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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.dockerapi.metrics;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.inject.Inject;
import com.yahoo.metrics.simple.MetricReceiver;
import com.yahoo.metrics.simple.Point;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.stream.Collectors;
/**
* Export metrics to both /state/v1/metrics and makes them available programatically.
*
* @author valerijf
*/
public class MetricReceiverWrapper implements Iterable<MetricReceiverWrapper.DimensionMetrics> {
private final static ObjectMapper objectMapper = new ObjectMapper();
private final Object monitor = new Object();
private final Map<Dimensions, Map<String, MetricValue>> metricsByDimensions = new HashMap<>();
private final MetricReceiver metricReceiver;
@Inject
public MetricReceiverWrapper(MetricReceiver metricReceiver) {
this.metricReceiver = metricReceiver;
}
/**
* Declaring the same dimensions and name results in the same CounterWrapper instance (idempotent).
*/
public CounterWrapper declareCounter(Dimensions dimensions, String name) {
synchronized (monitor) {
if (!metricsByDimensions.containsKey(dimensions)) metricsByDimensions.put(dimensions, new HashMap<>());
if (!metricsByDimensions.get(dimensions).containsKey(name)) {
CounterWrapper counter = new CounterWrapper(metricReceiver.declareCounter(name, new Point(dimensions.dimensionsMap)));
metricsByDimensions.get(dimensions).put(name, counter);
}
return (CounterWrapper) metricsByDimensions.get(dimensions).get(name);
}
}
/**
* Declaring the same dimensions and name results in the same GaugeWrapper instance (idempotent).
*/
public GaugeWrapper declareGauge(Dimensions dimensions, String name) {
synchronized (monitor) {
if (!metricsByDimensions.containsKey(dimensions))
metricsByDimensions.put(dimensions, new HashMap<>());
if (!metricsByDimensions.get(dimensions).containsKey(name)) {
GaugeWrapper gauge = new GaugeWrapper(metricReceiver.declareGauge(name, new Point(dimensions.dimensionsMap)));
metricsByDimensions.get(dimensions).put(name, gauge);
}
return (GaugeWrapper) metricsByDimensions.get(dimensions).get(name);
}
}
public void unsetMetricsForContainer(String hostname) {
synchronized (monitor) {
Iterator<Dimensions> dimensionsIterator = metricsByDimensions.keySet().iterator();
while (dimensionsIterator.hasNext()) {
Dimensions dimension = dimensionsIterator.next();
if (dimension.dimensionsMap.containsKey("host") && dimension.dimensionsMap.get("host").equals(hostname)) {
dimensionsIterator.remove();
}
}
}
}
@Override
public Iterator<DimensionMetrics> iterator() {
synchronized (monitor) {
return metricsByDimensions.entrySet().stream().map(entry ->
new DimensionMetrics(entry.getKey(), entry.getValue())).iterator();
}
}
// For testing
Map<String, Number> getMetricsForDimension(Dimensions dimensions) {
synchronized (monitor) {
return metricsByDimensions.get(dimensions).entrySet().stream().collect(
Collectors.toMap(Map.Entry::getKey, entry -> entry.getValue().getValue()));
}
}
public class DimensionMetrics {
private final Dimensions dimensions;
private final Map<String, Object> metrics;
DimensionMetrics(Dimensions dimensions, Map<String, MetricValue> metricValues) {
this.dimensions = dimensions;
this.metrics = metricValues.entrySet().stream().collect(
Collectors.toMap(Map.Entry::getKey, entry -> entry.getValue().getValue()));
}
public String toSecretAgentReport() throws JsonProcessingException {
final Map<String, Object> routing = new HashMap<>();
final Map<String, Object> routingYamas = new HashMap<>();
routing.put("yamas", routingYamas);
routingYamas.put("namespaces", new String[]{"Vespa"});
Map<String, Object> report = new LinkedHashMap<>();
report.put("application", "docker");
report.put("timestamp", System.currentTimeMillis() / 1000);
report.put("dimensions", dimensions.dimensionsMap);
report.put("metrics", metrics);
report.put("routing", routing);
return objectMapper.writeValueAsString(report);
}
}
}
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