[jboss-dev-forums] [JBoss AS7 Development] - javax.persistence.TransactionRequiredException

Marcus Schmidke [http://community.jboss.org/people/MSchmidke] created the discussion "javax.persistence.TransactionRequiredException" To view the discussion, visit: http://community.jboss.org/message/631054#631054 -------------------------------------------------------------- Hello all, after years of developing with Seam 2.x, I now try to jump start into a new world (AS7, builtin CDI etc.), but until now, I am not very succesful. I've written a very simple sample application, a few entities and one servlet. After lots of work, everything deploys fine, Hibernate generates tables, well. Then I call the servlet from Webbrowser. The servlet does nothing else than injecting and calling a SLSB, which itself tries to create and persist an entity. With Seam 2.x, I never worried about transactions - everything was fully automatic. In fact, I have absolutely no knowledge about EJB3 CMT, because Seam did everything for me. But now the only thing I get this this weird TransactionRequiredException. Google does not know anything about it (sureley because it is an absolute beginner's error). My servlet: @WebServlet(urlPatterns = "/*") public class VaadinAppServlet extends HttpServlet {     @Inject     Beispieldaten bd;     @Override     protected void service(HttpServletRequest arg0, HttpServletResponse arg1)             throws ServletException, IOException {         bd.run();         super.service(arg0, arg1);     } } The SLSB: @Stateless @TransactionManagement(TransactionManagementType.CONTAINER) @TransactionAttribute(TransactionAttributeType.REQUIRED) public class BeispieldatenImpl implements Beispieldaten {     @PersistenceContext     private EntityManager session;     public void run() {        TestEntity te=new TestEntity();        session.persist(te);     } } (as you can see, I added lots of useless annotations just to avoid any possible mistake) And the interface: @Local public interface Beispieldaten {     void run(); } persistence.xml: <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0"     xmlns=" http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence" xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation=" http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">     <persistence-unit name="KochbuchServer"         transaction-type="JTA">         <jta-data-source>java:jboss/datasources/KochbuchDS</jta-data-source>         <exclude-unlisted-classes>false</exclude-unlisted-classes>         <properties>             <property name="hibernate.show_sql" value="true" />             <property name="hibernate.default_batch_fetch_size" value="100" />             <property name="hibernate.hbm2ddl.auto" value="create" />             <property name="jboss.entity.manager.factory.jndi.name"                 value="java:/EntityManagerFactories/KochbuchServer" />         </properties>     </persistence-unit> </persistence> All packaged in an EAR - servlet in WAR, other classes in EJB-module. I'm sure my mistake is quite obvious, but I need help ... Thank you! Marcus. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/631054#631054] Start a new discussion in JBoss AS7 Development at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]