I cannot create a EntityManagerFactory with tomcat

Question

Hello everyone.
I hope you could help me with some problem I'm having using persistence (with hibernate annotations) in my web applicacion.
I have a method that receives some pojos to persist. The problem is that I cannot find a way to generate de entitymanagerFactory. whenever I try to do it, the method just finishes without giving any exception. This confuses me.
My persistence.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_1_0.xsd" version="1.0">
     <persistence-unit name="FlatFilePU" transaction-type="RESOURCE_LOCAL">
          <provider>org.hibernate.ejb.HibernatePersistence</provider>
          <non-jta-data-source>java:comp/env/l2bdomi</non-jta-data-source>
            <properties>
               <property name = "hibernate.connection.driver_class" value = "oracle.jdbc.driver.OracleDriver"/>
               <property name = "hibernate.connection.url" value = "jdbc:oracle:thin:@xx.xx.xx.xx:1521:xxxx"/>
               <property name = "hibernate.connection.username" value = "xxxx"/>
               <property name = "hibernate.connection.password" value = "xxxx"/>
               <property name="hibernate.hbm2ddl.auto" value="update"/>
               <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9Dialect"/>
            </properties> 
     </persistence-unit>
</persistence>and the method that is failing:
public void guardaLote(LoteDomiciliacion lote){
          try{
          System.out.println("1");
                              //The following line is the last one that gets executed.
          EntityManagerFactory emf = Persistence.createEntityManagerFactory("FlatFilePU"); 
          EntityManager ent= emf.createEntityManager();
          System.out.println("2");
          ent.getTransaction().begin();
          System.out.println("3");
          loteDao.save(lote);
          System.out.println("4");
          ArrayList<LineaDomiciliacion> lineas=(ArrayList<LineaDomiciliacion>) lote.getLineas();
          Iterator<LineaDomiciliacion> i = lineas.iterator();
          while(i.hasNext()){
               registroDao.save(i.next());
          System.out.println("5");
          ent.getTransaction().commit();
          ent.close();
          }catch(Exception e){
               System.out.println("erro2");
               e.printStackTrace();
     }extract from tomcat's server.xml:
<GlobalNamingResources>
    <!-- Test entry for demonstration purposes -->
    <Environment name="simpleValue" type="java.lang.Integer" value="30"/>
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
       description="User database that can be updated and saved"
           factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
          pathname="conf/tomcat-users.xml" />
          <Resource name="masterPool" auth="Container" type="java.util.ArrayList" factory="uk.org.primrose.pool.datasource.MasterPoolDataSourceFactory" configFile="C:/Tomcat 5.5/conf/poolConfig.properties" description="Holds all the pools" />       
         <Resource name="l2bdomi"  auth="Container" type="uk.org.primrose.pool.datasource.PoolDataSource" description="The l2bdomi database pool" factory="uk.org.primrose.pool.datasource.PoolDataSourceFactory" poolName="l2bdomi" />
  </GlobalNamingResources>after EntityManagerFactory emf = Persistence.createEntityManagerFactory("FlatFilePU"); this method an the method that called it (in a servlet) finishes. The only thing that gets executed after that is a finally. I tried to catch Exception but I didnt get any.
My guess is that the problem comes from the datasource configuration but Im not sure since I am new working with datasources.
thank you for any help you can provide me.
Edited by: santiagozky on Apr 13, 2009 2:48 PM

Answer 1

Ok, I got some errors using a Junit test. I don´t know if these are valid since Im not under tomcat when using Junit.
Anyway, here they are:
java.lang.ExceptionInInitializerError
     at com.mit.persistencia.GuardaLote.guardaLote(GuardaLote.java:40)
     at com.mit.persistencia.GuardaLoteTest.testSave(GuardaLoteTest.java:87)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
     at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
     at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
     at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
     at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
     at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:66)
     at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
     at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
     at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
     at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:45)
     at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: javax.persistence.PersistenceException: org.hibernate.HibernateException: Could not find datasource
     at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:737)
     at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
     at com.mit.persistencia.EntityManagerHelper.<clinit>(EntityManagerHelper.java:20)
     ... 22 more
Caused by: org.hibernate.HibernateException: Could not find datasource
     at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:56)
     at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)
     at org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29)
     at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)
     at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
     at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
     at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
     at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:730)
     ... 26 more
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
     at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
     at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
     at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
     at javax.naming.InitialContext.lookup(Unknown Source)
     at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52)
     ... 33 more