Cara menambah data meter ke titik akhir metrik Spring Boot Actuator

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- for Prometheus endpoint -->
<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
</dependency>

management.endpoints.web.exposure.include=prometheus,metrics

@Component
public class MyMetrics implements MeterBinder {

    private final Random random = new Random();
    private final AtomicInteger counter = new AtomicInteger();

    @Override
    public void bindTo(MeterRegistry registry) {
        // can any value
        Gauge.builder("mymetrics.gauge", this, MyMetrics::getRandom)
                .description("MyMetrics gauge")
                .register(registry);

        // must the same or greater than the value last got, or reset to zero on restart
        FunctionCounter.builder("mymetrics.counter", this, MyMetrics::counterGetAndIncrement)
                .description("MyMetrics counter")
                .register(registry);
    }

    public double getRandom() {
        return random.nextDouble();
    }

    public int counterGetAndIncrement() {
        return counter.getAndIncrement();
    }

}

{"name":"mymetrics.counter","description":"MyMetrics counter","baseUnit":null,"measurements":[{"statistic":"COUNT","value":9.0}],"availableTags":[]}

{"name":"mymetrics.gauge","description":"MyMetrics gauge","baseUnit":null,"measurements":[{"statistic":"VALUE","value":0.7618330619753056}],"availableTags":[]}

# HELP mymetrics_counter_total MyMetrics counter
# TYPE mymetrics_counter_total counter
mymetrics_counter_total 8.0
# HELP mymetrics_gauge MyMetrics gauge
# TYPE mymetrics_gauge gauge
mymetrics_gauge 0.1346348968727723