TUN-5989: Add in-memory otlp exporter

vendor/go.opentelemetry.io/contrib/propagators/Jaeger/context.go

@@ -0,0 +1,41 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import "context"
+
+type jaegerKeyType int
+
+const (
+	debugKey jaegerKeyType = iota
+)
+
+// withDebug returns a copy of parent with debug set as the debug flag value .
+func withDebug(parent context.Context, debug bool) context.Context {
+	return context.WithValue(parent, debugKey, debug)
+}
+
+// debugFromContext returns the debug value stored in ctx.
+//
+// If no debug value is stored in ctx false is returned.
+func debugFromContext(ctx context.Context) bool {
+	if ctx == nil {
+		return false
+	}
+	if debug, ok := ctx.Value(debugKey).(bool); ok {
+		return debug
+	}
+	return false
+}

vendor/go.opentelemetry.io/contrib/propagators/Jaeger/doc.go

@@ -0,0 +1,17 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This package implements the Jaeger propagator specification as defined
+// at https://www.jaegertracing.io/docs/1.18/client-libraries/#propagation-format
+package jaeger // import "go.opentelemetry.io/contrib/propagators/jaeger"

vendor/go.opentelemetry.io/contrib/propagators/Jaeger/jaeger_propagator.go

@@ -0,0 +1,161 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/trace"
+)
+
+const (
+	jaegerHeader        = "uber-trace-id"
+	separator           = ":"
+	traceID64bitsWidth  = 64 / 4
+	traceID128bitsWidth = 128 / 4
+	spanIDWidth         = 64 / 4
+
+	traceIDPadding = "0000000000000000"
+
+	flagsDebug      = 0x02
+	flagsSampled    = 0x01
+	flagsNotSampled = 0x00
+
+	deprecatedParentSpanID = "0"
+)
+
+var (
+	empty = trace.SpanContext{}
+
+	errMalformedTraceContextVal = errors.New("header value of uber-trace-id should contain four different part separated by : ")
+	errInvalidTraceIDLength     = errors.New("invalid trace id length, must be either 16 or 32")
+	errMalformedTraceID         = errors.New("cannot decode trace id from header, should be a string of hex, lowercase trace id can't be all zero")
+	errInvalidSpanIDLength      = errors.New("invalid span id length, must be 16")
+	errMalformedSpanID          = errors.New("cannot decode span id from header, should be a string of hex, lowercase span id can't be all zero")
+	errMalformedFlag            = errors.New("cannot decode flag")
+)
+
+// Jaeger propagator serializes SpanContext to/from Jaeger Headers
+//
+// Jaeger format:
+//
+// uber-trace-id: {trace-id}:{span-id}:{parent-span-id}:{flags}
+type Jaeger struct{}
+
+var _ propagation.TextMapPropagator = &Jaeger{}
+
+// Inject injects a context to the carrier following jaeger format.
+// The parent span ID is set to an dummy parent span id as the most implementations do.
+func (jaeger Jaeger) Inject(ctx context.Context, carrier propagation.TextMapCarrier) {
+	sc := trace.SpanFromContext(ctx).SpanContext()
+	headers := []string{}
+	if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() {
+		return
+	}
+	headers = append(headers, sc.TraceID().String(), sc.SpanID().String(), deprecatedParentSpanID)
+	if debugFromContext(ctx) {
+		headers = append(headers, fmt.Sprintf("%x", flagsDebug|flagsSampled))
+	} else if sc.IsSampled() {
+		headers = append(headers, fmt.Sprintf("%x", flagsSampled))
+	} else {
+		headers = append(headers, fmt.Sprintf("%x", flagsNotSampled))
+	}
+
+	carrier.Set(jaegerHeader, strings.Join(headers, separator))
+}
+
+// Extract extracts a context from the carrier if it contains Jaeger headers.
+func (jaeger Jaeger) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context {
+	// extract tracing information
+	if h := carrier.Get(jaegerHeader); h != "" {
+		ctx, sc, err := extract(ctx, h)
+		if err == nil && sc.IsValid() {
+			return trace.ContextWithRemoteSpanContext(ctx, sc)
+		}
+	}
+
+	return ctx
+}
+
+func extract(ctx context.Context, headerVal string) (context.Context, trace.SpanContext, error) {
+	var (
+		scc = trace.SpanContextConfig{}
+		err error
+	)
+
+	parts := strings.Split(headerVal, separator)
+	if len(parts) != 4 {
+		return ctx, empty, errMalformedTraceContextVal
+	}
+
+	// extract trace ID
+	if parts[0] != "" {
+		id := parts[0]
+		if len(id) != traceID128bitsWidth && len(id) != traceID64bitsWidth {
+			return ctx, empty, errInvalidTraceIDLength
+		}
+		// padding when length is 16
+		if len(id) == traceID64bitsWidth {
+			id = traceIDPadding + id
+		}
+		scc.TraceID, err = trace.TraceIDFromHex(id)
+		if err != nil {
+			return ctx, empty, errMalformedTraceID
+		}
+	}
+
+	// extract span ID
+	if parts[1] != "" {
+		id := parts[1]
+		if len(id) != spanIDWidth {
+			return ctx, empty, errInvalidSpanIDLength
+		}
+		scc.SpanID, err = trace.SpanIDFromHex(id)
+		if err != nil {
+			return ctx, empty, errMalformedSpanID
+		}
+	}
+
+	// skip third part as it is deprecated
+
+	// extract flag
+	if parts[3] != "" {
+		flagStr := parts[3]
+		flag, err := strconv.ParseInt(flagStr, 16, 64)
+		if err != nil {
+			return ctx, empty, errMalformedFlag
+		}
+		if flag&flagsSampled == flagsSampled {
+			// if sample bit is set, we check if debug bit is also set
+			if flag&flagsDebug == flagsDebug {
+				scc.TraceFlags |= trace.FlagsSampled
+				ctx = withDebug(ctx, true)
+			} else {
+				scc.TraceFlags |= trace.FlagsSampled
+			}
+		}
+		// ignore other bit, including firehose since we don't have corresponding flag in trace context.
+	}
+	return ctx, trace.NewSpanContext(scc), nil
+}
+
+func (jaeger Jaeger) Fields() []string {
+	return []string{jaegerHeader}
+}

vendor/go.opentelemetry.io/contrib/propagators/LICENSE

@@ -0,0 +1,201 @@
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