java.lang.IllegalStateException：无法检索unitName CrudPU的EntityManagerFactory

Question

我需要为新工作执行测试任务，但似乎我陷入了昏迷状态。 我在持久化上下文方面遇到了一些问题。 我使用Glassfish 3和本教程： http ： //uaihebert.com/？p = 834

已在服务器上配置jdbc / CrudDS，ping成功。 部署应用程序时，我只在“引擎”列中看到了ejb，web，但没有看到JPA引擎。

这是Entity 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();
}


}

这是我的DAO抽象类：

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());
    }
}
}

扩展DAO类：

@Stateless 
public class TaskDAO extends GenericDAO<Task>{

public TaskDAO() {
    super(Task.class);
}

public void delete(Task task) {
    super.delete(task.getId(), Task.class);
}

}

门面界面：

@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();

}

......它的实施：

@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 ");
        }
    }
}

来自/ src / META-INF /的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="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>

当我尝试执行某些操作（save（））时，我得到一个异常：

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

看起来无法找到持久性单元，但我找不到原因。 enybody可以帮我吗？

Answer 1

你能仔细检查你的war文件中persistence.xml的位置吗？ 它应该在myapp.war / WEB-INF / classes / META-INF / persistence.xml上。

如果使用标准maven布局，则persistence.xml应位于源代码项目中的src / main / resources / META-INF / persistence.xml中