Real-Time Systems Lab. OSGi overview January 23, 2002 Sung-ho Park

Real-Time Systems Lab. Table of Contents OSGi overview –History of OSGi –Mission of OSGi –OSGi and Related Standard –OSGi Framework and Specification –Key Benefits of OSGi –Markets for OSGi OSGi End to End Architecture Service Gateway –Service Framework –Services Reference

Real-Time Systems Lab. History of OSGi Founded in March 1999 –Goal: To create open specification for the delivery of multiple services over wide area networks to local networks and devices Incorporated as a Non-profit corporation in May 1999 Current members –More than sixty companies … BMW, Ericsson, Nokia, NTT, HP, IBM, Motorola, Oracle, Sun Microsystems, Texas Instruments, Wind River Systems, Samsung Electronics, Sharp, Sony, Toshiba, Panasonic, Philips, ETRI …

Real-Time Systems Lab. Mission of OSGi1/2 Many wide-area network and home networking standards But no service delivery standard. ?

Real-Time Systems Lab. Mission of OSGi2/2 Provide open-platform independent framework and API’s for dynamic delivery of managed service with secure, scalable and reliable metrics

Real-Time Systems Lab. OSGi and Related Standards

Real-Time Systems Lab. OSGi Framework and Specification

Real-Time Systems Lab. Key Benefits of OSGi Platform Independent Application Independent Secure Multiple Services Multiple Local Network Technologies Multiple Device Access Technologies Co-existence with other Standards

Real-Time Systems Lab. Markets for OSG Residential Gateway Communication Services Energy Services Home Automation Services Security Services Remote Home Healthcare Services

Real-Time Systems Lab. OSGi End to End Architecture 1/2 OSGi spec. creates an open standard for programmable user-premises equipment –Downloading of software, application lifecycle management, gateway security, attached device access, resource management, and functions necessary for remote administration of the gateway Major components –Service gateway –Service Provider –Service aggregator –Gateway operator –Wide area network and carrier(ISP) –Local networks and devices

Real-Time Systems Lab. OSGi End to End Architecture 2/2

Real-Time Systems Lab. Services Gateway 1/2 Java environment: Service framework: defines API for creating and running services Services –Basic services Device access manager: defines API for accessing devices Log service: defines a required service for logging information

Real-Time Systems Lab. Services Gateway 2/2 –Optional services HTTP service: defines a service API for an HTTP-based web server Client access service: defines a service API for publishing information Configuration data service: defines a service for managing configuration information Persistent data service: defines a service API for persistent data

Real-Time Systems Lab. Service Framework Manage installation, Uninstallation, Update, Start, Stop of bundle, and dependencies between bundles and services Provide a concise and consistent programming model Presented as a bundle (System bundle)

Real-Time Systems Lab. Bundle Comprise Java classes and other resources for service BundleActivator class: start, stop

Real-Time Systems Lab. Services Generic services Device services Driver services

Real-Time Systems Lab. Generic Service Service interface: spec. of the service’s public methods Service object: Implementation of one or more service interfaces Registered(in start method) and unregistered(in stop method) at Framework Service Registry Using sequence Get service reference  get service object  interface using service interface

Real-Time Systems Lab. Device Service and Driver Service 1/6 Present physical device access methods Device service –Logical device –Belong to a defined device category Device interface Information to support Device Service Registration, Attachment Driver service –Connect between devices (physical and logical, logical and logical)

Real-Time Systems Lab. Device Service and Driver Service 2/6

Real-Time Systems Lab. Device Service and Driver Service 3/6

Real-Time Systems Lab. Device Service and Driver Service 4/6

Real-Time Systems Lab. Device Service and Driver Service 5/6

Real-Time Systems Lab. Device Service and Driver Service 6/6

Real-Time Systems Lab. Automatic Detection and Attachment of Devices 1/2 Device Manager –Attach Device service with suitable Driver service automatically –Using Driver Locator and Driver Selector –Driver Locator Assistant in location bundles that provided a Driver service –Driver Selector Assistant in selecting which Driver service is best suited to Device service

Real-Time Systems Lab. Automatic Detection and Attachment of Devices 2/2 Base Driver –Support automatic physical device detection

Real-Time Systems Lab. Reference OSGi's Specification Overview OSGi Service Gateway Specification Release 1.0 The Service Gateway 1.0 Overview OSGi Service Platform Release 2