OSGi Devcon 2009 Keynote

Europe vrijdag 26 juni 2009

vrijdag 26 juni 2009

Peter Kriens OSGi Evangelist Europe OSGi Next vrijdag 26 juni 2009

OSGi Service Platform Core Specification vrijdag 26 juni 2009

Planning 4.2 • Core released for approval June 10 • Working on the ﬁnal draft for Compendium as we speak • Compendium : July 10 • Enterprise Release Autumn • Residential Release Spring 2010 vrijdag 26 juni 2009

Legend vrijdag 26 juni 2009

Legend Bundle A Bundle B vrijdag 26 juni 2009

Legend Bundle A Service Bundle B vrijdag 26 juni 2009

Legend Bundle A getService Service registerService Bundle B vrijdag 26 juni 2009

Legend Bundle A getService Bundle Service C registerService Bundle B vrijdag 26 juni 2009

Legend Bundle A getService Bundle Service addServiceListener C registerService Bundle B vrijdag 26 juni 2009

Legend Bundle A getService Call/Dependency Bundle Direction Service addServiceListener C registerService Bundle B vrijdag 26 juni 2009

Core • Launching • Bundle Tracker • Bundle-License Header • Service Hooks • Negative Permissions vrijdag 26 juni 2009

Launching • To be inside a framework … • Or outside a framework ... • That’s the question! vrijdag 26 juni 2009

Launching • Standardizes launching different frameworks • Will enable generic launchers • Allows you to embed a framework in your application! vrijdag 26 juni 2009

Launching Map<String,String> p = new HashMap<String,String>(); List<String> impls = getMetaInfServices( loader, FrameworkFactory.class.getName()); if (impls.size() != 1) throw new RuntimeException( "Too many frameworks: "+ impls); Class<?> clazz = loader.loadClass(impls.get(0)); FrameworkFactory factory = (FrameworkFactory) clazz .newInstance(); Framework fw = factory.newFramework(p); Bundle b = fw.installBundle( “http://.../load/…”); b.start(); vrijdag 26 juni 2009

Bundle Tracker • Simple tool a la Service Tracker to track bundles • Very useful for extenders • Bundles that provide additional functionality based on data in a bundle • Tracks a set of states • Handles all concurrency issues vrijdag 26 juni 2009

Service Hooks • FindHook • Intercept getServiceReference(s) • EventHook • Intercept Service Event delivery • ListenerHook • Find out who is listening to what vrijdag 26 juni 2009

Service Hooks Bundle A Bundle B vrijdag 26 juni 2009

Service Hooks Bundle A Proxy Bundle Bundle B vrijdag 26 juni 2009

Service Hooks Bundle A FindHook Proxy EventHook Bundle Bundle B vrijdag 26 juni 2009

Service Hooks Bundle A ListenerHook FindHook Proxy EventHook Bundle Bundle B vrijdag 26 juni 2009

Negative Permissions • Java 2 Permissions are only positive • That is, you grant a permission P • PackagePermission(com.acme,IMPORT) • Very hard to say, all permissions except P • Lack of deny permissions vrijdag 26 juni 2009

Negative Permissions DENY { [...BundleSignerCondition "cn=*, o=ACME" "!" ] (...PackagePermission "com.acme.secret.*" "import,exportonly" ) } ALLOW { (...PackagePermission "*" "*" ) } vrijdag 26 juni 2009

Compendium • Initial Provisioning • Bundle Tracker • Declarative Services • Remote Services • Blueprint Extender vrijdag 26 juni 2009

Remote Services • RFC 119 • Formerly Distributed OSGi • Distribution Software uses services to: • Maps a service to/from a remote system • Uses a service to abstract a communication endpoint vrijdag 26 juni 2009

Remote Services Distribution Distribution Provider Provider X’ Bundle B vrijdag 26 juni 2009

Remote Services Distribution Distribution X Provider Provider X’ Bundle B vrijdag 26 juni 2009

Remote Services Bundle A Distribution Distribution X Provider Provider X’ Bundle B vrijdag 26 juni 2009

Remote Services Bundle A Distribution Distribution X Provider Provider exports X’ Bundle B vrijdag 26 juni 2009

Remote Services Bundle A Distribution Distribution X Provider Provider exports imports X’ Bundle B vrijdag 26 juni 2009

Remote Services Bundle A Distribution Distribution X Provider Provider exports imports X’ Bundle B Framework 1 Framework 2 vrijdag 26 juni 2009

Remote Services • Service Properties define the interaction • Intents specify the required/provided capabilities • Filters used to match • Service Component Architecture (SCA) • Interaction specified, not mandated • Flexible configuration options vrijdag 26 juni 2009

Service Properties Distribution Provider <other properties> <other properties> service.exported.intents service.intents service.exported.intents service.exported.intents.extra service.imported service.exported.interfaces objectClass service.exported.configs service.imported.configs remote.intents.supported remote.configs.supported Framework 1 Framework 2 vrijdag 26 juni 2009

Service Properties Distribution Provider <other properties> <other properties> service.exported.intents service.intents service.exported.intents service.exported.intents.extra service.imported service.exported.interfaces objectClass service.exported.configs service.imported.configs endpoint remote.intents.supported remote.configs.supported Framework 1 Framework 2 vrijdag 26 juni 2009

Blueprint Extender • RFC 124 • Provides Spring DM Functionality • Blueprint Extender uses XML deﬁnitions in bundle to create & wire application objects • Namespace Handler services, not yet :-( • Provides damping • Proxies services vrijdag 26 juni 2009

Blueprint Extender XML vrijdag 26 juni 2009

Blueprint Extender Blueprint XML Container vrijdag 26 juni 2009

Blueprint Extender Blueprint XML Container BeanMetadata ServiceMetadata Reference Metadata vrijdag 26 juni 2009

Blueprint Extender Blueprint XML Container BeanMetadata Bean ServiceMetadata Reference Metadata vrijdag 26 juni 2009

Blueprint Extender Blueprint XML Container BeanMetadata Bean ServiceMetadata Service Reference Metadata vrijdag 26 juni 2009

Blueprint Extender Blueprint XML Container BeanMetadata Bean ServiceMetadata Service Reference Metadata Reference vrijdag 26 juni 2009

Blueprint Extender Application Objects Blueprint XML Container BeanMetadata Bean ServiceMetadata Service Reference Metadata Reference vrijdag 26 juni 2009

Metadata Null NonNull Props Metadata Metadata Metadata IdRef Value Component Collection Map Metadata Metadata Metadata Metadata Metadata Ref Map Metadata Entry Service Bean Service Reference Target Metadata Metadata Metadata Ref Reference Bean Bean Collection Metadata Property Argument Metadata Registration Listener Listener vrijdag 26 juni 2009

Damping Reference service object service App proxy object service object vrijdag 26 juni 2009

Damping Reference service object App proxy service object vrijdag 26 juni 2009

Damping Ref-list service proxy object service App List proxy object service proxy object vrijdag 26 juni 2009

Enterprise • Transactions • JDBC Database Access • JMX • JNDI • JPA • Connectors vrijdag 26 juni 2009

Experimental • TSL • Nested Frameworks • OBR vrijdag 26 juni 2009

TSL • A Tiny Script Language • Feels like a shell • Acts like a script language • Uses reﬂection, but simpliﬁes syntax • No new commands • Will become Felix project vrijdag 26 juni 2009

TSL Telnet Console ... Shell Shell Shell OSGi Command Convert. Shell Converter ThreadIO Eclipse TSL Thread Convert. Impl IO * Felix osgi.command.name=xxx Convert. osgi.command.function=yyy Frame Basic ... Work Cmnds Cmnds Cmnds vrijdag 26 juni 2009

TSL $ echo Hello World Hello World $ echo <bundle 1> initial@reference:file:org.eclipse.osgi.util_3.1.200.v200 70605.jar/ [1] $ ls eclipse eclipse.ini load runner $ ls /Ws aQute felix-trunk osgi osgi-books vrijdag 26 juni 2009

TSL $ <bundle 6> headers Tool Bnd-0.0.169 Bundle-Activator aQute.fileinstall.FileInstall Export-Package aQute.fileinstall ... Created-By 1.6.0_01 (Sun Microsystems Inc.) Bnd-LastModified 1184160147361 Bundle-Version 1.3 Bundle-ManifestVersion2 Manifest-Version 1.0 Import-Package aQute.fileinstall, ... Bundle-Name biz.aQute.fileinstall Bundle-Description This bundle watches a .... Bundle-SymbolicName biz.aQute.fileinstall vrijdag 26 juni 2009

TSL $ help={each <<$it class> declaredmethods> {$it name }} aQute.shell.runtime.Closure@90a284 $ help <bundle 6> loadClass getResource ... checkLoader closeBundleLoader getLoaderProxy $ echo $exception E: java.lang.NullPointerException $ echo $exception java.lang.NullPointerException $ $exception printstacktrace $ // the output is temporarily on reall stderr ... vrijdag 26 juni 2009

Nested Frameworks • Application Server Vendors want scoping of applications … • Basic Idea OSGi is: • The Application == the set of installed bundles • Compromise: • All Frameworks to be nested vrijdag 26 juni 2009

Nested Frameworks System Bundle Framework P vrijdag 26 juni 2009

Nested Frameworks System Bundle Composite Bundle Framework P vrijdag 26 juni 2009

Nested Frameworks Framework C System Bundle Composite Bundle Framework P vrijdag 26 juni 2009

Nested Frameworks Framework C System Bundle System Bundle Composite Bundle Framework P vrijdag 26 juni 2009

Nested Frameworks Framework C System Bundle System Bundle Composite Surrogate Bundle Bundle Framework P vrijdag 26 juni 2009

Nested Frameworks Framework C System Bundle System Bundle Composite Surrogate Bundle Bundle App Bundle A Framework P vrijdag 26 juni 2009

Nested Frameworks Framework C System Bundle System Bundle Composite Surrogate Bundle Bundle App Bundle B App Bundle A Framework P vrijdag 26 juni 2009

Java Modularity vrijdag 26 juni 2009

Java Modularity 294 vrijdag 26 juni 2009

Java Modularity 294 vrijdag 26 juni 2009 7

Java Modularity 42 vrijdag 26 juni 2009

Java Modularity vrijdag 26 juni 2009

Java Modularity module vrijdag 26 juni 2009

Java Modularity module class Foo {} public class Bar { module int foo() {} } module interface Baz {} vrijdag 26 juni 2009

Java Modularity Visibility vs Accessibility vrijdag 26 juni 2009

Visibility Class Class S T vrijdag 26 juni 2009

Visibility Module System Class Class S T vrijdag 26 juni 2009

Accessibility public module package private vrijdag 26 juni 2009

Accessibility Class S vrijdag 26 juni 2009

Accessibility Class Class S T class vrijdag 26 juni 2009

Accessibility Class Class S T class Class U package vrijdag 26 juni 2009

Accessibility module Class V Class Class S T class Class U package vrijdag 26 juni 2009

Accessibility module Class V Class Class Class W S T class Class U package vrijdag 26 juni 2009

Is JSR 294 a Meta Module System? (Implemented by OSGi™, Jigsaw, Guice, …) vrijdag 26 juni 2009

Is JSR 294 a Meta Module System? (Implemented by OSGi™, Jigsaw, Guice, …) No Java™ Standard for vrijdag 26 juni 2009 Modules!

OSGi Modules: Bundle = Module Bundle module vrijdag 26 juni 2009

OSGi Modules: Bundle = Multiple Modules Bundle module A module B vrijdag 26 juni 2009

OSGi Modules: Modules Cross Bundles Bundle A Bundle B module vrijdag 26 juni 2009

OSGi Modules: Nested? Bundle module A module B vrijdag 26 juni 2009

Module Dependencies Bundle A Bundle B module A module B vrijdag 26 juni 2009

Module Dependencies Bundle A Bundle B module A module B requires provides permits vrijdag 26 juni 2009

Module Dependencies ? Bundle A Bundle B module A module B requires provides permits vrijdag 26 juni 2009

vrijdag 26 juni 2009

Europe vrijdag 26 juni 2009

OSGi Devcon 2009 Keynote

by Peter Kriens

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OSGi Devcon 2009 Keynote Presentation Transcript