Programmatically navigate to error page in JSF 2.0

Question

In my application I am willing to navigate to an error page whenever an exception occurred. The RuntimeException is handled and checked and is thrown again. For that I have defined a global navigation rule in Faces config:

<navigation-rule>
    <from-view-id>*</from-view-id>
    <navigation-case>
        <from-outcome>error</from-outcome>
        <to-view-id>/error.xhtml</to-view-id>
    </navigation-case>
</navigation-rule>

And in my catch block I am trying to navigate as:

FacesContext fctx = FacesContext.getCurrentInstance();
Application application = fctx.getApplication();
NavigationHandler navHandler = application.getNavigationHandler();
navHandler.handleNavigation(fctx,null, "error");

But it is not working. I am throwing an Exception forcefully but it is not navigating to the desired error page.

Any pointer would be very helpful to me.

This is not exactly the right way of handling exceptions in JSF. Long story short, check [this demo page](https://showcase-omnifaces.rhcloud.com/showcase/exceptionhandlers/FullAjaxExceptionHandler.xhtml). — BalusC, Nov 25 '12 at 12:25

score 1 · Answer 1 · answered Nov 24 '12 at 14:42

I would like to suggest to redirect error page using ExternalContext. You have to configure your Exception in web.xml

FacesContext context = FacesContext.getCurrentInstance();
ExternalContext extContext = context.getExternalContext();
String url = extContext.encodeActionURL(extContext.getRequestContextPath() + "/error");
extContext.redirect(url);

web.xml

<error-page>
    <exception-type>java.lang.Exception</exception-type>
    <location>/error</location>
</error-page>

If you use Jboss-Seam, it is easy to redirect the error/warnning pages base on the exception.

pages.xml

<exception class="org.jboss.seam.security.NotLoggedInException">
    <redirect view-id="/login.xhtml">
        <message severity="warn">#{messages['org.jboss.seam.NotLoggedIn']}</message>
    </redirect>
</exception>

<exception>
    <redirect view-id="/error.xhtml">
        <message severity="error">Unexpected error, please try again</message>
    </redirect>
</exception>

Programmatically navigate to error page in JSF 2.0

1 Answers1