[DELTASPIKE-165] Exception handlers: support handling unexpected exceptions

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Fix Version/s: 0.4
• Component/s: ExceptionControl-Module
• Assignee: Jason Porter
• Reporter: Ivo Maixner
• Created: 17/Apr/12 07:41
• Updated: 23/Apr/13 19:08
• Resolved: 23/Apr/13 19:08

Description

Provide a way to handle exceptions not handled by any other handler.

Currently, a handler like this:
public void unexpectedException(@Handles CaughtException<Throwable> event) {
if (!event.isMarkedHandled())

{ log.error("Unexpected exception", event.getException()); messages.error(new BundleKey(MESSAGE_BUNDLE, "unexpected.exception")); }

}
gets in the way when there are other handlers which respond to non-root-cause exceptions.

Some ideas:

• an UnhandledException event fired as a last chance to handle it before re-throwing it as unhandled
• a third traversal type - after BREADTH_FIRST and DEPTH_FIRST

See https://community.jboss.org/thread/198408