You need to implement a custom ExceptionHandler
for this which does basically the following when an exception occurs in an ajax request:
String errorPageLocation = "/WEB-INF/errorpages/500.xhtml";
context.setViewRoot(context.getApplication().getViewHandler().createView(context, errorPageLocation));
context.getPartialViewContext().setRenderAll(true);
context.renderResponse();
This is not exactly trivial if you want to take web.xml
error pages into account. You’d need to parse the entire web.xml
for this to find the error page locations. Also, when the exception occurred during render response, then you’d basically need to rebuild the whole view yourself. The OmniFaces component library has exactly such an exception handler, the FullAjaxExceptionHandler
. You can find the full source code here and the showcase example here.