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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.jdisc.test;
import com.yahoo.jdisc.Metric;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Metric implementation for tests.
*
* @author jonmv
*/
public class MockMetric implements Metric {
private final Map<String, Map<Map<String, ?>, Double>> metrics = new ConcurrentHashMap<>();
@Override
public void set(String key, Number val, Context ctx) {
metrics.computeIfAbsent(key, k -> new ConcurrentHashMap<>())
.put(MapContext.emptyIfNull(ctx).dimensions, val.doubleValue());
}
@Override
public void add(String key, Number val, Context ctx) {
metrics.computeIfAbsent(key, k -> new ConcurrentHashMap<>())
.merge(MapContext.emptyIfNull(ctx).dimensions, val.doubleValue(), Double::sum);
}
@Override
public Context createContext(Map<String, ?> properties) {
return properties == null ? MapContext.empty : new MapContext(properties);
}
public Map<String, Map<Map<String, ?>, Double>> metrics() { return metrics; }
@Override
public String toString() {
return "MockMetric{" +
"metrics=" + metrics +
'}';
}
private static class MapContext implements Context {
private static final MapContext empty = new MapContext(Map.of());
private final Map<String, Object> dimensions;
private MapContext(Map<String, ?> dimensions) {
this.dimensions = new HashMap<>(dimensions.size());
this.dimensions.putAll(dimensions);
}
private static MapContext emptyIfNull(Context context) {
return context == null ? empty : (MapContext) context;
}
}
}
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