Initial QSfera import

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/LICENSE

@@ -0,0 +1,231 @@
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Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/README.md

@@ -0,0 +1,3 @@
+# OTLP Trace Exporter
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/otlp/otlptrace)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace)

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/clients.go

@@ -0,0 +1,43 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+import (
+	"context"
+
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+)
+
+// Client manages connections to the collector, handles the
+// transformation of data into wire format, and the transmission of that
+// data to the collector.
+type Client interface {
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Start should establish connection(s) to endpoint(s). It is
+	// called just once by the exporter, so the implementation
+	// does not need to worry about idempotence and locking.
+	Start(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// Stop should close the connections. The function is called
+	// only once by the exporter, so the implementation does not
+	// need to worry about idempotence, but it may be called
+	// concurrently with UploadTraces, so proper
+	// locking is required. The function serves as a
+	// synchronization point - after the function returns, the
+	// process of closing connections is assumed to be finished.
+	Stop(ctx context.Context) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+
+	// UploadTraces should transform the passed traces to the wire
+	// format and send it to the collector. May be called
+	// concurrently.
+	UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) error
+	// DO NOT CHANGE: any modification will not be backwards compatible and
+	// must never be done outside of a new major release.
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/doc.go

@@ -0,0 +1,10 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+/*
+Package otlptrace contains abstractions for OTLP span exporters.
+See the official OTLP span exporter implementations:
+  - [go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc],
+  - [go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp].
+*/
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/exporter.go

@@ -0,0 +1,105 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+)
+
+var errAlreadyStarted = errors.New("already started")
+
+// Exporter exports trace data in the OTLP wire format.
+type Exporter struct {
+	client Client
+
+	mu      sync.RWMutex
+	started bool
+
+	startOnce sync.Once
+	stopOnce  sync.Once
+}
+
+// ExportSpans exports a batch of spans.
+func (e *Exporter) ExportSpans(ctx context.Context, ss []tracesdk.ReadOnlySpan) error {
+	protoSpans := tracetransform.Spans(ss)
+	if len(protoSpans) == 0 {
+		return nil
+	}
+
+	err := e.client.UploadTraces(ctx, protoSpans)
+	if err != nil {
+		return fmt.Errorf("traces export: %w", err)
+	}
+	return nil
+}
+
+// Start establishes a connection to the receiving endpoint.
+func (e *Exporter) Start(ctx context.Context) error {
+	err := errAlreadyStarted
+	e.startOnce.Do(func() {
+		e.mu.Lock()
+		e.started = true
+		e.mu.Unlock()
+		err = e.client.Start(ctx)
+	})
+
+	return err
+}
+
+// Shutdown flushes all exports and closes all connections to the receiving endpoint.
+func (e *Exporter) Shutdown(ctx context.Context) error {
+	e.mu.RLock()
+	started := e.started
+	e.mu.RUnlock()
+
+	if !started {
+		return nil
+	}
+
+	var err error
+
+	e.stopOnce.Do(func() {
+		err = e.client.Stop(ctx)
+		e.mu.Lock()
+		e.started = false
+		e.mu.Unlock()
+	})
+
+	return err
+}
+
+var _ tracesdk.SpanExporter = (*Exporter)(nil)
+
+// New constructs a new Exporter and starts it.
+func New(ctx context.Context, client Client) (*Exporter, error) {
+	exp := NewUnstarted(client)
+	if err := exp.Start(ctx); err != nil {
+		return nil, err
+	}
+	return exp, nil
+}
+
+// NewUnstarted constructs a new Exporter and does not start it.
+func NewUnstarted(client Client) *Exporter {
+	return &Exporter{
+		client: client,
+	}
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Exporter.
+func (e *Exporter) MarshalLog() any {
+	return struct {
+		Type   string
+		Client Client
+	}{
+		Type:   "otlptrace",
+		Client: e.client,
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/attribute.go

@@ -0,0 +1,151 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package tracetransform provides conversion functionality for the otlptrace
+// exporters.
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/sdk/resource"
+)
+
+// KeyValues transforms a slice of attribute KeyValues into OTLP key-values.
+func KeyValues(attrs []attribute.KeyValue) []*commonpb.KeyValue {
+	if len(attrs) == 0 {
+		return nil
+	}
+
+	out := make([]*commonpb.KeyValue, 0, len(attrs))
+	for _, kv := range attrs {
+		out = append(out, KeyValue(kv))
+	}
+	return out
+}
+
+// Iterator transforms an attribute iterator into OTLP key-values.
+func Iterator(iter attribute.Iterator) []*commonpb.KeyValue {
+	l := iter.Len()
+	if l == 0 {
+		return nil
+	}
+
+	out := make([]*commonpb.KeyValue, 0, l)
+	for iter.Next() {
+		out = append(out, KeyValue(iter.Attribute()))
+	}
+	return out
+}
+
+// ResourceAttributes transforms a Resource OTLP key-values.
+func ResourceAttributes(res *resource.Resource) []*commonpb.KeyValue {
+	return Iterator(res.Iter())
+}
+
+// KeyValue transforms an attribute KeyValue into an OTLP key-value.
+func KeyValue(kv attribute.KeyValue) *commonpb.KeyValue {
+	return &commonpb.KeyValue{Key: string(kv.Key), Value: Value(kv.Value)}
+}
+
+// Value transforms an attribute Value into an OTLP AnyValue.
+func Value(v attribute.Value) *commonpb.AnyValue {
+	av := new(commonpb.AnyValue)
+	switch v.Type() {
+	case attribute.BOOL:
+		av.Value = &commonpb.AnyValue_BoolValue{
+			BoolValue: v.AsBool(),
+		}
+	case attribute.BOOLSLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: boolSliceValues(v.AsBoolSlice()),
+			},
+		}
+	case attribute.INT64:
+		av.Value = &commonpb.AnyValue_IntValue{
+			IntValue: v.AsInt64(),
+		}
+	case attribute.INT64SLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: int64SliceValues(v.AsInt64Slice()),
+			},
+		}
+	case attribute.FLOAT64:
+		av.Value = &commonpb.AnyValue_DoubleValue{
+			DoubleValue: v.AsFloat64(),
+		}
+	case attribute.FLOAT64SLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: float64SliceValues(v.AsFloat64Slice()),
+			},
+		}
+	case attribute.STRING:
+		av.Value = &commonpb.AnyValue_StringValue{
+			StringValue: v.AsString(),
+		}
+	case attribute.STRINGSLICE:
+		av.Value = &commonpb.AnyValue_ArrayValue{
+			ArrayValue: &commonpb.ArrayValue{
+				Values: stringSliceValues(v.AsStringSlice()),
+			},
+		}
+	case attribute.EMPTY:
+	default:
+		av.Value = &commonpb.AnyValue_StringValue{
+			StringValue: "INVALID",
+		}
+	}
+	return av
+}
+
+func boolSliceValues(vals []bool) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_BoolValue{
+				BoolValue: v,
+			},
+		}
+	}
+	return converted
+}
+
+func int64SliceValues(vals []int64) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_IntValue{
+				IntValue: v,
+			},
+		}
+	}
+	return converted
+}
+
+func float64SliceValues(vals []float64) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_DoubleValue{
+				DoubleValue: v,
+			},
+		}
+	}
+	return converted
+}
+
+func stringSliceValues(vals []string) []*commonpb.AnyValue {
+	converted := make([]*commonpb.AnyValue, len(vals))
+	for i, v := range vals {
+		converted[i] = &commonpb.AnyValue{
+			Value: &commonpb.AnyValue_StringValue{
+				StringValue: v,
+			},
+		}
+	}
+	return converted
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go

@@ -0,0 +1,21 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	commonpb "go.opentelemetry.io/proto/otlp/common/v1"
+
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+)
+
+func InstrumentationScope(il instrumentation.Scope) *commonpb.InstrumentationScope {
+	if il == (instrumentation.Scope{}) {
+		return nil
+	}
+	return &commonpb.InstrumentationScope{
+		Name:       il.Name,
+		Version:    il.Version,
+		Attributes: Iterator(il.Attributes.Iter()),
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/resource.go

@@ -0,0 +1,18 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	resourcepb "go.opentelemetry.io/proto/otlp/resource/v1"
+
+	"go.opentelemetry.io/otel/sdk/resource"
+)
+
+// Resource transforms a Resource into an OTLP Resource.
+func Resource(r *resource.Resource) *resourcepb.Resource {
+	if r == nil {
+		return nil
+	}
+	return &resourcepb.Resource{Attributes: ResourceAttributes(r)}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform/span.go

@@ -0,0 +1,221 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package tracetransform // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform"
+
+import (
+	"math"
+
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	"go.opentelemetry.io/otel/sdk/instrumentation"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Spans transforms a slice of OpenTelemetry spans into a slice of OTLP
+// ResourceSpans.
+func Spans(sdl []tracesdk.ReadOnlySpan) []*tracepb.ResourceSpans {
+	if len(sdl) == 0 {
+		return nil
+	}
+
+	rsm := make(map[attribute.Distinct]*tracepb.ResourceSpans)
+
+	type key struct {
+		r  attribute.Distinct
+		is instrumentation.Scope
+	}
+	ssm := make(map[key]*tracepb.ScopeSpans)
+
+	var resources int
+	for _, sd := range sdl {
+		if sd == nil {
+			continue
+		}
+
+		rKey := sd.Resource().Equivalent()
+		k := key{
+			r:  rKey,
+			is: sd.InstrumentationScope(),
+		}
+		scopeSpan, iOk := ssm[k]
+		if !iOk {
+			// Either the resource or instrumentation scope were unknown.
+			scopeSpan = &tracepb.ScopeSpans{
+				Scope:     InstrumentationScope(sd.InstrumentationScope()),
+				Spans:     []*tracepb.Span{},
+				SchemaUrl: sd.InstrumentationScope().SchemaURL,
+			}
+		}
+		scopeSpan.Spans = append(scopeSpan.Spans, span(sd))
+		ssm[k] = scopeSpan
+
+		rs, rOk := rsm[rKey]
+		if !rOk {
+			resources++
+			// The resource was unknown.
+			rs = &tracepb.ResourceSpans{
+				Resource:   Resource(sd.Resource()),
+				ScopeSpans: []*tracepb.ScopeSpans{scopeSpan},
+				SchemaUrl:  sd.Resource().SchemaURL(),
+			}
+			rsm[rKey] = rs
+			continue
+		}
+
+		// The resource has been seen before. Check if the instrumentation
+		// library lookup was unknown because if so we need to add it to the
+		// ResourceSpans. Otherwise, the instrumentation library has already
+		// been seen and the append we did above will be included it in the
+		// ScopeSpans reference.
+		if !iOk {
+			rs.ScopeSpans = append(rs.ScopeSpans, scopeSpan)
+		}
+	}
+
+	// Transform the categorized map into a slice
+	rss := make([]*tracepb.ResourceSpans, 0, resources)
+	for _, rs := range rsm {
+		rss = append(rss, rs)
+	}
+	return rss
+}
+
+// span transforms a Span into an OTLP span.
+func span(sd tracesdk.ReadOnlySpan) *tracepb.Span {
+	if sd == nil {
+		return nil
+	}
+
+	tid := sd.SpanContext().TraceID()
+	sid := sd.SpanContext().SpanID()
+
+	s := &tracepb.Span{
+		TraceId:                tid[:],
+		SpanId:                 sid[:],
+		TraceState:             sd.SpanContext().TraceState().String(),
+		Status:                 status(sd.Status().Code, sd.Status().Description),
+		StartTimeUnixNano:      uint64(max(0, sd.StartTime().UnixNano())), // nolint:gosec // Overflow checked.
+		EndTimeUnixNano:        uint64(max(0, sd.EndTime().UnixNano())),   // nolint:gosec // Overflow checked.
+		Links:                  links(sd.Links()),
+		Kind:                   spanKind(sd.SpanKind()),
+		Name:                   sd.Name(),
+		Attributes:             KeyValues(sd.Attributes()),
+		Events:                 spanEvents(sd.Events()),
+		DroppedAttributesCount: clampUint32(sd.DroppedAttributes()),
+		DroppedEventsCount:     clampUint32(sd.DroppedEvents()),
+		DroppedLinksCount:      clampUint32(sd.DroppedLinks()),
+	}
+
+	if psid := sd.Parent().SpanID(); psid.IsValid() {
+		s.ParentSpanId = psid[:]
+	}
+	s.Flags = buildSpanFlagsWith(sd.SpanContext().TraceFlags(), sd.Parent())
+
+	return s
+}
+
+func clampUint32(v int) uint32 {
+	if v < 0 {
+		return 0
+	}
+	if int64(v) > math.MaxUint32 {
+		return math.MaxUint32
+	}
+	return uint32(v) // nolint: gosec  // Overflow/Underflow checked.
+}
+
+// status transform a span code and message into an OTLP span status.
+func status(status codes.Code, message string) *tracepb.Status {
+	var c tracepb.Status_StatusCode
+	switch status {
+	case codes.Ok:
+		c = tracepb.Status_STATUS_CODE_OK
+	case codes.Error:
+		c = tracepb.Status_STATUS_CODE_ERROR
+	default:
+		c = tracepb.Status_STATUS_CODE_UNSET
+	}
+	return &tracepb.Status{
+		Code:    c,
+		Message: message,
+	}
+}
+
+// links transforms span Links to OTLP span links.
+func links(links []tracesdk.Link) []*tracepb.Span_Link {
+	if len(links) == 0 {
+		return nil
+	}
+
+	sl := make([]*tracepb.Span_Link, 0, len(links))
+	for _, otLink := range links {
+		// This redefinition is necessary to prevent otLink.*ID[:] copies
+		// being reused -- in short we need a new otLink per iteration.
+
+		tid := otLink.SpanContext.TraceID()
+		sid := otLink.SpanContext.SpanID()
+
+		flags := buildSpanFlagsWith(otLink.SpanContext.TraceFlags(), otLink.SpanContext)
+
+		sl = append(sl, &tracepb.Span_Link{
+			TraceId:                tid[:],
+			SpanId:                 sid[:],
+			Attributes:             KeyValues(otLink.Attributes),
+			DroppedAttributesCount: clampUint32(otLink.DroppedAttributeCount),
+			Flags:                  flags,
+		})
+	}
+	return sl
+}
+
+func buildSpanFlagsWith(tf trace.TraceFlags, parent trace.SpanContext) uint32 {
+	// Lower 8 bits are the W3C TraceFlags; always indicate that we know whether the parent is remote
+	flags := uint32(tf) | uint32(tracepb.SpanFlags_SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK)
+	// Set the parent-is-remote bit when applicable
+	if parent.IsRemote() {
+		flags |= uint32(tracepb.SpanFlags_SPAN_FLAGS_CONTEXT_IS_REMOTE_MASK)
+	}
+
+	return flags // nolint:gosec // Flags is a bitmask and can't be negative
+}
+
+// spanEvents transforms span Events to an OTLP span events.
+func spanEvents(es []tracesdk.Event) []*tracepb.Span_Event {
+	if len(es) == 0 {
+		return nil
+	}
+
+	events := make([]*tracepb.Span_Event, len(es))
+	// Transform message events
+	for i := range es {
+		events[i] = &tracepb.Span_Event{
+			Name:                   es[i].Name,
+			TimeUnixNano:           uint64(max(0, es[i].Time.UnixNano())), // nolint:gosec // Overflow checked.
+			Attributes:             KeyValues(es[i].Attributes),
+			DroppedAttributesCount: clampUint32(es[i].DroppedAttributeCount),
+		}
+	}
+	return events
+}
+
+// spanKind transforms a SpanKind to an OTLP span kind.
+func spanKind(kind trace.SpanKind) tracepb.Span_SpanKind {
+	switch kind {
+	case trace.SpanKindInternal:
+		return tracepb.Span_SPAN_KIND_INTERNAL
+	case trace.SpanKindClient:
+		return tracepb.Span_SPAN_KIND_CLIENT
+	case trace.SpanKindServer:
+		return tracepb.Span_SPAN_KIND_SERVER
+	case trace.SpanKindProducer:
+		return tracepb.Span_SPAN_KIND_PRODUCER
+	case trace.SpanKindConsumer:
+		return tracepb.Span_SPAN_KIND_CONSUMER
+	default:
+		return tracepb.Span_SPAN_KIND_UNSPECIFIED
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/LICENSE

@@ -0,0 +1,231 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+
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+
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+      other entities that control, are controlled by, or are under common
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+
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+      any Contribution intentionally submitted for inclusion in the Work
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+      the terms of any separate license agreement you may have executed
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+
+   END OF TERMS AND CONDITIONS
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+   Copyright [yyyy] [name of copyright owner]
+
+   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
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+--------------------------------------------------------------------------------
+
+Copyright 2009 The Go Authors.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
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+
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+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/README.md

@@ -0,0 +1,3 @@
+# OTLP Trace gRPC Exporter
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc)

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/client.go

@@ -0,0 +1,323 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"time"
+
+	coltracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+	"google.golang.org/genproto/googleapis/rpc/errdetails"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/counter"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/retry"
+)
+
+type client struct {
+	endpoint      string
+	dialOpts      []grpc.DialOption
+	metadata      metadata.MD
+	exportTimeout time.Duration
+	requestFunc   retry.RequestFunc
+
+	// stopCtx is used as a parent context for all exports. Therefore, when it
+	// is canceled with the stopFunc all exports are canceled.
+	stopCtx context.Context
+	// stopFunc cancels stopCtx, stopping any active exports.
+	stopFunc context.CancelFunc
+
+	// ourConn keeps track of where conn was created: true if created here on
+	// Start, or false if passed with an option. This is important on Shutdown
+	// as the conn should only be closed if created here on start. Otherwise,
+	// it is up to the processes that passed the conn to close it.
+	ourConn bool
+	conn    *grpc.ClientConn
+	tscMu   sync.RWMutex
+	tsc     coltracepb.TraceServiceClient
+
+	instID int64
+	inst   *observ.Instrumentation
+}
+
+// Compile time check *client implements otlptrace.Client.
+var _ otlptrace.Client = (*client)(nil)
+
+// NewClient creates a new gRPC trace client.
+func NewClient(opts ...Option) otlptrace.Client {
+	return newClient(opts...)
+}
+
+func newClient(opts ...Option) *client {
+	cfg := otlpconfig.NewGRPCConfig(asGRPCOptions(opts)...)
+
+	ctx, cancel := context.WithCancel(context.Background()) //nolint:gosec  // cancel called in client shutdown.
+
+	c := &client{
+		endpoint:      cfg.Traces.Endpoint,
+		exportTimeout: cfg.Traces.Timeout,
+		requestFunc:   cfg.RetryConfig.RequestFunc(retryable),
+		dialOpts:      cfg.DialOptions,
+		stopCtx:       ctx,
+		stopFunc:      cancel,
+		conn:          cfg.GRPCConn,
+		instID:        counter.NextExporterID(),
+	}
+
+	if len(cfg.Traces.Headers) > 0 {
+		c.metadata = metadata.New(cfg.Traces.Headers)
+	}
+
+	return c
+}
+
+// Start establishes a gRPC connection to the collector.
+func (c *client) Start(context.Context) error {
+	if c.conn == nil {
+		// If the caller did not provide a ClientConn when the client was
+		// created, create one using the configuration they did provide.
+		conn, err := grpc.NewClient(c.endpoint, c.dialOpts...)
+		if err != nil {
+			return err
+		}
+		// Keep track that we own the lifecycle of this conn and need to close
+		// it on Shutdown.
+		c.ourConn = true
+		c.conn = conn
+	}
+
+	// Initialize the instrumentation if not already done.
+	//
+	// Initialize here instead of NewClient to allow any errors to be passed
+	// back to the caller and so that any setup of the environment variables to
+	// enable instrumentation can be set via code.
+	var err error
+	if c.inst == nil {
+		target := c.conn.CanonicalTarget()
+		c.inst, err = observ.NewInstrumentation(c.instID, target)
+	}
+
+	// The otlptrace.Client interface states this method is called just once,
+	// so no need to check if already started.
+	c.tscMu.Lock()
+	c.tsc = coltracepb.NewTraceServiceClient(c.conn)
+	c.tscMu.Unlock()
+
+	return err
+}
+
+var errAlreadyStopped = errors.New("the client is already stopped")
+
+// Stop shuts down the client.
+//
+// Any active connections to a remote endpoint are closed if they were created
+// by the client. Any gRPC connection passed during creation using
+// WithGRPCConn will not be closed. It is the caller's responsibility to
+// handle cleanup of that resource.
+//
+// This method synchronizes with the UploadTraces method of the client. It
+// will wait for any active calls to that method to complete unimpeded, or it
+// will cancel any active calls if ctx expires. If ctx expires, the context
+// error will be forwarded as the returned error. All client held resources
+// will still be released in this situation.
+//
+// If the client has already stopped, an error will be returned describing
+// this.
+func (c *client) Stop(ctx context.Context) error {
+	// Make sure to return context error if the context is done when calling this method.
+	err := ctx.Err()
+
+	// Acquire the c.tscMu lock within the ctx lifetime.
+	acquired := make(chan struct{})
+	go func() {
+		c.tscMu.Lock()
+		close(acquired)
+	}()
+
+	select {
+	case <-ctx.Done():
+		// The Stop timeout is reached. Kill any remaining exports to force
+		// the clear of the lock and save the timeout error to return and
+		// signal the shutdown timed out before cleanly stopping.
+		c.stopFunc()
+		err = ctx.Err()
+
+		// To ensure the client is not left in a dirty state c.tsc needs to be
+		// set to nil. To avoid the race condition when doing this, ensure
+		// that all the exports are killed (initiated by c.stopFunc).
+		<-acquired
+	case <-acquired:
+	}
+	// Hold the tscMu lock for the rest of the function to ensure no new
+	// exports are started.
+	defer c.tscMu.Unlock()
+
+	// The otlptrace.Client interface states this method is called only
+	// once, but there is no guarantee it is called after Start. Ensure the
+	// client is started before doing anything and let the called know if they
+	// made a mistake.
+	if c.tsc == nil {
+		return errAlreadyStopped
+	}
+
+	// Clear c.tsc to signal the client is stopped.
+	c.tsc = nil
+
+	if c.ourConn {
+		closeErr := c.conn.Close()
+		// A context timeout error takes precedence over this error.
+		if err == nil && closeErr != nil {
+			err = closeErr
+		}
+	}
+	return err
+}
+
+var errShutdown = errors.New("the client is shutdown")
+
+// UploadTraces sends a batch of spans.
+//
+// Retryable errors from the server will be handled according to any
+// RetryConfig the client was created with.
+func (c *client) UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) (uploadErr error) {
+	// Hold a read lock to ensure a shut down initiated after this starts does
+	// not abandon the export. This read lock acquire has less priority than a
+	// write lock acquire (i.e. Stop), meaning if the client is shutting down
+	// this will come after the shut down.
+	c.tscMu.RLock()
+	defer c.tscMu.RUnlock()
+
+	if c.tsc == nil {
+		return errShutdown
+	}
+
+	ctx, cancel := c.exportContext(ctx)
+	defer cancel()
+
+	var code codes.Code
+	if c.inst != nil {
+		op := c.inst.ExportSpans(ctx, len(protoSpans))
+		defer func() { op.End(uploadErr, code) }()
+	}
+
+	return c.requestFunc(ctx, func(iCtx context.Context) error {
+		resp, err := c.tsc.Export(iCtx, &coltracepb.ExportTraceServiceRequest{
+			ResourceSpans: protoSpans,
+		})
+		if resp != nil && resp.PartialSuccess != nil {
+			msg := resp.PartialSuccess.GetErrorMessage()
+			n := resp.PartialSuccess.GetRejectedSpans()
+			if n != 0 || msg != "" {
+				e := internal.TracePartialSuccessError(n, msg)
+				uploadErr = errors.Join(uploadErr, e)
+			}
+		}
+		// nil is converted to OK.
+		code = status.Code(err)
+		if code == codes.OK {
+			// Success.
+			return uploadErr
+		}
+		return errors.Join(uploadErr, err)
+	})
+}
+
+// exportContext returns a copy of parent with an appropriate deadline and
+// cancellation function.
+//
+// It is the callers responsibility to cancel the returned context once its
+// use is complete, via the parent or directly with the returned CancelFunc, to
+// ensure all resources are correctly released.
+func (c *client) exportContext(parent context.Context) (context.Context, context.CancelFunc) {
+	var (
+		ctx    context.Context
+		cancel context.CancelFunc
+	)
+
+	if c.exportTimeout > 0 {
+		ctx, cancel = context.WithTimeoutCause(parent, c.exportTimeout, errors.New("exporter export timeout"))
+	} else {
+		ctx, cancel = context.WithCancel(parent) //nolint:gosec  // cancel called by caller when export is complete.
+	}
+
+	if c.metadata.Len() > 0 {
+		md := c.metadata
+		if outMD, ok := metadata.FromOutgoingContext(ctx); ok {
+			md = metadata.Join(md, outMD)
+		}
+
+		ctx = metadata.NewOutgoingContext(ctx, md)
+	}
+
+	// Unify the client stopCtx with the parent.
+	go func() {
+		select {
+		case <-ctx.Done():
+		case <-c.stopCtx.Done():
+			// Cancel the export as the shutdown has timed out.
+			cancel()
+		}
+	}()
+
+	return ctx, cancel
+}
+
+// retryable returns if err identifies a request that can be retried and a
+// duration to wait for if an explicit throttle time is included in err.
+func retryable(err error) (bool, time.Duration) {
+	s := status.Convert(err)
+	return retryableGRPCStatus(s)
+}
+
+func retryableGRPCStatus(s *status.Status) (bool, time.Duration) {
+	switch s.Code() {
+	case codes.Canceled,
+		codes.DeadlineExceeded,
+		codes.Aborted,
+		codes.OutOfRange,
+		codes.Unavailable,
+		codes.DataLoss:
+		// Additionally handle RetryInfo.
+		_, d := throttleDelay(s)
+		return true, d
+	case codes.ResourceExhausted:
+		// Retry only if the server signals that the recovery from resource exhaustion is possible.
+		return throttleDelay(s)
+	}
+
+	// Not a retry-able error.
+	return false, 0
+}
+
+// throttleDelay returns of the status is RetryInfo
+// and the its duration to wait for if an explicit throttle time.
+func throttleDelay(s *status.Status) (bool, time.Duration) {
+	for _, detail := range s.Details() {
+		if t, ok := detail.(*errdetails.RetryInfo); ok {
+			return true, t.RetryDelay.AsDuration()
+		}
+	}
+	return false, 0
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Client.
+func (c *client) MarshalLog() any {
+	return struct {
+		Type     string
+		Endpoint string
+	}{
+		Type:     "otlptracegrpc",
+		Endpoint: c.endpoint,
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/doc.go

@@ -0,0 +1,65 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+/*
+Package otlptracegrpc provides an OTLP span exporter using gRPC.
+By default the telemetry is sent to https://localhost:4317.
+
+Exporter should be created using [New].
+
+The environment variables described below can be used for configuration.
+
+OTEL_EXPORTER_OTLP_ENDPOINT, OTEL_EXPORTER_OTLP_TRACES_ENDPOINT (default: "https://localhost:4317") -
+target to which the exporter sends telemetry.
+The target syntax is defined in https://github.com/grpc/grpc/blob/master/doc/naming.md.
+The value must contain a scheme ("http" or "https") and host.
+The value may additionally contain a port, and a path.
+The value should not contain a query string or fragment.
+OTEL_EXPORTER_OTLP_TRACES_ENDPOINT takes precedence over OTEL_EXPORTER_OTLP_ENDPOINT.
+The configuration can be overridden by [WithEndpoint], [WithEndpointURL], [WithInsecure], and [WithGRPCConn] options.
+
+OTEL_EXPORTER_OTLP_INSECURE, OTEL_EXPORTER_OTLP_TRACES_INSECURE (default: "false") -
+setting "true" disables client transport security for the exporter's gRPC connection.
+You can use this only when an endpoint is provided without the http or https scheme.
+OTEL_EXPORTER_OTLP_ENDPOINT, OTEL_EXPORTER_OTLP_TRACES_ENDPOINT setting overrides
+the scheme defined via OTEL_EXPORTER_OTLP_ENDPOINT, OTEL_EXPORTER_OTLP_TRACES_ENDPOINT.
+OTEL_EXPORTER_OTLP_TRACES_INSECURE takes precedence over OTEL_EXPORTER_OTLP_INSECURE.
+The configuration can be overridden by [WithInsecure], [WithGRPCConn] options.
+
+OTEL_EXPORTER_OTLP_HEADERS, OTEL_EXPORTER_OTLP_TRACES_HEADERS (default: none) -
+key-value pairs used as gRPC metadata associated with gRPC requests.
+The value is expected to be represented in a format matching the [W3C Baggage HTTP Header Content Format],
+except that additional semi-colon delimited metadata is not supported.
+Example value: "key1=value1,key2=value2".
+OTEL_EXPORTER_OTLP_TRACES_HEADERS takes precedence over OTEL_EXPORTER_OTLP_HEADERS.
+The configuration can be overridden by [WithHeaders] option.
+
+OTEL_EXPORTER_OTLP_TIMEOUT, OTEL_EXPORTER_OTLP_TRACES_TIMEOUT (default: "10000") -
+maximum time in milliseconds the OTLP exporter waits for each batch export.
+OTEL_EXPORTER_OTLP_TRACES_TIMEOUT takes precedence over OTEL_EXPORTER_OTLP_TIMEOUT.
+The configuration can be overridden by [WithTimeout] option.
+
+OTEL_EXPORTER_OTLP_COMPRESSION, OTEL_EXPORTER_OTLP_TRACES_COMPRESSION (default: none) -
+the gRPC compressor the exporter uses.
+Supported value: "gzip".
+OTEL_EXPORTER_OTLP_TRACES_COMPRESSION takes precedence over OTEL_EXPORTER_OTLP_COMPRESSION.
+The configuration can be overridden by [WithCompressor], [WithGRPCConn] options.
+
+OTEL_EXPORTER_OTLP_CERTIFICATE, OTEL_EXPORTER_OTLP_TRACES_CERTIFICATE (default: none) -
+the filepath to the trusted certificate to use when verifying a server's TLS credentials.
+OTEL_EXPORTER_OTLP_TRACES_CERTIFICATE takes precedence over OTEL_EXPORTER_OTLP_CERTIFICATE.
+The configuration can be overridden by [WithTLSCredentials], [WithGRPCConn] options.
+
+OTEL_EXPORTER_OTLP_CLIENT_CERTIFICATE, OTEL_EXPORTER_OTLP_TRACES_CLIENT_CERTIFICATE (default: none) -
+the filepath to the client certificate/chain trust for client's private key to use in mTLS communication in PEM format.
+OTEL_EXPORTER_OTLP_TRACES_CLIENT_CERTIFICATE takes precedence over OTEL_EXPORTER_OTLP_CLIENT_CERTIFICATE.
+The configuration can be overridden by [WithTLSCredentials], [WithGRPCConn] options.
+
+OTEL_EXPORTER_OTLP_CLIENT_KEY, OTEL_EXPORTER_OTLP_TRACES_CLIENT_KEY (default: none) -
+the filepath to the client's private key to use in mTLS communication in PEM format.
+OTEL_EXPORTER_OTLP_TRACES_CLIENT_KEY takes precedence over OTEL_EXPORTER_OTLP_CLIENT_KEY.
+The configuration can be overridden by [WithTLSCredentials], [WithGRPCConn] option.
+
+[W3C Baggage HTTP Header Content Format]: https://www.w3.org/TR/baggage/#header-content
+*/
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/exporter.go

@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+)
+
+// New constructs a new Exporter and starts it.
+func New(ctx context.Context, opts ...Option) (*otlptrace.Exporter, error) {
+	return otlptrace.New(ctx, NewClient(opts...))
+}
+
+// NewUnstarted constructs a new Exporter and does not start it.
+func NewUnstarted(opts ...Option) *otlptrace.Exporter {
+	return otlptrace.NewUnstarted(NewClient(opts...))
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/counter/counter.go

@@ -0,0 +1,31 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/counter/counter.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package counter provides a simple counter for generating unique IDs.
+//
+// This package is used to generate unique IDs while allowing testing packages
+// to reset the counter.
+package counter // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/counter"
+
+import "sync/atomic"
+
+// exporterN is a global 0-based count of the number of exporters created.
+var exporterN atomic.Int64
+
+// NextExporterID returns the next unique ID for an exporter.
+func NextExporterID() int64 {
+	const inc = 1
+	return exporterN.Add(inc) - inc
+}
+
+// SetExporterID sets the exporter ID counter to v and returns the previous
+// value.
+//
+// This function is useful for testing purposes, allowing you to reset the
+// counter. It should not be used in production code.
+func SetExporterID(v int64) int64 {
+	return exporterN.Swap(v)
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig.go

@@ -0,0 +1,217 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/envconfig/envconfig.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package envconfig provides functionality to parse configuration from
+// environment variables.
+package envconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"fmt"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+	"unicode"
+
+	"go.opentelemetry.io/otel/internal/global"
+)
+
+// ConfigFn is the generic function used to set a config.
+type ConfigFn func(*EnvOptionsReader)
+
+// EnvOptionsReader reads the required environment variables.
+type EnvOptionsReader struct {
+	GetEnv    func(string) string
+	ReadFile  func(string) ([]byte, error)
+	Namespace string
+}
+
+// Apply runs every ConfigFn.
+func (e *EnvOptionsReader) Apply(opts ...ConfigFn) {
+	for _, o := range opts {
+		o(e)
+	}
+}
+
+// GetEnvValue gets an OTLP environment variable value of the specified key
+// using the GetEnv function.
+// This function prepends the OTLP specified namespace to all key lookups.
+func (e *EnvOptionsReader) GetEnvValue(key string) (string, bool) {
+	v := strings.TrimSpace(e.GetEnv(keyWithNamespace(e.Namespace, key)))
+	return v, v != ""
+}
+
+// WithString retrieves the specified config and passes it to ConfigFn as a string.
+func WithString(n string, fn func(string)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			fn(v)
+		}
+	}
+}
+
+// WithBool returns a ConfigFn that reads the environment variable n and if it exists passes its parsed bool value to fn.
+func WithBool(n string, fn func(bool)) ConfigFn {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			b := strings.ToLower(v) == "true"
+			fn(b)
+		}
+	}
+}
+
+// WithDuration retrieves the specified config and passes it to ConfigFn as a duration.
+func WithDuration(n string, fn func(time.Duration)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			d, err := strconv.Atoi(v)
+			if err != nil {
+				global.Error(err, "parse duration", "input", v)
+				return
+			}
+			fn(time.Duration(d) * time.Millisecond)
+		}
+	}
+}
+
+// WithHeaders retrieves the specified config and passes it to ConfigFn as a map of HTTP headers.
+func WithHeaders(n string, fn func(map[string]string)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			fn(stringToHeader(v))
+		}
+	}
+}
+
+// WithURL retrieves the specified config and passes it to ConfigFn as a net/url.URL.
+func WithURL(n string, fn func(*url.URL)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			u, err := url.Parse(v)
+			if err != nil {
+				global.Error(err, "parse url", "input", v)
+				return
+			}
+			fn(u)
+		}
+	}
+}
+
+// WithCertPool returns a ConfigFn that reads the environment variable n as a filepath to a TLS certificate pool. If it exists, it is parsed as a crypto/x509.CertPool and it is passed to fn.
+func WithCertPool(n string, fn func(*x509.CertPool)) ConfigFn {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			b, err := e.ReadFile(v)
+			if err != nil {
+				global.Error(err, "read tls ca cert file", "file", v)
+				return
+			}
+			c, err := createCertPool(b)
+			if err != nil {
+				global.Error(err, "create tls cert pool")
+				return
+			}
+			fn(c)
+		}
+	}
+}
+
+// WithClientCert returns a ConfigFn that reads the environment variable nc and nk as filepaths to a client certificate and key pair. If they exists, they are parsed as a crypto/tls.Certificate and it is passed to fn.
+func WithClientCert(nc, nk string, fn func(tls.Certificate)) ConfigFn {
+	return func(e *EnvOptionsReader) {
+		vc, okc := e.GetEnvValue(nc)
+		vk, okk := e.GetEnvValue(nk)
+		if !okc || !okk {
+			return
+		}
+		cert, err := e.ReadFile(vc)
+		if err != nil {
+			global.Error(err, "read tls client cert", "file", vc)
+			return
+		}
+		key, err := e.ReadFile(vk)
+		if err != nil {
+			global.Error(err, "read tls client key", "file", vk)
+			return
+		}
+		crt, err := tls.X509KeyPair(cert, key)
+		if err != nil {
+			global.Error(err, "create tls client key pair")
+			return
+		}
+		fn(crt)
+	}
+}
+
+func keyWithNamespace(ns, key string) string {
+	if ns == "" {
+		return key
+	}
+	return fmt.Sprintf("%s_%s", ns, key)
+}
+
+func stringToHeader(value string) map[string]string {
+	headersPairs := strings.Split(value, ",")
+	headers := make(map[string]string)
+
+	for _, header := range headersPairs {
+		n, v, found := strings.Cut(header, "=")
+		if !found {
+			global.Error(errors.New("missing '="), "parse headers", "input", header)
+			continue
+		}
+
+		trimmedName := strings.TrimSpace(n)
+
+		// Validate the key.
+		if !isValidHeaderKey(trimmedName) {
+			global.Error(errors.New("invalid header key"), "parse headers", "key", trimmedName)
+			continue
+		}
+
+		// Only decode the value.
+		value, err := url.PathUnescape(v)
+		if err != nil {
+			global.Error(err, "escape header value", "value", v)
+			continue
+		}
+		trimmedValue := strings.TrimSpace(value)
+
+		headers[trimmedName] = trimmedValue
+	}
+
+	return headers
+}
+
+func createCertPool(certBytes []byte) (*x509.CertPool, error) {
+	cp := x509.NewCertPool()
+	if ok := cp.AppendCertsFromPEM(certBytes); !ok {
+		return nil, errors.New("failed to append certificate to the cert pool")
+	}
+	return cp, nil
+}
+
+func isValidHeaderKey(key string) bool {
+	if key == "" {
+		return false
+	}
+	for _, c := range key {
+		if !isTokenChar(c) {
+			return false
+		}
+	}
+	return true
+}
+
+func isTokenChar(c rune) bool {
+	return c <= unicode.MaxASCII && (unicode.IsLetter(c) ||
+		unicode.IsDigit(c) ||
+		c == '!' || c == '#' || c == '$' || c == '%' || c == '&' || c == '\'' || c == '*' ||
+		c == '+' || c == '-' || c == '.' || c == '^' || c == '_' || c == '`' || c == '|' || c == '~')
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/gen.go

@@ -0,0 +1,34 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package internal provides internal functionally for the otlptracegrpc package.
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/partialsuccess.go.tmpl "--data={}" --out=partialsuccess.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/partialsuccess_test.go.tmpl "--data={}" --out=partialsuccess_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/retry/retry.go.tmpl "--data={}" --out=retry/retry.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/retry/retry_test.go.tmpl "--data={}" --out=retry/retry_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/envconfig/envconfig.go.tmpl "--data={}" --out=envconfig/envconfig.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/envconfig/envconfig_test.go.tmpl "--data={}" --out=envconfig/envconfig_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl "--data={\"envconfigImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig\"}" --out=otlpconfig/envconfig.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl "--data={\"retryImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/retry\"}" --out=otlpconfig/options.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlpconfig/options_test.go.tmpl "--data={\"envconfigImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig\"}" --out=otlpconfig/options_test.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl "--data={}" --out=otlpconfig/optiontypes.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl "--data={}" --out=otlpconfig/tls.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlptracetest/client.go.tmpl "--data={}" --out=otlptracetest/client.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlptracetest/collector.go.tmpl "--data={}" --out=otlptracetest/collector.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlptracetest/data.go.tmpl "--data={}" --out=otlptracetest/data.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlptrace/otlptracetest/otlptest.go.tmpl "--data={}" --out=otlptracetest/otlptest.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/x/x.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc\" }" --out=x/x.go
+//go:generate gotmpl --body=../../../../../internal/shared/x/x_test.go.tmpl "--data={}" --out=x/x_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/observ/target.go.tmpl "--data={ \"pkg\": \"observ\", \"pkg_path\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ\" }" --out=observ/target.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/observ/target_test.go.tmpl "--data={ \"pkg\": \"observ\" }" --out=observ/target_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/counter/counter.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/counter\" }" --out=counter/counter.go
+//go:generate gotmpl --body=../../../../../internal/shared/counter/counter_test.go.tmpl "--data={}" --out=counter/counter_test.go

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ/doc.go

@@ -0,0 +1,6 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package observ provides experimental observability instrumentation for the
+// otlptracegrpc exporter.
+package observ // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ"

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ/instrumentation.go

@@ -0,0 +1,350 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package observ // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc/codes"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/x"
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/metric"
+	semconv "go.opentelemetry.io/otel/semconv/v1.40.0"
+	"go.opentelemetry.io/otel/semconv/v1.40.0/otelconv"
+)
+
+const (
+	// ScopeName is the unique name of the meter used for instrumentation.
+	ScopeName = "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ"
+
+	// SchemaURL is the schema URL of the metrics produced by this
+	// instrumentation.
+	SchemaURL = semconv.SchemaURL
+
+	// Version is the current version of this instrumentation.
+	//
+	// This matches the version of the exporter.
+	Version = internal.Version
+)
+
+var (
+	measureAttrsPool = &sync.Pool{
+		New: func() any {
+			const n = 1 + // component.name
+				1 + // component.type
+				1 + // server.addr
+				1 + // server.port
+				1 + // error.type
+				1 // rpc.grpc.status_code
+			s := make([]attribute.KeyValue, 0, n)
+			// Return a pointer to a slice instead of a slice itself
+			// to avoid allocations on every call.
+			return &s
+		},
+	}
+
+	addOptPool = &sync.Pool{
+		New: func() any {
+			const n = 1 // WithAttributeSet
+			o := make([]metric.AddOption, 0, n)
+			return &o
+		},
+	}
+
+	recordOptPool = &sync.Pool{
+		New: func() any {
+			const n = 1 // WithAttributeSet
+			o := make([]metric.RecordOption, 0, n)
+			return &o
+		},
+	}
+)
+
+func get[T any](p *sync.Pool) *[]T { return p.Get().(*[]T) }
+
+func put[T any](p *sync.Pool, s *[]T) {
+	*s = (*s)[:0] // Reset.
+	p.Put(s)
+}
+
+// ComponentName returns the component name for the exporter with the
+// provided ID.
+func ComponentName(id int64) string {
+	t := semconv.OTelComponentTypeOtlpGRPCSpanExporter.Value.AsString()
+	return fmt.Sprintf("%s/%d", t, id)
+}
+
+// Instrumentation is experimental instrumentation for the exporter.
+type Instrumentation struct {
+	inflightSpans metric.Int64UpDownCounter
+	exportedSpans metric.Int64Counter
+	opDuration    metric.Float64Histogram
+
+	attrs  []attribute.KeyValue
+	addOpt metric.AddOption
+	recOpt metric.RecordOption
+}
+
+// NewInstrumentation returns instrumentation for an OTLP over gPRC trace
+// exporter with the provided ID using the global MeterProvider.
+//
+// The id should be the unique exporter instance ID. It is used
+// to set the "component.name" attribute.
+//
+// The target is the endpoint the exporter is exporting to.
+//
+// If the experimental observability is disabled, nil is returned.
+func NewInstrumentation(id int64, target string) (*Instrumentation, error) {
+	if !x.Observability.Enabled() {
+		return nil, nil
+	}
+
+	attrs := BaseAttrs(id, target)
+	i := &Instrumentation{
+		attrs:  attrs,
+		addOpt: metric.WithAttributeSet(attribute.NewSet(attrs...)),
+
+		// Do not modify attrs (NewSet sorts in-place), make a new slice.
+		recOpt: metric.WithAttributeSet(attribute.NewSet(append(
+			// Default to OK status code.
+			[]attribute.KeyValue{
+				semconv.RPCResponseStatusCode(codes.OK.String()),
+			},
+			attrs...,
+		)...)),
+	}
+
+	mp := otel.GetMeterProvider()
+	m := mp.Meter(
+		ScopeName,
+		metric.WithInstrumentationVersion(Version),
+		metric.WithSchemaURL(SchemaURL),
+	)
+
+	var err error
+
+	inflightSpans, e := otelconv.NewSDKExporterSpanInflight(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create span inflight metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.inflightSpans = inflightSpans.Inst()
+
+	exportedSpans, e := otelconv.NewSDKExporterSpanExported(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create span exported metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.exportedSpans = exportedSpans.Inst()
+
+	opDuration, e := otelconv.NewSDKExporterOperationDuration(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create operation duration metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.opDuration = opDuration.Inst()
+
+	return i, err
+}
+
+// BaseAttrs returns the base attributes for the exporter with the provided ID
+// and target.
+//
+// The id should be the unique exporter instance ID. It is used
+// to set the "component.name" attribute.
+//
+// The target is the gRPC target the exporter is exporting to. It is expected
+// to be the output of the Client's CanonicalTarget method.
+func BaseAttrs(id int64, target string) []attribute.KeyValue {
+	host, port, err := ParseCanonicalTarget(target)
+	if err != nil || (host == "" && port < 0) {
+		if err != nil {
+			global.Debug("failed to parse target", "target", target, "error", err)
+		}
+		return []attribute.KeyValue{
+			semconv.OTelComponentName(ComponentName(id)),
+			semconv.OTelComponentTypeOtlpGRPCSpanExporter,
+		}
+	}
+
+	// Do not use append so the slice is exactly allocated.
+
+	if port < 0 {
+		return []attribute.KeyValue{
+			semconv.OTelComponentName(ComponentName(id)),
+			semconv.OTelComponentTypeOtlpGRPCSpanExporter,
+			semconv.ServerAddress(host),
+		}
+	}
+
+	if host == "" {
+		return []attribute.KeyValue{
+			semconv.OTelComponentName(ComponentName(id)),
+			semconv.OTelComponentTypeOtlpGRPCSpanExporter,
+			semconv.ServerPort(port),
+		}
+	}
+
+	return []attribute.KeyValue{
+		semconv.OTelComponentName(ComponentName(id)),
+		semconv.OTelComponentTypeOtlpGRPCSpanExporter,
+		semconv.ServerAddress(host),
+		semconv.ServerPort(port),
+	}
+}
+
+// ExportSpans instruments the ExportSpans method of the exporter. It returns
+// an [ExportOp] that must have its [ExportOp.End] method called when the
+// ExportSpans method returns.
+func (i *Instrumentation) ExportSpans(ctx context.Context, nSpans int) ExportOp {
+	start := time.Now()
+
+	if i.inflightSpans.Enabled(ctx) {
+		addOpt := get[metric.AddOption](addOptPool)
+		defer put(addOptPool, addOpt)
+		*addOpt = append(*addOpt, i.addOpt)
+		i.inflightSpans.Add(ctx, int64(nSpans), *addOpt...)
+	}
+
+	return ExportOp{
+		ctx:    ctx,
+		start:  start,
+		nSpans: int64(nSpans),
+		inst:   i,
+	}
+}
+
+// ExportOp tracks the operation being observed by [Instrumentation.ExportSpans].
+type ExportOp struct {
+	ctx    context.Context
+	start  time.Time
+	nSpans int64
+
+	inst *Instrumentation
+}
+
+// End completes the observation of the operation being observed by a call to
+// [Instrumentation.ExportSpans].
+//
+// Any error that is encountered is provided as err.
+//
+// If err is not nil, all spans will be recorded as failures unless error is of
+// type [internal.PartialSuccess]. In the case of a PartialSuccess, the number
+// of successfully exported spans will be determined by inspecting the
+// RejectedItems field of the PartialSuccess.
+func (e ExportOp) End(err error, code codes.Code) {
+	addOpt := get[metric.AddOption](addOptPool)
+	defer put(addOptPool, addOpt)
+	*addOpt = append(*addOpt, e.inst.addOpt)
+
+	if e.inst.inflightSpans.Enabled(e.ctx) {
+		e.inst.inflightSpans.Add(e.ctx, -e.nSpans, *addOpt...)
+	}
+
+	success := successful(e.nSpans, err)
+	// Record successfully exported spans, even if the value is 0 which are
+	// meaningful to distribution aggregations.
+	if e.inst.exportedSpans.Enabled(e.ctx) {
+		e.inst.exportedSpans.Add(e.ctx, success, *addOpt...)
+	}
+
+	if err != nil && e.inst.exportedSpans.Enabled(e.ctx) {
+		attrs := get[attribute.KeyValue](measureAttrsPool)
+		defer put(measureAttrsPool, attrs)
+		*attrs = append(*attrs, e.inst.attrs...)
+		*attrs = append(*attrs, semconv.ErrorType(err))
+
+		// Do not inefficiently make a copy of attrs by using
+		// WithAttributes instead of WithAttributeSet.
+		o := metric.WithAttributeSet(attribute.NewSet(*attrs...))
+		// Reset addOpt with new attribute set.
+		*addOpt = append((*addOpt)[:0], o)
+
+		e.inst.exportedSpans.Add(e.ctx, e.nSpans-success, *addOpt...)
+	}
+
+	if e.inst.opDuration.Enabled(e.ctx) {
+		recOpt := get[metric.RecordOption](recordOptPool)
+		defer put(recordOptPool, recOpt)
+		*recOpt = append(*recOpt, e.inst.recordOption(err, code))
+
+		d := time.Since(e.start).Seconds()
+		e.inst.opDuration.Record(e.ctx, d, *recOpt...)
+	}
+}
+
+// recordOption returns a RecordOption with attributes representing the
+// outcome of the operation being recorded.
+//
+// If err is nil and code is codes.OK, the default recOpt of the
+// Instrumentation is returned.
+//
+// If err is not nil or code is not codes.OK, a new RecordOption is returned
+// with the base attributes of the Instrumentation plus the rpc.grpc.status_code
+// attribute set to the provided code, and if err is not nil, the error.type
+// attribute set to the type of the error.
+func (i *Instrumentation) recordOption(err error, code codes.Code) metric.RecordOption {
+	if err == nil && code == codes.OK {
+		return i.recOpt
+	}
+
+	attrs := get[attribute.KeyValue](measureAttrsPool)
+	defer put(measureAttrsPool, attrs)
+	*attrs = append(*attrs, i.attrs...)
+
+	*attrs = append(*attrs, semconv.RPCResponseStatusCode(code.String()))
+	if err != nil {
+		*attrs = append(*attrs, semconv.ErrorType(err))
+	}
+
+	// Do not inefficiently make a copy of attrs by using WithAttributes
+	// instead of WithAttributeSet.
+	return metric.WithAttributeSet(attribute.NewSet(*attrs...))
+}
+
+// successful returns the number of successfully exported spans out of the n
+// that were exported based on the provided error.
+//
+// If err is nil, n is returned. All spans were successfully exported.
+//
+// If err is not nil and not an [internal.PartialSuccess] error, 0 is returned.
+// It is assumed all spans failed to be exported.
+//
+// If err is an [internal.PartialSuccess] error, the number of successfully
+// exported spans is computed by subtracting the RejectedItems field from n. If
+// RejectedItems is negative, n is returned. If RejectedItems is greater than
+// n, 0 is returned.
+func successful(n int64, err error) int64 {
+	if err == nil {
+		return n // All spans successfully exported.
+	}
+	// Split rejection calculation so successful is inlinable.
+	return n - rejected(n, err)
+}
+
+var errPartialPool = &sync.Pool{
+	New: func() any { return new(internal.PartialSuccess) },
+}
+
+// rejected returns how many out of the n spans exporter were rejected based on
+// the provided non-nil err.
+func rejected(n int64, err error) int64 {
+	ps := errPartialPool.Get().(*internal.PartialSuccess)
+	defer errPartialPool.Put(ps)
+	// Check for partial success.
+	if errors.As(err, ps) {
+		// Bound RejectedItems to [0, n]. This should not be needed,
+		// but be defensive as this is from an external source.
+		return min(max(ps.RejectedItems, 0), n)
+	}
+	return n // All spans rejected.
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ/target.go

@@ -0,0 +1,143 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/observ/target.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package observ // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ"
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"net/netip"
+	"strconv"
+	"strings"
+)
+
+const (
+	schemeUnix         = "unix"
+	schemeUnixAbstract = "unix-abstract"
+)
+
+// ParseCanonicalTarget parses a target string and returns the extracted host
+// (domain address or IP), the target port, or an error.
+//
+// If no port is specified, -1 is returned.
+//
+// If no host is specified, an empty string is returned.
+//
+// The target string is expected to always have the form
+// "<scheme>://[authority]/<endpoint>". For example:
+//   - "dns:///example.com:42"
+//   - "dns://8.8.8.8/example.com:42"
+//   - "unix:///path/to/socket"
+//   - "unix-abstract:///socket-name"
+//   - "passthrough:///192.34.2.1:42"
+//
+// The target is expected to come from the CanonicalTarget method of a gRPC
+// Client.
+func ParseCanonicalTarget(target string) (string, int, error) {
+	const sep = "://"
+
+	// Find scheme. Do not allocate the string by using url.Parse.
+	idx := strings.Index(target, sep)
+	if idx == -1 {
+		return "", -1, fmt.Errorf("invalid target %q: missing scheme", target)
+	}
+	scheme, endpoint := target[:idx], target[idx+len(sep):]
+
+	// Check for unix schemes.
+	if scheme == schemeUnix || scheme == schemeUnixAbstract {
+		return parseUnix(endpoint)
+	}
+
+	// Strip leading slash and any authority.
+	if i := strings.Index(endpoint, "/"); i != -1 {
+		endpoint = endpoint[i+1:]
+	}
+
+	// DNS, passthrough, and custom resolvers.
+	return parseEndpoint(endpoint)
+}
+
+// parseUnix parses unix socket targets.
+func parseUnix(endpoint string) (string, int, error) {
+	// Format: unix[-abstract]://path
+	//
+	// We should have "/path" (empty authority) if valid.
+	if len(endpoint) >= 1 && endpoint[0] == '/' {
+		// Return the full path including leading slash.
+		return endpoint, -1, nil
+	}
+
+	// If there's no leading slash, it means there might be an authority
+	// Check for authority case (should error): "authority/path"
+	if slashIdx := strings.Index(endpoint, "/"); slashIdx > 0 {
+		return "", -1, fmt.Errorf("invalid (non-empty) authority: %s", endpoint[:slashIdx])
+	}
+
+	return "", -1, errors.New("invalid unix target format")
+}
+
+// parseEndpoint parses an endpoint from a gRPC target.
+//
+// It supports the following formats:
+//   - "host"
+//   - "host%zone"
+//   - "host:port"
+//   - "host%zone:port"
+//   - "ipv4"
+//   - "ipv4%zone"
+//   - "ipv4:port"
+//   - "ipv4%zone:port"
+//   - "ipv6"
+//   - "ipv6%zone"
+//   - "[ipv6]"
+//   - "[ipv6%zone]"
+//   - "[ipv6]:port"
+//   - "[ipv6%zone]:port"
+//
+// It returns the host or host%zone (domain address or IP), the port (or -1 if
+// not specified), or an error if the input is not a valid.
+func parseEndpoint(endpoint string) (string, int, error) {
+	// First check if the endpoint is just an IP address.
+	if ip := parseIP(endpoint); ip != "" {
+		return ip, -1, nil
+	}
+
+	// If there's no colon, there is no port (IPv6 with no port checked above).
+	if !strings.Contains(endpoint, ":") {
+		return endpoint, -1, nil
+	}
+
+	host, portStr, err := net.SplitHostPort(endpoint)
+	if err != nil {
+		return "", -1, fmt.Errorf("invalid host:port %q: %w", endpoint, err)
+	}
+
+	const base, bitSize = 10, 16
+	port16, err := strconv.ParseUint(portStr, base, bitSize)
+	if err != nil {
+		return "", -1, fmt.Errorf("invalid port %q: %w", portStr, err)
+	}
+	port := int(port16) // port is guaranteed to be in the range [0, 65535].
+
+	return host, port, nil
+}
+
+// parseIP attempts to parse the entire endpoint as an IP address.
+// It returns the normalized string form of the IP if successful,
+// or an empty string if parsing fails.
+func parseIP(ip string) string {
+	// Strip leading and trailing brackets for IPv6 addresses.
+	if len(ip) >= 2 && ip[0] == '[' && ip[len(ip)-1] == ']' {
+		ip = ip[1 : len(ip)-1]
+	}
+	addr, err := netip.ParseAddr(ip)
+	if err != nil {
+		return ""
+	}
+	// Return the normalized string form of the IP.
+	return addr.String()
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/envconfig.go

@@ -0,0 +1,150 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlptrace/otlpconfig/envconfig.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"net/url"
+	"os"
+	"path"
+	"strings"
+	"time"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig"
+)
+
+// DefaultEnvOptionsReader is the default environments reader.
+var DefaultEnvOptionsReader = envconfig.EnvOptionsReader{
+	GetEnv:    os.Getenv,
+	ReadFile:  os.ReadFile,
+	Namespace: "OTEL_EXPORTER_OTLP",
+}
+
+// ApplyGRPCEnvConfigs applies the env configurations for gRPC.
+func ApplyGRPCEnvConfigs(cfg Config) Config {
+	opts := getOptionsFromEnv()
+	for _, opt := range opts {
+		cfg = opt.ApplyGRPCOption(cfg)
+	}
+	return cfg
+}
+
+// ApplyHTTPEnvConfigs applies the env configurations for HTTP.
+func ApplyHTTPEnvConfigs(cfg Config) Config {
+	opts := getOptionsFromEnv()
+	for _, opt := range opts {
+		cfg = opt.ApplyHTTPOption(cfg)
+	}
+	return cfg
+}
+
+func getOptionsFromEnv() []GenericOption {
+	opts := []GenericOption{}
+
+	tlsConf := &tls.Config{}
+	DefaultEnvOptionsReader.Apply(
+		envconfig.WithURL("ENDPOINT", func(u *url.URL) {
+			opts = append(opts, withEndpointScheme(u))
+			opts = append(opts, newSplitOption(func(cfg Config) Config {
+				cfg.Traces.Endpoint = u.Host
+				// For OTLP/HTTP endpoint URLs without a per-signal
+				// configuration, the passed endpoint is used as a base URL
+				// and the signals are sent to these paths relative to that.
+				cfg.Traces.URLPath = path.Join(u.Path, DefaultTracesPath)
+				return cfg
+			}, withEndpointForGRPC(u)))
+		}),
+		envconfig.WithURL("TRACES_ENDPOINT", func(u *url.URL) {
+			opts = append(opts, withEndpointScheme(u))
+			opts = append(opts, newSplitOption(func(cfg Config) Config {
+				cfg.Traces.Endpoint = u.Host
+				// For endpoint URLs for OTLP/HTTP per-signal variables, the
+				// URL MUST be used as-is without any modification. The only
+				// exception is that if an URL contains no path part, the root
+				// path / MUST be used.
+				path := u.Path
+				if path == "" {
+					path = "/"
+				}
+				cfg.Traces.URLPath = path
+				return cfg
+			}, withEndpointForGRPC(u)))
+		}),
+		envconfig.WithCertPool("CERTIFICATE", func(p *x509.CertPool) { tlsConf.RootCAs = p }),
+		envconfig.WithCertPool("TRACES_CERTIFICATE", func(p *x509.CertPool) { tlsConf.RootCAs = p }),
+		envconfig.WithClientCert(
+			"CLIENT_CERTIFICATE",
+			"CLIENT_KEY",
+			func(c tls.Certificate) { tlsConf.Certificates = []tls.Certificate{c} },
+		),
+		envconfig.WithClientCert(
+			"TRACES_CLIENT_CERTIFICATE",
+			"TRACES_CLIENT_KEY",
+			func(c tls.Certificate) { tlsConf.Certificates = []tls.Certificate{c} },
+		),
+		withTLSConfig(tlsConf, func(c *tls.Config) { opts = append(opts, WithTLSClientConfig(c)) }),
+		envconfig.WithBool("INSECURE", func(b bool) { opts = append(opts, withInsecure(b)) }),
+		envconfig.WithBool("TRACES_INSECURE", func(b bool) { opts = append(opts, withInsecure(b)) }),
+		envconfig.WithHeaders("HEADERS", func(h map[string]string) { opts = append(opts, WithHeaders(h)) }),
+		envconfig.WithHeaders("TRACES_HEADERS", func(h map[string]string) { opts = append(opts, WithHeaders(h)) }),
+		WithEnvCompression("COMPRESSION", func(c Compression) { opts = append(opts, WithCompression(c)) }),
+		WithEnvCompression("TRACES_COMPRESSION", func(c Compression) { opts = append(opts, WithCompression(c)) }),
+		envconfig.WithDuration("TIMEOUT", func(d time.Duration) { opts = append(opts, WithTimeout(d)) }),
+		envconfig.WithDuration("TRACES_TIMEOUT", func(d time.Duration) { opts = append(opts, WithTimeout(d)) }),
+	)
+
+	return opts
+}
+
+func withEndpointScheme(u *url.URL) GenericOption {
+	switch strings.ToLower(u.Scheme) {
+	case "http", "unix":
+		return WithInsecure()
+	default:
+		return WithSecure()
+	}
+}
+
+func withEndpointForGRPC(u *url.URL) func(cfg Config) Config {
+	return func(cfg Config) Config {
+		// For OTLP/gRPC endpoints, this is the target to which the
+		// exporter is going to send telemetry.
+		cfg.Traces.Endpoint = path.Join(u.Host, u.Path)
+		return cfg
+	}
+}
+
+// WithEnvCompression retrieves the specified config and passes it to ConfigFn as a Compression.
+func WithEnvCompression(n string, fn func(Compression)) func(e *envconfig.EnvOptionsReader) {
+	return func(e *envconfig.EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			cp := NoCompression
+			if v == "gzip" {
+				cp = GzipCompression
+			}
+
+			fn(cp)
+		}
+	}
+}
+
+// revive:disable-next-line:flag-parameter
+func withInsecure(b bool) GenericOption {
+	if b {
+		return WithInsecure()
+	}
+	return WithSecure()
+}
+
+func withTLSConfig(c *tls.Config, fn func(*tls.Config)) func(e *envconfig.EnvOptionsReader) {
+	return func(e *envconfig.EnvOptionsReader) {
+		if c.RootCAs != nil || len(c.Certificates) > 0 {
+			fn(c)
+		}
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/options.go

@@ -0,0 +1,360 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlptrace/otlpconfig/options.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package otlpconfig provides configuration for the otlptrace exporters.
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net/http"
+	"net/url"
+	"path"
+	"strings"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/backoff"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/encoding/gzip"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/retry"
+	"go.opentelemetry.io/otel/internal/global"
+)
+
+const (
+	// DefaultTracesPath is a default URL path for endpoint that
+	// receives spans.
+	DefaultTracesPath string = "/v1/traces"
+	// DefaultTimeout is a default max waiting time for the backend to process
+	// each span batch.
+	DefaultTimeout time.Duration = 10 * time.Second
+)
+
+type (
+	// HTTPTransportProxyFunc is a function that resolves which URL to use as proxy for a given request.
+	// This type is compatible with `http.Transport.Proxy` and can be used to set a custom proxy function to the OTLP HTTP client.
+	HTTPTransportProxyFunc func(*http.Request) (*url.URL, error)
+
+	SignalConfig struct {
+		Endpoint    string
+		Insecure    bool
+		TLSCfg      *tls.Config
+		Headers     map[string]string
+		Compression Compression
+		Timeout     time.Duration
+		URLPath     string
+
+		// gRPC configurations
+		GRPCCredentials credentials.TransportCredentials
+
+		// HTTP configurations
+		Proxy      HTTPTransportProxyFunc
+		HTTPClient *http.Client
+	}
+
+	Config struct {
+		// Signal specific configurations
+		Traces SignalConfig
+
+		RetryConfig retry.Config
+
+		// gRPC configurations
+		ReconnectionPeriod time.Duration
+		ServiceConfig      string
+		DialOptions        []grpc.DialOption
+		GRPCConn           *grpc.ClientConn
+	}
+)
+
+// NewHTTPConfig returns a new Config with all settings applied from opts and
+// any unset setting using the default HTTP config values.
+func NewHTTPConfig(opts ...HTTPOption) Config {
+	cfg := Config{
+		Traces: SignalConfig{
+			Endpoint:    fmt.Sprintf("%s:%d", DefaultCollectorHost, DefaultCollectorHTTPPort),
+			URLPath:     DefaultTracesPath,
+			Compression: NoCompression,
+			Timeout:     DefaultTimeout,
+		},
+		RetryConfig: retry.DefaultConfig,
+	}
+	cfg = ApplyHTTPEnvConfigs(cfg)
+	for _, opt := range opts {
+		cfg = opt.ApplyHTTPOption(cfg)
+	}
+	cfg.Traces.URLPath = cleanPath(cfg.Traces.URLPath, DefaultTracesPath)
+	return cfg
+}
+
+// cleanPath returns a path with all spaces trimmed. If urlPath is empty,
+// defaultPath is returned instead.
+func cleanPath(urlPath string, defaultPath string) string {
+	tmp := strings.TrimSpace(urlPath)
+	if tmp == "" || tmp == "." {
+		return defaultPath
+	}
+	if !path.IsAbs(tmp) {
+		tmp = "/" + tmp
+	}
+	return tmp
+}
+
+// NewGRPCConfig returns a new Config with all settings applied from opts and
+// any unset setting using the default gRPC config values.
+func NewGRPCConfig(opts ...GRPCOption) Config {
+	userAgent := "OTel OTLP Exporter Go/" + otlptrace.Version()
+	cfg := Config{
+		Traces: SignalConfig{
+			Endpoint:    fmt.Sprintf("%s:%d", DefaultCollectorHost, DefaultCollectorGRPCPort),
+			URLPath:     DefaultTracesPath,
+			Compression: NoCompression,
+			Timeout:     DefaultTimeout,
+		},
+		RetryConfig: retry.DefaultConfig,
+		DialOptions: []grpc.DialOption{grpc.WithUserAgent(userAgent)},
+	}
+	cfg = ApplyGRPCEnvConfigs(cfg)
+	for _, opt := range opts {
+		cfg = opt.ApplyGRPCOption(cfg)
+	}
+
+	if cfg.ServiceConfig != "" {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithDefaultServiceConfig(cfg.ServiceConfig))
+	}
+	// Prioritize GRPCCredentials over Insecure (passing both is an error).
+	if cfg.Traces.GRPCCredentials != nil {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(cfg.Traces.GRPCCredentials))
+	} else if cfg.Traces.Insecure {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	} else {
+		// Default to using the host's root CA.
+		creds := credentials.NewTLS(nil)
+		cfg.Traces.GRPCCredentials = creds
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(creds))
+	}
+	if cfg.Traces.Compression == GzipCompression {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithDefaultCallOptions(grpc.UseCompressor(gzip.Name)))
+	}
+	if cfg.ReconnectionPeriod != 0 {
+		p := grpc.ConnectParams{
+			Backoff:           backoff.DefaultConfig,
+			MinConnectTimeout: cfg.ReconnectionPeriod,
+		}
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithConnectParams(p))
+	}
+
+	return cfg
+}
+
+type (
+	// GenericOption applies an option to the HTTP or gRPC driver.
+	GenericOption interface {
+		ApplyHTTPOption(Config) Config
+		ApplyGRPCOption(Config) Config
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+
+	// HTTPOption applies an option to the HTTP driver.
+	HTTPOption interface {
+		ApplyHTTPOption(Config) Config
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+
+	// GRPCOption applies an option to the gRPC driver.
+	GRPCOption interface {
+		ApplyGRPCOption(Config) Config
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+)
+
+// genericOption is an option that applies the same logic
+// for both gRPC and HTTP.
+type genericOption struct {
+	fn func(Config) Config
+}
+
+func (g *genericOption) ApplyGRPCOption(cfg Config) Config {
+	return g.fn(cfg)
+}
+
+func (g *genericOption) ApplyHTTPOption(cfg Config) Config {
+	return g.fn(cfg)
+}
+
+func (genericOption) private() {}
+
+func newGenericOption(fn func(cfg Config) Config) GenericOption {
+	return &genericOption{fn: fn}
+}
+
+// splitOption is an option that applies different logics
+// for gRPC and HTTP.
+type splitOption struct {
+	httpFn func(Config) Config
+	grpcFn func(Config) Config
+}
+
+func (g *splitOption) ApplyGRPCOption(cfg Config) Config {
+	return g.grpcFn(cfg)
+}
+
+func (g *splitOption) ApplyHTTPOption(cfg Config) Config {
+	return g.httpFn(cfg)
+}
+
+func (splitOption) private() {}
+
+func newSplitOption(httpFn func(cfg Config) Config, grpcFn func(cfg Config) Config) GenericOption {
+	return &splitOption{httpFn: httpFn, grpcFn: grpcFn}
+}
+
+// httpOption is an option that is only applied to the HTTP driver.
+type httpOption struct {
+	fn func(Config) Config
+}
+
+func (h *httpOption) ApplyHTTPOption(cfg Config) Config {
+	return h.fn(cfg)
+}
+
+func (httpOption) private() {}
+
+func NewHTTPOption(fn func(cfg Config) Config) HTTPOption {
+	return &httpOption{fn: fn}
+}
+
+// grpcOption is an option that is only applied to the gRPC driver.
+type grpcOption struct {
+	fn func(Config) Config
+}
+
+func (h *grpcOption) ApplyGRPCOption(cfg Config) Config {
+	return h.fn(cfg)
+}
+
+func (grpcOption) private() {}
+
+func NewGRPCOption(fn func(cfg Config) Config) GRPCOption {
+	return &grpcOption{fn: fn}
+}
+
+// Generic Options
+
+// WithEndpoint configures the trace host and port only; endpoint should
+// resemble "example.com" or "localhost:4317". To configure the scheme and path,
+// use WithEndpointURL.
+func WithEndpoint(endpoint string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Endpoint = endpoint
+		return cfg
+	})
+}
+
+// WithEndpointURL configures the trace scheme, host, port, and path; the
+// provided value should resemble "https://example.com:4318/v1/traces".
+func WithEndpointURL(v string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		u, err := url.Parse(v)
+		if err != nil {
+			global.Error(err, "otlptrace: parse endpoint url", "url", v)
+			return cfg
+		}
+
+		cfg.Traces.Endpoint = u.Host
+		cfg.Traces.URLPath = u.Path
+		cfg.Traces.Insecure = u.Scheme != "https"
+
+		return cfg
+	})
+}
+
+func WithCompression(compression Compression) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Compression = compression
+		return cfg
+	})
+}
+
+func WithURLPath(urlPath string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.URLPath = urlPath
+		return cfg
+	})
+}
+
+func WithRetry(rc retry.Config) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.RetryConfig = rc
+		return cfg
+	})
+}
+
+func WithTLSClientConfig(tlsCfg *tls.Config) GenericOption {
+	return newSplitOption(func(cfg Config) Config {
+		cfg.Traces.TLSCfg = tlsCfg.Clone()
+		return cfg
+	}, func(cfg Config) Config {
+		cfg.Traces.GRPCCredentials = credentials.NewTLS(tlsCfg)
+		return cfg
+	})
+}
+
+func WithInsecure() GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Insecure = true
+		return cfg
+	})
+}
+
+func WithSecure() GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Insecure = false
+		return cfg
+	})
+}
+
+func WithHeaders(headers map[string]string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Headers = headers
+		return cfg
+	})
+}
+
+func WithTimeout(duration time.Duration) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Timeout = duration
+		return cfg
+	})
+}
+
+func WithProxy(pf HTTPTransportProxyFunc) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.Proxy = pf
+		return cfg
+	})
+}
+
+func WithHTTPClient(c *http.Client) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Traces.HTTPClient = c
+		return cfg
+	})
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/optiontypes.go

@@ -0,0 +1,40 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlptrace/otlpconfig/optiontypes.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
+
+const (
+	// DefaultCollectorGRPCPort is the default gRPC port of the collector.
+	DefaultCollectorGRPCPort uint16 = 4317
+	// DefaultCollectorHTTPPort is the default HTTP port of the collector.
+	DefaultCollectorHTTPPort uint16 = 4318
+	// DefaultCollectorHost is the host address the Exporter will attempt
+	// connect to if no collector address is provided.
+	DefaultCollectorHost string = "localhost"
+)
+
+// Compression describes the compression used for payloads sent to the
+// collector.
+type Compression int
+
+const (
+	// NoCompression tells the driver to send payloads without
+	// compression.
+	NoCompression Compression = iota
+	// GzipCompression tells the driver to send payloads after
+	// compressing them with gzip.
+	GzipCompression
+)
+
+// Marshaler describes the kind of message format sent to the collector.
+type Marshaler int
+
+const (
+	// MarshalProto tells the driver to send using the protobuf binary format.
+	MarshalProto Marshaler = iota
+	// MarshalJSON tells the driver to send using json format.
+	MarshalJSON
+)

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig/tls.go

@@ -0,0 +1,26 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlptrace/otlpconfig/tls.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlpconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+)
+
+// CreateTLSConfig creates a tls.Config from a raw certificate bytes
+// to verify a server certificate.
+func CreateTLSConfig(certBytes []byte) (*tls.Config, error) {
+	cp := x509.NewCertPool()
+	if ok := cp.AppendCertsFromPEM(certBytes); !ok {
+		return nil, errors.New("failed to append certificate to the cert pool")
+	}
+
+	return &tls.Config{
+		RootCAs: cp,
+	}, nil
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/partialsuccess.go

@@ -0,0 +1,67 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/partialsuccess.go
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
+
+import "fmt"
+
+// PartialSuccess represents the underlying error for all handling
+// OTLP partial success messages.  Use `errors.Is(err,
+// PartialSuccess{})` to test whether an error passed to the OTel
+// error handler belongs to this category.
+type PartialSuccess struct {
+	ErrorMessage  string
+	RejectedItems int64
+	RejectedKind  string
+}
+
+var _ error = PartialSuccess{}
+
+// Error implements the error interface.
+func (ps PartialSuccess) Error() string {
+	msg := ps.ErrorMessage
+	if msg == "" {
+		msg = "empty message"
+	}
+	return fmt.Sprintf("OTLP partial success: %s (%d %s rejected)", msg, ps.RejectedItems, ps.RejectedKind)
+}
+
+// As returns true if ps can be assigned to target and makes the assignment.
+// Otherwise, it returns false. This supports the errors.As() interface.
+func (ps PartialSuccess) As(target any) bool {
+	t, ok := target.(*PartialSuccess)
+	if !ok {
+		return false
+	}
+	*t = ps
+	return true
+}
+
+// Is supports the errors.Is() interface.
+func (ps PartialSuccess) Is(err error) bool {
+	_, ok := err.(PartialSuccess)
+	return ok
+}
+
+// TracePartialSuccessError returns an error describing a partial success
+// response for the trace signal.
+func TracePartialSuccessError(itemsRejected int64, errorMessage string) error {
+	return PartialSuccess{
+		ErrorMessage:  errorMessage,
+		RejectedItems: itemsRejected,
+		RejectedKind:  "spans",
+	}
+}
+
+// MetricPartialSuccessError returns an error describing a partial success
+// response for the metric signal.
+func MetricPartialSuccessError(itemsRejected int64, errorMessage string) error {
+	return PartialSuccess{
+		ErrorMessage:  errorMessage,
+		RejectedItems: itemsRejected,
+		RejectedKind:  "metric data points",
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/retry/retry.go

@@ -0,0 +1,146 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/retry/retry.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package retry provides request retry functionality that can perform
+// configurable exponential backoff for transient errors and honor any
+// explicit throttle responses received.
+package retry // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/retry"
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/cenkalti/backoff/v5"
+)
+
+// DefaultConfig are the recommended defaults to use.
+var DefaultConfig = Config{
+	Enabled:         true,
+	InitialInterval: 5 * time.Second,
+	MaxInterval:     30 * time.Second,
+	MaxElapsedTime:  time.Minute,
+}
+
+// Config defines configuration for retrying batches in case of export failure
+// using an exponential backoff.
+type Config struct {
+	// Enabled indicates whether to not retry sending batches in case of
+	// export failure.
+	Enabled bool
+	// InitialInterval the time to wait after the first failure before
+	// retrying.
+	InitialInterval time.Duration
+	// MaxInterval is the upper bound on backoff interval. Once this value is
+	// reached the delay between consecutive retries will always be
+	// `MaxInterval`.
+	MaxInterval time.Duration
+	// MaxElapsedTime is the maximum amount of time (including retries) spent
+	// trying to send a request/batch.  Once this value is reached, the data
+	// is discarded.
+	MaxElapsedTime time.Duration
+}
+
+// RequestFunc wraps a request with retry logic.
+type RequestFunc func(context.Context, func(context.Context) error) error
+
+// EvaluateFunc returns if an error is retry-able and if an explicit throttle
+// duration should be honored that was included in the error.
+//
+// The function must return true if the error argument is retry-able,
+// otherwise it must return false for the first return parameter.
+//
+// The function must return a non-zero time.Duration if the error contains
+// explicit throttle duration that should be honored, otherwise it must return
+// a zero valued time.Duration.
+type EvaluateFunc func(error) (bool, time.Duration)
+
+// RequestFunc returns a RequestFunc using the evaluate function to determine
+// if requests can be retried and based on the exponential backoff
+// configuration of c.
+func (c Config) RequestFunc(evaluate EvaluateFunc) RequestFunc {
+	if !c.Enabled {
+		return func(ctx context.Context, fn func(context.Context) error) error {
+			return fn(ctx)
+		}
+	}
+
+	return func(ctx context.Context, fn func(context.Context) error) error {
+		// Do not use NewExponentialBackOff since it calls Reset and the code here
+		// must call Reset after changing the InitialInterval (this saves an
+		// unnecessary call to Now).
+		b := &backoff.ExponentialBackOff{
+			InitialInterval:     c.InitialInterval,
+			RandomizationFactor: backoff.DefaultRandomizationFactor,
+			Multiplier:          backoff.DefaultMultiplier,
+			MaxInterval:         c.MaxInterval,
+		}
+		b.Reset()
+
+		maxElapsedTime := c.MaxElapsedTime
+		startTime := time.Now()
+
+		for {
+			err := fn(ctx)
+			if err == nil {
+				return nil
+			}
+
+			retryable, throttle := evaluate(err)
+			if !retryable {
+				return err
+			}
+
+			// Check if context is canceled before attempting to wait and retry.
+			if ctx.Err() != nil {
+				return fmt.Errorf("%w: %w", ctx.Err(), err)
+			}
+
+			if maxElapsedTime != 0 && time.Since(startTime) > maxElapsedTime {
+				return fmt.Errorf("max retry time elapsed: %w", err)
+			}
+
+			// Wait for the greater of the backoff or throttle delay.
+			bOff := b.NextBackOff()
+			delay := max(throttle, bOff)
+
+			elapsed := time.Since(startTime)
+			if maxElapsedTime != 0 && elapsed+throttle > maxElapsedTime {
+				return fmt.Errorf("max retry time would elapse: %w", err)
+			}
+
+			if ctxErr := waitFunc(ctx, delay); ctxErr != nil {
+				return fmt.Errorf("%w: %w", ctxErr, err)
+			}
+		}
+	}
+}
+
+// Allow override for testing.
+var waitFunc = wait
+
+// wait takes the caller's context, and the amount of time to wait.  It will
+// return nil if the timer fires before or at the same time as the context's
+// deadline.  This indicates that the call can be retried.
+func wait(ctx context.Context, delay time.Duration) error {
+	timer := time.NewTimer(delay)
+	defer timer.Stop()
+
+	select {
+	case <-ctx.Done():
+		// Handle the case where the timer and context deadline end
+		// simultaneously by prioritizing the timer expiration nil value
+		// response.
+		select {
+		case <-timer.C:
+		default:
+			return context.Cause(ctx)
+		}
+	case <-timer.C:
+	}
+
+	return nil
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/version.go

@@ -0,0 +1,8 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal"
+
+// Version is the current release version of the OpenTelemetry OTLP gRPC trace
+// exporter in use.
+const Version = "1.43.0"

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/x/README.md

@@ -0,0 +1,36 @@
+# Experimental Features
+
+The `otlptracegrpc` exporter contains features that have not yet stabilized in the OpenTelemetry specification.
+These features are added to the `otlptracegrpc` exporter prior to stabilization in the specification so that users can start experimenting with them and provide feedback.
+
+These feature may change in backwards incompatible ways as feedback is applied.
+See the [Compatibility and Stability](#compatibility-and-stability) section for more information.
+
+## Features
+
+- [Observability](#observability)
+
+### Observability
+
+The `otlptracegrpc` exporter provides a observability feature that allows you to monitor the SDK itself.
+
+To opt-in, set the environment variable `OTEL_GO_X_OBSERVABILITY` to `true`.
+
+When enabled, the SDK will create the following metrics using the global `MeterProvider`:
+
+- `otel.sdk.exporter.span.inflight`
+- `otel.sdk.exporter.span.exported`
+- `otel.sdk.exporter.operation.duration`
+
+Please see the [Semantic conventions for OpenTelemetry SDK metrics] documentation for more details on these metrics.
+
+[Semantic conventions for OpenTelemetry SDK metrics]: https://github.com/open-telemetry/semantic-conventions/blob/v1.37.0/docs/otel/sdk-metrics.md
+
+## Compatibility and Stability
+
+Experimental features do not fall within the scope of the OpenTelemetry Go versioning and stability [policy](../../../../../../VERSIONING.md).
+These features may be removed or modified in successive version releases, including patch versions.
+
+When an experimental feature is promoted to a stable feature, a migration path will be included in the changelog entry of the release.
+There is no guarantee that any environment variable feature flags that enabled the experimental feature will be supported by the stable version.
+If they are supported, they may be accompanied with a deprecation notice stating a timeline for the removal of that support.

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/x/observ.go

@@ -0,0 +1,22 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package x // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/x"
+
+import "strings"
+
+// Observability is an experimental feature flag that determines if exporter
+// observability metrics are enabled.
+//
+// To enable this feature set the OTEL_GO_X_OBSERVABILITY environment variable
+// to the case-insensitive string value of "true" (i.e. "True" and "TRUE"
+// will also enable this).
+var Observability = newFeature(
+	[]string{"OBSERVABILITY"},
+	func(v string) (string, bool) {
+		if strings.EqualFold(v, "true") {
+			return v, true
+		}
+		return "", false
+	},
+)

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/x/x.go

@@ -0,0 +1,58 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/x/x.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package x documents experimental features for [go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc].
+package x // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/x"
+
+import (
+	"os"
+)
+
+// Feature is an experimental feature control flag. It provides a uniform way
+// to interact with these feature flags and parse their values.
+type Feature[T any] struct {
+	keys  []string
+	parse func(v string) (T, bool)
+}
+
+func newFeature[T any](suffix []string, parse func(string) (T, bool)) Feature[T] {
+	const envKeyRoot = "OTEL_GO_X_"
+	keys := make([]string, 0, len(suffix))
+	for _, s := range suffix {
+		keys = append(keys, envKeyRoot+s)
+	}
+	return Feature[T]{
+		keys:  keys,
+		parse: parse,
+	}
+}
+
+// Keys returns the environment variable keys that can be set to enable the
+// feature.
+func (f Feature[T]) Keys() []string { return f.keys }
+
+// Lookup returns the user configured value for the feature and true if the
+// user has enabled the feature. Otherwise, if the feature is not enabled, a
+// zero-value and false are returned.
+func (f Feature[T]) Lookup() (v T, ok bool) {
+	// https://github.com/open-telemetry/opentelemetry-specification/blob/62effed618589a0bec416a87e559c0a9d96289bb/specification/configuration/sdk-environment-variables.md#parsing-empty-value
+	//
+	// > The SDK MUST interpret an empty value of an environment variable the
+	// > same way as when the variable is unset.
+	for _, key := range f.keys {
+		vRaw := os.Getenv(key)
+		if vRaw != "" {
+			return f.parse(vRaw)
+		}
+	}
+	return v, ok
+}
+
+// Enabled reports whether the feature is enabled.
+func (f Feature[T]) Enabled() bool {
+	_, ok := f.Lookup()
+	return ok
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/options.go

@@ -0,0 +1,211 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlptracegrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+
+import (
+	"fmt"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/otlpconfig"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/retry"
+)
+
+// Option applies an option to the gRPC driver.
+type Option interface {
+	applyGRPCOption(otlpconfig.Config) otlpconfig.Config
+}
+
+func asGRPCOptions(opts []Option) []otlpconfig.GRPCOption {
+	converted := make([]otlpconfig.GRPCOption, len(opts))
+	for i, o := range opts {
+		converted[i] = otlpconfig.NewGRPCOption(o.applyGRPCOption)
+	}
+	return converted
+}
+
+// RetryConfig defines configuration for retrying export of span batches that
+// failed to be received by the target endpoint.
+//
+// This configuration does not define any network retry strategy. That is
+// entirely handled by the gRPC ClientConn.
+type RetryConfig retry.Config
+
+type wrappedOption struct {
+	otlpconfig.GRPCOption
+}
+
+func (w wrappedOption) applyGRPCOption(cfg otlpconfig.Config) otlpconfig.Config {
+	return w.ApplyGRPCOption(cfg)
+}
+
+// WithInsecure disables client transport security for the exporter's gRPC
+// connection just like grpc.WithInsecure()
+// (https://pkg.go.dev/google.golang.org/grpc#WithInsecure) does. Note, by
+// default, client security is required unless WithInsecure is used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithInsecure() Option {
+	return wrappedOption{otlpconfig.WithInsecure()}
+}
+
+// WithEndpoint sets the target endpoint (host and port) the Exporter will
+// connect to. The provided endpoint should resemble "example.com:4317" (no
+// scheme or path).
+//
+// If the OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
+// environment variable is set, and this option is not passed, that variable
+// value will be used. If both environment variables are set,
+// OTEL_EXPORTER_OTLP_TRACES_ENDPOINT will take precedence. If an environment
+// variable is set, and this option is passed, this option will take precedence.
+//
+// If both this option and WithEndpointURL are used, the last used option will
+// take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, "localhost:4317" will be used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithEndpoint(endpoint string) Option {
+	return wrappedOption{otlpconfig.WithEndpoint(endpoint)}
+}
+
+// WithEndpointURL sets the target endpoint URL (scheme, host, port, path)
+// the Exporter will connect to. The provided endpoint URL should resemble
+// "https://example.com:4318/v1/traces".
+//
+// If the OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
+// environment variable is set, and this option is not passed, that variable
+// value will be used. If both environment variables are set,
+// OTEL_EXPORTER_OTLP_TRACES_ENDPOINT will take precedence. If an environment
+// variable is set, and this option is passed, this option will take precedence.
+//
+// If both this option and WithEndpoint are used, the last used option will
+// take precedence.
+//
+// If an invalid URL is provided, the default value will be kept.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, "https://localhost:4317/v1/traces" will be used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithEndpointURL(u string) Option {
+	return wrappedOption{otlpconfig.WithEndpointURL(u)}
+}
+
+// WithReconnectionPeriod set the minimum amount of time between connection
+// attempts to the target endpoint.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithReconnectionPeriod(rp time.Duration) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg otlpconfig.Config) otlpconfig.Config {
+		cfg.ReconnectionPeriod = rp
+		return cfg
+	})}
+}
+
+func compressorToCompression(compressor string) otlpconfig.Compression {
+	if compressor == "gzip" {
+		return otlpconfig.GzipCompression
+	}
+
+	otel.Handle(fmt.Errorf("invalid compression type: '%s', using no compression as default", compressor))
+	return otlpconfig.NoCompression
+}
+
+// WithCompressor sets the compressor for the gRPC client to use when sending
+// requests. Supported compressor values: "gzip".
+func WithCompressor(compressor string) Option {
+	return wrappedOption{otlpconfig.WithCompression(compressorToCompression(compressor))}
+}
+
+// WithHeaders will send the provided headers with each gRPC requests.
+func WithHeaders(headers map[string]string) Option {
+	return wrappedOption{otlpconfig.WithHeaders(headers)}
+}
+
+// WithTLSCredentials allows the connection to use TLS credentials when
+// talking to the server. It takes in grpc.TransportCredentials instead of say
+// a Certificate file or a tls.Certificate, because the retrieving of these
+// credentials can be done in many ways e.g. plain file, in code tls.Config or
+// by certificate rotation, so it is up to the caller to decide what to use.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithTLSCredentials(creds credentials.TransportCredentials) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg otlpconfig.Config) otlpconfig.Config {
+		cfg.Traces.GRPCCredentials = creds
+		return cfg
+	})}
+}
+
+// WithServiceConfig defines the default gRPC service config used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithServiceConfig(serviceConfig string) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg otlpconfig.Config) otlpconfig.Config {
+		cfg.ServiceConfig = serviceConfig
+		return cfg
+	})}
+}
+
+// WithDialOption sets explicit grpc.DialOptions to use when making a
+// connection. The options here are appended to the internal grpc.DialOptions
+// used so they will take precedence over any other internal grpc.DialOptions
+// they might conflict with.
+// The [grpc.WithBlock], [grpc.WithTimeout], and [grpc.WithReturnConnectionError]
+// grpc.DialOptions are ignored.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithDialOption(opts ...grpc.DialOption) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg otlpconfig.Config) otlpconfig.Config {
+		cfg.DialOptions = opts
+		return cfg
+	})}
+}
+
+// WithGRPCConn sets conn as the gRPC ClientConn used for all communication.
+//
+// This option takes precedence over any other option that relates to
+// establishing or persisting a gRPC connection to a target endpoint. Any
+// other option of those types passed will be ignored.
+//
+// It is the callers responsibility to close the passed conn. The client
+// Shutdown method will not close this connection.
+func WithGRPCConn(conn *grpc.ClientConn) Option {
+	return wrappedOption{otlpconfig.NewGRPCOption(func(cfg otlpconfig.Config) otlpconfig.Config {
+		cfg.GRPCConn = conn
+		return cfg
+	})}
+}
+
+// WithTimeout sets the max amount of time a client will attempt to export a
+// batch of spans. This takes precedence over any retry settings defined with
+// WithRetry, once this time limit has been reached the export is abandoned
+// and the batch of spans is dropped.
+//
+// If unset, the default timeout will be set to 10 seconds.
+func WithTimeout(duration time.Duration) Option {
+	return wrappedOption{otlpconfig.WithTimeout(duration)}
+}
+
+// WithRetry sets the retry policy for transient retryable errors that may be
+// returned by the target endpoint when exporting a batch of spans.
+//
+// If the target endpoint responds with not only a retryable error, but
+// explicitly returns a backoff time in the response. That time will take
+// precedence over these settings.
+//
+// These settings define the retry strategy implemented by the exporter.
+// These settings do not define any network retry strategy.
+// That is handled by the gRPC ClientConn.
+//
+// If unset, the default retry policy will be used. It will retry the export
+// 5 seconds after receiving a retryable error and increase exponentially
+// after each error for no more than a total time of 1 minute.
+func WithRetry(settings RetryConfig) Option {
+	return wrappedOption{otlpconfig.WithRetry(retry.Config(settings))}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/version.go

@@ -0,0 +1,9 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+// Version is the current release version of the OpenTelemetry OTLP trace exporter in use.
+func Version() string {
+	return "1.43.0"
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/LICENSE

@@ -0,0 +1,231 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          include a readable copy of the attribution notices contained
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   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.
+
+--------------------------------------------------------------------------------
+
+Copyright 2009 The Go Authors.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google LLC nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/README.md

@@ -0,0 +1,3 @@
+# STDOUT Trace Exporter
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/stdout/stdouttrace)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/stdout/stdouttrace)

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/config.go

@@ -0,0 +1,85 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
+
+import (
+	"io"
+	"os"
+)
+
+var (
+	defaultWriter      = os.Stdout
+	defaultPrettyPrint = false
+	defaultTimestamps  = true
+)
+
+// config contains options for the STDOUT exporter.
+type config struct {
+	// Writer is the destination.  If not set, os.Stdout is used.
+	Writer io.Writer
+
+	// PrettyPrint will encode the output into readable JSON. Default is
+	// false.
+	PrettyPrint bool
+
+	// Timestamps specifies if timestamps should be printed. Default is
+	// true.
+	Timestamps bool
+}
+
+// newConfig creates a validated Config configured with options.
+func newConfig(options ...Option) config {
+	cfg := config{
+		Writer:      defaultWriter,
+		PrettyPrint: defaultPrettyPrint,
+		Timestamps:  defaultTimestamps,
+	}
+	for _, opt := range options {
+		cfg = opt.apply(cfg)
+	}
+	return cfg
+}
+
+// Option sets the value of an option for a Config.
+type Option interface {
+	apply(config) config
+}
+
+// WithWriter sets the export stream destination.
+func WithWriter(w io.Writer) Option {
+	return writerOption{w}
+}
+
+type writerOption struct {
+	W io.Writer
+}
+
+func (o writerOption) apply(cfg config) config {
+	cfg.Writer = o.W
+	return cfg
+}
+
+// WithPrettyPrint prettifies the emitted output.
+func WithPrettyPrint() Option {
+	return prettyPrintOption(true)
+}
+
+type prettyPrintOption bool
+
+func (o prettyPrintOption) apply(cfg config) config {
+	cfg.PrettyPrint = bool(o)
+	return cfg
+}
+
+// WithoutTimestamps sets the export stream to not include timestamps.
+func WithoutTimestamps() Option {
+	return timestampsOption(false)
+}
+
+type timestampsOption bool
+
+func (o timestampsOption) apply(cfg config) config {
+	cfg.Timestamps = bool(o)
+	return cfg
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/doc.go

@@ -0,0 +1,9 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package stdouttrace contains an OpenTelemetry exporter for tracing
+// telemetry to be written to an output destination as JSON.
+//
+// See [go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x] for information about
+// the experimental features.
+package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter/counter.go

@@ -0,0 +1,31 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/counter/counter.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package counter provides a simple counter for generating unique IDs.
+//
+// This package is used to generate unique IDs while allowing testing packages
+// to reset the counter.
+package counter // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter"
+
+import "sync/atomic"
+
+// exporterN is a global 0-based count of the number of exporters created.
+var exporterN atomic.Int64
+
+// NextExporterID returns the next unique ID for an exporter.
+func NextExporterID() int64 {
+	const inc = 1
+	return exporterN.Add(inc) - inc
+}
+
+// SetExporterID sets the exporter ID counter to v and returns the previous
+// value.
+//
+// This function is useful for testing purposes, allowing you to reset the
+// counter. It should not be used in production code.
+func SetExporterID(v int64) int64 {
+	return exporterN.Swap(v)
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/gen.go

@@ -0,0 +1,12 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package internal provides internal functionality for the stdouttrace
+// package.
+package internal // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal"
+
+//go:generate gotmpl --body=../../../../internal/shared/counter/counter.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter\" }" --out=counter/counter.go
+//go:generate gotmpl --body=../../../../internal/shared/counter/counter_test.go.tmpl "--data={}" --out=counter/counter_test.go
+
+//go:generate gotmpl --body=../../../../internal/shared/x/x.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/stdout/stdouttrace\" }" --out=x/x.go
+//go:generate gotmpl --body=../../../../internal/shared/x/x_test.go.tmpl "--data={}" --out=x/x_test.go

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ/instrumentation.go

@@ -0,0 +1,230 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package observ provides experimental observability instrumentation
+// for the stdout trace exporter.
+package observ // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal"
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x"
+	"go.opentelemetry.io/otel/metric"
+	semconv "go.opentelemetry.io/otel/semconv/v1.40.0"
+	"go.opentelemetry.io/otel/semconv/v1.40.0/otelconv"
+)
+
+const (
+	// ComponentType uniquely identifies the OpenTelemetry Exporter component
+	// being instrumented.
+	//
+	// The STDOUT trace exporter is not a standardized OTel component type, so
+	// it uses the Go package prefixed type name to ensure uniqueness and
+	// identity.
+	ComponentType = "go.opentelemetry.io/otel/exporters/stdout/stdouttrace.Exporter"
+
+	// ScopeName is the unique name of the meter used for instrumentation.
+	ScopeName = "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ"
+
+	// SchemaURL is the schema URL of the metrics produced by this
+	// instrumentation.
+	SchemaURL = semconv.SchemaURL
+
+	// Version is the current version of this instrumentation.
+	//
+	// This matches the version of the exporter.
+	Version = internal.Version
+)
+
+var (
+	measureAttrsPool = &sync.Pool{
+		New: func() any {
+			// "component.name" + "component.type" + "error.type"
+			const n = 1 + 1 + 1
+			s := make([]attribute.KeyValue, 0, n)
+			// Return a pointer to a slice instead of a slice itself
+			// to avoid allocations on every call.
+			return &s
+		},
+	}
+
+	addOptPool = &sync.Pool{
+		New: func() any {
+			const n = 1 // WithAttributeSet
+			o := make([]metric.AddOption, 0, n)
+			return &o
+		},
+	}
+
+	recordOptPool = &sync.Pool{
+		New: func() any {
+			const n = 1 // WithAttributeSet
+			o := make([]metric.RecordOption, 0, n)
+			return &o
+		},
+	}
+)
+
+func get[T any](p *sync.Pool) *[]T { return p.Get().(*[]T) }
+
+func put[T any](p *sync.Pool, s *[]T) {
+	*s = (*s)[:0] // Reset.
+	p.Put(s)
+}
+
+func ComponentName(id int64) string {
+	return fmt.Sprintf("%s/%d", ComponentType, id)
+}
+
+// Instrumentation is experimental instrumentation for the exporter.
+type Instrumentation struct {
+	inflightSpans metric.Int64UpDownCounter
+	exportedSpans metric.Int64Counter
+	opDuration    metric.Float64Histogram
+
+	attrs  []attribute.KeyValue
+	setOpt metric.MeasurementOption
+}
+
+// NewInstrumentation returns instrumentation for a STDOUT trace exporter with
+// the provided ID using the global MeterProvider.
+//
+// If the experimental observability is disabled, nil is returned.
+func NewInstrumentation(id int64) (*Instrumentation, error) {
+	if !x.Observability.Enabled() {
+		return nil, nil
+	}
+
+	i := &Instrumentation{
+		attrs: []attribute.KeyValue{
+			semconv.OTelComponentName(ComponentName(id)),
+			semconv.OTelComponentTypeKey.String(ComponentType),
+		},
+	}
+
+	s := attribute.NewSet(i.attrs...)
+	i.setOpt = metric.WithAttributeSet(s)
+
+	mp := otel.GetMeterProvider()
+	m := mp.Meter(
+		ScopeName,
+		metric.WithInstrumentationVersion(Version),
+		metric.WithSchemaURL(SchemaURL),
+	)
+
+	var err error
+
+	inflightSpans, e := otelconv.NewSDKExporterSpanInflight(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create span inflight metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.inflightSpans = inflightSpans.Inst()
+
+	exportedSpans, e := otelconv.NewSDKExporterSpanExported(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create span exported metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.exportedSpans = exportedSpans.Inst()
+
+	opDuration, e := otelconv.NewSDKExporterOperationDuration(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create operation duration metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.opDuration = opDuration.Inst()
+
+	return i, err
+}
+
+// ExportSpans instruments the ExportSpans method of the exporter. It returns a
+// function that needs to be deferred so it is called when the method returns.
+func (i *Instrumentation) ExportSpans(ctx context.Context, nSpans int) ExportOp {
+	start := time.Now()
+
+	if i.inflightSpans.Enabled(ctx) {
+		addOpt := get[metric.AddOption](addOptPool)
+		defer put(addOptPool, addOpt)
+		*addOpt = append(*addOpt, i.setOpt)
+		i.inflightSpans.Add(ctx, int64(nSpans), *addOpt...)
+	}
+
+	return ExportOp{
+		ctx:    ctx,
+		start:  start,
+		nSpans: int64(nSpans),
+		inst:   i,
+	}
+}
+
+// ExportOp is an in-progress ExportSpans operation.
+type ExportOp struct {
+	ctx    context.Context
+	start  time.Time
+	nSpans int64
+	inst   *Instrumentation
+}
+
+// End ends the ExportSpans operation, recording its success and duration.
+//
+// The success parameter indicates how many spans were successfully exported.
+// The err parameter indicates whether the operation failed. If err is not nil,
+// the number of failed spans (nSpans - success) is also recorded.
+func (e ExportOp) End(success int64, err error) {
+	inflightSpansEnable := e.inst.inflightSpans.Enabled(e.ctx)
+	exportedSpansEnable := e.inst.exportedSpans.Enabled(e.ctx)
+	opDurationEnable := e.inst.opDuration.Enabled(e.ctx)
+
+	if !inflightSpansEnable && !exportedSpansEnable && !opDurationEnable {
+		return
+	}
+
+	addOpt := get[metric.AddOption](addOptPool)
+	defer put(addOptPool, addOpt)
+	*addOpt = append(*addOpt, e.inst.setOpt)
+
+	if inflightSpansEnable {
+		e.inst.inflightSpans.Add(e.ctx, -e.nSpans, *addOpt...)
+	}
+
+	// Record the success and duration of the operation.
+	//
+	// Do not exclude 0 values, as they are valid and indicate no spans
+	// were exported which is meaningful for certain aggregations.
+	if exportedSpansEnable {
+		e.inst.exportedSpans.Add(e.ctx, success, *addOpt...)
+	}
+
+	mOpt := e.inst.setOpt
+	if err != nil && exportedSpansEnable {
+		attrs := get[attribute.KeyValue](measureAttrsPool)
+		defer put(measureAttrsPool, attrs)
+		*attrs = append(*attrs, e.inst.attrs...)
+		*attrs = append(*attrs, semconv.ErrorType(err))
+
+		// Do not inefficiently make a copy of attrs by using
+		// WithAttributes instead of WithAttributeSet.
+		set := attribute.NewSet(*attrs...)
+		mOpt = metric.WithAttributeSet(set)
+
+		// Reset addOpt with new attribute set.
+		*addOpt = append((*addOpt)[:0], mOpt)
+
+		e.inst.exportedSpans.Add(e.ctx, e.nSpans-success, *addOpt...)
+	}
+
+	if opDurationEnable {
+		recordOpt := get[metric.RecordOption](recordOptPool)
+		defer put(recordOptPool, recordOpt)
+		*recordOpt = append(*recordOpt, mOpt)
+		e.inst.opDuration.Record(e.ctx, time.Since(e.start).Seconds(), *recordOpt...)
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/version.go

@@ -0,0 +1,8 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package internal // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal"
+
+// Version is the current release version of the OpenTelemetry stdouttrace
+// exporter in use.
+const Version = "1.43.0"

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x/README.md

@@ -0,0 +1,36 @@
+# Experimental Features
+
+The `stdouttrace` exporter contains features that have not yet stabilized in the OpenTelemetry specification.
+These features are added to the `stdouttrace` exporter prior to stabilization in the specification so that users can start experimenting with them and provide feedback.
+
+These features may change in backwards incompatible ways as feedback is applied.
+See the [Compatibility and Stability](#compatibility-and-stability) section for more information.
+
+## Features
+
+- [Observability](#observability)
+
+### Observability
+
+The `stdouttrace` exporter can be configured to provide observability about itself using OpenTelemetry metrics.
+
+To opt-in, set the environment variable `OTEL_GO_X_OBSERVABILITY` to `true`.
+
+When enabled, the SDK will create the following metrics using the global `MeterProvider`:
+
+- `otel.sdk.exporter.span.inflight`
+- `otel.sdk.exporter.span.exported`
+- `otel.sdk.exporter.operation.duration`
+
+Please see the [Semantic conventions for OpenTelemetry SDK metrics] documentation for more details on these metrics.
+
+[Semantic conventions for OpenTelemetry SDK metrics]: https://github.com/open-telemetry/semantic-conventions/blob/v1.36.0/docs/otel/sdk-metrics.md
+
+## Compatibility and Stability
+
+Experimental features do not fall within the scope of the OpenTelemetry Go versioning and stability [policy](../../../../../VERSIONING.md).
+These features may be removed or modified in successive version releases, including patch versions.
+
+When an experimental feature is promoted to a stable feature, a migration path will be included in the changelog entry of the release.
+There is no guarantee that any environment variable feature flags that enabled the experimental feature will be supported by the stable version.
+If they are supported, they may be accompanied with a deprecation notice stating a timeline for the removal of that support.

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x/features.go

@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package x documents experimental features for [go.opentelemetry.io/otel/exporters/stdout/stdouttrace].
+package x // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x"
+
+import "strings"
+
+// Observability is an experimental feature flag that determines if exporter
+// observability metrics are enabled.
+//
+// To enable this feature set the OTEL_GO_X_OBSERVABILITY environment variable
+// to the case-insensitive string value of "true" (i.e. "True" and "TRUE"
+// will also enable this).
+var Observability = newFeature(
+	[]string{"OBSERVABILITY", "SELF_OBSERVABILITY"},
+	func(v string) (string, bool) {
+		if strings.EqualFold(v, "true") {
+			return v, true
+		}
+		return "", false
+	},
+)

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x/x.go

@@ -0,0 +1,58 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/x/x.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package x documents experimental features for [go.opentelemetry.io/otel/exporters/stdout/stdouttrace].
+package x // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x"
+
+import (
+	"os"
+)
+
+// Feature is an experimental feature control flag. It provides a uniform way
+// to interact with these feature flags and parse their values.
+type Feature[T any] struct {
+	keys  []string
+	parse func(v string) (T, bool)
+}
+
+func newFeature[T any](suffix []string, parse func(string) (T, bool)) Feature[T] {
+	const envKeyRoot = "OTEL_GO_X_"
+	keys := make([]string, 0, len(suffix))
+	for _, s := range suffix {
+		keys = append(keys, envKeyRoot+s)
+	}
+	return Feature[T]{
+		keys:  keys,
+		parse: parse,
+	}
+}
+
+// Keys returns the environment variable keys that can be set to enable the
+// feature.
+func (f Feature[T]) Keys() []string { return f.keys }
+
+// Lookup returns the user configured value for the feature and true if the
+// user has enabled the feature. Otherwise, if the feature is not enabled, a
+// zero-value and false are returned.
+func (f Feature[T]) Lookup() (v T, ok bool) {
+	// https://github.com/open-telemetry/opentelemetry-specification/blob/62effed618589a0bec416a87e559c0a9d96289bb/specification/configuration/sdk-environment-variables.md#parsing-empty-value
+	//
+	// > The SDK MUST interpret an empty value of an environment variable the
+	// > same way as when the variable is unset.
+	for _, key := range f.keys {
+		vRaw := os.Getenv(key)
+		if vRaw != "" {
+			return f.parse(vRaw)
+		}
+	}
+	return v, ok
+}
+
+// Enabled reports whether the feature is enabled.
+func (f Feature[T]) Enabled() bool {
+	_, ok := f.Lookup()
+	return ok
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/trace.go

@@ -0,0 +1,121 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter"
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ"
+	"go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/sdk/trace/tracetest"
+)
+
+var zeroTime time.Time
+
+var _ trace.SpanExporter = &Exporter{}
+
+// New creates an Exporter with the passed options.
+func New(options ...Option) (*Exporter, error) {
+	cfg := newConfig(options...)
+
+	enc := json.NewEncoder(cfg.Writer)
+	if cfg.PrettyPrint {
+		enc.SetIndent("", "\t")
+	}
+
+	exporter := &Exporter{
+		encoder:    enc,
+		timestamps: cfg.Timestamps,
+	}
+
+	var err error
+	exporter.inst, err = observ.NewInstrumentation(counter.NextExporterID())
+	return exporter, err
+}
+
+// Exporter is an implementation of trace.SpanSyncer that writes spans to stdout.
+type Exporter struct {
+	encoder    *json.Encoder
+	encoderMu  sync.Mutex
+	timestamps bool
+
+	stoppedMu sync.RWMutex
+	stopped   bool
+
+	inst *observ.Instrumentation
+}
+
+// ExportSpans writes spans in json format to stdout.
+func (e *Exporter) ExportSpans(ctx context.Context, spans []trace.ReadOnlySpan) (err error) {
+	var success int64
+	if e.inst != nil {
+		op := e.inst.ExportSpans(ctx, len(spans))
+		defer func() { op.End(success, err) }()
+	}
+
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	e.stoppedMu.RLock()
+	stopped := e.stopped
+	e.stoppedMu.RUnlock()
+	if stopped {
+		return nil
+	}
+
+	if len(spans) == 0 {
+		return nil
+	}
+
+	stubs := tracetest.SpanStubsFromReadOnlySpans(spans)
+
+	e.encoderMu.Lock()
+	defer e.encoderMu.Unlock()
+	for i := range stubs {
+		stub := &stubs[i]
+		// Remove timestamps
+		if !e.timestamps {
+			stub.StartTime = zeroTime
+			stub.EndTime = zeroTime
+			for j := range stub.Events {
+				ev := &stub.Events[j]
+				ev.Time = zeroTime
+			}
+		}
+
+		// Encode span stubs, one by one
+		if e := e.encoder.Encode(stub); e != nil {
+			err = errors.Join(err, fmt.Errorf("failed to encode span %d: %w", i, e))
+			continue
+		}
+		success++
+	}
+	return err
+}
+
+// Shutdown is called to stop the exporter, it performs no action.
+func (e *Exporter) Shutdown(context.Context) error {
+	e.stoppedMu.Lock()
+	e.stopped = true
+	e.stoppedMu.Unlock()
+
+	return nil
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Exporter.
+func (e *Exporter) MarshalLog() any {
+	return struct {
+		Type           string
+		WithTimestamps bool
+	}{
+		Type:           "stdout",
+		WithTimestamps: e.timestamps,
+	}
+}