从Facelets错误页面引用CDI托管bean [英] Referencing CDI managed bean from Facelets error page

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问题描述

我很难让通用错误页面在使用JSF 2，Facelets和CDI的(非常简单的)WAR项目中工作.

I'm having a hard time trying to get a generic error-page to work in a (really simple) WAR project that uses JSF 2, Facelets and CDI.

我的应用程序服务器是WebLogic 12c，它应支持所有现成的功能，但是无法显示错误页面.当我将完全相同的WAR部署到Glassfish应用程序服务器时，它可以工作.

My application server is WebLogic 12c, which should support all of this out-of-the-box, but it fails to show the error page. When I deploy the exact same WAR to a Glassfish application server, it works.

我倾向于将WebLogic归咎于CDI部门的错误，但可以使用一些额外的专业知识来确定我的方法是否错误.

I'm leaning towards blaming WebLogic for being buggy in the CDI department, but could use some additional expertise to see if my approach is wrong.

这是我的应用程序要证明的内容:

Here's what my application is trying to proof:

执行重定向后，可以从错误页面引用一个已经存在的CDI托管Bean

One can reference an already existing CDI managed bean from an error page after a redirect to it has been performed

项目包含一个单独的@SessionScoped受管bean，用于生成在 welcome 页和 error 页上显示的内容.

The project holds a single @SessionScoped managed bean that is used to generates content that is shown on both the welcome page as well as the error page.

欢迎页面显示@SessionScoped bean生成的内容，并使用@RequestScoped bean抛出(Runtime)?Exception(这反过来会引发到错误页面的重定向).

The welcome page displays content generated by the @SessionScoped bean, and uses a @RequestScoped bean to just throw a (Runtime)?Exception (which in turn initiates a redirect to the error page).

这是我的相关代码:

  • web/WEB-INF/beans.xml 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/beans_1_0.xsd">
</beans>

  • web/WEB-INF/web.xml 

    <?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>
    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>/faces/*</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>faces/index.xhtml</welcome-file>
    </welcome-file-list>
    <error-page>
        <exception-type>java.lang.Throwable</exception-type>
        <location>/faces/error.xhtml?faces-redirect=true</location>
    </error-page>
    <error-page>
        <error-code>500</error-code>
        <location>/faces/error.xhtml?faces-redirect=true</location>
    </error-page>
</web-app>

  • web/error.xhtml 

    <?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html">
    <h:head>
        <title>Error page</title>
    </h:head>
    <h:body>
        <h1>You are now on the error page</h1>

        <h3>Current milliseconds: #{sessionScopedBean.milliseconds}</h3>
    </h:body>
</html>

  • web/index.xhtml 

    <?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html">
    <h:head>
        <title>Generate exception</title>
    </h:head>
    <h:body>
        <h1>Please generate an exception of some sorts</h1>

        <h1>Current milliseconds: #{sessionScopedBean.milliseconds}</h1>

        <h:form>
            <h:commandButton action="#{exceptionGeneratingBean.generateException()}" value="Exception" />
            <h:commandButton action="#{exceptionGeneratingBean.generateRuntimeException()}" value="RuntimeException" />
        </h:form>
    </h:body>
</html>

  • src/java/nl/rensvanleeuwen/bean/ExceptionGeneratingBean.java 

    package nl.rensvanleeuwen.bean;

import javax.enterprise.context.RequestScoped;
import javax.inject.Named;

@RequestScoped
@Named
public class ExceptionGeneratingBean {

    public void generateRuntimeExcetion() {
        throw new RuntimeException("Here is the exception!");
    }

    public void generateException() throws Exception {
        throw new Exception("Here is the exception!");
    }
}

  • src/java/nl/rensvanleeuwen/bean/SessionScopedBean.java 

    package nl.rensvanleeuwen.bean;

import java.io.Serializable;
import javax.enterprise.context.SessionScoped;
import javax.inject.Named;

@Named
@SessionScoped
public class SessionScopedBean implements Serializable {

    public long getMilliseconds() {
        return System.currentTimeMillis();
    }
}

    • 将其部署到Glassfish 3.1.2时，当按下其中一个按钮时，会得到以下输出:

    When I deploy this to Glassfish 3.1.2, I get the following output when one of the buttons is pressed:

    另一方面，在WebLogic上，它崩溃了，并显示以下堆栈跟踪:

    On WebLogic, on the other hand it blows up, and the following stacktrace is shown:

    ####<Aug 30, 2013 11:24:26 PM CEST> <Error> <HTTP> <rens7> <131Server> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1377897866330> <BEA-101107> <[ServletContext@2045981067[app:_appsdir_ErrorPageTest_war module:ErrorPageTest.war path:null spec-version:3.0]] Problem occurred while serving the error page.
javax.servlet.ServletException: WELD-001303 No active contexts for scope type javax.enterprise.context.SessionScoped
  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:606)
  at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:242)
  at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:216)
  at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:132)
  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:338)
  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:221)
  at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:564)
  at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:263)
  at weblogic.servlet.internal.ForwardAction.run(ForwardAction.java:22)
  at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
  at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
  at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
  at weblogic.servlet.internal.ErrorManager.handleException(ErrorManager.java:144)
  at weblogic.servlet.internal.WebAppServletContext.handleThrowableFromInvocation(WebAppServletContext.java:2239)
  at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2089)
  at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1514)
  at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:254)
  at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
  at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Caused By: org.jboss.weld.context.ContextNotActiveException: WELD-001303 No active contexts for scope type javax.enterprise.context.SessionScoped
  at org.jboss.weld.manager.BeanManagerImpl.getContext(BeanManagerImpl.java:612)
  at org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:71)
  at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:79)
  at nl.rensvanleeuwen.bean.SessionScopedBean$Proxy$_$$_WeldClientProxy.getMilliseconds(SessionScopedBean$Proxy$_$$_WeldClientProxy.java)
  at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:601)
  at javax.el.BeanELResolver.getValue(BeanELResolver.java:305)
  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.AstValue.getValue(AstValue.java:138)
  at com.sun.el.parser.AstValue.getValue(AstValue.java:184)
  at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)
  at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
  at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
  at com.sun.faces.facelets.el.ELText$ELTextVariable.writeText(ELText.java:227)
  at com.sun.faces.facelets.el.ELText$ELTextComposite.writeText(ELText.java:150)
  at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:85)
  at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82)
  at com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:183)
  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 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 weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:242)
  at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:216)
  at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:132)
  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:338)
  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:221)
  at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:564)
  at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:263)
  at weblogic.servlet.internal.ForwardAction.run(ForwardAction.java:22)
  at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
  at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
  at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
  at weblogic.servlet.internal.ErrorManager.handleException(ErrorManager.java:144)
  at weblogic.servlet.internal.WebAppServletContext.handleThrowableFromInvocation(WebAppServletContext.java:2239)
  at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2089)
  at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1514)
  at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:254)
  at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
  at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
>

    我无法使此构造工作.有人对我可能忽略的东西有任何指示吗?

    I haven't been able to make this construct work. Does anybody have any pointers to stuff that I might have overlooked?

    推荐答案

    现在在Oracle球场上.已针对WebLogic 12.1.1.0报告了错误17410908.

    The ball is in the court of Oracle now. Bug 17410908 was reported against WebLogic 12.1.1.0.

    这篇关于从Facelets错误页面引用CDI托管bean的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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