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/*
* Copyright (c) 1998-2002 PARC Inc. All rights reserved.
*
* Use and copying of this software and preparation of derivative works based
* upon this software are permitted. Any distribution of this software or
* derivative works must comply with all applicable United States export
* control laws.
*
* This software is made available AS IS, and PARC Inc. makes no
* warranty about the software, its performance or its conformity to any
* specification.
*/
import java.util.*;
import java.io.*;
import org.aspectj.lang.*;
/** @author Wes Isberg */
public aspect MainFailure {
public static void main (String[] args) { TargetClass.main(args); }
pointcut main(String[] args) :
args(args) && execution(public static void main(String[]));
// article page 42 - recording failures from main
// START-SAMPLE testing-inoculated-failureCapture Log failures
/** log after failure, but do not affect exception */
after(String[] args) throwing (Throwable t) : main(args) {
logFailureCase(args, t, thisJoinPoint);
}
// END-SAMPLE testing-inoculated-failureCapture
// alternate to swallow exception
// /** log after failure and swallow exception */
// Object around() : main(String[]) {
// try {
// return proceed();
// } catch (Error e) { // ignore
// logFailureCase(args, t, thisJoinPoint);
// // can log here instead
// }
// return null;
// }
public static void logFailureCase(String[] args, Throwable t, Object jp) {
System.err.println("failure case: args " + Arrays.asList(args));
}
}
class TargetClass {
static Thread thread;
/** will throw error if exactly one argument */
public static void main (String[] args) {
// make sure to do at least one failure
if (thread == null) {
Runnable r = new Runnable() {
public void run() {
main(new String[] {"throwError" });
}
};
thread = new Thread(r);
thread.start();
}
if (1 == args.length) {
throw new Error("hello");
}
try { thread.join(); }
catch (InterruptedException ie) { }
}
}
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