Vaadin、JPA PersistentUnit注入は非常に奇妙な振る舞いをする

Question

私はEJB、JPA、Vaadinを使ってEARアプリケーションを開発しています。アプリケーションサーバー - GlassFish 3.1.1。

ファイルDofApplicationServlet.java

package test.servlet; 

import com.vaadin.Application; 
import com.vaadin.terminal.gwt.server.AbstractApplicationServlet; 
import test.ejb.TestBean; 

import javax.ejb.EJB; 
import javax.persistence.EntityManagerFactory; 
import javax.persistence.PersistenceUnit; 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServletRequest; 

public class DofApplicationServlet extends AbstractApplicationServlet { 
    @EJB 
    private TestBean testBean; 

    @PersistenceUnit(name="mainPU") 
    private EntityManagerFactory emf; 

    @Override 
    protected Application getNewApplication(HttpServletRequest httpServletRequest) throws ServletException { 
     return new DofApplication(testBean, emf); 
    } 

    @Override 
    protected Class<? extends Application> getApplicationClass() throws ClassNotFoundException { 
     return DofApplication.class; 
    } 
} 

ファイルDofApplication.java

package test.servlet; 

import com.vaadin.Application; 
import com.vaadin.ui.Button; 
import com.vaadin.ui.Label; 
import com.vaadin.ui.TextField; 
import com.vaadin.ui.Window; 
import test.ejb.TestBean; 

import javax.persistence.EntityManager; 
import javax.persistence.EntityManagerFactory; 
import javax.persistence.Query; 

public class DofApplication extends Application { 
    private TestBean testBean; 
    private Label labelResult; 
    private Label labelCount; 
    private Label labelUser; 
    private int counter; 
    private EntityManagerFactory emf; 

    public DofApplication(TestBean testBean, EntityManagerFactory emf) { 
     this.testBean = testBean; 
     this.emf = emf; 
    } 

    @Override 
    public void init() { 
     Window wnd = new Window(); 
     final TextField tfLogin = new TextField("login"); 
     wnd.addComponent(tfLogin); 

     final TextField tfPass = new TextField("password"); 
     wnd.addComponent(tfPass); 

     labelResult = new Label("result"); 
     wnd.addComponent(labelResult); 

     labelCount = new Label("Counter"); 
     wnd.addComponent(labelCount); 

     labelUser = new Label("Current user"); 
     wnd.addComponent(labelUser); 

     Button btnLogin = new Button("Login"); 
     wnd.addComponent(btnLogin); 

     Button btnSess = new Button("Session"); 
     wnd.addComponent(btnSess); 


     btnLogin.addListener(new Button.ClickListener() { 
      public void buttonClick(Button.ClickEvent clickEvent) { 
       boolean auth = testBean.checkOracleConnection(tfLogin.getValue().toString(), tfPass.getValue().toString()); 
       if (auth) { 
        labelResult.setCaption("auth ok " + tfLogin.getValue().toString()); 
        labelUser.setCaption("Current username: " + tfLogin.getValue().toString()); 
       } else { 
        labelResult.setCaption("auth fail"); 
        labelUser.setCaption("Current username: NONE"); 
       } 

      } 
     }); 

     btnSess.addListener(new Button.ClickListener() { 
      public void buttonClick(Button.ClickEvent clickEvent) { 
       EntityManager em = emf.createEntityManager(); // <-- emf is not null here in debugger, but call always returns exception 
       Query q = em.createQuery("SELECT c FROM CountryEntity c"); 

      } 
     }); 


     setMainWindow(wnd); 
    } 


} 

、例外私はbtnSessのクリックハンドラに入った：

[#|2011-09-09T17:42:51.769+0600|SEVERE|glassfish3.1.1|com.vaadin.Application|_ThreadID=20;_ThreadName=Thread-2;|Terminal error: 
com.vaadin.event.ListenerMethod$MethodException 
Cause: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName mainPU 
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510) 
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164) 
    at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1193) 
    at com.vaadin.ui.Button.fireClick(Button.java:539) 
    at com.vaadin.ui.Button.changeVariables(Button.java:206) 
    at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1299) 
    at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1219) 
    at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:735) 
    at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296) 
    at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539) 
    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 com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98) 
    at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174) 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828) 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725) 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019) 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225) 
    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:662) 
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName mainPU 
    at com.sun.enterprise.container.common.impl.EntityManagerFactoryWrapper.getDelegate(EntityManagerFactoryWrapper.java:100) 
    at com.sun.enterprise.container.common.impl.EntityManagerFactoryWrapper.createEntityManager(EntityManagerFactoryWrapper.java:110) 
    at test.servlet.DofApplication$2.buttonClick(DofApplication.java:86) 
    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 com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:490) 
    ... 35 more 
|#] 

しかし、デバッガで私は以下を参照してください。 ：

EARファイル構造は

ear.ear 
-- META-INF 
---- application.xml 
---- persistence.xml 
-- ejb.jar 
-- war.war 

Answer 1

私はこのことを考える...

protected Application getNewApplication(HttpServletRequest httpServletRequest) throws ServletException { 
    return new DofApplication(testBean, emf); 
} 

...ここで問題が発生することがあります。コンテナは、後続のリクエストで異なるエンティティマネージャファクトリを注入します。したがって、DofApplicationのインスタンスを作成し、そのemfを渡す場合は、無効なemfに対してcreateEntityManager（）を呼び出すことができます。

EntityManagerFactory emf = Persistence.createEntityManagerFactory("mainPU"); 
em = emf.createEntityManager(); 

Answer 2

は、EJBにビジネスロジックを入れて：あなたはとてもINIT内の（）のようなEMを取得しようとすることができ、これをテストするには

！ 設定EJB：

•そこ

をpersistence.xmlのを置く•などがentitymanagersをプログラムの開発といくつかのセッションBeanに

を提供•（WebおよびEJB）CDIを有効における

• webはvaadinサーブレットクラスを拡張するwebservlet（@WebServletアノテーション）を提供します

@WebServlet(urlPatterns = "/*") 
public class VaadinAppServlet extends AbstractApplicationServlet { 

    @Inject 
    VaadinApp application; 

    @Override 
    protected Class<? extends Application> getApplicationClass() throws ClassNotFoundException { 
     return VaadinApp.class; 
    } 

    @Override 
    protected Application getNewApplication(HttpServletRequest request) throws ServletException { 
     return application; 
    } 
} 



@SessionScoped 
public class VaadinApp extends Application { 
    //@Inject //if resource is annotated as @named 
    @EJB //if resource is a session bean 
} 

例foun dと、多くの場合、ここから使用： https://vaadin.com/wiki/-/wiki/Main/Creating+JEE6+Vaadin+Applications

スクロール「オプション2：javax.persistence.PersistenceException：いいえ永続使用コンテキストと依存性注入（CDI）