Question

I use Tomcat 7 and Lo4j for all my server logs and GWT for client (only AJAX calls).
All my unhandled exceptions get logged in my catalina.log.

Now I want to catch all exceptions and add some of the user’s specific Tomcat SessionData.

There are several ways:

• Try catch over all servlets (there must be a better solution).
• http://tomcat.apache.org/tomcat-7.0-doc/aio.html: I would have to change my connecter, and I don’t know if I could use the Tomcat Session within the Event Handler (EventType.ERROR).
• Better way?

What would be the best way to achieve this?

Answer 1

Just Overriding the GWT function doUnexpectedFailure worked.

@Override
protected void doUnexpectedFailure(Throwable t) {
  ServerLog.error(t.getMessage(), t);
  super.doUnexpectedFailure(t);
}