MetricBuilder.java 文件源码

public synchronized GoGauge buildGauge() {
    String name = generateName("gauge");
    GoGauge gauge = getExistingGauge(name);
    if (gauge == null) {
        gauge = new GoGauge(name);
        Map<String, Metric> map = new HashMap<>();
        map.put(name, gauge);
        MetricSet set = () -> map;
        registry.registerAll(set);
    }
    return gauge;
}