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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.container.metrics;
import org.junit.jupiter.api.Test;
import java.util.Map;
import java.util.stream.Collectors;
import static com.yahoo.vespa.hosted.node.admin.container.metrics.Metrics.APPLICATION_HOST;
import static com.yahoo.vespa.hosted.node.admin.container.metrics.Metrics.DimensionType.DEFAULT;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
* @author freva
*/
public class MetricsTest {
private static final Dimensions hostDimension = new Dimensions.Builder().add("host", "abc.yahoo.com").build();
private final Metrics metrics = new Metrics();
@Test
void testDefaultValue() {
metrics.declareCounter("some.name", hostDimension);
assertEquals(getMetricsForDimension(hostDimension).get("some.name"), 0L);
}
@Test
void testSimpleIncrementMetric() {
Counter counter = metrics.declareCounter("a_counter.value", hostDimension);
counter.add(5);
counter.add(8);
Map<String, Number> latestMetrics = getMetricsForDimension(hostDimension);
assertEquals(1, latestMetrics.size(), "Expected only 1 metric value to be set");
assertEquals(latestMetrics.get("a_counter.value"), 13L); // 5 + 8
}
@Test
void testSimpleGauge() {
Gauge gauge = metrics.declareGauge("test.gauge", hostDimension);
gauge.sample(42);
gauge.sample(-342.23);
Map<String, Number> latestMetrics = getMetricsForDimension(hostDimension);
assertEquals(1, latestMetrics.size(), "Expected only 1 metric value to be set");
assertEquals(latestMetrics.get("test.gauge"), -342.23);
}
@Test
void testRedeclaringSameGauge() {
Gauge gauge = metrics.declareGauge("test.gauge", hostDimension);
gauge.sample(42);
// Same as hostDimension, but new instance.
Dimensions newDimension = new Dimensions.Builder().add("host", "abc.yahoo.com").build();
Gauge newGauge = metrics.declareGauge("test.gauge", newDimension);
newGauge.sample(56);
assertEquals(getMetricsForDimension(hostDimension).get("test.gauge"), 56.);
}
@Test
void testSameMetricNameButDifferentDimensions() {
Gauge gauge = metrics.declareGauge("test.gauge", hostDimension);
gauge.sample(42);
// Not the same as hostDimension.
Dimensions newDimension = new Dimensions.Builder().add("host", "abcd.yahoo.com").build();
Gauge newGauge = metrics.declareGauge("test.gauge", newDimension);
newGauge.sample(56);
assertEquals(getMetricsForDimension(hostDimension).get("test.gauge"), 42.);
assertEquals(getMetricsForDimension(newDimension).get("test.gauge"), 56.);
}
@Test
void testDeletingMetric() {
metrics.declareGauge("test.gauge", hostDimension);
Dimensions differentDimension = new Dimensions.Builder().add("host", "abcd.yahoo.com").build();
metrics.declareGauge("test.gauge", differentDimension);
assertEquals(2, metrics.getMetricsByType(DEFAULT).size());
metrics.deleteMetricByDimension(APPLICATION_HOST, differentDimension, DEFAULT);
assertEquals(1, metrics.getMetricsByType(DEFAULT).size());
assertEquals(getMetricsForDimension(hostDimension).size(), 1);
assertEquals(getMetricsForDimension(differentDimension).size(), 0);
}
private Map<String, Number> getMetricsForDimension(Dimensions dimensions) {
return metrics.getOrCreateApplicationMetrics(APPLICATION_HOST, DEFAULT)
.getOrDefault(dimensions, Map.of())
.entrySet()
.stream()
.collect(Collectors.toMap(Map.Entry::getKey, entry -> entry.getValue().getValue()));
}
}
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