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Demo.java
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/
Demo.java
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package io.micrometer.core.samples;
import io.micrometer.core.instrument.Tags;
import io.micrometer.core.instrument.Timer;
import io.micrometer.prometheus.PrometheusConfig;
import io.micrometer.prometheus.PrometheusMeterRegistry;
import java.time.Duration;
import java.util.function.Function;
public class Demo {
private static final PrometheusMeterRegistry registry = new PrometheusMeterRegistry(PrometheusConfig.DEFAULT);
private static final Function<Tags, Timer> timerFactory = Timer.builder("cache.initialization.latency")
.description("Time initialize cache from database")
.tag("static", "abc")
.publishPercentiles(0.99, 0.999)
.publishPercentileHistogram()
.minimumExpectedValue(Duration.ofSeconds(10))
.maximumExpectedValue(Duration.ofSeconds(600))
.with(registry);
public static void main(String[] args) {
doSomething("test");
}
private static void doSomething(String cacheName) {
timerFactory.apply(Tags.of("cacheName", cacheName)).record(Duration.ofMillis(100));
System.out.println(registry.scrape());
}
}