| RE: [aspectj-users] Logging, but not catching exceptions |
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Hi Ian, Even if you do name the throwable in the
after throwing advice, it still won’t catch it. Here’s an example
that logs an exception once when it is first encountered and lets it be handled
up the calling tree: import java.util.WeakHashMap; public class AfterThrowingExample { public static void
main(String args[]) {
try {
throwIt();
} catch (Exception e) {
System.err.println("Caught in main ");
} } private static void
throwIt() throws Exception {
helper(); } private static void
helper() throws Exception {
throw new Exception("boom"); } } aspect TraceThrowing { WeakHashMap alreadySeen
= new WeakHashMap(); pointcut scope() :
within(AfterThrowingExample); after() throwing
(Throwable t) : scope() && execution(* *(..)) {
// could also look for getCause()...
if (alreadySeen.get(t) == null) {
alreadySeen.put(t, ""); // register existence
System.err.println("TODO: log occurance of "+t);
//i.e., logger.log("error", t);
} } } Example output: TODO: log occurance of
java.lang.Exception: boom Caught in main From:
aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Orford, Ian I'm
using an "after() throwing :" advice that doesn't name/catch an
exception. Is
there anyway to get a hold of the thrown Throwable so that I can log it?
Alternatively,
is there a way to use an "after() throwing (Throwable t) :" advice
that doesn't actually catch the exception? Thanks,
Ian
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