java.lang.IllegalStateException：無法檢索unitName的EntityManagerFactory CrudPU

我需要爲新任務執行測試任務，但似乎我陷入了困境。我有一些持久性上下文的問題。我使用Glassfish 3和本教程：http://uaihebert.com/?p=834 java.lang.IllegalStateException：無法檢索unitName的EntityManagerFactory CrudPU

已在服務器上配置jdbc/CrudDS，並且ping成功。當部署應用程序時，我在「引擎」列中看到只有ejb，web但沒有JPA引擎。

這裏是實體bean：

@Entity 
@Table(name = "tasks") 
public class Task implements Serializable { 

@Id 
    @GeneratedValue(strategy=GenerationType.AUTO) 
    private int id; 

@Column(name="title") 
private String title; 

@Column(name="mail") 
private String mail; 

@Column(name="text") 
private String text; 

@Column(name="time") 
private Date time; 

@Column(name="interval") 
private int interval; 

@Column(name="repeats") 
private int repeats; 

public int getId() { 
    return id; 
} 

public void setId(int id) { 
    this.id = id; 
} 

public String getTitle() { 
    return title; 
} 

public void setTitle(String title) { 
    this.title = title; 
} 

public String getMail() { 
    return mail; 
} 

public void setMail(String mail) { 
    this.mail = mail; 
} 

public String getText() { 
    return text; 
} 

public void setText(String text) { 
    this.text = text; 
} 

public Date getTime() { 
    return time; 
} 

public void setTime(Date time) { 
    this.time = time; 
} 

public int getInterval() { 
    return interval; 
} 

public void setInterval(int interval) { 
    this.interval = interval; 
} 

public int getRepeats() { 
    return repeats; 
} 

public void setRepeats(int repeats) { 
    this.repeats = repeats; 
} 

@Override 
public int hashCode() { 
    return getId(); 
} 


}

這裏是我的DAO抽象類：

public abstract class GenericDAO<T> { 

private final static String UNIT_NAME = "CrudPU"; 

@PersistenceContext(unitName = UNIT_NAME) 
private EntityManager em; 

private Class<T> entityClass; 

public GenericDAO(Class<T> entityClass) { 
    this.entityClass = entityClass; 
} 

public void save(T entity) { 
    em.persist(entity); 
} 

protected void delete(Object id, Class<T> classe) { 
    T entityToBeRemoved = em.getReference(classe, id); 

    em.remove(entityToBeRemoved); 
} 

public T update(T entity) { 
    return em.merge(entity); 
} 

public T find(int entityID) { 
    return em.find(entityClass, entityID); 
} 

@SuppressWarnings({ "unchecked", "rawtypes" }) 
public List<T> findAll() { 
    CriteriaQuery cq = em.getCriteriaBuilder().createQuery(); 
    cq.select(cq.from(entityClass)); 
    return em.createQuery(cq).getResultList(); 
} 

@SuppressWarnings("unchecked") 
protected T findOneResult(String namedQuery, Map<String, Object> parameters) { 
    T result = null; 

    try { 
     Query query = em.createNamedQuery(namedQuery); 

     if (parameters != null && !parameters.isEmpty()) { 
      populateQueryParameters(query, parameters); 
     } 

     result = (T) query.getSingleResult(); 

    } catch (Exception e) { 
     System.out.println("Error while running query: " + e.getMessage()); 
     e.printStackTrace(); 
    } 

    return result; 
} 

private void populateQueryParameters(Query query, Map<String, Object> parameters) { 

    for (Entry<String, Object> entry : parameters.entrySet()) { 
     query.setParameter(entry.getKey(), entry.getValue()); 
    } 
} 
}

DAO類的擴展：

門面接口：

@Local 
public interface TaskFacade { 

public abstract void save(Task task); 

    public abstract Task update(Task task); 

    public abstract void delete(Task task); 

    public abstract Task find(int entityID); 

    public abstract List<Task> findAll(); 

}

...和它的實現：

@Stateless 
public class TaskFacadeImpl implements TaskFacade { 

    @EJB 
    private TaskDAO taskDAO; 

    public void save(Task task) { 
     isTaskWithAllData(task); 

     taskDAO.save(task); 
    } 

    public Task update(Task task) { 
     isTaskWithAllData(task); 

     return taskDAO.update(task); 
    } 

    public void delete(Task task) { 
     taskDAO.delete(task); 
    } 

    public Task find(int entityID) { 
     return taskDAO.find(entityID); 
    } 

    public List<Task> findAll() { 
     return taskDAO.findAll(); 
    } 

    private void isTaskWithAllData(Task task){ 
     boolean hasError = false; 

     if(task == null){ 
      hasError = true; 
     } 

     if(task.getInterval() < 0){ 
      hasError = true; 
     } 

     if(task.getRepeats() < 0){ 
      hasError = true; 
     } 

     if (task.getMail() == null || "".equals(task.getMail().trim())){ 
      hasError = true; 
     } 

     if (hasError){ 
      throw new IllegalArgumentException("The task is missing data. Check the e-mail, it should have value. Interval and repeats should be >= 0 "); 
     } 
    } 
}

從

而且persistence.xml中/ src目錄/ META-INF /：

<?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="CrudPU" transaction-type="JTA"> 
    <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <jta-data-source>jdbc/CrudDS</jta-data-source> 
    <properties> 
     <property name="hibernate.hbm2ddl.auto" value="update"/> 
    </properties> 
</persistence-unit> 
</persistence>

當我試圖執行一些操作（保存（））我收到一個例外：

javax.faces.el.EvaluationException: javax.ejb.EJBTransactionRolledbackException 
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) 
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) 
at javax.faces.component.UICommand.broadcast(UICommand.java:315) 
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) 
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) 
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) 
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) 
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) 
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) 
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) 
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) 
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) 
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) 
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) 
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) 
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) 
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) 
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) 
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) 
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
at java.lang.Thread.run(Thread.java:722) 
Caused by: javax.ejb.EJBTransactionRolledbackException 
at com.sun.ejb.containers.BaseContainer.mapLocal3xException(BaseContainer.java:2314) 
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2096) 
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) 
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) 
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:89) 
at $Proxy235.save(Unknown Source) 
at com.zhalostnikov.dao.__EJB31_Generated__TaskDAO__Intf____Bean__.save(Unknown Source) 
at com.zhalostnikov.facade.TaskFacadeImpl.save(TaskFacadeImpl.java:20) 
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:601) 
at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) 
at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) 
at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) 
at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) 
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) 
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) 
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) 
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:601) 
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) 
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) 
at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) 
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) 
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) 
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:89) 
at $Proxy236.save(Unknown Source) 
at TestBean.doo(TestBean.java:21) 
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:601) 
at com.sun.el.parser.AstValue.invoke(AstValue.java:254) 
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302) 
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) 
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) 
... 32 more 
Caused by: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean 
at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:5071) 
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4906) 
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) 
... 71 more 
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName CrudPU 
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:132) 
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.doTxRequiredCheck(EntityManagerWrapper.java:152) 
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.doTransactionScopedTxCheck(EntityManagerWrapper.java:145) 
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.persist(EntityManagerWrapper.java:263) 
at com.zhalostnikov.dao.GenericDAO.save(GenericDAO.java:27) 
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:601) 
at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) 
at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) 
at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) 
at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) 
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) 
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) 
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) 
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:601) 
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) 
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) 
at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) 
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) 
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) 
... 69 more

看起來持久性單元無法找到，但我找不到原因。請幫幫我吧？

來源

2013-07-13 Vadim

您可以仔細檢查位於war文件中的persistence.xml位於何處？它應該位於myapp.war/WEB-INF/classes/META-INF/persistence.xml中。

如果使用標準的Maven的佈局，您的persistence.xml應該是的src /主/資源/ META-INF /源代碼項目中的persistence.xml

來源

2013-07-13 09:12:46 gerrytan

我把persistence.xml中FIL中的src/main/resources /，並在.war/WEB-INF/classes /文件夾中找到它。這樣對嗎？ – Vadim

錯了。看到我的回答，應該是src/main/resources/META-INF，並且你的結果戰爭應該在.war/WEB-INF/classes/META-INF – gerrytan

上有persistence.xml好的，謝謝。但是，當我嘗試部署時發生下一個錯誤：SEVERE：準備應用程序時發生異常：java.lang.ClassNotFoundException：org.hibernate.ejb.HibernatePersistence – Vadim

java.lang.IllegalStateException：無法檢索unitName的EntityManagerFactory CrudPU

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