Enterprise Development with What needs to be done to run JEE like - - PowerPoint PPT Presentation

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Enterprise Development with What needs to be done to run JEE like - - PowerPoint PPT Presentation

Feb 04, 2024 271 likes •1.28k views

Enterprise Development with What needs to be done to run JEE like applications inside Karaf? @anierbeck - Karaf PMC, Apache Member - OPS4j Pax Web Project Lead - Senior IT Consultant @codecentric - co-Author of Apache Karaf Cookbook 3

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Enterprise Development

with …

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What needs to be done to run JEE like applications inside Karaf?

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2014-­‑10-­‑23 3

@anierbeck

  • Karaf PMC, Apache Member
  • OPS4j Pax Web Project Lead
  • Senior IT Consultant @codecentric
  • co-Author of Apache Karaf Cookbook
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Agenda

  • Enterprise Requirements
  • OSGi with Karaf
  • Enterprise Requirements on Karaf
  • Specialties
  • Http Service
  • Cellar - or how to cluster Karaf
  • Summary

2014-­‑10-­‑23 4

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Enterprise Requirements

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Enterprise Java

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI JAX-RPC SAAJ

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OSGi with Karaf

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OSGi - a very brief introduction

  • Modular
  • OSGi Bundles:
  • High Cohesion (One classloader/bundle)
  • Low Coupling (Package Import/Export)
  • Versioning per bundle ( [1.0,2,0) )
  • Service Registry

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What is Karaf

  • Container
  • OSGi Applications
  • Ligthtweight
  • expandable to Full Enterprise support
  • Covers all major needs
  • Logging
  • Deployment
  • Configuration

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Karaf - Overview

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Console Admin OSGi Framework - Felix / Equinox Logging Deployer Config JMX SSH Blueprint

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Enterprise requirements on Karaf

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Karaf

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI JAX-RPC SAAJ

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Enterprise - Pax Web

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI JAX-RPC SAAJ

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Enterprise - Pax CDI

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI JAX-RPC SAAJ

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Enterprise - Aries

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI JAX-RPC SAAJ

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Enterprise - Tomee aka OpenEJB

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RPC JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI SAAJ

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Enterprise - CXF

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RPC JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI SAAJ

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Enterprise - ActiveMQ

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RPC JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI SAAJ

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Enterprise - Cellar

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RPC JAX-RS JAXR JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI SAAJ

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Enterprise - Karaf with features

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 Bean Validation JAX-WS JAX-RPC JAX-RS JAXR SAAJ JAXB JMS JAAS JASPIC JACC JSR-88 JCA JavaMail JSR-77 RMI JNDI

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Specialties

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JPA - Karaf

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<persistence xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
 http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
 version="2.0" >
 <persistence-unit name="cookbook" transaction-type="JTA">
 <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
 <jta-data-source>

  • sgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/cookbook)

</jta-data-source>
 <class>de.nierbeck.apachecon.persistence.entity.Book</class>
 <class>de.nierbeck.apachecon.persistence.entity.Recipe</class> <exclude-unlisted-classes>true</exclude-unlisted-classes>
 <properties>
 <property name="openjpa.Log" value="slf4j" />
 <property name="openjpa.RuntimeUnenhancedClasses" value="supported" />
 <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema"/>
 </properties>
 </persistence-unit>
 </persistence>

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JPA - Karaf

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<persistence xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
 http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
 version="2.0" >
 <persistence-unit name="cookbook" transaction-type="JTA">
 <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
 <jta-data-source>

  • sgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/cookbook)

</jta-data-source>
 <class>de.nierbeck.apachecon.persistence.entity.Book</class>
 <class>de.nierbeck.apachecon.persistence.entity.Recipe</class> <exclude-unlisted-classes>true</exclude-unlisted-classes>
 <properties>
 <property name="openjpa.Log" value="slf4j" />
 <property name="openjpa.RuntimeUnenhancedClasses" value="supported" />
 <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema"/>
 </properties>
 </persistence-unit>
 </persistence>

To have this blueprint JNDI is needed

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JTA - Karaf

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<blueprint default-activation=„eager" xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jpa="http://aries.apache.org/xmlns/jpa/v1.0.0" xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.0.0" xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd"> <bean id="cookBookServiceImpl" class="de.nierbeck.apachecon.persistence.dao.CookBookServiceImpl"> <jpa:context property="em" unitname="cookbook" /> <tx:transaction method="*" value="Required" /> </bean> <service id="cookBookService" ref="cookBookServiceImpl" interface="de.nierbeck.apachecon.persistence.api.CookBookService" /> </blueprint>

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JTA - Karaf

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<blueprint default-activation=„eager" xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jpa="http://aries.apache.org/xmlns/jpa/v1.0.0" xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.0.0" xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd"> <bean id="cookBookServiceImpl" class="de.nierbeck.apachecon.persistence.dao.CookBookServiceImpl"> <jpa:context property="em" unitname="cookbook" /> <tx:transaction method="*" value="Required" /> </bean> <service id="cookBookService" ref="cookBookServiceImpl" interface="de.nierbeck.apachecon.persistence.api.CookBookService" /> </blueprint> To have this blueprint JPA and JTA is needed

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Client - Karaf

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<?xml version="1.0" encoding="UTF-8"?> <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" default-activation="lazy"> <reference id="cookBookService" interface="de.nierbeck.apachecon.persistence.api.CookBookService" /> <command-bundle xmlns="http://karaf.apache.org/xmlns/shell/v1.1.0"> <command> <action class="de.nierbeck.apachecon.commands.CreateBook"> <property name="bookService" ref="cookBookService" /> </action> </command> ... </command-bundle> </blueprint>

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Demo

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Persistence

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Client

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Client Shell

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Client - Shell

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Client Shell

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Client - Shell

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Http Service with …

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HTTP Service

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  • Using an Activator:

final HttpContext httpContext = httpService .createDefaultHttpContext(); // register the BookServlet // first wait for the DAO-Service CookBookService cookBookService; ServiceReference<CookBookService> serviceReference = bundleContext .getServiceReference(CookBookService.class); cookBookService = bundleContext.getService(serviceReference); //now create the servlet ViewBookServlet viewBookServlet = new ViewBookServlet(); //set the DAO to the Servlet viewBookServlet.setCookBookService(cookBookService); final Dictionary<String, Object> initParams = new Hashtable<String, Object>(); try { httpService.registerServlet("/book", // alias viewBookServlet, initParams, httpContext);

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Whiteboard

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  • Using the whiteboard approach via Activator

public void start(BundleContext bc) throws Exception { bundleContext = bc; // first wait for the DAO-Service CookBookService cookBookService; ServiceReference<CookBookService> serviceReference = bundleContext .getServiceReference(CookBookService.class); cookBookService = bundleContext.getService(serviceReference); // create new Servlet ViewBookServlet cookBookViewServlet = new ViewBookServlet(); cookBookViewServlet.setCookBookService(cookBookService); registerServiced = bundleContext.registerService(Servlet.class, cookBookViewServlet, null); }

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Whiteboard

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  • Using the whiteboard approach via Blueprint

<blueprint default-activation="eager"> <reference id="cookBookService" interface="de.nierbeck.apachecon.persistence.api.CookBookService" /> <bean id="viewBookServlet" class="de.nierbeck.apachecon.view.ViewBookServlet" > <property name="cookBookService" ref="cookBookService"/> </bean> <service id="servletService" interface="javax.servlet.Servlet" ref="viewBookServlet" /> </blueprint>

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Servlet 3.0 - Just annotation

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@WebServlet(urlPatterns = "/book") public class ViewBookServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 1L; @Inject @OsgiService CookBookService cookBookService; @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { ... } }

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LOST?

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Registering - Servlet

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Pax-Web 
 HTTP Service Service- Registry Servlet

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Registering - Servlet

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Pax-Web 
 HTTP Service Service- Registry Servlet Registerd

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Registering - Servlet

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Pax-Web 
 HTTP Service Service- Registry Servlet Registerd Registerd

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Registering - Whiteboard

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Pax-Web 
 WebContainer Service-Tracker Service- Registry Servlet

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Registering - Whiteboard

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Pax-Web 
 WebContainer Service-Tracker Service- Registry Servlet Registerd

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Registering - Whiteboard

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Pax-Web 
 WebContainer Service-Tracker Service- Registry Servlet Registerd Registerd

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Registering - Whiteboard

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Pax-Web 
 WebContainer Service-Tracker Service- Registry Servlet Registerd Registerd

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Registering - WAR

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Pax-Web WebContainer Pax-Web 
 WAR Extender Service- Registry WAB-Bundle Servlet

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Registering - WAR

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Pax-Web WebContainer Pax-Web 
 WAR Extender Service- Registry WAB-Bundle Servlet Registerd

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Registering - WAR

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Pax-Web WebContainer Pax-Web 
 WAR Extender Service- Registry WAB-Bundle Servlet Registerd Registerd

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Registering - WAR

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Pax-Web WebContainer Pax-Web 
 WAR Extender Service- Registry WAB-Bundle Servlet Registerd Registerd

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Servlet + JPA / Service

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Blueprint 
 Extender Pax-Web 
 WAR Extender JPA-Bundle Service- Registry JPA - Service WEB-Bundle Servlet

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Servlet + JPA / Service

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Blueprint 
 Extender Pax-Web 
 WAR Extender JPA-Bundle Service- Registry JPA - Service WEB-Bundle Servlet Registerd

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Servlet + JPA / Service

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Blueprint 
 Extender Pax-Web 
 WAR Extender JPA-Bundle Service- Registry JPA - Service WEB-Bundle Servlet Registerd Injected

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Servlet + JPA / Service

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Blueprint 
 Extender Pax-Web 
 WAR Extender JPA-Bundle Service- Registry JPA - Service WEB-Bundle Servlet Registerd Registerd Injected

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Demo

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View

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View

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Cluster provided by Apache Karaf Cellar

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Cellar - Cluster Communication

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Cellar - Cluster Communication

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Hazelcast

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Cellar - Events

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

  • sgi:install mvn:groupId/artifactId/version

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

DEPRECATED

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Cellar - Distributing Bundles

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Node A Node B Node C Maven Repository

Hazelcast

DEPRECATED

cluster:install mvn:groupId/artifactId/version

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Cellar - RMI

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Group 1 Node A Consumes OSGi-Service Group 2 Node B Consumes OSGi-Service Node C Consumes OSGi-Service Node A Provides OSGi-Service Node B Provides OSGi-Service

Hazelcast

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cellar - Web session failover

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Node A

Hazelcast

DataBase Client Servlet Filter Node B Servlet Filter

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Cluster - Demo

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Presentation Layer

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web.xml - Hazelcast

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  • Hazelcast for Session Replication

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <filter> <filter-name>hazelcast-filter</filter-name> <filter-class>com.hazelcast.web.WebFilter</filter-class> <!-- Name of the distributed map storing your web session objects

  • ->

<init-param> <param-name>map-name</param-name> <param-value>my-sessions</param-value> </init-param> <init-param> <param-name>sticky-session</param-name> <param-value>false</param-value> </init-param> </filter> <filter-mapping> <filter-name>hazelcast-filter</filter-name> <url-pattern>/*</url-pattern> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> <dispatcher>REQUEST</dispatcher> </filter-mapping> <listener> <listener-class>com.hazelcast.web.SessionListener</listener-class> </listener> </web-app>

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View

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View

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View

2014-­‑10-­‑23 57

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SUMMARY

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Enterprise - Karaf

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Servlet 3 JSF 2 JSP JPA 2 JTA CDI EJB 3.1 JAX-WS JAX-RPC JAX-RS JAXR SAAJ JAXB JMS JAAS RMI JNDI

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JEE with Karaf?

  • Adoptions needed? YES
  • Minor on Persistence - JNDI lookup
  • Minor on transaction - Blueprint JTA
  • Wiring of Services:
  • Use Blueprint
  • Use Servlet 3.0 with CDI - @OsgiService
  • Session Replication throughout cluster, it’s still standard

Hazelcast

2014-­‑10-­‑23 60

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Resources

  • @anierbeck
  • notitzblog.nierbeck.de
  • https://github.com/ANierbeck/karaf-enterprise-sample
  • www.codecentric.de
  • karaf.apache.org
  • https://ops4j1.jira.com/wiki/display/paxweb/Pax+Web
  • #karaf at irc.codehaus.org
  • https://www.packtpub.com/application-development/apache-karaf-cookbook
  • Pictures, mainly from flickr

2014-­‑10-­‑23 61

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THANKS FOR LISTENING

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Thanks to the Apache Community

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Questions

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Thanks