EJB3.1 JSF2.0 CDI ejbRef轉換

Question

我正在開發一個使用JSF2.0/Primefaces，EJB3.1，Hibernate的項目。 我創建了一個企業應用程序，使用CDI將EJB3 Facades注入到JSF Managed Beans中，並創建了調用託管bean的網頁。當我運行項目時，我可以列出數據行並查看行詳細信息，但是當我從數據表中選擇一行並單擊編輯或刪除按鈕時，會出現問題。

SEVERE: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.procc.jpa.Alert.responseCollection, could not initialize proxy - no Session 
SEVERE: java.lang.IllegalStateException: Unable to convert ejbRef for ejb AlertFacade to a business object of type interface com.procc.dao.AlertFacadeLocal 
    at com.sun.ejb.containers.EjbContainerServicesImpl.getBusinessObject(EjbContainerServicesImpl.java:114) 
    at org.glassfish.weld.ejb.SessionObjectReferenceImpl.getBusinessObject(SessionObjectReferenceImpl.java:63) 
    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.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105) 
    at com.procc.dao.AlertFacade$Proxy$_$$_Weld$Proxy$.remove(AlertFacade$Proxy$_$$_Weld$Proxy$.java) 
    at com.procc.backing.AlertController.persist(AlertController.java:118) 
    at com.procc.backing.AlertController.delete(AlertController.java:104) 
    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 org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39) 
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) 
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) 
    at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:148) 
    at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88) 
    at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:769) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:300) 
    at javax.faces.component.UIData.broadcast(UIData.java:1093) 
    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) 

這是代碼片段：

@ManagedBean(name = "alertController") 
@SessionScoped 
public class AlertController extends AbstractController<Alert> implements Serializable { 

@Inject private AlertFacadeLocal ejbFacade; 
private Class<Alert> itemClass; 
private Alert selected; 
private List<Alert> items; 

private enum PersistAction { 
    CREATE, 
    DELETE, 
    UPDATE 
} 

public AlertController(){ 
    itemClass = Alert.class; 
} 

public void delete(ActionEvent event) { 
    String msg = ResourceBundle.getBundle("/Bundle").getString(itemClass.getSimpleName() + "Deleted"); 
    persist(AlertController.PersistAction.DELETE, msg); 
    if (!isValidationFailed()) { 
     selected = null; // Remove selection 
     items = null; // Invalidate list of items to trigger re-query. 
    } 
} 

private void persist(AlertController.PersistAction persistAction, String successMessage) { 
    if (selected != null) { 
     this.setEmbeddableKeys(); 
     try { 
      if (persistAction != AlertController.PersistAction.DELETE) { 
       this.ejbFacade.edit(selected); 
      } else { 
       this.ejbFacade.remove(selected); 
      } 
      JsfUtil.addSuccessMessage(successMessage); 
     } catch (EJBException ex) { 
      String msg = ""; 
      Throwable cause = JsfUtil.getRootCause(ex.getCause()); 
      if (cause != null) { 
       msg = cause.getLocalizedMessage(); 
      } 
      if (msg.length() > 0) { 
       JsfUtil.addErrorMessage(msg); 
      } else { 
       JsfUtil.addErrorMessage(ex, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured")); 
      } 
     } catch (Exception ex) { 
      Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, null, ex); 
      JsfUtil.addErrorMessage(ex, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured")); 
     } 
    } 
} 

在JSF頁面，我得到：

<p:panel header="#{bundle.ListAlertTitle}" style="border:0px;"> 

    <p:dataTable id="datalist" value="#{alertController.items}" var="item" 
        selectionMode="single" selection="#{alertController.selected}" 
        rowKey="#{item.alertId}" 
        paginator="true" 
        rows="10" 
        rowsPerPageTemplate="10,20,30" 
        > 

     <p:ajax event="rowSelect" update="viewButton editButton deleteButton"/> 
     <p:ajax event="rowUnselect" update="viewButton editButton deleteButton"/> 
    <p:column sortBy="#{item.alertId}" filterBy="#{item.alertId}"> 
     <f:facet name="header"> 
      <h:outputText value="#{bundle.ListAlertTitle_alertId}"/> 
     </f:facet> 
     <h:outputText value="#{item.alertId}"/> 
    </p:column> 
.... 
<p:commandButton id="viewButton" icon="ui-icon-search" value="#{bundle.View}" update=":AlertViewForm" oncomplete="AlertViewDialog.show()" disabled="#{empty alertController.selected}"/> 
<p:commandButton id="editButton" icon="ui-icon-pencil" value="#{bundle.Edit}" update=":AlertEditForm" oncomplete="AlertEditDialog.show()" disabled="#{empty alertController.selected}"/> 
<p:commandButton id="deleteButton" icon="ui-icon-trash" value="#{bundle.Delete}" actionListener="#{alertController.delete}" update=":growl,datalist" disabled="#{empty alertController.selected}"/> 

Answer 1

奇怪的錯誤！ 我試着做一個明確的轉換到AirportFacade並解決了問題！我不知道爲什麼不能進行隱式轉換？爲什麼它需要從第一位轉換？

if (persistAction != PersistAction.DELETE) { 
    ((AirportFacade)ejbFacade).edit(selected); 
} else { 
    ((AirportFacade)ejbFacade).remove(selected); 
} 

請問，如果有人得到答案讓我知道。 謝謝。