feat: use autoprop

Author: hacdias

examples/gateway/common/tracing.go

@@ -4,13 +4,13 @@ import (
 	"net/http"
 
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
-	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/contrib/propagators/autoprop"
 )
 
-var Propagators = propagation.NewCompositeTextMapPropagator(
-	propagation.TraceContext{},
-	propagation.Baggage{},
-)
+// Propagators uses autprop.NewTextMapPropagator, which automatically sets
+// the correct propagators from OTEL_PROPAGATORS according to the spec. By default,
+// Trace Context and Baggage are used.
+var Propagators = autoprop.NewTextMapPropagator()
 
 var DefaultClient = &http.Client{
 	Transport: otelhttp.NewTransport(

examples/go.mod

@@ -16,6 +16,7 @@ require (
 	github.com/prometheus/client_golang v1.14.0
 	github.com/stretchr/testify v1.8.2
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.40.0
+	go.opentelemetry.io/contrib/propagators/autoprop v0.40.0
 	go.opentelemetry.io/otel v1.14.0
 	go.opentelemetry.io/otel/sdk v1.14.0
 )
@@ -129,6 +130,10 @@ require (
 	github.com/whyrusleeping/chunker v0.0.0-20181014151217-fe64bd25879f // indirect
 	github.com/whyrusleeping/go-keyspace v0.0.0-20160322163242-5b898ac5add1 // indirect
 	go.opencensus.io v0.24.0 // indirect
+	go.opentelemetry.io/contrib/propagators/aws v1.15.0 // indirect
+	go.opentelemetry.io/contrib/propagators/b3 v1.15.0 // indirect
+	go.opentelemetry.io/contrib/propagators/jaeger v1.15.0 // indirect
+	go.opentelemetry.io/contrib/propagators/ot v1.15.0 // indirect
 	go.opentelemetry.io/otel/metric v0.37.0 // indirect
 	go.opentelemetry.io/otel/trace v1.14.0 // indirect
 	go.uber.org/atomic v1.10.0 // indirect

examples/go.sum

@@ -648,6 +648,16 @@ go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.40.0 h1:lE9EJyw3/JhrjWH/hEy9FptnalDQgj7vpbgC2KCCCxE=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.40.0/go.mod h1:pcQ3MM3SWvrA71U4GDqv9UFDJ3HQsW7y5ZO3tDTlUdI=
+go.opentelemetry.io/contrib/propagators/autoprop v0.40.0 h1:Lj33jj7eIrBfIShiK8NU91u2BglKnUS1UUxVemuQJtw=
+go.opentelemetry.io/contrib/propagators/autoprop v0.40.0/go.mod h1:6QO816FeZ+6zahs6hYqbUCCsnNBm7o+t4iwVySpzcdI=
+go.opentelemetry.io/contrib/propagators/aws v1.15.0 h1:FLe+bRTMAhEALItDQt1U2S/rdq8/rGGJTJpOpCDvMu0=
+go.opentelemetry.io/contrib/propagators/aws v1.15.0/go.mod h1:Z/nqdjqKjErrS3gYoEMZt8//dt8VZbqalD0V+7vh7lM=
+go.opentelemetry.io/contrib/propagators/b3 v1.15.0 h1:bMaonPyFcAvZ4EVzkUNkfnUHP5Zi63CIDlA3dRsEg8Q=
+go.opentelemetry.io/contrib/propagators/b3 v1.15.0/go.mod h1:VjU0g2v6HSQ+NwfifambSLAeBgevjIcqmceaKWEzl0c=
+go.opentelemetry.io/contrib/propagators/jaeger v1.15.0 h1:xdJjwy5t/8I+TZehMMQ+r2h50HREihH2oMUhimQ+jug=
+go.opentelemetry.io/contrib/propagators/jaeger v1.15.0/go.mod h1:tU0nwW4QTvKceNUP60/PQm0FI8zDSwey7gIFt3RR/yw=
+go.opentelemetry.io/contrib/propagators/ot v1.15.0 h1:iBNejawWy7wWZ5msuZDNcMjBy14Wc0v3gCAXukGHN/Q=
+go.opentelemetry.io/contrib/propagators/ot v1.15.0/go.mod h1:0P7QQ+MHt6SXR1ATaMpewSiWlp8NbKErNLKcaU4EEKI=
 go.opentelemetry.io/otel v1.14.0 h1:/79Huy8wbf5DnIPhemGB+zEPVwnN6fuQybr/SRXa6hM=
 go.opentelemetry.io/otel v1.14.0/go.mod h1:o4buv+dJzx8rohcUeRmWUZhqupFvzWis188WlggnNeU=
 go.opentelemetry.io/otel/metric v0.37.0 h1:pHDQuLQOZwYD+Km0eb657A25NaRzy0a+eLyKfDXedEs=