com.vmlens.annotation

Annotation Type DoNotTrace

@Target(value=METHOD)
 @Retention(value=CLASS)
public @interface DoNotTrace

The com.vmlens.annotation.DoNotTrace annotation lets you define methods that should not be traced by vmlens. This allows you to enforce a specific ordering of your thread without influencing the data race detection of vmlens. In the following example, the CountDownLatch creates a happens-before relation between the i++ in the methods updateBefore and updateAfter:

 public class UpdateWithDoNotTrace {
    private int i = 0;
    final   CountDownLatch countDownLatch = 
        new CountDownLatch(1);  
    @DoNotTrace
    private void signal() {
        countDownLatch.countDown();
    }
    @DoNotTrace
    private void wait4Signal() 
            throws InterruptedException {
        countDownLatch.await();
    }
    public void updateBefore() {
        i++;
        signal();
    }
    public void updateAfter() 
            throws InterruptedException {
        wait4Signal();
        i++;
    }
}