Developing Jini™ Applications Using J2ME™ Technology

Hinkmond Wong is a software engineer with Sun Microsystems, Inc. He holds a B.S. in electrical engineering from the University of Michigan and an M.S. in computer engineering from Santa Clara University. Currently, Hinkmond is the specification lead for the J2ME Connected Device Configuration (CDC) and Foundation Profile and works on J2ME CDC-based libraries and the Personal Profile. His previous writing on the EmbeddedJava™ Application Environment using Jini connection technology was published in Dr. Dobb's Journal. 0201702444AB03202002

(NOTE: Each chapter concludes with a Summary.)

Preface.


1. Introduction.


Distributed Computing and Embedded Devices: A Natural Fit.



How Traditional Networks Have Failed.



Benefits of Using Java Technology.



Advantages of Jini Network Technology.



How Java and Jini Technologies Work Together in Embedded Devices.



2. The Power of Java Technology in Small Devices.


Java Technology Addresses the Problems of Small Devices.



J2ME Technology.



The Increasing Power of Small Devices.



J2ME CLDC.



Technical Overview.



New Features.



Unsupported Features.



J2ME Connected Device Configuration.



3. The Jini Network Technology Vision.


Wire Protocols: Constricting and Fragile.



Objects on the Network.



The API Defines the Network Interface.



Byte-Level Protocols Are Irrelevant.



Late Binding Insulates Developers.



The Power of Write Once, Run Anywhere.



Capitalizing on the Simplifying Assumptions of Java Technology.



Objects on the Network.



Jini Technology Matters in Small Devices.



4. J2ME Basics.


Java Technology for Consumer and Embedded Devices.



J2ME PersonalJava.



J2ME Configurations and Profiles.



The Migration Path from PersonalJava to J2ME.



Programming Issues.



5. Developing with J2ME.


Preliminary Steps.



Deciding Which Profile to Choose.



Mobile Information Device Profile.



Download and Installation.



Building.



Running an Example Program.



Foundation Profile.



Download and Installation.



Building.



Running an Example Program.



Personal Profile.



Download and Installation.



Building.



Running an Example Program.



6. Jini Technology Basics.


Jini Network Terminology.



The Plug-and-Work Model.



Object Protocol.



Dynamic Network Edges.



Leases.



Attributes.



Groups.



Lookup and Discovery.



Simple Code Example.



Proxy.



Quick-Start Guide for the Jini Technology Environment.



7. Jini Technology in Small Devices.


Plug-and-Work in Small Devices.



Better Device Driver Distribution.



Powerful Adaptive Architectures.



Compute Server.



Leasing.



Resource Constraints.



Class Loading.



Intermittent Connectivity.



8. J2ME RMI Optional Package.


RMI Optional Package for the J2ME CDC.



RMI Optional Package Design Goals.



J2SE Features.



The Security of the Java Programming Model.



Dependency Considerations for Downloading Code.



Serving Java Code in a Small Environment.



Interoperability with J2SE.



Java Card RMI Technology.



J2ME CDC/CLDC Client Method Invocation Semantics.



Java Card Side-Server Implementation.



Other Considerations.



9. J2ME RMI Optional Package Example.


Building the J2ME RMI Optional Package.



A Simple RMI Service.



Connecting the RMI Service.



Using RMI Optional Package with Jini Technology.



10. Jini Surrogate Architecture.


Benefits.



Functional Requirements.



Overview.



Discovery.



Surrogate Retrieval.



Activation.



Deactivation.



Specifications.



Surrogate Interfaces.



Surrogate Packaging.



Security.



Downloading the Jini Surrogate Architecture.



11. Jini Surrogate Architecture Example.


Guide to Developing the Example.



Decide on the Client/Surrogate Protocol.



Write the Client Program.



Write the Surrogate Program.



Run the Jini Technology Environment.



Start the Client Program.



Verify the Surrogate Is Running.



12. Other Java Technology Environments.


Local Application Servers.



External Application Servers.



Integrating J2ME Devices with the Enterprise.



Sun Open Net Environment.



Integrating with CRM.



Integrating with ERP.



Integrating with a Sales Organization.



13. Another Java Technology Example.


Guide to Developing the Example.



Decide on which Java Technology Environment to Use.



Decide on the Protocol to Use to Interact with the Other Type of Environment.



Write the Client Program.



Write the Surrogate Program.



Run the Jini Technology Environment.



Start the Client Program.



Verify that the Surrogate Runs Correctly.



14. Jini Technology Design Ideas.


New Ideas for Jini Technology.



J2ME Future Enhancements.



Jini Future Enhancements.



Existing Peer-to-Peer Technology.



Peer-to-Peer Strategy.



J2ME Client Device Strategy.



Further Readings and Online Resources.



Legend for Appendices.


Appendix A. J2ME CDC/Foundation Profile Almanac.


Appendix B. J2ME CDC/RMI Optional Package 1.0 Almanac.


Appendix C. J2ME CDC Personal Profile (java.applet, java.awt, and java.beans) 1.0 Almanac.


Index. 0201702444T03202002