OSGi & JOnAS, OW2con11, Nov 24-25, Paris

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Leverage OSGiLeverage OSGiTMTM in Java EE in Java EETMTM business business applications with JOnASapplications with JOnAS

Guillaume Sauthier, Bull SASGuillaume Sauthier, Bull SAS

« Demonstrates how OSGiTM can help building business applications relying on an OSGiTM Application Server »

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

AgendaAgenda

I. Why building OSGi applications ?

II.Why do we need Java EE ?

III.Hybrid applications

IV.Best of breed application server

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Why building OSGi Why building OSGi applications applications ??

● Bundles are the building blocks● Installable, removable, even updatable

● At runtime, dynamically● Enables application composition (right size)● Fine control on dependencies

(package version, …)– Control what you actually use– Control what you want to expose– Avoids « classpath hell »

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Why building OSGi applications ?Why building OSGi applications ?

● OSGi promotes a service oriented approach● Services are registered under a contract (API) in the

service registry➢ Loose coupling

● Consumers require services using their contracts● No hard dependency on a given service provider

● Services are dynamic● Can come and go at any time

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Why building OSGi applications ?Why building OSGi applications ?

● Multiple and diverses component models helps to develop pure OSGi applications● They still are inter-operable !● Shield developers from inherent

programmation issues with services dynamism

● Make your choice after tasting :)

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Why do we need Java EE ?Why do we need Java EE ?

● Java EE skills are widely known● Large spectrum: from presentation to data layer

– Servlet, EJB, JPA● Data integrity

– Transaction (JTA)● Inter-operability

– With REST and SOAP(JAX-RS, JAX-WS)

– RMI/IIOP too (CORBA)

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Hybrid applications [1/2]Hybrid applications [1/2]

● Hybrid applications uses the best of the OSGi and Java EE world● Well known Java EE programming model

– Ease of development● A first glimpse at OSGi benefits

– Java EE components can use OSGiservices

– Java EE components are exposedas OSGi services (EJB)

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Hybrid applicationsHybrid applications [2/2] [2/2]

● OSGi based applications can also benefits from Java EE components● Servlets / HttpService● Data access layer

– Connection pooling– JPA modeling– Transactions support

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Best of breed application serverBest of breed application server [1/4] [1/4]

● JOnAS is it-self built on top of OSGi● Permits right sized execution platform definition● SOA principles applied to JOnAS technical services

maximizing testability and overall quality● Different execution profiles can be defined

– Micro : only the kernel– Full : All available services– All the in-between profiles ...

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Best of breed application serverBest of breed application server [2/4] [2/4]

● As Java EE implementor, JOnAS is well suited to provide the OSGi enterprise specifications :● HTTP Service (Servlet)● JDBC Service (Data access)● JTA Service (Transaction)● JNDI Service (Naming)● JCA Service (Connector / Resource Adapters)● JPA Service (High level data access)

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Best of breed application serverBest of breed application server [3/4] [3/4]

● JOnAS exposes the OSGi framework to the Java EE applications● OSGi services available to Java EE components

EJB 3 Service Implementation

OSGi BundleJava EE Module

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

Best of breed application serverBest of breed application server [4/4] [4/4]

● JOnAS exposes the OSGi framework to the Java EE applications● EJB business interfaces available to OSGi

EJB 3 Service Consumer

OSGi BundleJava EE / OSGi Module

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

ConclusionConclusion

● Java EE programming model is here to stay● Don't throw away your 'EJB in action' books !

● OSGi is gradually becoming more and more important● Apps will benefits from modularity and dynamism

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

QuestionsQuestions

??jonas.ow2.orgjonas.ow2.org

guillaume.sauthier@ow2.org@sauthieg

OW2Con 2011, November 23-24, Orange Labs, Paris.

www.ow2.org.

ThanksThanks

● http://www.flickr.com/photos/simonk/535063371

● http://www.flickr.com/photos/frank3/6053973411

● http://www.flickr.com/photos/nicokaiser/6070196415/

● http://www.flickr.com/photos/preppybyday/5084101811/

● http://www.flickr.com/photos/ludovicpoitou/5185031866

● http://www.flickr.com/photos/twak/3688809043/

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