CrossWare
 Presentation
 Programming
 Scripting
Three Major
Components

CrossWare User Interface Design
 Internet and Intranet Design
Sites moving more towards an application design
Content now becomes separated from Navigation
Objects can be reused creating consistency
Sites move towards navigational views bringing content to users
Visual aspects of design can be improved without need for Java
 Start Using to the Components Correctly
Leverage Internet components to simplify development
Use JavaScript to improve usability of site through easy navigation
Use Beans to deploy effect reuse, a single component can be reused
across applications

Dynamic HTML
 Key Components for Dynamic HTML
4.0 Specification
CSS 1 & CSS P
Dynamic Fonts
New Object Model
 Presentation Language
Pixel perfect positioning
Movable objects more user interaction
Move towards application design not page design
Dynamic HTML

Java 1.1
Java 1.1
 Key Components
Beans Support
JDBC
Lightweight Component Model
–Consistent GUI across platforms
 Programming allows:
Complex visual objects to be used
Supports communication with other data formats
–Including InfoBus Technology from Lotus

Java Script
 Scripting Language
Can access Cascading Style Sheet Objects
Manipulation all objects including Beans through Bean
Connect
Visual Function can be contained in Java Script Objects
allowing for reuse across applications
–Tray, ContentView, Menu , Ticker
With Dynamic HTML and JavaScript.
–Improved design can be achieved without complex
programming
The glue to hold it all together

 IBM and Java
 Why Java Beans?
 What are Java Beans?
 Demo - connecting beans
 JDBC Beans
 Demo - connecting beans to data
Introduction to Beans & DB2

 IBM's world-wide Java
Technology Centre
 Java source code guardians
for IBM
 Porting Centre
 Technology advocates
IBM's Java Efforts

 Java - The bytecode binary standard for
programs on networks
Compiles to standard 'bytecode binaries'
Runs anywhere without recompilation
Industry-wide endorsement & support
100% Pure Java ensures reusability & portability
 The IBM View
Put Java on all IBM platforms (OS/2, AIX, OS/400, MVS)
Connect Java to everything (CICS, MQ, DB2, SNA)
Get everyone to use Java!
Java

 CICS Transactions
Available now - CICS Gateway for Java
Pure Java, runs anywhere
 MQ Messaging
Under development
Joint activity with Sun
 DB2 Databases
Access via JDBC
 AS/400 Resources
AS/400 Access Toolkit
 SNA Networks
APPC access
Access to Everything

 A flexible, open, component model
 Provides a packaging unit for third party
vendors
 Easy to learn and use
 Cross-platform, cross tier
 A lightweight alternative to ActiveX
 Provides a bridge to ActiveX
 Provides a migration path from ActiveX
Why Java Beans?

A Java class that follows a design pattern
defined by the Java Beans Specification.
The design pattern allows other programs,
most commonly Visual Builders, to
understand bean capabilities and so connect
beans together.
Bean capabilities may be inferred, or explicitly
defined.
What is a Java Bean?

A Visual Builder for Java Beans uses existing
Java Beans to create:
 New Java Beans
 Java Applets
 Java Applications
 or simply to test Beans under development
Examples:
 Visual Age for Java
 Lotus BeanMachine
 WebRunner
What is a Visual Builder?

 Persistence
 Properties
 Events
 Customisation
 Packaging
 Invisible Beans
 ...
Java Bean Features Overview

 Uses Java serialisation support
 In many cases automatic
– May be hand-crafted
 State may be stored within container
 Used by Visual Builders
Persistence

 Define the state of a bean
 May be primitive data types such as boolean,
int, char...
 ...or complex objects
– May be read/write, read only, write only
 Accessed via methods
 May be simple or indexed
 May be bound and/or constrained
Properties

 Describe significant things that happen
 Are broadcast to listeners
 May be selectively listened to
Events

 A bean may have Customizers
 Bean properties may have Editors
Supplied as standard by the JDK
 Provided by the bean author
 A visible bean may have a run time user interface
for customisation
Customisation

 Bean class(es) and dependant classes and/or
resources packaged in a (compressed) JAR file
 Contents of a JAR file described by a manifest
Identifies bean classes
Identifies dependencies
Identifies design time only classes
 Resources may include
Saved bean states
HTML help files
Locale dependant information
Images
...
Packaging

Time for a demo
Connecting Beans

Objectives
 Easy access to data via JDBC
 Maximum flexibility in subsetting query results
 Maximum flexibility in connecting data to visual beans
 A demonstration vehicle for this Conference
"Universal Data Adapters for the Universal Database"
Not covered
 Create, Insert, Update and Delete
JDBC Beans

Query bean encapsulates:
 Database driver
 Server name/address
 Database name
 Userid/password
 SQL Query
 Result set limiter
execute() method performs
 Database connection
 Query submission
 Result set retrieval and data extraction
 Disconnection
Query

Selectors provide:
 A hook into a defined subset of Query result set
 Subset may be customised at design time, or modified
at run time
 Flexible data coercion to maximise connectivity to other
beans
 Four flavours of selector to suit different views on data:
Cell, Column, Row, CellRange
Multiple selectors may be used to map result set data to
multiple beans
Selectors

CellSelector provides:
 Access to a single cell, defined by
column name or number, and row
number
Forename Surname Bonus
Matt Perrins 5,000
Andy Smith 5,000
Lou Gerstner 5,000,000
 Cell defined by column name or number, and row
number
 Cell definition may be set at design time, and modified at
run time
 Column/row indexing may be one based or zero based
 Cell value accessible as a bound property, the type of
which may be specified to suit target bean
CellSelector

ColumnSelector provides:
 Access to subset of a single column,
defined by column name or number,
and row number
Matt Perrins 5,000
Andy Smith 5,000
 Column identification the same as with DbCellSelector
 Column data may optionally include column label
 Column values accessible as bound property, the type
of which may be specified to suit target bean
 Property may be a one dimensional array, or a Vector
ColumnSelector

RowSelector provides:
 Access to subset of a single row,
defined by start column number, end
column number, and row number
Matt Perrins 5,000
Andy Smith 5,000
 Row values accessible as bound property, the type of
which may be specified to suit target bean
 Property may be a one dimensional array, or a Vector
 Values may retain their "native" type when delivered as
a Vector
RowSelector

CellRangeSelector provides:
 Access to subset of a columns and
rows, defined by start column number,
end column number, start row number,
and end row number
Matt Perrins 5,000
Andy Smith 5,000
 Range values accessible as bound property, the type of whi
may be specified to suit target bean
 Property may be a two dimensional array, or a Vector of
Vectors
 Values may retain their "native" type when delivered as a
Vector of Vectors
CellRangeSelector

Image is an example of a visual bean that can present
BLOB (Binary Large OBject) data retrieved from a
database, provided it is in GIF or JPEG format.
Image

Time for
another
demo
Connecting JDBC Beans

Tools
 HTML for Presentation
Net Objects Fusion
FrontPage
 Java for Beans
Visual Age Java
Symantec Cafe
Lotus Bean Machine
Visual Age Webrunner
 JavaScript for Glue
Visual JavaScript
Use the Correct Tools to get the Job done right !

Summary
What We Had
C started without and tools and no GUI
Grew into C++ with proprietary class libraries
moved into Visual Basic and still locked to the Windows
platform
15 years of PC development history
The Internet standards are delivering its solutions
in period of 3 years
This has resulted in ....

Summary
Improvements on existing standards allowing for greater UI
flexibility
Improves usability of Sites Design
Leverage the Internet Components to simplify development
HTML,JavaBeans and JavaScript
Opportunity for real ReUse
Platform Independent Solutions
more information...

 IBM activities with Java and Java Beans - http://www.ibm.com/java/
 alphaWorks - http://www.alphaworks.ibm.com/
 NetObjects BeanBuilder - http://www.netobjects.com/
 WebRunner - http://www.software.ibm.com/ad/webrunner/
 DB2 UDB - http://www.software.ibm.com/data/db2/
 Sun Java Beans site - http://java.sun.com/beans/ or
drill down from http://java.sun.com/
 NetObjects Fusion - http://www.netobjects.com/
Useful references
eMail
matthew_perrins@uk.ibm.com

Universal Java Beans with DB2 from 1999, early Internet work

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