EclipseRT

An Introduction to EclipseRT and OSGi
Chris Aniszczyk
Principal Software Engineer
[email protected]
http://twitter.com/caniszczyk
June 23, 2008
Confidential | Date | Other Information, if necessary
© 2002 IBM Corporation
Agenda
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OSGi and an Eclipse History Lesson
EclipseRT
Toast
Stackless Stacks, Equinox and CODA
Summary
Q&A
Agenda
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
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

OSGi and an Eclipse History Lesson
EclipseRT
Toast
Stackless Stacks, Equinox and CODA
Summary
Q&A
OSGi in 10 minutes...
• The dynamic module system for java
• What’s a module?
“Modular programming is a software design technique
that increases the extent to which software is composed
from separate parts, called modules. Conceptually,
modules represent a separation of concerns, and
improve maintainability by enforcing logical boundaries
between components.”
JARs != Modules
• JARs are deployment artifacts
• JARs have dependencies
• They are not modules... missing crucial information
 identifier (file name isn’t good enough)
 version
 vendor
 exports
 dependencies
;(
How does OSGI help?
• OSGi Bundle == Module
• Just a JAR with module related metadata
 identifier
 version
 vendor
 exports
 dependencies (imports)
;)
Community of Bundles
OSGi Application
Bundle A
Bundle D
Bundle X
Bundle Z
Bundle C
Bundle B
Bundle G
Bundle E
Bundle F
Bundle Y
Bundle H
Bundles, Metadata and the MANIFEST.MF
Manifest-Version: 1.0
Bundle-ClassPath: junit.jar
Bundle-Vendor: Eclipse.org
Bundle-Localization: plugin
Bundle-RequiredExecutionEnvironment: J2SE-1.3
Bundle-Name: JUnit3
Bundle-SymbolicName: org.junit
Export-Package: junit.awtui;version="3.8.2",junit.extensions;version="
3.8.2",junit.framework;version="3.8.2",junit.runner;version="3.8.2",j
unit.swingui;version="3.8.2",junit.swingui.icons;version="3.8.2",juni
t.textui;version="3.8.2"
Bundle-Version: 3.8.2.v20090203-1005
Bundle-ManifestVersion: 2
Quick Toast Demo - Modularity in Action
OSGi in Details
• OSGi Alliance
o
Worldwide consortium of technology innovators that advances OSGi
technology
• OSGi Technology
o
o
Set of specifications that define a module system for Java
Enables modular programming for Java
• Originally designed for embedded systems...
o
Home automation... set-top boxes... vehicles...
• Now in widespread use in desktop and servers...
OSGi Alliance
• An open standards organization founded in March 1999
 Founded by Ericsson, IBM, Motorola and Sun Microsystems
• Five expert groups that produce specifications
 Core Platform
 Enterprise
 Mobile
 Vehicle
 Residential
• Now ~100 members
 IBM, Oracle, Tibco, Siemens, SAP, Motorola, Red Hat...
OSGi Technology
• Bundles
 OSGi modules made by the developers
• Services
 Connects bundles in a dynamic way by offering a publish-find-bind model
• Life Cycle
 API to install, start, stop, update and uninstall bundles
• Modules
 Defines how a bundle can import and export code
• Security
 Handles the security aspects, think permissions
• Execution Environment
 Defines what methods and classes are available in a specific platform
OSGi API: BundleContext
• Represents the system
• Unique context supplied to each bundle
• Find, register services
• Install bundles
• Register listeners
• Get properties
OSGi API: BundleActivator
• No main()
• Each bundle is self-contained
• Some need initialization
 HTTP bundle might start server on port 80
• Implement start() and stop()
• Can be called at any time on any thread
Bundle Lifecycle
• OSGi is dynamic
• Bundles can come and go!
OSGi Specifications
• Two major specifications
• Core Specifications
 Covers the core layers of OSGi
• Service Compendium
 Contains a variety of useful services
OSGi Specification Releases
• OSGi Release 1 (R1): May 2000
• OSGi Release 2 (R2): October 2001
• OSGi Release 3 (R3): March 2003
• OSGi Release 4 (R4): October 2005
 Core Specification (R4 Core): October 2005
 Mobile Specification (R4 Mobile / JSR-232): September 2006
• OSGi Release 4.1 (R4.1): May 2007 (AKA JSR-291)
• OSGi Release 4.1 (R4.2): (Summer 2009)
• OSGi EEG spec coming in 4Q09
OSGi Frameworks
• There’s a lot of OSGi framework implementations...
OSGi Framework Implementations
• Equinox (open source)
 Reference implementation for the core framework and various services
 Base runtime for EclipseRT
• Felix (open source)
 Implementation developed at Apache
 Ships with GlassFish
• Knopflerfish (open source)
 BSD license
• Concierge (open source)
 Highly optimized and tiny R3 implementation
 Runs in tiny devices
• Many other commercial and private implementations
How does this relate to Eclipse?
• Eclipse had its own non-standard plug-in model
• OSGi and old Eclipse plug-in model were similar
What happened?
• The world didn’t need two modular systems
• Eclipse went to OSGi in 3.0 with Equinox*
o
o
Eclipse needed something robust and standard
Put OSGi on the map!
*http://portal.acm.org/citation.cfm?id=1086616
Agenda

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

OSGi and an Eclipse History Lesson
EclipseRT
Toast
Stackless Stacks, Equinox and CODA
Summary
Q&A
Eclipse? Enterprise? Runtimes? What?
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Eclipse is a trusted source of development tools
However, Eclipse is more than just tools!
There are 100+ Eclipse.org projects
Eclipse provides a wide selection of...
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Runtime Containers
Middleware
Enterprise Frameworks
What is EclipseRT?
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EclipseRT is the name given to the runtime projects
http://eclipse.org/eclipsert/whitepaper/eclipseRT.php
EclipseRT-related Projects at Eclipse.org
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Equinox
Riena
RAP
EMF++
BIRT
EclipseLink
ECF
Gemini
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eRCP
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Swordfish
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Jetty
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GEF
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SMILA
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e4
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Higgins
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Virgo
http://www.eclipse.org/projects
EclipseRT - UI Layers
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RCP and Riena for the desktop
RAP for the web
EclipseRT - Runtimes
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Equinox
Jetty
Virgo (formerly SpringDM)
EclipseRT - Persistence
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EclipseLink (formerly known as TopLink)
EclipseRT - BI / Reporting
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Business Intelligence and Reporting Tools (BIRT)
Common Denominator?
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It’s all OSGi based!
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http://www.osgi.org
Infrastructure-related projects
Modular philosophy
Realizing Eclipse value, in runtimes
EclipseRT Adopters
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Jazz
SpringDM (Gemini)
SAP
GlassFish
Oracle
JP Morgan
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Lotus
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NASA
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Infor
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Websphere
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US Army
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...
http://eclipse.org/eclipsert/case_studies/case_studies.php
The Software Landscape
How did we get here?
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Software complexity and skyscrapers
Developers will specialize further in order to cope with
the complexity of the systems they build
Lack of a common component model hurt us...
Solid foundations and frameworks will save us
Agenda






OSGi and an Eclipse History Lesson
EclipseRT
Toast
Stackless Stacks, Equinox and CODA
Summary
Q&A
Toast Overview
• Fleet management system
• Client = Vehicle head unit
• Server = Backend business logic/data
Vehicle discovery/tracking
Dynamic provisioning
Emergency reporting
Remote control
Google Earth/Maps
Open source
Extensible client UI
Lots of opportunities
• Full version open source at Eclipse
http://wiki.eclipse.org/Toast
Toast Modules
Toast Modules
http://wiki.eclipse.org/Toast
Technology in Toast
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Equinox
p2
ECF
BIRT
RCP
RAP
Jetty
EclipseLink
http://wiki.eclipse.org/Toast
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Derby
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Amazon EC2
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SLP
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Twitter
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JavaScript
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Google Earth
Agenda
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

OSGi and an Eclipse History Lesson
EclipseRT
Toast
Stackless Stacks, Equinox and CODA
Summary
Q&A
What makes Toast possible?
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OSGi and Equinox
Modularity
API
CODA
Monolithic Middleware and Stackless Stacks
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Traditional middleware is monolithic; a comfortable
place to run applications but comes with a lot of
baggage
Ideally, you only want to run what you need
EclipseRT allows you to specialize your own enterprise
stack based on your needs via Equinox and OSGi
http://www.redmonk.com/jgovernor/2008/02/05/osgi-and-the-rise-of-the-stackless-stack-just-in-time/
OSGi and Equinox
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Equinox is an OSGi runtime framework implementation
Equinox is the foundation of EclipseRT
Equinox provides a common component model and
runtime via OSGi
Allows you to specialize the enterprise stack for your
application’s needs
We all this component oriented approach CODA...
Component Oriented Development and Assembly
Multiple
Component
Producers
Customize
Components
Individual
Solutions
http://www.eclipse.org/equinox-portal/whitepaper/20080310_equinox.php
Platforms
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Platforms are all about components
EclipseRT and CODA enables you to build platforms
Example: NASA and the Ensemble platform
Agenda






OSGi and an Eclipse History Lesson
EclipseRT
Toast
Stackless Stacks, Equinox and CODA
Summary
Q&A
Summary
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Eclipse is more than just a tools framework!
Eclipse is evolving into runtimes via EclipseRT
EclipseRT allows you to build your own stacks
The tight integration between Eclipse tools and
EclipseRT provides a great developer experience
EclipseRT and CODA is the future of runtime
technology at Eclipse
http://www.eclipse.org/eclipsert
Question and Answers?