2. Java Device Driver Kit (JDDK)
Tom Saulpaugh
Sun Microsystems, Inc.

3. JDDK Introduction http://www.javapos.com/ http://www.jxfs.com/
JDDK enables Java device drivers for JavaOS™, Solaris™, Windows™, OS/2™, Macintosh™, Linux or any other host OS supporting JDK or better
The next step beyond javax.comm in local device support on the Java software platform
Supports horizontal (WORA) and vertical market software
Java Point Of Sale (JavaPOS™) retail software
Java Point Of Sale (JxFS™) financial software
Very similar to Luna - JavaOS for NC’s code
target is OEMs - adaptation kit allows you to do that

4. JDDK Relationships to:
Java Platform Services (JPS)
Core code of JDDK shared with JavaOS
JavaOS
Shares JPS codebase including JSD, JSL, JSE, and Security Manager
JDK
JDDK runs as a configurable Java software application
Java Communications API (javax.comm)
Loadable package configured by JDDK

5. Current & Future JavaPOS, JDDK and JavaOS Releases
JavaPOS 1.3 released, with 1.4 in development
JDDK FCSc2 released
June 30th, 1999
Final JDDK FCS in development
Summer 99
JavaOS For Business v2.1 released
Nov 98
JavaOS For Business v2.2 in development

6. What’s in the JDDK? Documentation JPS.jar Sample business cards
Readme, javadoc, JPS Specification, JSD Spec
JPS.jar
JSD, JSL, JSE, Security Manager classes
Sample business cards
Sample applications
Sample services
Sample packages

7. What’s NOT in the JDDK? CommAPI and the JDK
Download these from Java Developer Connection (JDC)
Get correct version for your host OS
Java Software Toolset and IDE
Use your favorite one (The JDDK group likes the Metrowerks CodeWarrior™ product)
JavaOS or any other OS / native libraries
Thin-client or Fat-client admin toolset

8. What can you do with the JDDK?
Write WORA and/or local device-aware software
Apps
Drivers
Services
Packages
Use it as a JavaOS For Business software development tool free
Deploy it as a Java client configuration framework
Admin toolset (Browser) needed

9. JDDK Installation It’s easy: Create a directory on client for the JDDK
Unzip the JDDK zip file
Sample JavaSystemFolder created (JDDK root mount pt.)
Creates configuration sub-directories and files necessary to run sample demo
Creates demo directory containing sample jars
Creates doc directories
Creates archive directory

10. JDDK FCSc2 Contents

11. Running the Sample JDDK Demo
Start the JRE
JDK classes.zip in classpath
JPS.jar and javax.comm in classpath
Specify JPSMain as the main startup class
javaos.javax.system.platform.JPSMain
Specify config mount pt. to JPSMain
“myclient/JavaSystemFolder”
Specify debug lvl (0,1,2) and options (-rescan)

12. What’s in the Demo? JavaPOS 1.3 package Sample JavaPOS application
/system/package/jpos13.jar
Loaded first by JDDK
Sample JavaPOS application
/application/package/Application/com/ibm/jpos/DemoPOSApp.jar (loads second)
Sample JavaPOS printer service
/application/service/com/ibm/jpos/POSPrinterService.jar
Loaded last (when opened by application)

13. Demo

14. JavaSystemFolder Root Mount Pt. containing client config info
Business card files identify software to configure
JDDK-generated configuration archive files capture “software sets”
Automatically scanned by JDDK
when no config archive files are present
“-rescan” option is specified as startup param
Result of scan is a named “software set” such as “current client configuration”
Mount pt. directory path passed as startup param (could even be on server)

15. JavaSystemFolder Identify software to configure Identify software sets
System software (runs first)
Application software (runs after system software)
Identify software sets
Collection of business cards
Auto-generated as result of scan
Each client references a JavaSystemFolder
Duplicated for each client OR
Shared on server

17. LAN Client Configuration
Sharing the Server’s
JavaSystemFolder
Server
Intranet
Clients
Client
Client

18. Thin Client (WAN or LAN)
Synchronization with Server’s
JavaSystemFolder
Server
Intranet OR
Internet
Clients
Client

19. Software Business Cards
Identifies software bundles (JARs)
Applications, Drivers, Services, Packages
Identifies software lifecycle classes
PackageInstance and ServiceInstance interfaces
Parser plug-ins for HTML, Text, and XML (future)
Contents
Standard portion including code URLs
Optional custom portion to hold software configuration parameters

20. Business Cards Define Configuration Parameters
Standard parameters used by JSL
Title (Displayed by admin toolset) and code/resource URLs
Matching names and loading options
Loading Options
Always load, load when matched to device, or lazy load (load when first used)
Custom property and attribute access
JSD property api used to get / set values
Attributes are special “meta-properties”

22. Business Card Definitions using the JDDK or JOS4B
JDDK uses a configuration grammar
Read by a parser / compiler during startup
Creates business card entries in JSD
Grammar resides in files outside JARs
Grammar is text, and edited using a text editor and/or browser
Grammar can be embedded in HTML or XML
JavaOS For Business toolset uses beans within the application or service JAR to define Business cards
Rest of code in JAR is the same

23. 4 JDDK Configuration Archive Files (Software Sets)
/archive/jsd/config directory
System Services File
System Packages File
Application Services File
Application Packages File
JPOS v1.3 is a system package
POS Printer Service is an application package
POS Demo Application is an application service (lazy load upon connection)

24. Config tree grammar overview
Keywords / Delimiters
Attributes
Entry name
Properties
Template name
Tree name
; “” : = [ ]
// and /* comments */
Description
Define attributes
Define a JSD entry
Define properties
Define template
Define config tree
Delimiters
Comments

25. Property & Attribute Values
Compiler Primitive Types
Strings, booleans, bytes, chars, doubles, floats, ints, longs, and shorts
Arrays supported using ‘[ ]’ token
Boolean values are “true” or “false”
Number values use Java language syntax
Default type is unicode String with value in “ “
myStringProperty = “this is a string”;

26. Property and Attribute Value Templates
Used to define property and attribute values NOT understood by config tree compiler
NOT a string, boolean, or number
Template names class that understands how to construct this kind of object
BusinessCard template class supplied with JDDK
Extensible mechansim for application and driver developers much like beans

27. Business Card Template
Template javaos.javax.system.services.BusinessCard { … primitive values go in here }
Template compiled when JPS starts
Template can also be written or “de-compiled” upon JPS exit or under the control of the application

28. Java Driver Development Kit Summary
JDDK is at FCSc2, with “final” FCS in Summer 99
Runs on ANY OS that supports JDK 1.1.6
Uses ANY Java software toolset / Browser
Supports Comm API Version 2.0
Contains JSD, JSL, JSE, and many other core JOS4B OS components
Drivers that use Comm API to access device run in JDDK and JavaOS For Business

29. Further Information New Addison Wesley Longman Book Sun web sites:
“Inside the JavaOS Operating System”
Sun web sites:
Vertical market web sites:

30. © Copyright 1998 Sun Microsystems, Inc., All rights reserved.
Sun, Sun Microsystems, the Sun logo, Java, JavaOS, Solaris, JavaOS for Business, JavaOS for Consumers, Java Dynamic Management Kit, PersonalJava, EmbeddedJava, Java Card, the Duke mascot, Java Foundation Classes (JFC), Java2D, Java Coffee Cup logo, JDK, JavaCheck, Java Filter, JDBC, Java virtual machine, JavaEngine, 100% Pure Java, JavaBeans, and The Network Is The Computer are trademarks, registered trademarks, or service marks of Sun Microsystems, Inc. in the United States and other countries.
All SPARC trademarks are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the United States and other countries. Products bearing SPARC trademarks are based upon an architecture developed by Sun Microsystems, Inc. 10 10

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