6.02. Intermediate - Creating the CXF SU

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We are going to create the main SU of our project : the CXF EJB proxy.

The Maven pom.xml

First of all, we create the pom.xml :

xmlpom.xmlsolid <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.apache.servicemix.examples</groupId> <artifactId>ejb-example</artifactId> <version>1.0-SNAPSHOT</version> </parent> <groupId>org.apache.servicemix.examples</groupId> <artifactId>ejb-cxf-su</artifactId> <packaging>jbi-service-unit</packaging> <name>Apache ServiceMix :: Examples :: EJB :: CXF SU</name> <dependencies> <dependency> <groupId>org.apache.servicemix</groupId> <artifactId>servicemix-cxf-se</artifactId> <version>2008.01</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>2.5.5</version> </dependency> <dependency> <groupId>jboss</groupId> <artifactId>jbossall-client</artifactId> <version>4.2.2.GA</version> </dependency> <dependency> <groupId>my.ejb.provider</groupId> <artifactId>ejb-client</artifactId> <version>1.0-SNAPSHOT</version> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*</include> </includes> </resource> </resources> <plugins> <plugin> <groupId>org.apache.servicemix.tooling</groupId> <artifactId>jbi-maven-plugin</artifactId> <version>3.2.3</version> <extensions>true</extensions> </plugin> </plugins> </build> </project>

We are using EJBs deploying in a JBoss application server : that's why we need the JBoss client dependency.
The EJB provider needs to provide the local and home interfaces (and eventually the stub) for the EJB server side.

JBI xbean.xml

Now we can setup the xbean.xml (in the src/main/resources directory) to expose our EJB :

xmlxbean.xmlsolid <beans xmlns:cxfse="http://servicemix.apache.org/cxfse/1.0" xmlns:myService="http://www.example.com/myService"> <bean id="jndiTemplate" class="org.springframework.jndi.JndiTemplate"> <property name="environment"> <props> <prop key="java.naming.factory.initial"> org.jnp.interfaces.NamingContextFactory </prop> <prop key="java.naming.provider.url"> jnp://localhost:1299 </prop> </props> </property> </bean> <bean id="ejbProxy" class="org.springframework.ejb.access.SimpleRemoteStatelessSessionProxyFactoryBean"> <property name="jndiName" value="ejb/myEJB"/> <property name="businessInterface" value="com.ejb.provider.MyEJB"/> <property name="homeInterface" value="com.ejb.provider.MyEJBHome"/> <property name="refreshHomeOnConnectFailure" value="true"/> <property name="cacheHome" value="true"/> <property name="lookupHomeOnStartup" value="true"/> <property name="resourceRef" value="false"/> <property name="jndiTemplate" ref="jndiTemplate"/> </bean> <cxfse:endpoint> <cxfse:pojo> <bean class="org.apache.servicemix.examples.MyEJBImpl"> <property name="proxy" ref="ejbProxy"/> </bean> </cxfse:pojo> </cxfse:endpoint> </beans>

Warning : only EJB Session Stateless can be exposed like this.

The EJB Proxy interface and implementation

You can see in the xbean that we need the service impl and interface for the CXF endpoint.

So we create the MyEJB interface :

javaMyEJB.javasolid package org.apache.servicemix.examples; import javax.jws.WebService; @WebService(targetNamespace = "http://www.example.com/myService", name = "MyEJB") public interface MyEJB { public String echo(String message); }

and the corresponding impl :

javaMyEJBImpl.javasolid /** * Service delegate to the AutomaticSimulationSession EJB * * @author <a href="mailto:onofre@fimasys.fr">Jean-Baptiste Onofré</a> */ package org.apache.servicemix.examples; import javax.jws.WebService; import javax.xml.ws.Holder; import com.ejb.provider.MyEJB; @WebService(serviceName = "myService", targetNamespace = "http://www.example.com/myService", endpointInterface = "org.apache.servicemix.examples.MyEJB") public class MyEJBImpl implements MyEJB { // simple Spring remote EJB proxy private AutomaticSimulationSession proxy; // getters and setters public void setProxy(AutomaticSimulationSession proxy) { this.proxy = proxy; } public AutomaticSimulationSession getProxy() { return this.proxy; } // service delegation methods /** * Delegation to the <code>echo</code> method of the <code>MyEJB</code> EJB. */ public String echo(String message) { try { return (proxy.echo(message).toString(); } catch(Exception exception) { exception.printStackTrace(); return "Error occurs : " + exception.getMessage(); } } }

Our EJB is now available in ServiceMix as a service registered in the NMR.

So now, we use the EJB service via a binding component

Proceed to the next step



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  1. sracem

    Hi,

    i have some questions,

    • the ejb interface and implementation must created on my servicemix project ( just create tow new classes then i add their implementations ), else how i create its?
    • about the ejb-client artifact: should i create ejb-client.jar file from my ejb project then i import it into maven? else i think that i should configure maven so can you please tell me what i do?
    • i want to use servicemix to send files to my ejb, so it is necessery to implement the next step?

    'im beginner so can you please add more explanation

    thanks