org.jboss.weld.exceptions.WeldException: WELD-000049:无法调用私有v

Question

由于某种原因，下面的代码不能工作，我不明白为什么。通过对几个细微的变化进行处理，我目前的想法是，因为bean是在ExternalContext出现之前创建的，所以会导致异常。然而，ExternalContext应该在这一点上存在，至少我是这样认为的。

我有一些变通的想法，例如在LoginBean中实例化MessageProvider类并将其发送到MessagesBean以供以后使用，但我更喜欢使用与下面格式相近的会话bean，而不是让它充当包装器。如果你能解释一下为什么这样做失败了，如果可能的话，我将非常感激。

下面是两个主要关注的类:

LoginBean

@Named( value = "loginBean")
@RequestScoped
public class LoginBean {
    private static final Logger LOG = Logger.getLogger(LoginBean.class.getName());
    @Inject
    private MessagesBean messagesBean;
    @Inject
    private LoginFormBean loginFormBean;
    @Inject
    private PersonBean personBean;
    @Inject
    private PersonFacade personFacade;
    @NotNull
    private String username;
    @NotNull
    private String password;
    public LoginBean() {
    }

    /**
     * Get the value of username
     *
     * @return the value of username
     */
    public String getUsername() {
        return username;
    }
    /**
     * Set the value of username
     *
     * @param username new value of username
     */
    public void setUsername(String username) {
        this.username = username;
    }
    /**
     * Get the value of password
     *
     * @return the value of password
     */
    public String getPassword() {
        return password;
    }
    /**
     * Set the value of password
     *
     * @param password new value of password
     */
    public void setPassword(String password) {
        this.password = password;
    }
    public String login() {
        Person person = personFacade.find(username);
        if(person != null && person.getPasswordHash().equals(password)) {
            personBean.setPerson(person);
            return "success";
        }
        else {
            messagesBean.setMessage(
                    loginFormBean.getUsernameInput().getClientId(),
                    "login.failed");
            return "failure";
        }
    }
    public String logout() {
        return null; 
    }
}

MessagesBean

@Named(value = "messagesBean")
@SessionScoped
public class MessagesBean implements Serializable {
    private static final long serialVersionUID = 1L;
    private FacesContext facesContext;
    private Locale locale;
    private ResourceBundle messageBundle;
    /**
     * Creates a new instance of MessagesBean
     */
    public MessagesBean() {
    }
    @PostConstruct
    private void init()
    {
        facesContext = FacesContext.getCurrentInstance();
        locale = facesContext.getExternalContext().getRequestLocale();
        messageBundle = 
                ResourceBundle.getBundle(
                        facesContext.getApplication().getMessageBundle(),
                        locale);

    }
    public void setMessage(String clientId, String messageKey)
    {
        FacesMessage facesMessage =
                new FacesMessage(messageBundle.getString(messageKey));
        facesContext.addMessage(clientId, facesMessage);
    }
}

下面是上述类发生错误的堆栈跟踪:

javax.faces.el.EvaluationException: org.jboss.weld.exceptions.WeldException: WELD-000049: Unable to invoke private void com.healthdataviews.healthdataviewstrial.support.MessagesBean.init() on com.healthdataviews.healthdataviewstrial.support.MessagesBean@1126aa67
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
    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:790)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
    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:198)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:416)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:283)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.jboss.weld.exceptions.WeldException: WELD-000049: Unable to invoke private void com.healthdataviews.healthdataviewstrial.support.MessagesBean.init() on com.healthdataviews.healthdataviewstrial.support.MessagesBean@1126aa67
    at org.jboss.weld.injection.producer.DefaultLifecycleCallbackInvoker.invokeMethods(DefaultLifecycleCallbackInvoker.java:100)
    at org.jboss.weld.injection.producer.DefaultLifecycleCallbackInvoker.postConstruct(DefaultLifecycleCallbackInvoker.java:81)
    at org.jboss.weld.injection.producer.BasicInjectionTarget.postConstruct(BasicInjectionTarget.java:126)
    at org.jboss.weld.bean.ManagedBean.create(ManagedBean.java:162)
    at org.jboss.weld.util.bean.IsolatedForwardingBean.create(IsolatedForwardingBean.java:45)
    at org.jboss.weld.context.AbstractContext.get(AbstractContext.java:96)
    at org.jboss.weld.context.PassivatingContextWrapper$AbstractPassivatingContextWrapper.get(PassivatingContextWrapper.java:76)
    at org.jboss.weld.bean.ContextualInstanceStrategy$DefaultContextualInstanceStrategy.get(ContextualInstanceStrategy.java:101)
    at org.jboss.weld.bean.ContextualInstanceStrategy$CachingContextualInstanceStrategy.get(ContextualInstanceStrategy.java:178)
    at org.jboss.weld.bean.ContextualInstance.get(ContextualInstance.java:50)
    at org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:99)
    at org.jboss.weld.bean.proxy.ProxyMethodHandler.getInstance(ProxyMethodHandler.java:125)
    at com.healthdataviews.healthdataviewstrial.support.MessagesBean$Proxy$_$$_WeldClientProxy.setMessage(Unknown Source)
    at com.healthdataviews.healthdataviewstrial.controller.ejb.LoginBean.login(LoginBean.java:100)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:289)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
    ... 36 more

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更新

我发现了错误发生的确切位置。当我调用getMessageBundle时，我得到一个NullPointerException，这导致ResourceBundle.getBundle()搜索一个空包，这导致它在@PostConstruct init()上崩溃。新问题:我如何链接我的消息。属性到getMessageBundle()调用，或者我应该把它翻译成getResourceBundle("bundle")吗?

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更新

我通过在我的faces-config.xml中设置<message-bundle>使其工作。除了将其声明为<resource-bundle>之外，是否有任何方法可以在不加载每个.xhtml文件的情况下包含它?

Answer 1

请检查不等于null @Postconstruct方法中messageBundle的语句

。

if(messageBundle != null)
     messageBundle = ResourceBundle.getBundle(
                        facesContext.getApplication().getMessageBundle(),
                        locale);