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Make description of Samplers Locale independent #4887

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merged 3 commits into from Oct 31, 2022
Merged

Make description of Samplers Locale independent #4887

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71756ef
Make description of Samplers Locale independent
lmonkiewicz Oct 26, 2022
2186095
Switch from String.format to concatanation
lmonkiewicz Oct 26, 2022
0a477da
Moved description creation to constructor
lmonkiewicz Oct 27, 2022
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12 changes: 11 additions & 1 deletion ...rc/main/java/io/opentelemetry/sdk/extension/trace/jaeger/sampler/RateLimitingSampler.java
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Expand Up @@ -18,6 +18,8 @@
import io.opentelemetry.sdk.trace.samplers.Sampler;
import io.opentelemetry.sdk.trace.samplers.SamplingDecision;
import io.opentelemetry.sdk.trace.samplers.SamplingResult;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.List;

/**
Expand Down Expand Up @@ -62,11 +64,19 @@ public SamplingResult shouldSample(

@Override
public String getDescription() {
return String.format("RateLimitingSampler{%.2f}", maxTracesPerSecond);
return "RateLimitingSampler{" + decimalFormat(maxTracesPerSecond) + "}";
}

@Override
public String toString() {
return getDescription();
}

private static String decimalFormat(double value) {
DecimalFormatSymbols decimalFormatSymbols = DecimalFormatSymbols.getInstance();
decimalFormatSymbols.setDecimalSeparator('.');

DecimalFormat decimalFormat = new DecimalFormat("0.00", decimalFormatSymbols);
return decimalFormat.format(value);
}
}
9 changes: 8 additions & 1 deletion ...est/java/io/opentelemetry/sdk/extension/trace/jaeger/sampler/RateLimitingSamplerTest.java
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Expand Up @@ -17,6 +17,7 @@
import io.opentelemetry.sdk.trace.samplers.SamplingDecision;
import io.opentelemetry.sdk.trace.samplers.SamplingResult;
import java.util.Collections;
import java.util.Locale;
import org.junit.jupiter.api.Test;

class RateLimitingSamplerTest {
Expand Down Expand Up @@ -62,8 +63,14 @@ void sampleOneTrace() {
}

@Test
void description() {
void descriptionShouldBeLocaleIndependent() {
RateLimitingSampler sampler = new RateLimitingSampler(15);

// PL locale uses ',' as decimal separator
Locale.setDefault(Locale.forLanguageTag("PL"));
assertThat(sampler.getDescription()).isEqualTo("RateLimitingSampler{15.00}");

Locale.setDefault(Locale.ENGLISH);
assertThat(sampler.getDescription()).isEqualTo("RateLimitingSampler{15.00}");
}
}
12 changes: 11 additions & 1 deletion sdk/trace/src/main/java/io/opentelemetry/sdk/trace/samplers/TraceIdRatioBasedSampler.java
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Expand Up @@ -10,6 +10,8 @@
import io.opentelemetry.api.trace.SpanKind;
import io.opentelemetry.context.Context;
import io.opentelemetry.sdk.trace.data.LinkData;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.List;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
Expand Down Expand Up @@ -52,7 +54,7 @@ static TraceIdRatioBasedSampler create(double ratio) {

TraceIdRatioBasedSampler(double ratio, long idUpperBound) {
this.idUpperBound = idUpperBound;
description = String.format("TraceIdRatioBased{%.6f}", ratio);
description = "TraceIdRatioBased{" + decimalFormat(ratio) + "}";
}

@Override
Expand Down Expand Up @@ -108,4 +110,12 @@ long getIdUpperBound() {
private static long getTraceIdRandomPart(String traceId) {
return OtelEncodingUtils.longFromBase16String(traceId, 16);
}

private static String decimalFormat(double value) {
DecimalFormatSymbols decimalFormatSymbols = DecimalFormatSymbols.getInstance();
decimalFormatSymbols.setDecimalSeparator('.');

DecimalFormat decimalFormat = new DecimalFormat("0.000000", decimalFormatSymbols);
return decimalFormat.format(value);
}
}
13 changes: 10 additions & 3 deletions ...trace/src/test/java/io/opentelemetry/sdk/trace/samplers/TraceIdRatioBasedSamplerTest.java
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Expand Up @@ -19,6 +19,7 @@
import io.opentelemetry.sdk.trace.data.LinkData;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import org.junit.jupiter.api.Test;

class TraceIdRatioBasedSamplerTest {
Expand Down Expand Up @@ -67,9 +68,15 @@ void outOfRangeLowProbability() {
}

@Test
void getDescription() {
assertThat(Sampler.traceIdRatioBased(0.5).getDescription())
.isEqualTo(String.format("TraceIdRatioBased{%.6f}", 0.5));
void descriptionShouldBeLocaleIndependent() {
Sampler sampler = Sampler.traceIdRatioBased(0.5);

// PL locale uses ',' as decimal separator
Locale.setDefault(Locale.forLanguageTag("PL"));
assertThat(sampler.getDescription()).isEqualTo("TraceIdRatioBased{0.500000}");

Locale.setDefault(Locale.ENGLISH);
assertThat(sampler.getDescription()).isEqualTo("TraceIdRatioBased{0.500000}");
}

@Test
Expand Down