Error pages for exceptions during page rendering
In the beans backup of my JSF application, some exceptions can be thrown at any time, and I want to respond to that by redirecting an error page. I have included omnifaces FullAjaxExceptionHandler and mine web.xml
contains
<error-page>
<exception-type>my.own.ResourceNotFoundException</exception-type>
<location>/error/error404.xhtml</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/error/error500.xhtml</location>
</error-page>
Most of the time, including Ajax requests, this works great: ResourceNotFoundException
takes me to an error page. However, when an exception is thrown by a method annotated with @PostConstruct
, I always get a generic page for a 500 error code.
Is it because JSF is wrapping the exception in something else, and the engine in web.xml
doesn't recognize it? If so, how can I get this to work as expected?
Here is the trace of the exception I see in the server log:
Feb 07, 2013 11:08:32 AM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/my/projects/details/details.xhtml]
javax.el.ELException: //P:/codebase/code/portal/jsf-impl/target/classes/META-INF/resources/common/title.xhtml: Bei der Ressourcen-Einspeisung auf dem verwalteten Bean projectDetailsController ist ein Fehler aufgetreten.
at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:90)
at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:302)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:309)
at com.sun.faces.renderkit.html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:105)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
at com.sun.faces.renderkit.html_basic.CompositeRenderer.encodeChildren(CompositeRenderer.java:78)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125)
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.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at my.own.filters.SecurityFilter.doFilter(SecurityFilter.java:48)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:185)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.__invoke(StandardHostValve.java:151)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at my.own.UTF8Valve.invoke(UTF8Valve.java:34)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: com.sun.faces.mgbean.ManagedBeanCreationException: Bei der Ressourcen-Einspeisung auf dem verwalteten Bean projectDetailsController ist ein Fehler aufgetreten.
at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:229)
at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:105)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:71)
at org.apache.el.parser.AstValue.getValue(AstValue.java:147)
at org.apache.el.parser.AstDeferredExpression.getValue(AstDeferredExpression.java:44)
at org.apache.el.parser.AstCompositeExpression.getValue(AstCompositeExpression.java:50)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
at javax.faces.component.UIComponentBase$AttributesMap.get(UIComponentBase.java:2362)
at com.sun.faces.el.CompositeComponentAttributesELResolver$ExpressionEvalMap.get(CompositeComponentAttributesELResolver.java:345)
at javax.el.MapELResolver.getValue(MapELResolver.java:52)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at org.apache.el.parser.AstValue.getValue(AstValue.java:169)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
at com.sun.faces.facelets.el.ELText$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)
... 43 more
Caused by: com.sun.faces.spi.InjectionProviderException
at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:119)
at com.sun.faces.vendor.WebContainerInjectionProvider.invokePostConstruct(WebContainerInjectionProvider.java:99)
at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:223)
... 66 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:117)
... 68 more
Caused by: my.own.ResourceNotFoundException: Did not find project
at my.own.projects.details.ProjectDetailsController.createModel(ProjectDetailsController.java:198)
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1 answer
As your log shows, ResourceNotFoundException
there are four other exceptions.
You could create your own CustomExceptionHandler like the one in the Duke Forest example instead of using the almighty FullAjaxExceptionHandler or even extend it and go down until you reach ResourceNotFoundException
, then use NavigationHandler
to redirect to the page with the required error.
Here's an edited version of the related classes and faces-config.xml from the Duke Forest example. This should work as you expect, even if the exception occurs in the method @PostConstruct
:
CustomExceptionHandlerFactory.java
package com.forest.exception;
public class CustomExceptionHandlerFactory extends ExceptionHandlerFactory {
private ExceptionHandlerFactory parent;
// this injection handles jsf
public CustomExceptionHandlerFactory(ExceptionHandlerFactory parent) {
this.parent = parent;
}
@Override
public ExceptionHandler getExceptionHandler() {
ExceptionHandler handler = new CustomExceptionHandler(parent.getExceptionHandler());
return handler;
}
}
CustomExceptionHandler.java
package com.forest.exception;
public class CustomExceptionHandler extends ExceptionHandlerWrapper {
private static final Logger log = Logger.getLogger(CustomExceptionHandler.class.getCanonicalName());
private ExceptionHandler wrapped;
CustomExceptionHandler(ExceptionHandler exception) {
this.wrapped = exception;
}
@Override
public ExceptionHandler getWrapped() {
return wrapped;
}
private boolean includesResourceNotFoundException(Throwable t) {
if(t == null) {
return false;
else {
return t instanceof ResourceNotFoundException || includesResourceNotFoundException(t.getCause());
}
}
@Override
public void handle() throws FacesException {
final Iterator<ExceptionQueuedEvent> i = getUnhandledExceptionQueuedEvents().iterator();
while (i.hasNext()) {
ExceptionQueuedEvent event = i.next();
ExceptionQueuedEventContext context =
(ExceptionQueuedEventContext) event.getSource();
// get the exception from context
Throwable t = context.getException();
final FacesContext fc = FacesContext.getCurrentInstance();
final Map<String, Object> requestMap = fc.getExternalContext().getRequestMap();
final NavigationHandler nav = fc.getApplication().getNavigationHandler();
//here you do what ever you want with exception
if(hasResourceNotFoundException(t) {
try {
//log error ?
log.log(Level.SEVERE, "Critical Exception!", t);
//redirect error page
requestMap.put("exceptionMessage", t.getMessage());
nav.handleNavigation(fc, null, "/error/error500?face-redirect=true");
fc.renderResponse();
} finally {
//remove it from queue
i.remove();
}
}
}
//parent hanle
getWrapped().handle();
}
}
faces-config.xml (partial)
<factory>
<exception-handler-factory>
com.forest.exception.CustomExceptionHandlerFactory
</exception-handler-factory>
</factory>
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