Add peer tags, span kind and trace root flag to MetricKey bucket #9178
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package datadog.trace.common.metrics; | ||
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| import static java.util.concurrent.TimeUnit.MICROSECONDS; | ||
| import static java.util.concurrent.TimeUnit.SECONDS; | ||
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| import datadog.communication.ddagent.DDAgentFeaturesDiscovery; | ||
| import datadog.communication.monitor.Monitoring; | ||
| import datadog.trace.api.WellKnownTags; | ||
| import datadog.trace.core.CoreSpan; | ||
| import datadog.trace.core.monitor.HealthMetrics; | ||
| import datadog.trace.util.Strings; | ||
| import java.nio.ByteBuffer; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
| import org.openjdk.jmh.annotations.Benchmark; | ||
| import org.openjdk.jmh.annotations.BenchmarkMode; | ||
| import org.openjdk.jmh.annotations.Fork; | ||
| import org.openjdk.jmh.annotations.Measurement; | ||
| import org.openjdk.jmh.annotations.Mode; | ||
| import org.openjdk.jmh.annotations.OutputTimeUnit; | ||
| import org.openjdk.jmh.annotations.Scope; | ||
| import org.openjdk.jmh.annotations.State; | ||
| import org.openjdk.jmh.annotations.Warmup; | ||
| import org.openjdk.jmh.infra.Blackhole; | ||
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| @State(Scope.Benchmark) | ||
| @Warmup(iterations = 1, time = 30, timeUnit = SECONDS) | ||
| @Measurement(iterations = 3, time = 30, timeUnit = SECONDS) | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(MICROSECONDS) | ||
| @Fork(value = 1) | ||
| public class ConflatingMetricsAggregatorBenchmark { | ||
| private final DDAgentFeaturesDiscovery featuresDiscovery = | ||
| new FixedAgentFeaturesDiscovery( | ||
| Collections.singleton("peer.hostname"), Collections.emptySet()); | ||
| private final ConflatingMetricsAggregator aggregator = | ||
| new ConflatingMetricsAggregator( | ||
| new WellKnownTags("", "", "", "", "", ""), | ||
| Collections.emptySet(), | ||
| featuresDiscovery, | ||
| HealthMetrics.NO_OP, | ||
| new NullSink(), | ||
| 2048, | ||
| 2048); | ||
| private final List<CoreSpan<?>> spans = generateTrace(64); | ||
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| static List<CoreSpan<?>> generateTrace(int len) { | ||
| final List<CoreSpan<?>> trace = new ArrayList<>(); | ||
| for (int i = 0; i < len; i++) { | ||
| SimpleSpan span = new SimpleSpan("", "", "", "", true, true, false, 0, 10, -1); | ||
| span.setTag("peer.hostname", Strings.random(10)); | ||
| trace.add(span); | ||
| } | ||
| return trace; | ||
| } | ||
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| static class NullSink implements Sink { | ||
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| @Override | ||
| public void register(EventListener listener) {} | ||
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| @Override | ||
| public void accept(int messageCount, ByteBuffer buffer) {} | ||
| } | ||
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| static class FixedAgentFeaturesDiscovery extends DDAgentFeaturesDiscovery { | ||
| private final Set<String> peerTags; | ||
| private final Set<String> spanKinds; | ||
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| public FixedAgentFeaturesDiscovery(Set<String> peerTags, Set<String> spanKinds) { | ||
| // create a fixed discovery with metrics enabled | ||
| super(null, Monitoring.DISABLED, null, false, true); | ||
| this.peerTags = peerTags; | ||
| this.spanKinds = spanKinds; | ||
| } | ||
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| @Override | ||
| public void discover() { | ||
| // do nothing | ||
| } | ||
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| @Override | ||
| public boolean supportsMetrics() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public Set<String> peerTags() { | ||
| return peerTags; | ||
| } | ||
| } | ||
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| @Benchmark | ||
| public void benchmark(Blackhole blackhole) { | ||
| blackhole.consume(aggregator.publish(spans)); | ||
| } | ||
| } |
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🎯 suggestion: Can't we make a dedicated type for the cache and creator rather than using a
Pair<DDCache<String, UTF8BytesString>, Function<String, UTF8BytesString>>? It feels hard to read.Because it always end up calling
cache.computeIfAbsent(key, creator), so the wholePair<...>thing can be simplified as a functional interface like:Function<String, UTF8BytesString>.