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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.clustercontroller.core.hostinfo;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
/**
* Keeper for Metrics for HostInfo.
*
* @author Haakon Dybdahl
*/
public class Metrics {
public Optional<Value> getValue(String name) {
for (Metric metric : metricsList) {
if (name.equals(metric.getName())) {
return Optional.ofNullable(metric.getValue());
}
}
return Optional.empty();
}
/**
* Get the metric value whose dimensions MUST MATCH the given dimensions map.
* To require the metric to NOT have a dimension key, set it's value to null.
*/
public Optional<Value> getValueAt(String name, Map<String, String> dimensions) {
return metricsList.stream()
.filter(metric -> metric.name.equals(name))
.filter(metric -> dimensions.entrySet().stream()
.allMatch(entry -> {
String dimensionName = entry.getKey();
Optional<String> requiredDimensionValue = Optional.ofNullable(entry.getValue());
return metric.getDimensionValue(dimensionName).equals(requiredDimensionValue);
}))
.map(Metric::getValue)
.findFirst();
}
public List<Metric> getMetrics() { return Collections.unmodifiableList(metricsList); }
public static class Metric {
private final String name;
private final Value value;
private final Map<String, String> dimensions;
public Metric(
@JsonProperty("name") String name,
@JsonProperty("values") Value value,
@JsonProperty("dimensions") Map<String, String> dimensions) {
this.name = name;
this.value = value;
this.dimensions = dimensions;
}
public String getName() { return name; }
public Value getValue() { return value; }
public Optional<String> getDimensionValue(String dimension) {
return Optional.ofNullable(dimensions.get(dimension));
}
}
public static class Value {
private final Long last;
public Value(
@JsonProperty("average") Double average,
@JsonProperty("count") Long count,
@JsonProperty("rate") Double rate,
@JsonProperty("min") Long min,
@JsonProperty("max") Long max,
@JsonProperty("last") Long last) {
this.last = last;
}
public Long getLast() { return last; }
}
// We initialize it in case the metrics is missing in the JSON.
@JsonProperty("values")
private ArrayList<Metric> metricsList = new ArrayList<>();
}
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