MetricBuilder.java 文件源码

public synchronized GoCounter buildCounter() {
    String name = generateName("counter");
    GoCounter counter = getExistingCounter(name);
    if (counter == null) {
        counter = new GoCounter(name);
        Map<String, Metric> map = new HashMap<>();
        map.put(name, counter);
        MetricSet set = () -> map;
        registry.registerAll(set);
    }
    return counter;
}