Examples with Gauge io.micrometer.core.instrument.Gauge used on opensource projects

Example 1 with Gauge

use of io.micrometer.core.instrument.Gauge in project vertx-micrometer-metrics by vert-x3.

the class GaugesTest method shouldAliasGaugeLabel.

@Test
public void shouldAliasGaugeLabel() {
    MeterRegistry registry = new SimpleMeterRegistry();
    BackendRegistries.registerMatchers(registry, Collections.singletonList(new Match().setLabel("address").setType(MatchType.REGEX).setValue("addr1").setAlias("1")));
    Gauges<LongAdder> gauges = new Gauges<>("my_gauge", "", LongAdder::new, LongAdder::doubleValue, registry, Label.ADDRESS);
    gauges.get("addr1").increment();
    gauges.get("addr1").increment();
    gauges.get("addr2").increment();
    Gauge g = registry.find("my_gauge").tags("address", "1").gauge();
    assertThat(g.value()).isEqualTo(2d);
    g = registry.find("my_gauge").tags("address", "addr1").gauge();
    assertThat(g).isNull();
    g = registry.find("my_gauge").tags("address", "addr2").gauge();
    assertThat(g.value()).isEqualTo(1d);
}

Example 2 with Gauge

use of io.micrometer.core.instrument.Gauge in project micrometer by micrometer-metrics.

the class SimpleMeterRegistryTest method slasOnlyNoPercentileHistogram.

@Issue("#370")
@Test
void slasOnlyNoPercentileHistogram() {
    DistributionSummary summary = DistributionSummary.builder("my.summary").sla(1, 2).register(registry);
    summary.record(1);
    Timer timer = Timer.builder("my.timer").sla(Duration.ofMillis(1)).register(registry);
    timer.record(1, TimeUnit.MILLISECONDS);
    Gauge summaryHist1 = registry.get("my.summary.histogram").tags("le", "1").gauge();
    Gauge summaryHist2 = registry.get("my.summary.histogram").tags("le", "2").gauge();
    Gauge timerHist = registry.get("my.timer.histogram").tags("le", "0.001").gauge();
    assertThat(summaryHist1.value()).isEqualTo(1);
    assertThat(summaryHist2.value()).isEqualTo(1);
    assertThat(timerHist.value()).isEqualTo(1);
    clock.add(SimpleConfig.DEFAULT.step());
    assertThat(summaryHist1.value()).isEqualTo(0);
    assertThat(summaryHist2.value()).isEqualTo(0);
    assertThat(timerHist.value()).isEqualTo(0);
}

Example 3 with Gauge

use of io.micrometer.core.instrument.Gauge in project micrometer by micrometer-metrics.

the class ElasticMeterRegistryTest method nullGauge.

@Issue("#497")
@Test
void nullGauge() {
    Gauge g = Gauge.builder("gauge", null, o -> 1).register(registry);
    assertThat(registry.writeGauge(g, 0)).isEmpty();
    TimeGauge tg = TimeGauge.builder("time.gauge", null, TimeUnit.MILLISECONDS, o -> 1).register(registry);
    assertThat(registry.writeGauge(tg, 0)).isEmpty();
}

Example 4 with Gauge

use of io.micrometer.core.instrument.Gauge in project micrometer by micrometer-metrics.

the class GaugeTest method collectionSizeGauge.

@Test
@DisplayName("gauges can be directly associated with collection size")
default void collectionSizeGauge(MeterRegistry registry) {
    List<String> list = registry.gaugeCollectionSize("my.gauge", emptyList(), new ArrayList<>());
    list.addAll(Arrays.asList("a", "b"));
    Gauge g = registry.get("my.gauge").gauge();
    assertThat(g.value()).isEqualTo(2);
}

Example 5 with Gauge

use of io.micrometer.core.instrument.Gauge in project micrometer by micrometer-metrics.

the class GaugeTest method objectGauge.

@Test
@DisplayName("gauges attached to an object are updated when their values are observed")
default void objectGauge(MeterRegistry registry) {
    List<String> list = registry.gauge("my.gauge", emptyList(), new ArrayList<>(), List::size);
    list.addAll(Arrays.asList("a", "b"));
    Gauge g = registry.get("my.gauge").gauge();
    assertThat(g.value()).isEqualTo(2);
}