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R.Renuka, R.VidhyaPriya,

Jini™ Technology

Contents Introduction JINI Architecture Features and Benefits JINI ServicesConclusion

Simply connect.

Introduction

Jini is a distributed-object computing technology and is all about ubiquitous network-centric computing.

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

JINI Architecture Jini – Apache River

Distributed systems in the form of modular co-operating services.

Jini Specifications This helps to built a distributed system

organized as a federation. Runtime infrastructure – providing

mechanisms, - Adding - Removing - Locating

- Accessing services.

Runtime Infrastructure supportsRuntime Infrastructure supports Discovery Join Lookup

Main Goals of JINISharing

Access from anywhere

Easy to create and manage the network devices

The three major components that make up a running Jini system The Jini Client The Server Locator The Jini Service

Features and Benefits Protocol Independence  Location Independence  Interface / Implementation Decoupling  Automatic Performance Tuning  Monitoring & Management 

Service Oriented Architectures Jini has been designed

from the beginning to support distributed Service Oriented Architectures (SOA) .

SOA’s Eight Features Reliable Secure Homogeneous Latency is zero Bandwidth is infinite Topology doesn't change There is one administrator Transport cost is zero

JINI Services Runtime service:

The Runtime Infrastructure enables Jini services to register with Lookup services through a process called discovery and join.

Discovery – Jini enabled device locates lookup service.

Join – Device register the service with lookup service.

Lookup – Enables the clients to locate and contact services.

Discovery

Used by both the Jini services and Lookup Locator services to announce their presence on a distributed Jini network.

It uses three types of sub protocols, depending on the state a Jini component is in.

Sub Protocols Multicast Request Protocol Multicast Announcement Protocol Unicast Request Protocol

Other Services The Echo service Remote Interface Distributed Programming Models - Leasing - Distributed Events - Transaction

Conclusion Jini attempts to raise the level of

abstraction for distributed systems programming, from the network protocol level to the object interface level.