Playing with the StackWatch from Commons Lang

Example.java

package example;

// imports

class Example {

    
    public static void main(String[] args) throws Exception {
        // Travelling to Japan
        StackWatch tripWatch = new StackWatch("TripToJapan");
        // start trip to Japan
        tripWatch.start();
        // then start trip part in Tokyo
        tripWatch.startTiming("Tokyo", "city");
        // go to akihabara
        tripWatch.startTiming("Akihabara", "manga", "robots");
        Thread.sleep(RandomUtils.nextLong(100, 3000));
        tripWatch.stopTiming();
        // go to shinjuku
        tripWatch.startTiming("Shinjuku", "manga", "izakaya");
        Thread.sleep(RandomUtils.nextLong(500, 2000));
        tripWatch.stopTiming();
        // then stop tokyo
        tripWatch.stopTiming();
        // then start trip part in Osaka
        tripWatch.startTiming("Osaka", "city");
        Thread.sleep(RandomUtils.nextLong(200, 6000));
        tripWatch.stopTiming();
        // then start trip part in Kumamoto
        tripWatch.startTiming("Kumamoto", "city");
        Thread.sleep(RandomUtils.nextLong(100, 500));
        tripWatch.stopTiming();
        // then end trip
        tripWatch.stop();
        // now visit printing each node's level and duration
        System.out.println("######## All ########");
        tripWatch.visit(new TimingRecordNodeVisitor() {
            public void visitRecord(int level, TimingRecordNode node) {
                System.out.println("Visit node: " + node.getPath() + " level " + level + " and duration "
                        + node.getStopWatch().getNanoTime());
            }
        });
        System.out.println("######## Cities ########");
        // or use tags and print just the duration of each city
        tripWatch.visit(new TimingRecordNodeVisitor() {
            public void visitRecord(int level, TimingRecordNode node) {
                String[] tags = node.getTags();
                if (tags != null && tags.length > 0) {
                    for (String tag : tags) {
                        if (tag.trim().equalsIgnoreCase("city")) {
                            System.out.println("Visit node: " + node.getPath() + " level " + level + " and duration "
                                    + node.getStopWatch().getNanoTime());
                        }
                    }
                }
            }
        });
    }

}

Outputs:

######## All ########
Visit node: TripToJapan level 0 and duration 4754369797
Visit node: TripToJapan/Tokyo level 1 and duration 2549423016
Visit node: TripToJapan/Tokyo/Akihabara level 2 and duration 1334102112
Visit node: TripToJapan/Tokyo/Shinjuku level 2 and duration 1184098898
Visit node: TripToJapan/Osaka level 1 and duration 1837200357
Visit node: TripToJapan/Kumamoto level 1 and duration 367448407
######## Cities ########
Visit node: TripToJapan/Tokyo level 1 and duration 2549423016
Visit node: TripToJapan/Osaka level 1 and duration 1837200357
Visit node: TripToJapan/Kumamoto level 1 and duration 367448407