JacekLaskowski 4Developers Modele SCA OSGi a JavaEE 26.03.2010

7/28/2019 JacekLaskowski 4Developers Modele SCA OSGi a JavaEE 26.03.2010

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Modele komponentoweSCA, OSGi, Distributed OSGi i

OSGi Enterprise

aJava EE

Jacek Laskowskihttp://www.JacekLaskowski.pl

Wersja z 26 marzec 2010 o 15:50:32
http://www.jaceklaskowski.pl/http://www.jaceklaskowski.pl/


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Ja...cek Laskowski

Pasjonat Korporacyjnej Javy (Java EE) i okolic Zaoyciel i liderWarszawa Java User Group Czonek grup rozwojowych Apache OpenEJB,

Apache Geronimo i in. BlogerNotatnika Projektanta Java EE

http://www.JacekLaskowski.pl Subowo: Specjalista od oprogramowania

IBM WebSphere (BPM) w IBM Polska
http://www.jaceklaskowski.pl/http://www.jaceklaskowski.pl/


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Pawe Stawicki napisa...

Ja bym chtnie zobaczy, jak si to wszystko

"skada do kupy". Sporo tu elementw, o ktrychmam co najwyej blade pojcie i ciekaw jestem,

jak je wszystkie razem skonfigurowa, poczy izbudowa aplikacj.


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Zacznijmy od pocztku.Krciutko


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Interfejs to zbir metod

z okrelonym sposobem ich wykonania(transport)


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Usuga to funkcjonalnodostpna za pomoc jednoznacznie

zdefiniowanego interfejsu(w tym i transportu)


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Komponent to modu systemuudostpniajcy usugi

bez odkrywania szczegwich implementacjijednostka funkcjonalna/usugowa


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Model komponentowy to zbir zasadokrelajcych

ramy poprawnego funkcjonowaniakomponentw


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CORBACommon Object Request Broker Architecture


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Rnice midzy...model komponentowy to model aplikacyjny?

A co ze szkielet (framework) i rusztowanie(scaffolding)

?

Nomenklatura i semantyka


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A wszystko zaczo si od...?


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package pl.jaceklaskowski.greeter;

publicinterface Greeter { public String sayHelloTo(String who);}

package pl.jaceklaskowski.greeter.impl;publicclass PolishGreeter implements Greeter { @Override

public String sayHelloTo(String who) { return"Witaj " + who;

}

}


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Brawa dla czowieka-kompilatora!


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JavaBeans aka POJO

JavaBeans technology is the componentarchitecture for the Java 2 Platform, Standard

Edition (J2SE). JavaBeans components (beans)are reusable software programs that you candevelop and assemble easily to create

sophisticated applications.

Za http://java.sun.com/javase/technologies/desktop/javabeans/index.jsp


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Pniej, znaczne skomplikowanie z...


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POJO + META-INF/ejb-jar.xml

...


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Enterprise JavaBeans (EJB)

Enterprise JavaBeans (EJB) technology is theserver-side component architecture for Java

Platform, Enterprise Edition (Java EE). EJB

technology enables rapid and simplifieddevelopment of distributed, transactional, secure

and portable applications based on Javatechnology.

Za http://java.sun.com/products/ejb/


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Aby pniej uproci?


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POJO + META-INF/beans.xml


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Spring Framework

Springisa layered Java/J2EEapplication platform.

Spring includes: The most complete lightweightcontainer, providing centralized, automated

configuration and wiring of your applicationobjects. The container is non-invasive, capable of

assembling a complex system from a set ofloosely-coupled components (POJOs) in a

consistent and transparent fashion.

Za http://www.springsource.org/about


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Ale nie tylko!POJO + adnotacje rulez :-)


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Java Enterprise Edition (Java EE)

Java Platform, Enterprise Edition (Java EE) isthe industry standard forenterprise Java

computing.

The Java Platform, Enterprise Edition (JavaEE) reduces the cost and complexity of

developingmultitier, enterprise services.

Za http://java.sun.com/javaee/ orazJava Platform, Enterprise Edition (Java EE) Specification, v6
http://java.sun.com/javaee/http://java.sun.com/javaee/


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A w tle tli si coraz janiej...


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Manifest-Version: 1.0Bundle-ManifestVersion: 2Bundle-Name: Greeter ServiceBundle-SymbolicName: pl.jaceklaskowski.greeter.Greeter

Bundle-Version: 1.0.0Export-Package: pl.jaceklaskowski.greeter

POJO + META-INF/MANIFEST.MF


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OSGi

OSGitechnology is the dynamic module systemfor Java. The OSGi Service Platform provides

functionality to Java that makes Java the premierenvironment for software integration and thus for

development.

Za http://www.osgi.org/About/Technology


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OSGi warstwami

Za OSGi Service Platform Release 4 Version 4.2 Core Specification

registerService(String,Object,Dictionary)

registerService(String

[],Object,Dictionary)


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Majc podstawyw postaci Java EE, Spring i OSGi

zaczyna si prawdziwa,deklaratywna zabawa...

META-INF/spring/simpleservice.xml


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META-INF/spring/simpleservice-osgi.xml
http://www.springframework.org/schema/beanshttp://www.w3.org/2001/XMLSchema-instancehttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/beanshttp://www.w3.org/2001/XMLSchema-instancehttp://www.springframework.org/schema/osgihttp://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/osgihttp://www.springframework.org/schema/osgi/spring-osgi.xsdhttp://www.springframework.org/schema/osgi/spring-osgi.xsdhttp://www.springframework.org/schema/osgihttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/beanshttp://www.springframework.org/schema/osgihttp://www.w3.org/2001/XMLSchema-instancehttp://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.w3.org/2001/XMLSchema-instancehttp://www.springframework.org/schema/beans


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Spring Dynamic Modules for OSGi(tm) ServicePlatforms

=Spring Framework + OSGi


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OSGI-INF/blueprint/blueprint.xml
http://www.osgi.org/xmlns/blueprint/v1.0.0http://www.osgi.org/xmlns/blueprint/v1.0.0


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OSGi Blueprint Container

Blueprint Containerspecification defines adependency injection framework, specificallyforOSGi bundles, that understands the unique

dynamic nature of services.

This Blueprint Container specification is derivedfrom the Spring Dynamic Modules project.

Za 121. Blueprint Container Specification w OSGi Service PlatformRelease 4 Version 4.2 Enterprise Specification


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Wychodzimy poza ramy pojedynczej JVM...

Gotowi?

bli l A ti t i l t B dl A ti t {


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public class Activator implements BundleActivator {

private ServiceRegistration registration;

public void start(BundleContext bc) throws Exception {

Dictionary props = new Hashtable();

props.put("service.exported.interfaces", "*");props.put("service.exported.configs",

"org.apache.cxf.ws");props.put("org.apache.cxf.ws.address",

"http://localhost:9090/greeter");

registration =bc.registerService(GreeterService.class.getName(),

new GreeterServiceImpl(), props);

}

public void stop(BundleContext bc) throws Exception {registration.unregister();

}}


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Distributed OSGito potoczna nazwa dla

Remote Services (OSGi Compendium spec)

orazRemote Service Admin Service (OSGi

Enterprise spec)


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Enterprise OSGito zbir specyfikacji w

OSGi Service Platform Release 4 Version 4.2

Enterprise SpecificationdlaBlueprint Container, Remote Service Admin

Service, JTA, JMX, JDBC, JNDI, JPA, Web i SCA


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Kto wspomnia o SCA?! W kocu!

Service Component Architecture


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Service Component Architecture(SCA)

Service Component Architecture (SCA) is a setof specifications which describe a modelfor

building applications and systems using a

Service-Oriented Architecture. SCA extends andcomplements prior approaches to implementing

services, and SCA builds on open standards suchas Web services.

Za http://www.osoa.org/display/Main/Service+Component+Architecture+Home


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POJO + META-INF/*.composite

SCA OSGi S i i J EE


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SCA, OSGi, Spring i Java EE

W OSGi Enterprise SCA Configuration TypeSpecification

W SCA implementation.*:

*.jee, *.web i *.ejb dla artefaktw Java EE *.osgi, *.java i *.spring dla OSGi, Java i Spring


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Wicej kodu zamiast gadania?!

Musz Was rozczarowa, wicej nie bdzie,bo nie ma by!


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Podsumow(yw)anie

P i d kl t


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Programowanie deklaratywne

POJO Adnotacje Pliki konfiguracyjne (czsto opcjonalne)

META-INF/beans.xml,WEB-INF/applicationContext.xml Spring

META-INF/MANIFEST.MF OSGi

META-INF/*.composite SCA META-INF/ejb-jar.xml EJB (Java EE)

d i k h i i


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rodowiska uruchomieniowe

OSGi Apache Felix, Eclipse Equinox Distributed OSGi (d-OSGi) Apache CXF,

Eclipse ECF

Enterprise OSGi (ent-OSGi) Apache Aries,Eclipse Virgo (Spring-DM) SCA Apache Tuscany, Eclipse SCA Tools

D l l kt


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Dalsza lektura

OSGi Service Platform Release 4 Version 4.2Core Specificationhttp://www.osgi.org/Download/File?url=/download/r4v42/r4.core.pdf

OSGi Service Platform Release 4 Version 4.2

Compendium Specificationhttp://www.osgi.org/Download/File?url=/download/r4v42/r4.cmpn.pdf OSGi Service Platform Release 4 Version 4.2

Enterprise Specificationhttp://www.osgi.org/Download/File?url=/download/r4v42/r4.enterprise.pdf

Service Component Architecture Specificationshttp://www.osoa.org/display/Main/Service+Component+Architecture+Specifications


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Modele komponentoweSCA, OSGi, Distributed OSGi iOSGi Enterprise

aJava EE

Jacek Laskowskihttp://www.JacekLaskowski.pl

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JacekLaskowski 4Developers Modele SCA OSGi a JavaEE 26.03.2010