OSGi Technology Hsin-Han Yang, Cheng-Yi Chien, Po-Cheng Huang

OSGi TechnologyOSGi Technology

Hsin-Han Yang, Cheng-Yi Chien,Po-Cheng Huang

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OutlineOutline

What is OSGi TechnologyIntroduction

AllianceSpecificationsKey BenefitsOSGi Terminology

OSGi FrameworkService & BundleUse CasesOSGi Implementation

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What is OSGi TechnologyWhat is OSGi Technology

It’s a module system for the Java platformIt’s dynamicIt’s service-orientedA specification of the OSGi Alliance, a non-profit organization

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OutlineOutline

What is OSGi TechnologyIntroduction

AllianceSpecificationsKey BenefitsOSGi Terminology

OSGi FrameworkService & BundleUse CasesOSGi Implementation

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AllianceAlliance

“Open Service Gateway Institute”The Alliance has been founded by Sun Microsystems, IBM, Ericsson and others in March 1999.Among its members are (as of 2008) more than 35 companies from quite different business areas, for example Hitachi, Mitsubishi Electric Corporation, Motorola, NEC, Nokia, Oracle, ProSyst Software, Red Hat, Siemens Enterprise Communications, Software AG, SpringSource…

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SpecificationsSpecifications

OSGi Release 1 (R1): May 2000 OSGi Release 2 (R2): October 2001 OSGi Release 3 (R3): March 2003 OSGi Release 4 (R4): October 2005 / September 2006

Core Specification (R4 Core): October 2005 Mobile Specification (R4 Mobile / JSR-232): September 2006

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SpecificationsSpecifications

OSGi frameworkStandard service definitions

Log ServiceHttp ServiceDevice ServicePackage Administration ServicePermission Administration ServiceConfiguration Administration ServicePreferences ServiceUser Administration Service

SpecificationsSpecifications

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Key BenefitsKey Benefits

Platform IndependenceApplication IndependenceMultiple Service SupportService Collaboration SupportMultiple Network Technology SupportSecuritySimplicity

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Key BenefitsKey Benefits

Avoids Java Archive (JAR) file hellReuse code "out of the box"Simplifies multi-team projectsEnables smaller systemsManages deployments local or remotelyExtensive tool supportNo lock in, many providers of core technology including many open sourceVery high adoption rate

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OSGi TerminologyOSGi Terminology

Services gatewayFrameworkServiceBundle

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OutlineOutline

What is OSGi TechnologyIntroduction

AllianceSpecificationsKey BenefitsOSGi Terminology

OSGi FrameworkService & BundleUse CasesOSGi Implementation

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OSGi FrameworkOSGi Framework

Services gatewayGeneric application framework

Lightweight frameworkSimple component modelService registrySupport for deployment

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OSGi FrameworkOSGi Framework

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OSGi FrameworkOSGi Framework

The Framework is divided in a number of layers: Execution Environment, Modules, Life Cycle Management and Service Registry. Additionally, there is a security system that is deeply intertwined with all the layers.

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OSGi FrameworkOSGi Framework

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OutlineOutline

What is OSGi TechnologyIntroduction

AllianceSpecificationsKey BenefitsOSGi Terminology

OSGi FrameworkService & BundleUse CasesOSGi Implementation

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Service & BundleService & Bundle

ServicesProvide applications

Bundles (JAR file)Provide (export) and reuse (import) services via the framework

Identify Java packages (classes)Implement specified interface (services)Register services with the Service Registry

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Bundle Life CycleBundle Life Cycle

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OutlineOutline

What is OSGi TechnologyIntroduction

AllianceSpecificationsKey BenefitsOSGi Terminology

OSGi FrameworkService & BundleUse CasesOSGi Implementation

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Typical Use CasesTypical Use Cases

Internet AccessPersonal CommunicationsHome AutomationHome SecurityHome Health Care MonitoringEntertainmentInformation managementTelematics (Automotive)

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Typical Use CasesTypical Use Cases

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Typical Use CasesTypical Use Cases

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OutlineOutline

What is OSGi TechnologyIntroduction

AllianceSpecificationsKey BenefitsOSGi Terminology

OSGi FrameworkService & BundleUse CasesOSGi Implementation

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Framework ImplementationFramework Implementation

IBM Lotus ExpeditorProSyst SoftwareKnopflerfish OSGi

Makewave (formerly Gatespace Telematics)

Equinox OSGi (Eclipse project)Objectweb Oscar

Apache Felix

Knopflerfish Installation (1)Knopflerfish Installation (1)

Software EnvironmentJRE 1.6.0_10Window XP

Download jar filehttp://www.knopflerfish.org/download.htmlCurrent release OSGi R4 - Knopflerfish 2.0.5Download knopflerfish_osgi_<version>.jar

Knopflerfish Installation (2)Knopflerfish Installation (2)Execute knopflerfish_osgi_<version>.jar

double-clicking on the distribution fileor by the command: java -jar knopflerfish_osgi_<version>.jar

Startup KnopflerfishStartup KnopflerfishChange the directory to the installation directory and start Knopflerfish

double-clicking on framework.jaror by the command: java -jar framework.jar

Eclipse – Develop OSGi BundleEclipse – Develop OSGi Bundle

Software EnvironmentEclipse 3.1-3.4http://www.eclipse.org/downloadsKnopflerfish plug-in for Eclipsehttp://www.knopflerfish.org/eclipse_plugin.html

Programming TutorialKnopflerfish tutorialhttp://www.knopflerfish.org/tutorials.htmlOscar Tutorialhttp://oscar-osgi.sourceforge.net/tutorial/