4 Replies Latest reply on Feb 12, 2008 2:25 AM by Daniel Wachter

    Problems loading EntityManager in

    Daniel Wachter Newbie

      Hello together!

      I'm trying to get the "Store your message in a database" example from the blog of Pete Muir working...

      I noticed, that I have some problems with the EntityManger,
      the EntityManager is always null!

      Some hints?
      Thanks Daniel


      File: persistence.xml

      <persistence>
       <persistence-unit name="maxcontrol">
       <provider>org.hibernate.ejb.HibernatePersistence</provider>
       <jta-data-source>java:/maxcontrolDatasource</jta-data-source>
       <properties>
       <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
       <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
       <property name="hibernate.transaction.flush_before_completion" value="true"/>
       <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
       <property name="hibernate.show_sql" value="true"/>
       <property name="jboss.entity.manager.factory.jndi.name"
       value="java:/maxcontrolEntityManagerFactory" />
      
       </properties>
       </persistence-unit>
      </persistence>
      



      File: components.xml
      <?xml version="1.0" encoding="UTF-8"?>
      <components xmlns="http://jboss.com/products/seam/components"
       xmlns:core="http://jboss.com/products/seam/core"
       xmlns:persistence="http://jboss.com/products/seam/persistence"
       xmlns:security="http://jboss.com/products/seam/security"
       xmlns:async="http://jboss.com/products/seam/async"
       xmlns:mail="http://jboss.com/products/seam/mail"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation=
       "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.0.xsd
       http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.0.xsd
       http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.0.xsd
       http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.0.xsd
       http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.0.xsd">
      
      
       <core:init jndi-pattern="maxcontrol/#{ejbName}/local" debug="true"/>
      
       <core:manager conversation-timeout="120000"/>
      
       <persistence:managed-persistence-context name="entityManager"
       auto-create="true"
       persistence-unit-jndi-name="java:/maxcontrolEntityManagerFactory" />
      
       <!-- Loading Security-Settings -->
       <security:identity authenticate-method="#{authenticator.authenticate}" />
      
       <!-- Loading Mail-Settings -->
       <mail:mail-session host="localhost"
       port="25"
       debug="true"
       username=""
       password=""/>
      
       <!-- Loading Quartz-Settings -->
       <!-- <async:quartz-dispatcher /> -->
      
      
      </components>
      



      File: DatabaseResourceLoader.java
      import java.util.Collections;
      import java.util.Enumeration;
      import java.util.List;
      import java.util.Locale;
      import java.util.ResourceBundle;
      import javax.persistence.EntityManager;
      import javax.persistence.NoResultException;
      import org.jboss.seam.Component;
      import org.jboss.seam.annotations.Name;
      import org.jboss.seam.annotations.intercept.BypassInterceptors;
      import org.jboss.seam.core.ResourceLoader;
      
      
      /**
       * @author dwachter
       * @version 1.0
       * @created 07-Feb-2008 17:29:18
       */
      @BypassInterceptors
      @Name("org.jboss.seam.core.resourceLoader")
      public class DatabaseResourceLoader extends ResourceLoader {
      
       // Redefine how we load a resource bundle
       public ResourceBundle loadBundle(final String bundleName) {
       return new ResourceBundle() {
      
       public Enumeration<String> getKeys() {
       Locale locale = org.jboss.seam.core.Locale.instance();
       EntityManager entityManager = (EntityManager) Component.getInstance("myEntityManager");
       List resources = entityManager.createNamedQuery("keys")
       .setParameter("bundleName", bundleName)
       .setParameter("language", locale.getLanguage())
       .setParameter("country", locale.getCountry())
       .setParameter("variant", locale.getVariant())
       .getResultList();
       return Collections.enumeration(resources);
       }
      
       protected Object handleGetObject(String key) {
       Locale locale = org.jboss.seam.core.Locale.instance();
       EntityManager entityManager = (EntityManager) Component.getInstance("myEntityManager");
      
       // Check state of Entitymanager
       if(entityManager == null) {
       System.out.println("EM IS NULL!");
       }
       else {
       System.out.println("EM IS NOT NULL!");
       }
      
       try {
       return entityManager.createNamedQuery("value")
       .setParameter("bundleName", bundleName)
       .setParameter("language", locale.getLanguage())
       .setParameter("country", locale.getCountry())
       .setParameter("variant", locale.getVariant())
       .setParameter("key", key)
       .getSingleResult();
       } catch (NoResultException e) {
       return null;
       }
       }
      
       };
       }
      }
      


      Console output:
      16:52:39,818 INFO [STDOUT] EM IS NULL!
      16:52:39,839 ERROR [SeamPhaseListener] uncaught exception
      javax.el.ELException: javax.ejb.EJBTransactionRolledbackException
       at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:333)
       at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:274)
       at org.jboss.el.parser.AstMethodSuffix.getValue(AstMethodSuffix.java:59)
       at org.jboss.el.parser.AstMethodSuffix.invoke(AstMethodSuffix.java:65)
       at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
       at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
       at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:173)
       at org.jboss.seam.navigation.Pages.callAction(Pages.java:636)
       at org.jboss.seam.navigation.Pages.preRender(Pages.java:289)
       at org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:549)
       at org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:460)
       at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:144)
       at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:114)
       at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
       at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
       at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:307)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
       at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
       at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
       at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
       at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
       at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
       at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
       at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
       at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
       at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
       at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
       at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:856)
       at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:566)
       at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
       at java.lang.Thread.run(Thread.java:595)
      Caused by: javax.ejb.EJBTransactionRolledbackException
       at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:87)
       at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
       at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:95)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
       at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:240)
       at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:210)
       at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:84)
       at $Proxy661.testLocale(Unknown Source)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
       at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
       at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
       at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
       at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
       at org.javassist.tmp.java.lang.Object_$$_javassist_1.testLocale(Object_$$_javassist_1.java)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
       ... 55 more
      Caused by: java.lang.NullPointerException
       at com.solarmax.maxcontrol.action.auth.DatabaseResourceLoader$1.handleGetObject(DatabaseResourceLoader.java:54)
       at java.util.ResourceBundle.getObject(ResourceBundle.java:319)
       at org.jboss.seam.core.SeamResourceBundle.handleGetObject(SeamResourceBundle.java:108)
       at java.util.ResourceBundle.getObject(ResourceBundle.java:319)
       at java.util.ResourceBundle.getString(ResourceBundle.java:285)
       at org.jboss.seam.international.Messages$1.get(Messages.java:60)
       at org.jboss.seam.international.Messages$1.get(Messages.java:102)
       at javax.el.MapELResolver.getValue(MapELResolver.java:51)
       at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
       at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
       at org.jboss.el.parser.AstBracketSuffix.getValue(AstBracketSuffix.java:59)
       at org.jboss.el.parser.AstValue.getValue(AstValue.java:67)
       at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
       at org.jboss.seam.core.Expressions$1.getValue(Expressions.java:111)
       at org.jboss.seam.Component.getValueToInject(Component.java:2125)
       at org.jboss.seam.Component.injectAttributes(Component.java:1598)
       at org.jboss.seam.Component.inject(Component.java:1416)
       at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:45)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
       at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
       at org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke(EntityManagerProxyInterceptor.java:26)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
       at org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInvoke(HibernateSessionProxyInterceptor.java:27)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
       at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
       at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:50)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
       at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
       ... 88 more