2

Or: The End To Protocols As We Know Them

Dr. Hellmuth BrodaChief Technologist

Europe, Middle East & AfricaMember, Sun Vision Council

Sun Microsystems, Inc.Hellmuth.Broda@Sun.COM

Dr. Hellmuth BrodaChief Technologist

Europe, Middle East & AfricaMember, Sun Vision Council

Sun Microsystems, Inc.Hellmuth.Broda@Sun.COM

Jini™ Technology

Jini™ Technology

Simply connect.

A Computing History

Disk CenteredComputing

MicroprocessorAge

NetworkAge

CPUDiskDisk-oriented OSMulti-chip CPUs

Systems on a boardInexpensive disksEmbedded devices

Personal devicesNetwork services

ServiceAge

1950’s1950’s 1980’s1980’s Mid-1990’sMid-1990’s

Jini CommunitiesJava™ Technology Services

20002000

History of Jini

• Sun R&D project (Bill Joy, and Jim Waldo with Ann Wollrath, theinventor/designer of RMI, Ken Arnold, the designer of JavaSpaces, and Bob Schleifer, designer of Lookup/Discovery).

• Mid-1960‘s: David Gelernter (Yale) developed a programming language called LINDA (http://www.cs.yale.edu/HTML/YALE/CS/Linda/linda.html)

Linda and JavaSpaces

• JavaSpaces: implementation of the ideas behind LINDA but greater use of recent advances in object technology, namely Java.

• ``The work at Yale focused mainly on data, but today we can just move objects in and out of JavaSpaces [. . .] JavaSpaces is essentially a facility for communicating tasks out and bringing jobs back'' (James Gosling).

Drivers of Transition to the Networked Age

• Increased network bandwidth

• Bandwidth is pervasive —increase in the number of wired/ wireless networks

• Inexpensive processing power (systems on a chip)• Software based on objects and agents

Ten Megatrends

1. Services – not applications2. Wireless > Internet > PC markets3. eMarketPlaces4. Content => service => device5. Network centric development6. Focus on business logic and accessibility7. Capacity planning is an oxymoron8. Supply chain integration and auctioning

as examples of new business model9. Everything is mission critical10.Simplicity!

The Six WebsThe Six Webs

EntertainmentEntertainmentTraditionalTraditional

eCommerceeCommerce

Pervasive computingPervasive computing

Pocket CommunicatorPocket Communicator

Voice activatedVoice activated

The Traditional Web

• computer• keyboard• screen

Pocket Communicator Web

• follows you around• in your pocket• personal communicator• system on glass• my: position, profile,

surrounding, context• cell phone?• clipping?

The Entertainment Web

• sit on your couch• be entertained• ambient intelligence• follow-me system• story telling• video games• mobile music

The Voice Activated Web

• voice activation• agents, bots• studs• always on• contiguous real time

The eCommerce Web

• business to business• business to consumer• machines talking to

machines

The Pervasive Computing Web

• machines talking to machines• Jini, federations• wired or wireless• electric, processor, memory• communication free• processor free• memory free

The big transition• From our product centric

industry to a service centric industry

• Products (and content?) will metamorphose into services

• Light bulb -> illumination lease

Big QuestionsHow rich does the set

of network-supported services become?

How can we interoperate without a PhD in networking?

The Quest For Connectivity

Jini technology, based on Java technology,enables digital services to simply connect

together.

What is Jini?

• Software layer (48kB) to describe services to the net

• Runs on all Java Virtual Machines (JVM) on any device (from mainframe to toaster)

• Only the Front-End of the service is transmitted---Distributed Computing

• End of all Protocols as we know them• Resilience: does not assume that

networks always work

Jini Technology Enables You to Simply Connect• Instant On

– Plug it in and it just works, no fuss, hassle free• Impromptu community

– Create your personal community of devices and services — at home, in the office, or on the road — and interact with other communities quickly and easily

• Resilient– Your Jini community maintains itself & adapts to

change– Your Jini community is always available– The Service Age allows the system to be more

tolerant and redundant• Special delivery

– Services are available on demand

Introduces Simple, Powerful New Concepts

Simply Connect to Anyone, Anywhere, Anytime on Anything

Services

HomeSmall Office Email Voice

Financial Telephony

Entertainment

Email Voice

Financial Telephony

Entertainment

CorporateData Center

Mobile

Jini Technology Signals theStart of the Service Age

Creates NewBusiness Opportunities

• Device Manufactures

– Storage, peripherals, PDAs, CPUs, etc.

• Device Manufactures

– Storage, peripherals, PDAs, CPUs, etc.

An Easier Way to Interactwith the Digital World

• Consumers– Phone– VCR– TV

• Consumers– Phone– VCR– TV

• Service Providers– Search Engines– Portals– Telecommunications

• Service Providers– Search Engines– Portals– Telecommunications

A Simple Way toDevelop & Deploy New Services

Create and DeployNew Applications

• Developers– Tools– Management software

• Developers– Tools– Management software

The Philosophy Behind Jini Technology• Simplicity: Less is more

– Small code base– No complicated OS– Everything is an object– Use RMI to extend objects to remote

resources

• Self-healing networks– System restores state after failures– Resilience

• Community– Easy access to Jini technology– Anyone can join the Jini community

• Everything is an object • Distributed system is just a

distributed program• Java Class Hierarchy describes

devices/services• Mobile Code via Remote Method

Invocation• Leasing and distributed garbage

collection provides self-healing• Individual devices/services can be simple,

don’t require a Java Virtual Machine• Services available on demand

Jini Technology Principles

Jini Technology

Java + JiniTechnologyJava + Jini

Technology

InfrastructureInfrastructure Programming Model

Programming Model

ServicesServices

• Java APIs• JavaBeans

Components• etc...

• Java APIs• JavaBeans

Components• etc...

• Discovery & Join

• Distributed Security

• Lookup Service

• Discovery & Join

• Distributed Security

• Lookup Service

• Java Virtual Machine

• RMI• Java Security

• Java Virtual Machine

• RMI• Java Security

• JNDI• Enterprise JavaBeans

Components• JTS• etc...

• JNDI• Enterprise JavaBeans

Components• JTS• etc...

• Leasing• Transactions• Distributed Events

• Leasing• Transactions• Distributed Events

• Printing• Transaction Manager• JavaSpaces™ Service

• Printing• Transaction Manager• JavaSpaces™ Service

Base JavaTechnologyBase Java

Technology

Let objects find each other,...

…add simple APIs for remote

objects and basic distributed

computing,...

…then everything else

is a service.

Discover (find) and join a community of Jini technology-enabled devices

Advertise its capabilitiesProvide any required software and

attributes – no drivers requiredRequires only one Java Virtual Machine

on the networkSend out a multicast packet with reference

to yourselfReceive a RMI reference to the Lookup

Service

Innovative Solution for Finding the Place to Start in an Unknown Network

Jini Technology Infrastructure:Discovery & Join

Repository of available servicesStores service as extensible set of Java

application objectsID, interface, GUI’s, attributes, drivers...

Service objects downloaded as requiredMay be federated with other lookup

servicesLookup Service interface

Registration, Access, Search, Removal

Binds the Jini Community Together

Jini Technology Infrastructure: Lookup Service

Basic communication mechanism between components in a Jini system

Secure ability to find, activate, and garbage collect objects

Allows data as well as code to be passed from object to object

Jini Technology Infrastructure: Moving Code

Uses Java Technology Remote Method Invocation (RMI)

Protocol for managing resources using a renewable, duration based model

Contract between objectsResources can be shared or

nonshared

Provides Method of Managing Resources in a Networked Environment

Jini Technology Programming Model: Leasing

Designed for distributed object conversations

Light weight, object-orientedSupports subset levels of ACID

propertiesSupports nested transactionsUses leasing protocol

Enables Distributed Entities to Cooperate

Jini Technology Programming Model: Transactions

Extends Java platform event model to allow it to work in a distributed network

Register interest, receive notificationAllows for easy use of event managersCan use numerous distributed delivery

models: Push, pull, filter ...Uses leasing protocol

Addresses Peculiarities of Messages in the Networked Environment

Jini Technology Programming Model: Distributed Events

Jini distributed security adds notion of principal and access control lists

Jini services are accessed on behalf of a principle which traces back to a particular user/device

Access to a service depends on the access control list associated with that service

Builds on the Java Virtual Machine

Jini Technology Infrastructure: Distributed Security

Shared, “dynamic memory” for networked Java Virtual Machines

Helps federate the network of Java Virtual Machines

Provides simple, dynamic object persistence

Facilitates alternative messaging patternsasync, store and forward, routed, filtered...

Service interface of JavaSpaces technologyWriting, finding, reading, removing, event

May be Used to Implement a Large Number of Distributed Computing Patterns

Jini Technology Services:JavaSpaces™ Technology

Jini™, how does it work?

Java Interface CodeJava Interface Code

Java Interface Code

Service Request

Print ServiceŒ

Ž

Jini Lookup Service

I want to print

Register your service (Java

API) at the Jini Lookup Service.

Jini Lookup Service stores copy of Java interface code for

print services.

Request a print service.

Jini Lookup Service passes copy of print

interface code to requestor.

Client uses print services

using code from

manufacturer.

I offer print services!

Jini™, how does it work?

Java Interface Code

Œ

Ž

Jini Lookup Service

I offer image services!

Register your service (Java API) at the Jini Lookup

Service.

Jini Lookup Service stores copy of Java interface code for

services.

Request the service.

Client uses services using

code from manufacturer.

Image Service

Show me what’s on.

Java Interface Code

Jini Lookup Service passes

copy of interface code to requestor.

Service Request

Java Interface Code

The Jini Community

• Sun Community Source License (SCSL) model

• Any Jini SCSL licensee is in the Jini community

• Programs available for training, support, and marketing

Jini Technology Adoption is Accelerating• Jini community is increasing daily

• Current development by Jini community members– Computer devices (Printers and storage)– Consumer devices (Camera, DVD, VCR, settop)– Mobile devices (Pager, cell phone, PDA)– Automotive devices (GPS, sound, embedded

control)– Networked devices (Routers, switches)– Networked services

• Community is defining and implementing– JavaSpaces, directories, printer classes

Where Will We See Jini In the Future?• desktop, portable

computers• printers,

scanners• WebCams• disk drives• DVD, CD players• VCRs, TVs• refrigerators,

freezers

• alarm systems• heart monitors• heating• air conditioning• automobile

engines• dashboard

computers• kitchen

appliances• . . .

Who is implementing Jini already?

•Adaptive NetworksAdaptive Networks•America OnlineAmerica Online•Axis CommunicationsAxis Communications•BEA SystemsBEA Systems•BizTone (ERP BizTone (ERP services)services)•Bosch SiemensBosch Siemens•BullBull•Canon (“using Canon (“using imaging products imaging products over any network”)over any network”)•CiscoCisco•Computer AssociatesComputer Associates•Creative Design Creative Design SolutionsSolutions•Dallas Dallas SemiconductorSemiconductor

•EchelonEchelon•EncantoEncanto•EricssonEricsson•FunaiFunai•IBMIBM•Inprise Corp.Inprise Corp.•Kinkos Corp.Kinkos Corp.•KodakKodak•Metroworks (Code Metroworks (Code Warrior--SW dev)Warrior--SW dev)•MotorolaMotorola•NovellNovell•NokiaNokia•Oki ElectricOki Electric•Philips (HAVi)Philips (HAVi)

•Phoenix Phoenix TechnologiesTechnologies• QuantumQuantum•Samsung Samsung (“Home (“Home Wide Web”)Wide Web”)•SeagateSeagate•Seiko EpsonSeiko Epson•SharpSharp•Sony Sony (HAVi)(HAVi)•SymbianSymbian•Palm ComputingPalm Computing•TatungTatung•ToshibaToshiba•Xerox Xerox (remote doc (remote doc services)services)

How are we doing with Jini Technology?• January 25, 1999 - Jini is officially launched

and the technology is available for download

• March - Sun hosts the first Community event: the Printer Group

• March - jini.org goes live• April - Sun hosts the second Community

meeting: the Storage Group• May - Sun hosts the first full Community

Summit. Over 70 companies participate• June - Sun’s Professional Services launch a

full suite of Jini technology service offerings.

• June - J2EE incorporates Jini as a complementary technology.

• June - Addison-Wesley publishes The Jini™ Specification & The JavaSpaces ™ Principles, Patterns, and Practice

• June - JavaOne -- Eight Jini partners exhibit products or concepts.

• June - Jini Technology Group releases JavaSpaces 1.0, Jini 1.1 Helper Utilities and Services Draft Specification and RMI Security Draft Specification

• July - the US Army announces they are implementing Jini technology.

• August - Prentice Hall publishes Core Jini• October - Sun hosted the second full Community

Meeting.• November - Released Jini 1.0.1, JavaSpaces

1.0.1, TCK 1.0B, Jini 1.1Alpha

How are we doing?

• February, 2000 - Motorola announces plans for Jini in Command and Control.

• March - O’Reily publishes Jini in a Nutshell• March - 3rd Community Summit held in California.• March - The printer working group agrees to final

draft of the Printer API specification• April - eko Medical Systems announces products

based on Jini.• April - 50,000+ developers are using Jini.• April - Jini Service UI working group releases code to

community.• June - JavaOne with over 33 Jini presentations and a

host of customer exhibits.• June - 4th Community Summit the day before

JavaOne.

How are we doing?

What have we learned about Jini Technology?

• As partners have begun to understand its power, they are broadening its use.

• The market has taken the technology well beyond Sun’s initial positioning

• Offering Jini Technology through Sun’s Community Source License has stimulated research and development into what makes up a Jini service

Examples for Jini Projects

• FETISH• PABADIS• HeyWow• Siemens

Financials

• US Army• Web Trader• Car Manuf.

Ford, . . .Other interesting

efforts• WEBVillage• JEMS

Ford, Visteon @ JavaOne

Driving directions

Jini in the Home• Jini fridge• Jini

dishwasher• Jini waste bin• Jini light

switch• Jini toaster?• Basis for

leasing• Jini . . .

Why Jini?• Technologies

(and Protocols) come and go

• Jini can bridge technology generations

• Simple---no external knowledge of service required

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connections:

Expected Jini MarketCustomers

>25

eko

Motorola OpenWings

Jini Surrogate Architecture

Lookup Service

JiniServices

JiniClients

Jini/YSurrogateHost

Jini/XSurrogateHost

Jini/X Surrogate Protocol

Jini/Y Surrogate Protocol

com.mycom.jini.ServiceA[B,C]

com.mycom.jini.ServiceA[B,C]

com.mycom.jini.ServiceA Device could be repackaged

as a native Jini device

Jini Technology:Innovation for the Future

• Powerful, yet simple technology & licensing– Enables mobile behavior and computing

• Drives emerging networks of devices/services– Catch system-on-a-chip wave– No bloated fragile OS with complex

configuration

• Appropriate software for the networked age– Platform independent via Java Virtual Machine– Object-oriented via best language– Allows dynamic systems that can easily evolve

Simply connect.

Quotes on Jini

“We've taken the time to make it simple”

- Bill Joy

“Plug&Work instead of Universal Plug&Play”

- Scott McNealy

“Plug&Work instead of Universal Plug&Play”

- Scott McNealy

Service Driven Network

PlatformPlatform

ServicesServices

UsersUsers

SolarisTM

is .com grade platform

What You Need to Use Jini Technology

May The Force (of Solaris) Be With You . . .