Question

我尝试在POJO中查找@Stateless bean，它位于bean所在的同一个包中。当我在@ManagedBean控制器类中使用它时，bean不为null，我可以执行CRUD操作。这是在ArticlesBundle.java中查找的代码：

public class ArticlesBundle extends ResourceBundle{                 
protected static final String BASE_NAME = "ArticlesLcl.findForLocale";
private Map<String,String> messages = new HashMap<>();            
private Locale locale = FacesContext.getCurrentInstance().getViewRoot().getLocale();
protected final Control DB_CONTROL = new DBControl();       

public ArticlesBundle(){        
    setParent(ResourceBundle.getBundle(BASE_NAME, FacesContext.getCurrentInstance().getViewRoot().getLocale(), DB_CONTROL));
}        

protected ArticlesBundle(Locale locale){        
    setParent(ResourceBundle.getBundle(BASE_NAME, locale, DB_CONTROL));        
}  

public ArticlesBundle(Map<String,String> messages){
    this.messages = messages;
}        

@Override
protected Object handleGetObject(String key){        
    return messages != null ? messages.get(key) : parent.getObject(key);
}

@Override
public Enumeration<String> getKeys(){        
    return parent.getKeys();
}

protected class DBControl extends Control{
    @Override
    public ResourceBundle newBundle
            (String baseName, Locale locale, String format, ClassLoader loader, boolean reload)
            throws IllegalAccessException, InstantiationException, IOException
    {                             
        String language = locale.getLanguage();
        Map<String,String> messages = getArticless(locale); 

        System.out.println("getArticles("+language+") = "+getArticles(locale));
        return new ArticlesBundle(messages);
    }         
    public Map<String,String> getArticles(Locale locale){            
        String language = locale.getLanguage();
        try {            
            Context ctx = new InitialContext();            
            ArticlesLclFacade arBean = (ArticlesLclFacade) ctx.lookup("java:gesht/ArticlesLclFacade");
            List<ArticlesLcl> articles = arBean.getArticles(language);
            for(Iterator<ArticlesLcl> it = articles.iterator(); it.hasNext();){
                ArticlesLcl article = it.next();
                messages.put(article.getArId().getArId().toString(), article.getArTitle());                
            }                                          

        } catch (NamingException ex) {
            Logger.getLogger(test.class.getName()).log(Level.SEVERE, null, ex);
        } 

        return messages;
    }        
}        
}

在ArticlesFacade中：

@Stateless
public class ArticlesFacade extends AbstractFacade<ArticlesLcl> {
@PersistenceContext(unitName = "gtestPU")
private EntityManager em;

@Override
protected EntityManager getEntityManager() {
    return em;
}

public ArticlesFacade() {
    super(ArticlesLcl.class);
}
public List<ArticlesLcl> getArticless(String language){
    Query q = em.createNamedQuery("ArticlesLcl.findForLocale", ArticlesLcl.class);
    q.setParameter("lang", language);
    return q.getResultList();
}
}

faces-config.xml中

<resource-bundle>
        <base-name>com.gesht.bundles.ArticlesBundle</base-name>
        <var>article</var>
    </resource-bundle>

抛出以下异常：

SEVERE: javax.naming.NamingException: Lookup failed for 'java:gtest/ArticlesLclFacade' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: No object bound to name java:gtest/ArticlesLclFacade]
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
    at javax.naming.InitialContext.lookup(InitialContext.java:411)
    at javax.naming.InitialContext.lookup(InitialContext.java:411)      
    at java.util.ResourceBundle.loadBundle(ResourceBundle.java:1436)
    at java.util.ResourceBundle.findBundle(ResourceBundle.java:1400)
    at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1296)
    at java.util.ResourceBundle.getBundle(ResourceBundle.java:841)
    at com.gtest.bundles.test.<init>(test.java:50)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at java.lang.Class.newInstance0(Class.java:372)
    at java.lang.Class.newInstance(Class.java:325)
    at java.util.ResourceBundle$Control.newBundle(ResourceBundle.java:2571)
    at java.util.ResourceBundle.loadBundle(ResourceBundle.java:1436)
    at java.util.ResourceBundle.findBundle(ResourceBundle.java:1400)
    at java.util.ResourceBundle.findBundle(ResourceBundle.java:1354)
    at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1296)
    at java.util.ResourceBundle.getBundle(ResourceBundle.java:1028)
    at com.sun.faces.application.ApplicationResourceBundle.getResourceBundle(ApplicationResourceBundle.java:124)
    at com.sun.faces.application.ApplicationAssociate.getResourceBundle(ApplicationAssociate.java:608)
    at com.sun.faces.application.ApplicationImpl.getResourceBundle(ApplicationImpl.java:700)
    at javax.faces.application.ApplicationWrapper.getResourceBundle(ApplicationWrapper.java:526)
    at com.sun.faces.el.FacesResourceBundleELResolver.getValue(FacesResourceBundleELResolver.java:83)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:103)
    at com.sun.el.parser.AstValue.getValue(AstValue.java:179)
    at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
    at javax.faces.component.UIOutput.getValue(UIOutput.java:169)
    at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:205)
    at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:355)
    at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:164)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeDynamicBody(PanelGridRenderer.java:92)
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeBody(PanelGridRenderer.java:60)
    at org.primefaces.component.panelgrid.PanelGridRenderer.encodeEnd(PanelGridRenderer.java:49)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
    at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:61)
    at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:45)
    at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:59)
    at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:45)
    at org.primefaces.component.datagrid.DataGridRenderer.encodeTable(DataGridRenderer.java:156)
    at org.primefaces.component.datagrid.DataGridRenderer.encodeMarkup(DataGridRenderer.java:91)
    at org.primefaces.component.datagrid.DataGridRenderer.encodeEnd(DataGridRenderer.java:53)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1757)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
    at org.ocpsoft.rewrite.faces.RewriteViewHandler.renderView(RewriteViewHandler.java:186)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:288)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:191)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
    at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
    at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
    at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
    at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
    at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
    at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$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.naming.NameNotFoundException: No object bound to name java:gtest/ArticlesLclFacade
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:772)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:744)
    at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:177)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:498)
    ... 108 more

我使用Glassfish Server 3 +

Answer 1

@Stateless(mappedName="articlesLclFacade")
public class ArticlesLclFacade extends AbstractFacade {

然后在你的try子句中

ArticlesLclFacade arBean = (ArticlesLclFacade)ctx.lookup("articlesLclFacadee");

或者我猜你也可以使用EJB注释：

@EJB
private ArticlesLclFacade arBean;

Answer 2

我使用了语法ArticlesLclFacade arBean = (ArticlesLclFacade) ctx.lookup("java:global/gtest/ArticlesLclFacade");，并且不再有NamingException抛出。

在POJO类中查找locale EJB会引发NameNotFoundException

2 个答案: