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Use ThreadLocalRandom for improved concurrency.

This commit is contained in:
Tyler Benson 2019-09-10 14:04:37 -07:00
parent a88182ab3b
commit 8cd294dba0
1 changed files with 2 additions and 1 deletions
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3
dd-trace-ot/src/main/java/datadog/trace/common/sampling/RateByServiceSampler.java
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@ -8,6 +8,7 @@ import java.util.Collections;
import java.util.HashMap; import java.util.HashMap;
import java.util.Iterator; import java.util.Iterator;
import java.util.Map; import java.util.Map;
import java.util.concurrent.ThreadLocalRandom;
import lombok.extern.slf4j.Slf4j; import lombok.extern.slf4j.Slf4j;
/** /**
@ -122,7 +123,7 @@ public class RateByServiceSampler implements Sampler, ResponseListener {
@Override @Override
public boolean doSample(final DDSpan span) { public boolean doSample(final DDSpan span) {
final boolean sample = Math.random() <= sampleRate; final boolean sample = ThreadLocalRandom.current().nextFloat() <= sampleRate;
log.debug("{} - Span is sampled: {}", span, sample); log.debug("{} - Span is sampled: {}", span, sample);
return sample; return sample;
} }