Hello *, this document
http://docs.oracle.com/javaee/5/tutorial/doc/bnbrm.html states that "resource injection using annotations can only be used with classes that are managed by a Java EE compliant container [...] One exception is a request-scoped JavaServer Faces managed bean". Then it specifies that "You can still use resource injection in a web application that is not a JavaServer Faces application if you can do it in an object that is managed by the container. These objects include servlets and ServletContextListener objects" My application is a Wicket app, not JSF, but I'm deploying in Tomee+. As I understand it, my container should be J2EE compliant, right? However, in: @Stateless public class MyPage extends org.apache.wicket.markup.html.WebPage { @PersistenceUnit private EntityManagerFactory emf; ... emf is always null. Here is my persistence.xml <?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" 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_1_0.xsd"> <persistence-unit name="mercatino-unit"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <jta-data-source>mercatinoDatabase</jta-data-source> <non-jta-data-source>mercatinoDatabaseUnmanaged</non-jta-data-source> <properties> <property name="hibernate.hbm2ddl.auto" value="create-drop"/> <property name="hibernate.archive.autodetection" value="class, hbm" /> <property name="hibernate.show_sql" value="true" /> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mydb?zeroDateTimeBehavior=convertToNull&autoReconnect=true</property> <property name="hibernate.connection.username">myuser</property> <property name="hibernate.connection.password">secret</property> <property name="hibernate.c3p0.min_size" value="5" /> <property name="hibernate.c3p0.max_size" value="20" /> <property name="hibernate.c3p0.timeout" value="300" /> <property name="hibernate.c3p0.max_statements" value="50" /> <property name="hibernate.c3p0.idle_test_period" value="3000" /> </properties> </persistence-unit> </persistence> What am I doing wrong?