Export SamplingPriority method on spanContext.

ddtrace/tracer/span.go

@@ -592,7 +592,7 @@ func obfuscatedResource(o *obfuscate.Obfuscator, typ, resource string) string {
 // shouldKeep reports whether the trace should be kept.
 // a single span being kept implies the whole trace being kept.
 func shouldKeep(s *span) bool {
-	if p, ok := s.context.samplingPriority(); ok && p > 0 {
+	if p, ok := s.context.SamplingPriority(); ok && p > 0 {
 		// positive sampling priorities stay
 		return true
 	}

ddtrace/tracer/spancontext.go

@@ -188,7 +188,7 @@ func (c *spanContext) setSamplingPriority(p int, sampler samplernames.SamplerNam
 	c.trace.setSamplingPriority(p, sampler)
 }
 
-func (c *spanContext) samplingPriority() (p int, ok bool) {
+func (c *spanContext) SamplingPriority() (p int, ok bool) {
 	if c.trace == nil {
 		return 0, false
 	}

ddtrace/tracer/sqlcomment.go

@@ -87,7 +87,7 @@ func (c *SQLCommentCarrier) Inject(spanCtx ddtrace.SpanContext) error {
 			traceID uint64
 		)
 		if ctx, ok := spanCtx.(*spanContext); ok {
-			if sp, ok := ctx.samplingPriority(); ok && sp > 0 {
+			if sp, ok := ctx.SamplingPriority(); ok && sp > 0 {
 				sampled = 1
 			}
 			traceID = ctx.TraceID()

ddtrace/tracer/sqlcomment_test.go

@@ -133,7 +133,7 @@ func TestSQLCommentCarrier(t *testing.T) {
 				assert.Equal(t, carrier.SpanID, xctx.spanID)
 				assert.Equal(t, traceID, xctx.traceID.Lower())
 
-				p, ok := xctx.samplingPriority()
+				p, ok := xctx.SamplingPriority()
 				assert.True(t, ok)
 				assert.Equal(t, tc.samplingPriority, p)
 			}
@@ -166,7 +166,7 @@ func TestExtractOpenTelemetryTraceInformation(t *testing.T) {
 	assert.Equal(t, lower, xctx.traceID.Lower())
 	assert.Equal(t, upper, xctx.traceID.Upper())
 
-	p, ok := xctx.samplingPriority()
+	p, ok := xctx.SamplingPriority()
 	assert.True(t, ok)
 	assert.Equal(t, priority, p)
 }
@@ -244,7 +244,7 @@ func FuzzSpanContextFromTraceComment(f *testing.F) {
 				wanted: %d`, xctx.traceID.Upper(), traceIDUpper)
 		}
 
-		p, ok := xctx.samplingPriority()
+		p, ok := xctx.SamplingPriority()
 		if !ok {
 			t.Fatalf("Error retrieving sampling priority")
 		}

ddtrace/tracer/textmap.go

@@ -310,7 +310,7 @@ func (p *propagator) injectTextMap(spanCtx ddtrace.SpanContext, writer TextMapWr
 	}
 	writer.Set(p.cfg.TraceHeader, strconv.FormatUint(ctx.traceID.Lower(), 10))
 	writer.Set(p.cfg.ParentHeader, strconv.FormatUint(ctx.spanID, 10))
-	if sp, ok := ctx.samplingPriority(); ok {
+	if sp, ok := ctx.SamplingPriority(); ok {
 		writer.Set(p.cfg.PriorityHeader, strconv.Itoa(sp))
 	}
 	if ctx.origin != "" {
@@ -502,7 +502,7 @@ func (*propagatorB3) injectTextMap(spanCtx ddtrace.SpanContext, writer TextMapWr
 		writer.Set(b3TraceIDHeader, w3Cctx.TraceID128())
 	}
 	writer.Set(b3SpanIDHeader, fmt.Sprintf("%016x", ctx.spanID))
-	if p, ok := ctx.samplingPriority(); ok {
+	if p, ok := ctx.SamplingPriority(); ok {
 		if p >= ext.PriorityAutoKeep {
 			writer.Set(b3SampledHeader, "1")
 		} else {
@@ -585,7 +585,7 @@ func (*propagatorB3SingleHeader) injectTextMap(spanCtx ddtrace.SpanContext, writ
 		traceID = w3Cctx.TraceID128()
 	}
 	sb.WriteString(fmt.Sprintf("%s-%016x", traceID, ctx.spanID))
-	if p, ok := ctx.samplingPriority(); ok {
+	if p, ok := ctx.SamplingPriority(); ok {
 		if p >= ext.PriorityAutoKeep {
 			sb.WriteString("-1")
 		} else {
@@ -681,7 +681,7 @@ func (*propagatorW3c) injectTextMap(spanCtx ddtrace.SpanContext, writer TextMapW
 		return ErrInvalidSpanContext
 	}
 	flags := ""
-	p, ok := ctx.samplingPriority()
+	p, ok := ctx.SamplingPriority()
 	if ok && p >= ext.PriorityAutoKeep {
 		flags = "01"
 	} else {
@@ -982,7 +982,7 @@ func parseTracestate(ctx *spanContext, header string) {
 				// The sampling priority and decision maker values are set based on
 				// the specification in the internal W3C context propagation RFC.
 				// See the document for more details.
-				parentP, _ := ctx.samplingPriority()
+				parentP, _ := ctx.SamplingPriority()
 				if (parentP == 1 && stateP > 0) || (parentP == 0 && stateP <= 0) {
 					// As extracted from tracestate
 					ctx.setSamplingPriority(stateP, samplernames.Unknown)

ddtrace/tracer/textmap_test.go

@@ -837,7 +837,7 @@ func TestEnvVars(t *testing.T) {
 					// assert.Equal(test.traceID128Full, id128FromSpan(assert, ctx))  // add when 128-bit trace id support is enabled
 					assert.Equal(tc.out[0], sctx.traceID.Lower())
 					assert.Equal(tc.out[1], sctx.spanID)
-					p, ok := sctx.samplingPriority()
+					p, ok := sctx.SamplingPriority()
 					assert.True(ok)
 					assert.Equal(int(tc.out[2]), p)
 				})
@@ -1108,7 +1108,7 @@ func TestEnvVars(t *testing.T) {
 					assert.Equal(tc.tid, sctx.traceID)
 					assert.Equal(tc.out[0], sctx.spanID)
 					assert.Equal(tc.origin, sctx.origin)
-					p, ok := sctx.samplingPriority()
+					p, ok := sctx.SamplingPriority()
 					assert.True(ok)
 					assert.Equal(int(tc.out[1]), p)
 
@@ -1217,7 +1217,7 @@ func TestEnvVars(t *testing.T) {
 
 					assert.Equal(tc.tid, sctx.traceID)
 					assert.Equal(tc.sid, sctx.spanID)
-					p, ok := sctx.samplingPriority()
+					p, ok := sctx.SamplingPriority()
 					assert.True(ok)
 					assert.Equal(tc.priority, p)
 
@@ -1703,7 +1703,7 @@ func TestEnvVars(t *testing.T) {
 
 					assert.Equal(tc.tid, sctx.traceID)
 					assert.Equal(tc.out[0], sctx.spanID)
-					p, ok := sctx.samplingPriority()
+					p, ok := sctx.SamplingPriority()
 					assert.True(ok)
 					assert.Equal(int(tc.out[1]), p)
 				})
@@ -2032,7 +2032,7 @@ func FuzzParseTraceparent(f *testing.F) {
 		if parseTraceparent(ctx, header) != nil {
 			t.Skipf("Error parsing parent")
 		}
-		parsedSamplingPriority, ok := ctx.samplingPriority()
+		parsedSamplingPriority, ok := ctx.SamplingPriority()
 		if !ok {
 			t.Skipf("Error retrieving sampling priority")
 		}

ddtrace/tracer/tracer.go

@@ -394,7 +394,7 @@ type chunk struct {
 // sampleChunk applies single-span sampling to the provided trace.
 func (t *tracer) sampleChunk(c *chunk) {
 	if len(c.spans) > 0 {
-		if p, ok := c.spans[0].context.samplingPriority(); ok && p > 0 {
+		if p, ok := c.spans[0].context.SamplingPriority(); ok && p > 0 {
 			// The trace is kept, no need to run single span sampling rules.
 			return
 		}
@@ -497,7 +497,7 @@ func (t *tracer) StartSpan(operationName string, options ...ddtrace.StartSpanOpt
 		// this is a child span
 		span.TraceID = context.traceID.Lower()
 		span.ParentID = context.spanID
-		if p, ok := context.samplingPriority(); ok {
+		if p, ok := context.SamplingPriority(); ok {
 			span.setMetric(keySamplingPriority, float64(p))
 		}
 		if context.span != nil {
@@ -548,7 +548,7 @@ func (t *tracer) StartSpan(operationName string, options ...ddtrace.StartSpanOpt
 	if t.config.env != "" {
 		span.setMeta(ext.Environment, t.config.env)
 	}
-	if _, ok := span.context.samplingPriority(); !ok {
+	if _, ok := span.context.SamplingPriority(); !ok {
 		// if not already sampled or a brand new trace, sample it
 		t.sample(span)
 	}
@@ -656,7 +656,7 @@ const sampleRateMetricKey = "_sample_rate"
 
 // Sample samples a span with the internal sampler.
 func (t *tracer) sample(span *span) {
-	if _, ok := span.context.samplingPriority(); ok {
+	if _, ok := span.context.SamplingPriority(); ok {
 		// sampling decision was already made
 		return
 	}

ddtrace/tracer/tracer_test.go

@@ -414,7 +414,7 @@ func TestSamplingDecision(t *testing.T) {
 		span := tracer.StartSpan("name_1").(*span)
 		child := tracer.StartSpan("name_2", ChildOf(span.context))
 		child.SetTag(ext.EventSampleRate, 1)
-		p, ok := span.context.samplingPriority()
+		p, ok := span.context.SamplingPriority()
 		require.True(t, ok)
 		assert.Equal(t, ext.PriorityAutoReject, p)
 		child.Finish()
@@ -1143,7 +1143,7 @@ func TestTracerPrioritySampler(t *testing.T) {
 	assert.Equal(1., s.Metrics[keySamplingPriorityRate])
 	assert.Equal(1., s.Metrics[keySamplingPriority])
 	assert.Equal("-1", s.context.trace.propagatingTags[keyDecisionMaker])
-	p, ok := s.context.samplingPriority()
+	p, ok := s.context.SamplingPriority()
 	assert.True(ok)
 	assert.EqualValues(p, s.Metrics[keySamplingPriority])
 	s.Finish()
@@ -1185,7 +1185,7 @@ func TestTracerPrioritySampler(t *testing.T) {
 		}
 		assert.True(ok)
 		assert.Contains([]float64{0, 1}, prio)
-		p, ok := s.context.samplingPriority()
+		p, ok := s.context.SamplingPriority()
 		assert.True(ok)
 		assert.EqualValues(p, prio)