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Java Device Driver Kit (JDDK)

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

3 JDDK Introduction
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 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 { … 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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