How to get Container Managed Transactions (CMT) working with EJB 3.1, Hibernate 3.6, JPA 2.0 , JBoss and MySQL

I was trying to get CMT working with JPA EntityManagers and EJBs, but came up with the error below. (stack trance truncated):

Caused by: java.lang.RuntimeException: **Could not resolve @EJB reference: [EJB Reference: beanInterface 'com.mydomain.beans.TestBean2', beanName 'testBean2', mappedName 'null', lookupName 'null',** owning unit 'AbstractVFSDeploymentContext@2008455195{vfs:///Users/willtardy/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.0_Runtime_Server1300532851414/deploy/mydomainWeb.war}']
for environment entry: env/com.mydomain.action.SearchAction/testBean in unit AbstractVFSDeploymentContext@2008455195{vfs:///Users/willtardy/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.0_Runtime_Server1300532851414/deploy/mydomainWeb.war}

My classes:

Servlet that access the Session Bean:

public class SearchActionExample extends Action {
    @EJB
    private static TestBeanServiceInterface testBean;

    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
        testBean.addSource("TEST SOURCE NAME", 88, 99);
        Service service = testBean.findService("HBA", "MEL");

        return mapping.findForward("success");
    }
}

Remote interface:

@Remote
public interface TestBeanServiceInterface {
    // Source is my own custom entity
    void addSource(String sourceName, int newthreadsleeptime, int maxactivehttpclients);

    // Service is my own Custom entity    
    Service findService(String departureAirportCode, String arrivalAirportCode);
}

Stateless Session Bean definition:

@Stateless
public class TestBeanService implements TestBeanServiceInterface {

    @PersistenceContext(unitName="mydomainJPA")
    private EntityManager em;

    public void addSource(String sourceName, int newthreadsleeptime, int maxactivehttpclients) {
        Source source = new Source();
        source.setName(sourceName);
        source.setNewThreadSleepTime(newthreadsleeptime);
        source.setMaxActiveHttpClients(maxactivehttpclients);
        em.persist(source);
    }
    public Service findService(String departureAirportCode, String arrivalAirportCode) {
        String queryString = "from Service where departureairportcode = '" + departureAirportCode + "' and arrivalairportcode = '" + arrivalAirportCode + "'";
        Service service = (Service)em.createQuery(queryString).getSingleResult();
        return service;
    }
}

file persistnce.xml:

<?xml version="1.0" encoding="UTF-8"?>
<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="mydomainJPA" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:/MySqlDS</jta-data-source>
    <class>com.mydomain.entities.Service</class>
<class>com.mydomain.entities.Source</class>
    <properties>
        <property name="hibernate.query.factory_class" value="org.hibernate.hql.classic.ClassicQueryTranslatorFactory"/>
        <property name="hibernate.archive.autodetection" value="class"/>
        <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
        <property name="hibernate.current_session_context_class" value="jta"/>   
    </properties>   
</persistence-unit>

When it says "cannot resolve reference", where else can I define the beans? ejb-jar.xml isn't needed with EJB3. Is there some other config file that I'm missing?

UPDATE:

• I have updated the code segments above so that the bean is created as the interface type instead, as per the answer below.

• Do the EJBs need to be defined or mapped in web.xml?

• Assuming that a reference is required in web.xml, I have added an EJB ref to web.xml (see below), but now I'm receiving a new error (see below)

lines added to web.xml:

<ejb-ref>
    <ejb-ref-name>ejb/TestBeanEJBname</ejb-ref-name>
    <ejb-ref-type>Session</ejb-ref-type>
    <home>com.mydomain.action.TestBeanService</home>
    <remote>com.mydomain.action.TestBeanServiceInterface</remote>
 </ejb-ref>

new error message now being received:

12:11:00,980 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to PostClassLoader: name=vfs:///Users/willtardy/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.0_Runtime_Server1300532851414/deploy/purejetWeb.war state=ClassLoader mode=Manual requiredState=PostClassLoader: org.jboss.deployers.spi.DeploymentException: java.lang.IllegalStateException: Failed to find ContainerDependencyMetaData for interface: au.com.purejet.action.TestBeanServiceInterface

Caused by: java.lang.IllegalStateException: Failed to find ContainerDependencyMetaData for interface: com.mydomain.action.TestBeanServiceInterface
at org.jboss.deployment.MappedReferenceMetaDataResolverDeployer.resolveEjbInterface(MappedReferenceMetaDataResolverDeployer.java:1255) [:6.0.0.Final]
at org.jboss.deployment.MappedReferenceMetaDataResolverDeployer.resolveEjbRefs(MappedReferenceMetaDataResolverDeployer.java:1099) [:6.0.0.Final]
at org.jboss.deployment.MappedReferenceMetaDataResolverDeployer.resolve(MappedReferenceMetaDataResolverDeployer.java:807) [:6.0.0.Final]
at org.jboss.deployment.MappedReferenceMetaDataResolverDeployer.internalDeploy(MappedReferenceMetaDataResolverDeployer.java:181) [:6.0.0.Final]
... 39 more

Update:

"Local" interface works just fine (i.e. doesn't have to be Remote)

I got it to work by deploying within an Enterprise Application Project within Eclipse. No references to beans are required within web.xml, ejb-jar.xml, or application.xml.

Contents of application.xml within EAR being deployed to Jboss:

<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:application="http://java.sun.com/xml/ns/javaee/application_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd" id="Application_ID" version="6">
<display-name>myprojects</display-name>
<module>
<web>
<web-uri>myproject.war</web-uri>
<context-root>myproject</context-root>
</web>
</module>
<module>
<ejb>myprojectsEJB.jar</ejb>
</module>
</application>

SessionBean class:

@Stateless
@Local(SessionBeanLocal.class)

public class SessionBean implements SessionBeanLocal {

@PersistenceContext(unitName="JPAtestProjectPersistenceUnit")
private EntityManager em;

Interface class:

@Local
public interface SessionBeanLocal {

TestTiger addTestTiger(String testTigerName);

MOST IMPORTANT change that got things working: inside the class that holds the session been local variable, a setting was required for the container (JBoss AS) to create the bean:

@EJB()
private TestBean3Local beanVariable;

public void setBeanVariable(TestBean3Local beanVariable) {
    System.out.println("=====\n\nSET BEAN VARIABE SETTER WAS CALLED. (BY CONTAINER?)  \n\n=======");
    this.beanVariable = beanVariable;
}