java ee - EntityManager not injected into MDB (although other resources are) -

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in following code, queues injected correctly, entity manager not. not experienced javaee , @ loss why doesn't work. hints appreciated!

i use openejb application container. using code below, queue , connectionfactory injected correctly; however, entitymanager null. far know, 1 can use @persistencecontext in managed entity (i.e., bean) it. or need define in ejb-jar.xml file?

here code looks like:

the mdb:

 public class serverbean implements messagelistener {   @resource  private connectionfactory factory;   @resource(name = "queue")  private queue queue;   @persistencecontext  private entitymanager em;    //methods...  }

ejb-jar.xml:

<ejb-jar xmlns="http://java.sun.com/xml/ns/javaee" metadata-complete="true"> <enterprise-beans>     <message-driven>         <ejb-name>serverbean</ejb-name>         <ejb-class>foo.serverbean</ejb-class>          <messaging-type>javax.jms.messagelistener</messaging-type>          <activation-config>             <activation-config-property>                 <activation-config-property-name>destination</activation-config-property-name>                 <activation-config-property-value>serverbean</activation-config-property-value>             </activation-config-property>             <activation-config-property>                 <activation-config-property-name>destinationtype</activation-config-property-name>                 <activation-config-property-value>javax.jms.queue</activation-config-property-value>             </activation-config-property>         </activation-config>          <resource-ref>             <res-ref-name>java:comp/env/foo.serverbean/factory</res-ref-name>             <res-type>javax.jms.connectionfactory</res-type>             <injection-target>                 <injection-target-class>foo.serverbean</injection-target-class>                 <injection-target-name>factory</injection-target-name>             </injection-target>         </resource-ref>          <resource-env-ref>             <resource-env-ref-name>java:comp/env/queue</resource-env-ref-name>             <resource-env-ref-type>javax.jms.queue</resource-env-ref-type>             <mapped-name>queue</mapped-name>             <injection-target>                 <injection-target-class>foo.serverbean</injection-target-class>                 <injection-target-name>queue</injection-target-name>             </injection-target>         </resource-env-ref>      </message-driven>  </enterprise-beans> </ejb-jar>

persitence.xml:

<?xml version="1.0" encoding="utf-8"?> <persistence version="2.0"          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">  <persistence-unit name="foounit" transaction-type="jta">     <provider>org.hibernate.ejb.hibernatepersistence</provider>     <jta-data-source>foo_ds</jta-data-source>     <class>foo.model.bar</class>     <exclude-unlisted-classes>false</exclude-unlisted-classes>      <properties>     <property name="hibernate.connection.driver_class" value="org.h2.driver" />         <property name="hibernate.connection.url" value="jdbc:h2:/tmp/database/dst;auto_server=true;mvcc=true" />         <property name="hibernate.dialect" value="org.hibernate.dialect.h2dialect" />         <property name="hibernate.hbm2ddl.auto" value="create-drop" />     <property name="javax.persistence.validation.mode" value="none"/>     <property name="hibernate.query.factory_class" value="org.hibernate.hql.classic.classicquerytranslatorfactory" />     </properties> </persistence-unit> </persistence>


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