5 Replies Latest reply on Sep 11, 2008 9:36 AM by mean.meanmachine.gmx.at

EntityManager-Error:

mean.meanmachine.gmx.at Sep 10, 2008 2:26 PM

Hello,

I'am using JBoss/Seam with three DAO-classes. When I login, my AuthenticationBean calls a method in my application tier (findUserByLogin()) which calls a method in my DAO-class (findUserByLogin()).

All works fine, if I only call my application tier or if I send the database request out of AuthenticationBean or the class from the application tier.

But if I want to send the request out of the dao, it doesn't work because of my EntityManager (or the instatiation of it). Even if I have this as a method

@Stateless
@Local(BenutzerverwaltungDao.class)
final public class BenutzerverwaltungDaoBean implements BenutzerverwaltungDao {
        @Logger
        Log log;        
        
        @PersistenceContext(name = PERSISTENCE_CONTEXT)
        private EntityManager em;

public User findUserByLogin(...) {
 log.debug(em);
 return User user = new User();
}

If I comment the row log.debug(em) or whatever uses em, it works.

This is my Stack Trace:

14:18:38,242 ERROR SeamLoginModule Error invoking login method
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:342)
        at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
        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:174)
        at org.jboss.seam.security.jaas.SeamLoginModule.login(SeamLoginModule.java:109)
        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:597)
        at javax.security.auth.login.LoginContext.invoke(LoginContext.java:769)
        at javax.security.auth.login.LoginContext.access$000(LoginContext.java:186)
        at javax.security.auth.login.LoginContext$5.run(LoginContext.java:706)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.login.LoginContext.invokeCreatorPriv(LoginContext.java:703)
        at javax.security.auth.login.LoginContext.login(LoginContext.java:575)
        at org.jboss.seam.security.Identity.authenticate(Identity.java:317)
        at org.jboss.seam.security.Identity.authenticate(Identity.java:306)
        at org.jboss.seam.security.Identity.login(Identity.java:235)
        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:597)
        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
        at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
        at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
        at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
        at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
        at javax.faces.component.UICommand.broadcast(UICommand.java:387)
        at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
        at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)
        at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        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.web.IdentityFilter.doFilter(IdentityFilter.java:38)
        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:150)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:379)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:506)
        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
        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.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:73)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:856)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:566)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
        at java.lang.Thread.run(Thread.java:619)
Caused by: javax.ejb.EJBTransactionRolledbackException
        at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:87)
        at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
        at org.jboss.aspects.tx.TxInterceptor$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 $Proxy247.authenticate(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:597)
        at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
        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$$javassist18.authenticate(Object$$javassist18.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:597)
        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
        ... 81 more
Caused by: java.lang.NullPointerException
        at de.autohaus.benutzerverwaltung.db.BenutzerverwaltungDaoBean.findKundeByLogin(BenutzerverwaltungDaoBean.java:148)
        at de.autohaus.benutzerverwaltung.BenutzerverwaltungBean.findKundeNachLogin(BenutzerverwaltungBean.java:378)
        at de.autohaus.AuthenticatorBean.authenticate(AuthenticatorBean.java:64)
        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:597)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
        at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
        at org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:44)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
        at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:39)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke(EntityManagerProxyInterceptor.java:29)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInvoke(HibernateSessionProxyInterceptor.java:31)
        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:597)
        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)
        ... 114 more

May anyone please help me, how to assign the EntityManager in this class?

In other classes it works exactly the way I do it in this one.

Thanks and best wishes,

Dirk

1. Re: EntityManager-Error:

thejavafreak Sep 10, 2008 4:27 PM (in response to mean.meanmachine.gmx.at)

How does your components.xml and persistence.xml look like?
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2. Re: EntityManager-Error:

mean.meanmachine.gmx.at Sep 11, 2008 12:26 AM (in response to mean.meanmachine.gmx.at)

Hi Joshua,

thanks for your answer! This is my 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:drools="http://jboss.com/products/seam/drools"
            xmlns:bpm="http://jboss.com/products/seam/bpm"
            xmlns:security="http://jboss.com/products/seam/security"
            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-2.1.xsd 
                 http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.1.xsd 
                 http://jboss.com/products/seam/drools http://jboss.com/products/seam/drools-2.1.xsd
                 http://jboss.com/products/seam/bpm http://jboss.com/products/seam/bpm-2.1.xsd
                 http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.1.xsd
                 http://jboss.com/products/seam/mail http://jboss.com/products/seam/mail-2.1.xsd
                 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.1.xsd">

   <core:init debug="@debug@" jndi-pattern="@jndiPattern@"/>
   <!--core:init debug="true" jndi-pattern="autohaus.ear/#{ejbName}/local"/-->
   
     
   <core:manager concurrent-request-timeout="500" 
                 conversation-timeout="120000" 
                 conversation-id-parameter="cid"
                 parent-conversation-id-parameter="pid"/>
    
   <persistence:managed-persistence-context name="entityManager"
                                     auto-create="true"
                      persistence-unit-jndi-name="java:/autohausEntityManagerFactory"/>                          

   <drools:rule-base name="securityRules">
      <drools:rule-files>
         <value>/security.drl</value>
      </drools:rule-files>
   </drools:rule-base>

   <security:rule-based-permission-resolver security-rules="#{securityRules}"/> 
   
   <security:identity authenticate-method="#{authenticator.authenticate}"/>
   <!--security:identity authenticate-method="#{authenticator.authenticate}" remember-me="true"/-->
   
   <event type="org.jboss.seam.security.notLoggedIn">
      <action execute="#{redirect.captureCurrentView}"/>
   </event>
   <event type="org.jboss.seam.security.loginSuccessful">
      <action execute="#{redirect.returnToCapturedView}"/>
   </event>
   
   <mail:mail-session host="localhost" port="2525" username="test" password="test" />
        
   <!-- For use with jBPM pageflow or process management -->
   <!--  
   <bpm:jbpm>
      <bpm:process-definitions></bpm:process-definitions>
      <bpm:pageflow-definitions></bpm:pageflow-definitions>
   </bpm:jbpm>
   -->
      
</components>

This is my persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Persistence deployment descriptor for dev profile -->
<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="autohaus">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/autohausDatasource</jta-data-source>
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
         <property name="hibernate.hbm2ddl.auto" value="none"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/autohausEntityManagerFactory"/>
         <property name="hibernate.default_schema" value="public"/>
      </properties>
   </persistence-unit>
    
</persistence>

Thanks a lot and best regards,

Dirk

3. Re: EntityManager-Error:

thejavafreak Sep 11, 2008 2:36 AM (in response to mean.meanmachine.gmx.at)
Hi Dirk,

Try changing the declaration of entity manager into this:

@PersistenceContext(name = PERSISTENCE_CONTEXT) private EntityManager entityManager;

Hopefully it works.
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4. Re: EntityManager-Error:

vladimir.kovalyuk Sep 11, 2008 7:06 AM (in response to mean.meanmachine.gmx.at)

Dirk, the stack trace tell you that you have NPE in your findKundleByLogin method. It difficult to guess how the line caused the exception might look like.
How PERSISTENCE_CONTEXT is defined?
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5. Re: EntityManager-Error:

mean.meanmachine.gmx.at Sep 11, 2008 9:36 AM (in response to mean.meanmachine.gmx.at)
Morning Joshua and Vladimir,

thanks for your fast response!

@Joshua: I tried your way, but it didn't work :(

@Vladimir: I don't know, if PERSISTENCECONTEXT is the reason for this error. If I just write @PersistenceContext EntityManager am;
I get the same error.

And in my AuthenticatorBean-Class I just use EntityManager as seen above.

Here is the content of this file:

package de.autohaus.util; public interface EjbConstants { //------------------------------------------------------------- // JPA String PERSISTENCE_CONTEXT = "autohaus"; Long KEINE_ID = null; int ERSTE_VERSION = 0; //------------------------------------------------------------- // Kunde String KUNDE_NACHNAME_PATTERN = "[A-ZÄÖÜ][a-zäöüß]+(-[A-ZÄÖÜ][a-zäöüß]+)?"; //------------------------------------------------------------- // Passwort-Verschluesselung String HASH_ALGORITHM = "SHA-1"; // "MD5", "SHA-128", "SHA-256", "SHA-512" String HASH_ENCODING = "base64"; String HASH_CHARSET = "UTF-8"; }

What I'm thinking about is: Is it possible, that I have no settings/permissions to use EntityManager in this package?

My AuthenticatorBean.java is in src/ACTION/de/autohaus/AuthenticatorBean.java
My BenutzerverwaltungDaoBean.java is in src/MODEL/de/autohaus/BenutzerverwaltungDaoBean.java

I dont's know, if this matters... Perhaps I have to tell any xml file to allow files from .../MODEL/... to use EntityManager,..

Because the NPE is caused by em, that's null in my mind?!?!

Btw: the class of BenutzerverwaltungDaoBean.java I've posted is the complete class, because I commented every other method for testing.

Hopefully you have still other ideas what to try.

Thank you very much and best regards,

Dirk
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