Apache Aries A Blueprint for developing with OSGi and JEE Valentin Mahrwald, IBM

What is OSGi? The dynamic module system for Java Services Life cycle Module Execution environment S e c u r i t y Bundles Hardware / OS

The dynamic module system for Java

Modularity Services Life cycle Module Execution environment S e c u r i t y Bundles Hardware / OS System Loader Extension Loader App 1 Loader App 2 Loader WebApp 1 Loader System Loader Extension Loader Bundle A Bundle C 1 Bundle B Bundle C 2 Traditional OSGi Import-Package: org.blah.util; version=[1.0.2,2.0.0) Export-Package: org.blah.util; version=1.5.0 Export-Package: org.blah.util; version=2.0.0

Dynamics Bundle life cycle Services Services Life cycle Module Execution environment S e c u r i t y Bundles Hardware / OS Bundle A Bundle B Bundle C S S'

Bundle life cycle

Services

Enterprise OSGi Java SE and EE technologies are often not OSGi aware Apache Aries JNDI Glue OSGI

Java SE and EE technologies are often not OSGi aware

Apache Aries Recent addition to Apache incubator OSGi as an application model Blueprint (standardized Spring) JNDI integration more to come

Recent addition to Apache incubator

OSGi as an application model

Blueprint (standardized Spring)

JNDI integration

more to come

Blueprint Example E-Commerce bundle <blueprint> <bean id=”shop” class=”org.example.ecomm.ShopImpl”> <property name=”billingService” ref=”billingService” /> </bean> <reference id=”billingService” interface=”org.example.bill.BillingService” /> </blueprint> class ShopImpl { private BillingService billingService; void setBillingService(BillingService srv) { … } void process(Order o) { … billingService.bill(o); … } } E-commerce

E-Commerce bundle

<blueprint> <bean id=”shop” class=”org.example.ecomm.ShopImpl”> <property name=”billingService” ref=”billingService” /> </bean> <reference id=”billingService” interface=”org.example.bill.BillingService” /> </blueprint>

Blueprint Example (2) Billing service bundle <blueprint> <service ref=”service” interface=”org.example.bill.BillingService” /> <bean id=”service” scope=”prototype” class=”org.example.bill.impl.BillingServiceImpl” /> </blueprint> class BilingServiceImpl implements BillingService { … void bill(Order o) { … } … } Billing

Billing service bundle

<blueprint> <service ref=”service” interface=”org.example.bill.BillingService” /> <bean id=”service” scope=”prototype” class=”org.example.bill.impl.BillingServiceImpl” /> </blueprint>

Blueprint dynamics E-commerce Billing [1.0.0] Billing [1.0.0] Billing [1.0.1] Billing [1.0.1] E-commerce E-commerce BP component

Where To Start OSGi Alliance http://www.osgi.org OSGi implementations http://www.eclipse.org/equinox/ http://felix.apache.org/ Apache Aries http://incubator.apache.org/aries/

OSGi Alliance

http://www.osgi.org

OSGi implementations

http://www.eclipse.org/equinox/

http://felix.apache.org/

Apache Aries

http://incubator.apache.org/aries/

Thanks! Questions?