EntityManager.createQuery() löst NullPointerException aus

bekomme NullPointerException jedes Mal, wenn EntityManager.createQuery() oder EntityManager.createNamedQuery() aufgerufen wird.EntityManager.createQuery() löst NullPointerException aus

Ich benutze Glassfish 4.0, Hibernate 4.3.5 und EJB.

Ich habe folgende Hierarchie:

DaoTemplate wo ich PersistenceContext und generische Methoden haben

@Singleton 
public class DaoTemplate<T extends IdEntityInterface> { 
    @PersistenceContext(unitName = "pu_name") 
    protected EntityManager em; 
    .... 
}

Abstrakte Klasse mit Konstruktor beacuse Bean kann nicht eine andere Bohne erweitern.

public abstract class AbstractDaoTemplate<T extends IdEntityInterface> extends DaoTemplate<T> { 

    public AbstractDaoTemplate(Class<T> entityClass) { 
     super(entityClass); 
    } 

}

Und dann habe ich Dao.

@Singleton 
public class SomeDao extends AbstractDaoTemplate<SomeEntity> { 

    public SomeDao() { 
     super(SomeEntity.class) 
    }   

    @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) 
    public List<SomeEntity> someDaoMethod() { 
     ... 
     em.createQuery("SomeQuery"); 
     ... 
    } 
}

Wenn someDaoMethod Nullpointer aufgerufen wird, wird mit em.createQuery("SomeQuery") auf Linie geworfen, aber em ist nicht null.

Ich habe auch versucht em.createQuery("SomeQuery") von Debuggerfenster zu nennen, hier ist die Ausgabe:

Exception occurred in target VM: 
java.lang.NullPointerException: 
    at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.getStatus(JtaStatusHelper.java:76) 
    at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.isActive(JtaStatusHelper.java:118) 
    at org.hibernate.engine.transaction.internal.jta.CMTTransaction.join(CMTTransaction.java:149) 
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1602) 
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:210) 
    at org.hibernate.jpa.internal.EntityManagerImpl.<init>(EntityManagerImpl.java:91) 
    at org.hibernate.jpa.internal.EntityManagerFactoryImpl.internalCreateEntityManager(EntityManagerFactoryImpl.java:345) 
    at org.hibernate.jpa.internal.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:338) 
    at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:197) 
    at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createQuery(EntityManagerWrapper.java:455) 
    at eu.comcom.kweportal.dao.ShipmentDao.getActiveOldShipments(ShipmentDao.java:196) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153) 
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695) 
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(Abstrac tEJBRequestScopeActivationInterceptor.java:46) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140) 
    at sun.reflect.GeneratedMethodAccessor77.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369) 
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667) 
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLoca lObjectInvocationHandlerDelegate.java:88) 
    at com.sun.proxy.$Proxy542.getActiveOldShipments(Unknown Source) 
    at eu.comcom.kweportal.dao.__EJB31_Generated__ShipmentDao__Intf____Bean__.getActiveOldShipments(Unknown Source) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:396) 
    at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:108) 
    at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56) 
    at org.jboss.weld.bean.proxy.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:63) 
    at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:101) 
    at eu.comcom.kweportal.dao.ShipmentDao$Proxy$_$$_Weld$EnterpriseProxy$.getActiveOldShipments(Unknown Source) 
    at eu.comcom.kweportal.schedule.ActualTimeScheduler.updatePastMilestonesTimes(ActualTimeScheduler.java:41) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153) 
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695) 
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke (AbstractEJBRequestScopeActivationInterceptor.java:55) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundTimeout(SystemInterceptorProxy.java:145) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369) 
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667) 
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655) 
    at com.sun.ejb.containers.BaseContainer.callEJBTimeout(BaseContainer.java:3993) 
    at com.sun.ejb.containers.EJBTimerService.deliverTimeout(EJBTimerService.java:1199) 
    at com.sun.ejb.containers.EJBTimerService.access$000(EJBTimerService.java:89) 
    at com.sun.ejb.containers.EJBTimerService$TaskExpiredWork.run(EJBTimerService.java:1919) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:744)

und persistence.xml:

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0" 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_2_0.xsd"> 
    <persistence-unit name="pu_name" transaction-type="JTA"> 
     <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> 
     <jta-data-source>jdbc/kweportal</jta-data-source> 
     <exclude-unlisted-classes>false</exclude-unlisted-classes> 
     <properties> 
      <property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml"/> 
     </properties> 
    </persistence-unit> 
</persistence>

Irgendwelche Ideen, was könnte falsch sein?

Quelle

2014-07-03 tvazac

Ich habe es selbst herausgefunden.

persistence.xml Muss sieht wie folgt aus:

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.1" xmlns="http://xmlns.jcp.org/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_2_1.xsd"> 
    <persistence-unit name="pu_name" transaction-type="JTA"> 
     <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> 
     <jta-data-source>jdbc/kweportal</jta-data-source> 
     <exclude-unlisted-classes>false</exclude-unlisted-classes> 
     <properties> 
      <property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml"/> 
      <property name="hibernate.transaction.jta.platform"  value="org.hibernate.service.jta.platform.internal.SunOneJtaPlatform" /> 
     </properties> 
</persistence-unit> 
</persistence>

Quelle

2014-07-03 16:17:55 tvazac

Großen. Vielen Dank. Jetzt habe ich eine klare Ausnahme: 'org.hibernate.service.jndi.JndiException: Kann JNDI-Name [java: appserver/TransactionManager] nicht' ' – vault

suchen und die Lösung ist ... JBoss spezifische JTA-Plattform. '' – vault

Hinzufügen der Lösung für ** WebLogic **, um sie an einem Ort zu haben : '' – AndrewMcCoist

EntityManager.createQuery() löst NullPointerException aus

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