我很难尝试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。
我的应用程序服务器是 WebLogic 12c，它应该支持所有这些开箱即用的功能，但它无法显示错误页面。当我将完全相同的 WAR 部署到 Glassfish 应用程序服务器时，它可以正常工作。
我倾向于将 CDI 部门的错误归咎于 WebLogic，但可以使用一些额外的专业知识来看看我的方法是否错误。
这是我的应用程序试图证明的内容：
在执行重定向后，可以从错误页面引用已经存在的 CDI 托管 Bean
该项目持有单一@SessionScoped托管 bean，用于生成显示在两个页面上的内容welcome页面以及error page.
欢迎页面显示由@SessionScoped豆，并使用@RequestScoped豆子只是扔一个(Runtime)?Exception（这又会启动到错误页面的重定向）。
这是我的相关代码：
-
网络/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>
-
网络/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>
-
网页/错误.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>
-
网页/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/ExceptionGenerateBean.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();
}
}
当我将其部署到 Glassfish 3.1.2 时，按下其中一个按钮时会得到以下输出：
您现在处于错误页面
当前毫秒：1377897262568
另一方面，在 WebLogic 上它会崩溃，并显示以下堆栈跟踪：
####<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)
>
我无法使这个构造发挥作用。有人对我可能忽略的东西有任何指示吗？
