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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.integration;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.jdisc.Metric;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;
/**
* @author mortent
*/
public class MetricsMock implements Metric {
private final LinkedHashMap<Context, Map<String, Number>> metrics = new LinkedHashMap<>();
@Override
public void set(String key, Number val, Context ctx) {
metrics.putIfAbsent(ctx, new HashMap<>());
Map<String, Number> metricsMap = metrics.get(ctx);
metricsMap.put(key, val);
}
@Override
public void add(String key, Number val, Context ctx) {
Map<String, Number> metricsMap = metrics.getOrDefault(ctx, new HashMap<>());
metricsMap.compute(key, (k, v) -> v == null ? val : sum(v, val));
}
private Number sum(Number n1, Number n2) {
return n1.doubleValue() + n2.doubleValue();
}
@Override
@SuppressWarnings("unchecked")
public Context createContext(Map<String, ?> properties) {
Context ctx = new MapContext((Map<String, String>) properties);
metrics.putIfAbsent(ctx, new HashMap<>());
return ctx;
}
/** Returns a zero-context metric by name, or null if it is not present */
public Number getMetric(String name) {
Map<String, Number> valuesForEmptyContext = metrics.get(createContext(Collections.emptyMap()));
if (valuesForEmptyContext == null) return null;
return valuesForEmptyContext.get(name);
}
/** Returns metric and context for any metric matching the given dimension predicate */
public Map<MapContext, Map<String, Number>> getMetrics(Predicate<Map<String, String>> dimensionMatcher) {
return metrics.entrySet()
.stream()
.filter(context -> dimensionMatcher.test(((MapContext) context.getKey()).getDimensions()))
.collect(Collectors.toMap(kv -> (MapContext) kv.getKey(),
Map.Entry::getValue,
(v1, v2) -> { throw new IllegalStateException("Duplicate keys for values '" + v1 + "' and '" + v2 + "'."); },
LinkedHashMap::new));
}
/** Returns the most recently added metric matching given dimension and name */
public Optional<Number> getMetric(Predicate<Map<String, String>> dimensionMatcher, String name) {
var metrics = List.copyOf(getMetrics(dimensionMatcher).values());
for (int i = metrics.size() - 1; i >= 0; i--) {
var metric = metrics.get(i).get(name);
if (metric != null) return Optional.of(metric);
}
return Optional.empty();
}
/** Returns the most recently added metric for given instance */
public Optional<Number> getMetric(ApplicationId instance, String name) {
return getMetric(d -> instance.toFullString().equals(d.get("applicationId")), name);
}
public static class MapContext implements Context {
private final Map<String, String> dimensions;
public MapContext(Map<String, String> dimensions) {
this.dimensions = dimensions;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
MapContext that = (MapContext) o;
return dimensions.equals(that.dimensions);
}
@Override
public int hashCode() {
return Objects.hash(dimensions);
}
public Map<String, String> getDimensions() {
return dimensions;
}
}
}
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