JINI Technology

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JINI Technology

• Ashwin
• Satyanarayana
• Venkatesh
• Nattanmai
• PART - I

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Introduction to JINI

• What is JINI ?

• Jini is a way to do distributed computing that
  helps you manage the dynamic nature of networks

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• JINI is NOT a Acronym
• It is a technology which helps devices to work
  together and connect simply

• Is Jini a Acronym?

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Need for JINI

• Why JINI ?

• Enables a spontaneous "plug, use, and unplug"
  network
• No system administrator required
• Everything on the network (hardware or software)
  is a "service"
• Each service represented by a mobile object

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Portability

• Jini technology will run on any network with at
  least one Java Virtual Machine.

• Is Jini Portable?

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To add Jini technology to existing software, it
must have a Java "wrapper" so it will run inside
the JVM. Then, add the Jini code that enables the
original application to register itself with the
lookup service.

• How do you add Jini
• to an existing software?

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Hierarchy of Layers

• Where does JINI fit in the hierarchy?

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• Jini connection technology is designed to
  simplify networking through an infrastructure to
  support devices connecting and forming
  communities.
• It is based on Java technology, using the Remote
  Method Invocation to move code around the
  community

Jini Infrastructure
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• Jini technology provides simple mechanisms which
  enable devices to plug together to form a
  community put together without any planning,
  installation, or human intervention.
• Each device provides services that other devices
  in the community may use.  These devices provide
  their own interfaces, which ensures reliability
  and compatibility

• How does JINI work?

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• Where is JINI used?

• Devices permeate our lives.  Look around  TVs,
  DVDs, cameras, phones, PDA, printers, disk
  drives, pagers. A device performs a simple task,
  and only that task.
• Today devices are unaware of their surroundings -
  they are rigid and cannot adapt.  When you buy a
  disk drive, you expend a lot of effort to install
  it or you need expert to do it for you.

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Jini in the device

• With the help of JINI Technology, a device that
  can take charge of its own interactions can
  self-configure, self-diagnose, and self-install. 

• How does JINI Technology help in devices?

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Jini in networks!!!

• With the ever falling cost of Computers ,Jini
  technology creates the possibility of impromptu
  device communities popping up in all kinds of
  places far from any sys admin.
•  
• Self-managing devices reduce further the need for
  expert help, and this should lower the total cost
  of ownership for Jini connection technology-based
  systems.

• How does JINI reduce the cost of the modern day
  networking devices?

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Parts of Jini
Components of a Jini System

• What are the components of a JINI System?

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• Explain the components of the JINI System?

• In a running Jini system, there are three main
  players.
• There is a service,
• Eg printer, a toaster, a marriage
  agency, etc.
• There is a client which would like to make use of
  this service.
• Thirdly, there is a lookup service (service
  locator) which acts as a broker/trader/locator
  between services and clients.
• There is an additional component, and that is a
  network connecting all three of these, and this
  network will generally be running TCP/IP.

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• It gives the device following
• Characteristics
• Instant On a device works as soon as it is
  plugged into the community.
• Impromptu Community create a community of
  services for the location and personal needs
• Resilient the community changes over time, but
  is always available.
• Special Delivery services are available on
  demand, as needed.

• What are the positive aspects of using JINI
  Technology in a commonly used devices like Camera
  and Cell Phone ?

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Sample JINI Working Model

• Connects to a TCP/IP network.
• Use a discovery protocol to find at least one
  lookup service.
• Register with the lookup service.
• Continue to renew the resource's leases, as long
  as the service is available to the network.

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• End of Part - I
• Thank You
• Ashwin Satyanarayana
• Venkatesh Nattanmai

18
JINI Technology
Ashwin Satyanarayana
Venkatesh Nattanmai PART -
II
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Digital Camera Example

• Without JINI
• Today, the camera is cabled to a general purpose
  computer or the camera memory is removed and
  inserted into a computer, in order to download
  the images.

• With JINI
• With Jini technology its possible for a camera
  to plug into a digital photo kiosk or simply
  connect the camera to your home Jini network.
• We will instantly have access to the files and
  can choose to use color printer services or share
  the images through your distributed disk service.
  
• Jini connection technology enables impromptu
  networks of resources to live and serve in the
  ever changing world.

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Calculator Example

• Lets take a look at implementing the calculator
  service and registering its service on the
  network

The steps involved are a) define a Calculator
interface b) Create the GUI Frame class for it
c) Create the object that does the actual
service d) Use the Join Manager for easy
registration.
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Calculator Example

• The interface Calculator Code
• / This is the contract interface, which is
  being provided by the CalculatorService class /
• import java.awt.Frame
• import java.rmi.
• public interface Calculator extends Remote
• public Frame getCalculator() throws
  RemoteException

• Explain the Interface Calculator Code?

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Calculator Example

• Explain the getCalculator() method?

The function getCalculator() is implemented as
follows Public Frame getCalculator() throws
RemoteException Frame f new
CalcFrame() f.setSize(300,150)
return f
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Calculator Service class
The CalculatorService is registered with the
lookup service as follows CalculatorService
calculatorService new CalculatorService()
String hostName "chittu.cswl.com" Naming.rebind
("rmi//"hostName CalculatorService",calculator
Service) System.out.println("Bound with
RMIRegistry")
Object serviceStub Naming.lookup("rmi//"hostNa
me"/CalculatorService")
System.out.println("Trying to Join Manager")
// Join the manager so that it will become a
part of federation new JoinManager(serviceStub,
attributes,calculatorService, new
LeaseRenewalManager())
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JINI - DCOM - CORBA

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• Sun was recently awarded a contract by the U.S.
  Army to employ Sun's Jini technology for a
  dot-com solution to link the network of complex,
  sophisticated equipment in its battlefield
  command spots, known as Tactical Operation
  Centers (TOCs).
• Jini technology meets the requirement by letting
  computers and other devices interoperate
  immediately after being connected.

JINI in Mission-Critical Deployment.

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Companies using JINI

• 3Com, Palm Computing Inc.
• Canon
• Computer Associates
• Cisco Systems Inc
• Ericsson, for the Bluetooth Consortium
• IBM
• Kodak
• Motorola
• Nokia
• Novell
• Philips
• Phoenix Technologies
• Samsung

• Seagate
• Sharp
• Sony
• Toshiba
• Xerox

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Microsoft Vs Sun

• The Sun rival is hard at work on its own new-age
  networking technology, called Universal Plug and
  Play. Microsoft and several other companies are
  developing ways to shield users from the
  often-obtuse demands of networking equipment
  together.

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References
1.Overview of JINI http//pandonia.canberra.edu.a
u/java/jini/tutorial/Overview.xmlJini 2.JINI
Example codes http//www.cswl.com/whiteppr/tutoria
ls/jini.html 3.Comparison of JINI with CORBA and
DCOM http//www.execpc.com/gopalan/misc/compare.h
tml 4.JINI in US ARMY http//www.sun.com/dot-com/
studies/jiniinthearmy.html
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References
5.Introduction to JINI http//triton.cc.gatech.ed
u/ubicomp/603 6.JINI Network Technology
Whitepapers http//www.sun.com/jini/whitepapers/te
chnologies.html 7.JINI Videos http//abcnews.go.c
om/sections/tech/CuttingEdge/jini990913.html 8.In
formation on JINI Technology http//www.dalmatian.
com/java.htm
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• End of Part - II
• Thank You
• Ashwin Satyanarayana
• Venkatesh Nattanmai