3 Replies Latest reply on Oct 23, 2007 2:56 AM by Zyborg Private

    Problem with Entity Manager dependency injection in JBoss 5

    Olesya Bolobova Newbie

      Hi, everybody!

      I'm trying to perform EM dependency injection in servlet using JBoss 5 Beta 1 and get the following deployment exception:

      ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController]
      Error installing to Start: name=jboss.web.deployment:war=/simple-web state=Create mode=Manual requiredState=Installed
      
      java.lang.RuntimeException: @PersistenceContext(name='env/Test/em',unitName='test-jpa') on EJB:
      simple-web.war failed to inject on field javax.persistence.EntityManager Test.em
      
      Unable to find persistence unit: test-jpa for deployment: simple-web.war
       at org.jboss.injection.PcEncInjector.inject(PcEncInjector.java:75)
       at org.jboss.web.tomcat.tc6.TomcatInjectionContainer.populateEnc(TomcatInjectionContainer.java:206)
      ...


      NOTE: When there were some errors in persistence.xml (now fixed), server reported them explicitly. Though, how can it be that server is "Unable to find persistence unit: test-jpa", but is able to find errors in it?

      And a warning:

      WARN [org.hibernate.ejb.Ejb3Configuration] Persistence provider caller does not implements the EJB3 spec correctly. PersistenceUnitInfo.getNewTempClassLoader() is null.


      When invoking servlet I get the following response:

      exception
      
      javax.servlet.ServletException: Error instantiating servlet class Test
       org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:86)
       org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
       org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:212)
      ...
      
      root cause
      
      java.lang.RuntimeException: Unable to inject jndi dependency: env/Test/em into field interface javax.persistence.EntityManager
       org.jboss.injection.JndiFieldInjector.lookup(JndiFieldInjector.java:85)
       org.jboss.injection.JndiFieldInjector.inject(JndiFieldInjector.java:99)
      ...
      
      root cause
      
      javax.naming.NameNotFoundException: Test not bound
       org.jnp.server.NamingServer.getBinding(NamingServer.java:529)
       org.jnp.server.NamingServer.getBinding(NamingServer.java:537)
       org.jnp.server.NamingServer.getObject(NamingServer.java:543)
       org.jnp.server.NamingServer.lookup(NamingServer.java:267)
       org.jnp.server.NamingServer.lookup(NamingServer.java:270)


      Here is my servlet code:

      public class Test ... {
      
      @PersistenceContext(unitName="test-jpa")
      EntityManager em;
      
      protected void doGet(...) {
      
       Mytable mytable = em.find(Mytable.class, new Integer(5));
       response.getOutputStream().print(mytable.getName());
       }
      }


      Here is persistence.xml:

      <?xml version="1.0" encoding="UTF-8"?>
      
      <persistence version="1.0" ... >
       <persistence-unit name="test-jpa" transaction-type="RESOURCE_LOCAL">
       <jta-data-source>java:/MySqlDS</jta-data-source>
       <class>Mytable</class>
       <properties>
       <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLInnoDBDialect" />
       </properties>
       </persistence-unit>
      </persistence>


      WAR structure:

      simple-web.war
       /META-INF
       manifest.mf
       /WEB-INF
       /classes
       Test.java (servlet)
       Mytable.java (entity)
       web.xml
       persistence.xml


      AFAIK, JBoss 5 is supposed to support dependency injection in servlets. So what's wrong?

      Any help would be pleased. Thanks in advance.