[VOL-5486] Upgrade library versions
Change-Id: I8b4e88699e03f44ee13e467867f45ae3f0a63c4b
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/README.md b/vendor/go.opentelemetry.io/otel/sdk/trace/README.md
new file mode 100644
index 0000000..f2936e1
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/README.md
@@ -0,0 +1,3 @@
+# SDK Trace
+
+[](https://pkg.go.dev/go.opentelemetry.io/otel/sdk/trace)
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go b/vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go
new file mode 100644
index 0000000..6966ed8
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/batch_span_processor.go
@@ -0,0 +1,414 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "errors"
+ "sync"
+ "sync/atomic"
+ "time"
+
+ "go.opentelemetry.io/otel"
+ "go.opentelemetry.io/otel/internal/global"
+ "go.opentelemetry.io/otel/sdk/internal/env"
+ "go.opentelemetry.io/otel/trace"
+)
+
+// Defaults for BatchSpanProcessorOptions.
+const (
+ DefaultMaxQueueSize = 2048
+ DefaultScheduleDelay = 5000
+ DefaultExportTimeout = 30000
+ DefaultMaxExportBatchSize = 512
+)
+
+// BatchSpanProcessorOption configures a BatchSpanProcessor.
+type BatchSpanProcessorOption func(o *BatchSpanProcessorOptions)
+
+// BatchSpanProcessorOptions is configuration settings for a
+// BatchSpanProcessor.
+type BatchSpanProcessorOptions struct {
+ // MaxQueueSize is the maximum queue size to buffer spans for delayed processing. If the
+ // queue gets full it drops the spans. Use BlockOnQueueFull to change this behavior.
+ // The default value of MaxQueueSize is 2048.
+ MaxQueueSize int
+
+ // BatchTimeout is the maximum duration for constructing a batch. Processor
+ // forcefully sends available spans when timeout is reached.
+ // The default value of BatchTimeout is 5000 msec.
+ BatchTimeout time.Duration
+
+ // ExportTimeout specifies the maximum duration for exporting spans. If the timeout
+ // is reached, the export will be cancelled.
+ // The default value of ExportTimeout is 30000 msec.
+ ExportTimeout time.Duration
+
+ // MaxExportBatchSize is the maximum number of spans to process in a single batch.
+ // If there are more than one batch worth of spans then it processes multiple batches
+ // of spans one batch after the other without any delay.
+ // The default value of MaxExportBatchSize is 512.
+ MaxExportBatchSize int
+
+ // BlockOnQueueFull blocks onEnd() and onStart() method if the queue is full
+ // AND if BlockOnQueueFull is set to true.
+ // Blocking option should be used carefully as it can severely affect the performance of an
+ // application.
+ BlockOnQueueFull bool
+}
+
+// batchSpanProcessor is a SpanProcessor that batches asynchronously-received
+// spans and sends them to a trace.Exporter when complete.
+type batchSpanProcessor struct {
+ e SpanExporter
+ o BatchSpanProcessorOptions
+
+ queue chan ReadOnlySpan
+ dropped uint32
+
+ batch []ReadOnlySpan
+ batchMutex sync.Mutex
+ timer *time.Timer
+ stopWait sync.WaitGroup
+ stopOnce sync.Once
+ stopCh chan struct{}
+ stopped atomic.Bool
+}
+
+var _ SpanProcessor = (*batchSpanProcessor)(nil)
+
+// NewBatchSpanProcessor creates a new SpanProcessor that will send completed
+// span batches to the exporter with the supplied options.
+//
+// If the exporter is nil, the span processor will perform no action.
+func NewBatchSpanProcessor(exporter SpanExporter, options ...BatchSpanProcessorOption) SpanProcessor {
+ maxQueueSize := env.BatchSpanProcessorMaxQueueSize(DefaultMaxQueueSize)
+ maxExportBatchSize := env.BatchSpanProcessorMaxExportBatchSize(DefaultMaxExportBatchSize)
+
+ if maxExportBatchSize > maxQueueSize {
+ if DefaultMaxExportBatchSize > maxQueueSize {
+ maxExportBatchSize = maxQueueSize
+ } else {
+ maxExportBatchSize = DefaultMaxExportBatchSize
+ }
+ }
+
+ o := BatchSpanProcessorOptions{
+ BatchTimeout: time.Duration(env.BatchSpanProcessorScheduleDelay(DefaultScheduleDelay)) * time.Millisecond,
+ ExportTimeout: time.Duration(env.BatchSpanProcessorExportTimeout(DefaultExportTimeout)) * time.Millisecond,
+ MaxQueueSize: maxQueueSize,
+ MaxExportBatchSize: maxExportBatchSize,
+ }
+ for _, opt := range options {
+ opt(&o)
+ }
+ bsp := &batchSpanProcessor{
+ e: exporter,
+ o: o,
+ batch: make([]ReadOnlySpan, 0, o.MaxExportBatchSize),
+ timer: time.NewTimer(o.BatchTimeout),
+ queue: make(chan ReadOnlySpan, o.MaxQueueSize),
+ stopCh: make(chan struct{}),
+ }
+
+ bsp.stopWait.Add(1)
+ go func() {
+ defer bsp.stopWait.Done()
+ bsp.processQueue()
+ bsp.drainQueue()
+ }()
+
+ return bsp
+}
+
+// OnStart method does nothing.
+func (bsp *batchSpanProcessor) OnStart(parent context.Context, s ReadWriteSpan) {}
+
+// OnEnd method enqueues a ReadOnlySpan for later processing.
+func (bsp *batchSpanProcessor) OnEnd(s ReadOnlySpan) {
+ // Do not enqueue spans after Shutdown.
+ if bsp.stopped.Load() {
+ return
+ }
+
+ // Do not enqueue spans if we are just going to drop them.
+ if bsp.e == nil {
+ return
+ }
+ bsp.enqueue(s)
+}
+
+// Shutdown flushes the queue and waits until all spans are processed.
+// It only executes once. Subsequent call does nothing.
+func (bsp *batchSpanProcessor) Shutdown(ctx context.Context) error {
+ var err error
+ bsp.stopOnce.Do(func() {
+ bsp.stopped.Store(true)
+ wait := make(chan struct{})
+ go func() {
+ close(bsp.stopCh)
+ bsp.stopWait.Wait()
+ if bsp.e != nil {
+ if err := bsp.e.Shutdown(ctx); err != nil {
+ otel.Handle(err)
+ }
+ }
+ close(wait)
+ }()
+ // Wait until the wait group is done or the context is cancelled
+ select {
+ case <-wait:
+ case <-ctx.Done():
+ err = ctx.Err()
+ }
+ })
+ return err
+}
+
+type forceFlushSpan struct {
+ ReadOnlySpan
+ flushed chan struct{}
+}
+
+func (f forceFlushSpan) SpanContext() trace.SpanContext {
+ return trace.NewSpanContext(trace.SpanContextConfig{TraceFlags: trace.FlagsSampled})
+}
+
+// ForceFlush exports all ended spans that have not yet been exported.
+func (bsp *batchSpanProcessor) ForceFlush(ctx context.Context) error {
+ // Interrupt if context is already canceled.
+ if err := ctx.Err(); err != nil {
+ return err
+ }
+
+ // Do nothing after Shutdown.
+ if bsp.stopped.Load() {
+ return nil
+ }
+
+ var err error
+ if bsp.e != nil {
+ flushCh := make(chan struct{})
+ if bsp.enqueueBlockOnQueueFull(ctx, forceFlushSpan{flushed: flushCh}) {
+ select {
+ case <-bsp.stopCh:
+ // The batchSpanProcessor is Shutdown.
+ return nil
+ case <-flushCh:
+ // Processed any items in queue prior to ForceFlush being called
+ case <-ctx.Done():
+ return ctx.Err()
+ }
+ }
+
+ wait := make(chan error, 1)
+ go func() {
+ wait <- bsp.exportSpans(ctx)
+ }()
+ // Wait until the export is finished or the context is cancelled/timed out
+ select {
+ case err = <-wait:
+ case <-ctx.Done():
+ err = ctx.Err()
+ }
+ }
+ return err
+}
+
+// WithMaxQueueSize returns a BatchSpanProcessorOption that configures the
+// maximum queue size allowed for a BatchSpanProcessor.
+func WithMaxQueueSize(size int) BatchSpanProcessorOption {
+ return func(o *BatchSpanProcessorOptions) {
+ o.MaxQueueSize = size
+ }
+}
+
+// WithMaxExportBatchSize returns a BatchSpanProcessorOption that configures
+// the maximum export batch size allowed for a BatchSpanProcessor.
+func WithMaxExportBatchSize(size int) BatchSpanProcessorOption {
+ return func(o *BatchSpanProcessorOptions) {
+ o.MaxExportBatchSize = size
+ }
+}
+
+// WithBatchTimeout returns a BatchSpanProcessorOption that configures the
+// maximum delay allowed for a BatchSpanProcessor before it will export any
+// held span (whether the queue is full or not).
+func WithBatchTimeout(delay time.Duration) BatchSpanProcessorOption {
+ return func(o *BatchSpanProcessorOptions) {
+ o.BatchTimeout = delay
+ }
+}
+
+// WithExportTimeout returns a BatchSpanProcessorOption that configures the
+// amount of time a BatchSpanProcessor waits for an exporter to export before
+// abandoning the export.
+func WithExportTimeout(timeout time.Duration) BatchSpanProcessorOption {
+ return func(o *BatchSpanProcessorOptions) {
+ o.ExportTimeout = timeout
+ }
+}
+
+// WithBlocking returns a BatchSpanProcessorOption that configures a
+// BatchSpanProcessor to wait for enqueue operations to succeed instead of
+// dropping data when the queue is full.
+func WithBlocking() BatchSpanProcessorOption {
+ return func(o *BatchSpanProcessorOptions) {
+ o.BlockOnQueueFull = true
+ }
+}
+
+// exportSpans is a subroutine of processing and draining the queue.
+func (bsp *batchSpanProcessor) exportSpans(ctx context.Context) error {
+ bsp.timer.Reset(bsp.o.BatchTimeout)
+
+ bsp.batchMutex.Lock()
+ defer bsp.batchMutex.Unlock()
+
+ if bsp.o.ExportTimeout > 0 {
+ var cancel context.CancelFunc
+ ctx, cancel = context.WithTimeoutCause(ctx, bsp.o.ExportTimeout, errors.New("processor export timeout"))
+ defer cancel()
+ }
+
+ if l := len(bsp.batch); l > 0 {
+ global.Debug("exporting spans", "count", len(bsp.batch), "total_dropped", atomic.LoadUint32(&bsp.dropped))
+ err := bsp.e.ExportSpans(ctx, bsp.batch)
+
+ // A new batch is always created after exporting, even if the batch failed to be exported.
+ //
+ // It is up to the exporter to implement any type of retry logic if a batch is failing
+ // to be exported, since it is specific to the protocol and backend being sent to.
+ clear(bsp.batch) // Erase elements to let GC collect objects
+ bsp.batch = bsp.batch[:0]
+
+ if err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+// processQueue removes spans from the `queue` channel until processor
+// is shut down. It calls the exporter in batches of up to MaxExportBatchSize
+// waiting up to BatchTimeout to form a batch.
+func (bsp *batchSpanProcessor) processQueue() {
+ defer bsp.timer.Stop()
+
+ ctx, cancel := context.WithCancel(context.Background())
+ defer cancel()
+ for {
+ select {
+ case <-bsp.stopCh:
+ return
+ case <-bsp.timer.C:
+ if err := bsp.exportSpans(ctx); err != nil {
+ otel.Handle(err)
+ }
+ case sd := <-bsp.queue:
+ if ffs, ok := sd.(forceFlushSpan); ok {
+ close(ffs.flushed)
+ continue
+ }
+ bsp.batchMutex.Lock()
+ bsp.batch = append(bsp.batch, sd)
+ shouldExport := len(bsp.batch) >= bsp.o.MaxExportBatchSize
+ bsp.batchMutex.Unlock()
+ if shouldExport {
+ if !bsp.timer.Stop() {
+ // Handle both GODEBUG=asynctimerchan=[0|1] properly.
+ select {
+ case <-bsp.timer.C:
+ default:
+ }
+ }
+ if err := bsp.exportSpans(ctx); err != nil {
+ otel.Handle(err)
+ }
+ }
+ }
+ }
+}
+
+// drainQueue awaits the any caller that had added to bsp.stopWait
+// to finish the enqueue, then exports the final batch.
+func (bsp *batchSpanProcessor) drainQueue() {
+ ctx, cancel := context.WithCancel(context.Background())
+ defer cancel()
+ for {
+ select {
+ case sd := <-bsp.queue:
+ if _, ok := sd.(forceFlushSpan); ok {
+ // Ignore flush requests as they are not valid spans.
+ continue
+ }
+
+ bsp.batchMutex.Lock()
+ bsp.batch = append(bsp.batch, sd)
+ shouldExport := len(bsp.batch) == bsp.o.MaxExportBatchSize
+ bsp.batchMutex.Unlock()
+
+ if shouldExport {
+ if err := bsp.exportSpans(ctx); err != nil {
+ otel.Handle(err)
+ }
+ }
+ default:
+ // There are no more enqueued spans. Make final export.
+ if err := bsp.exportSpans(ctx); err != nil {
+ otel.Handle(err)
+ }
+ return
+ }
+ }
+}
+
+func (bsp *batchSpanProcessor) enqueue(sd ReadOnlySpan) {
+ ctx := context.TODO()
+ if bsp.o.BlockOnQueueFull {
+ bsp.enqueueBlockOnQueueFull(ctx, sd)
+ } else {
+ bsp.enqueueDrop(ctx, sd)
+ }
+}
+
+func (bsp *batchSpanProcessor) enqueueBlockOnQueueFull(ctx context.Context, sd ReadOnlySpan) bool {
+ if !sd.SpanContext().IsSampled() {
+ return false
+ }
+
+ select {
+ case bsp.queue <- sd:
+ return true
+ case <-ctx.Done():
+ return false
+ }
+}
+
+func (bsp *batchSpanProcessor) enqueueDrop(_ context.Context, sd ReadOnlySpan) bool {
+ if !sd.SpanContext().IsSampled() {
+ return false
+ }
+
+ select {
+ case bsp.queue <- sd:
+ return true
+ default:
+ atomic.AddUint32(&bsp.dropped, 1)
+ }
+ return false
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Span Processor.
+func (bsp *batchSpanProcessor) MarshalLog() interface{} {
+ return struct {
+ Type string
+ SpanExporter SpanExporter
+ Config BatchSpanProcessorOptions
+ }{
+ Type: "BatchSpanProcessor",
+ SpanExporter: bsp.e,
+ Config: bsp.o,
+ }
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/doc.go b/vendor/go.opentelemetry.io/otel/sdk/trace/doc.go
new file mode 100644
index 0000000..1f60524
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/doc.go
@@ -0,0 +1,10 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+/*
+Package trace contains support for OpenTelemetry distributed tracing.
+
+The following assumes a basic familiarity with OpenTelemetry concepts.
+See https://opentelemetry.io.
+*/
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/event.go b/vendor/go.opentelemetry.io/otel/sdk/trace/event.go
new file mode 100644
index 0000000..60a7ed1
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/event.go
@@ -0,0 +1,26 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "time"
+
+ "go.opentelemetry.io/otel/attribute"
+)
+
+// Event is a thing that happened during a Span's lifetime.
+type Event struct {
+ // Name is the name of this event
+ Name string
+
+ // Attributes describe the aspects of the event.
+ Attributes []attribute.KeyValue
+
+ // DroppedAttributeCount is the number of attributes that were not
+ // recorded due to configured limits being reached.
+ DroppedAttributeCount int
+
+ // Time at which this event was recorded.
+ Time time.Time
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go b/vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go
new file mode 100644
index 0000000..8c308dd
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/evictedqueue.go
@@ -0,0 +1,64 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "slices"
+ "sync"
+
+ "go.opentelemetry.io/otel/internal/global"
+)
+
+// evictedQueue is a FIFO queue with a configurable capacity.
+type evictedQueue[T any] struct {
+ queue []T
+ capacity int
+ droppedCount int
+ logDroppedMsg string
+ logDroppedOnce sync.Once
+}
+
+func newEvictedQueueEvent(capacity int) evictedQueue[Event] {
+ // Do not pre-allocate queue, do this lazily.
+ return evictedQueue[Event]{
+ capacity: capacity,
+ logDroppedMsg: "limit reached: dropping trace trace.Event",
+ }
+}
+
+func newEvictedQueueLink(capacity int) evictedQueue[Link] {
+ // Do not pre-allocate queue, do this lazily.
+ return evictedQueue[Link]{
+ capacity: capacity,
+ logDroppedMsg: "limit reached: dropping trace trace.Link",
+ }
+}
+
+// add adds value to the evictedQueue eq. If eq is at capacity, the oldest
+// queued value will be discarded and the drop count incremented.
+func (eq *evictedQueue[T]) add(value T) {
+ if eq.capacity == 0 {
+ eq.droppedCount++
+ eq.logDropped()
+ return
+ }
+
+ if eq.capacity > 0 && len(eq.queue) == eq.capacity {
+ // Drop first-in while avoiding allocating more capacity to eq.queue.
+ copy(eq.queue[:eq.capacity-1], eq.queue[1:])
+ eq.queue = eq.queue[:eq.capacity-1]
+ eq.droppedCount++
+ eq.logDropped()
+ }
+ eq.queue = append(eq.queue, value)
+}
+
+func (eq *evictedQueue[T]) logDropped() {
+ eq.logDroppedOnce.Do(func() { global.Warn(eq.logDroppedMsg) })
+}
+
+// copy returns a copy of the evictedQueue.
+func (eq *evictedQueue[T]) copy() []T {
+ return slices.Clone(eq.queue)
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go b/vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go
new file mode 100644
index 0000000..c8d3fb7
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/id_generator.go
@@ -0,0 +1,69 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "encoding/binary"
+ "math/rand/v2"
+
+ "go.opentelemetry.io/otel/trace"
+)
+
+// IDGenerator allows custom generators for TraceID and SpanID.
+type IDGenerator interface {
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // NewIDs returns a new trace and span ID.
+ NewIDs(ctx context.Context) (trace.TraceID, trace.SpanID)
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // NewSpanID returns a ID for a new span in the trace with traceID.
+ NewSpanID(ctx context.Context, traceID trace.TraceID) trace.SpanID
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+}
+
+type randomIDGenerator struct{}
+
+var _ IDGenerator = &randomIDGenerator{}
+
+// NewSpanID returns a non-zero span ID from a randomly-chosen sequence.
+func (gen *randomIDGenerator) NewSpanID(ctx context.Context, traceID trace.TraceID) trace.SpanID {
+ sid := trace.SpanID{}
+ for {
+ binary.NativeEndian.PutUint64(sid[:], rand.Uint64())
+ if sid.IsValid() {
+ break
+ }
+ }
+ return sid
+}
+
+// NewIDs returns a non-zero trace ID and a non-zero span ID from a
+// randomly-chosen sequence.
+func (gen *randomIDGenerator) NewIDs(ctx context.Context) (trace.TraceID, trace.SpanID) {
+ tid := trace.TraceID{}
+ sid := trace.SpanID{}
+ for {
+ binary.NativeEndian.PutUint64(tid[:8], rand.Uint64())
+ binary.NativeEndian.PutUint64(tid[8:], rand.Uint64())
+ if tid.IsValid() {
+ break
+ }
+ }
+ for {
+ binary.NativeEndian.PutUint64(sid[:], rand.Uint64())
+ if sid.IsValid() {
+ break
+ }
+ }
+ return tid, sid
+}
+
+func defaultIDGenerator() IDGenerator {
+ return &randomIDGenerator{}
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/link.go b/vendor/go.opentelemetry.io/otel/sdk/trace/link.go
new file mode 100644
index 0000000..c03bdc9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/link.go
@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "go.opentelemetry.io/otel/attribute"
+ "go.opentelemetry.io/otel/trace"
+)
+
+// Link is the relationship between two Spans. The relationship can be within
+// the same Trace or across different Traces.
+type Link struct {
+ // SpanContext of the linked Span.
+ SpanContext trace.SpanContext
+
+ // Attributes describe the aspects of the link.
+ Attributes []attribute.KeyValue
+
+ // DroppedAttributeCount is the number of attributes that were not
+ // recorded due to configured limits being reached.
+ DroppedAttributeCount int
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/provider.go b/vendor/go.opentelemetry.io/otel/sdk/trace/provider.go
new file mode 100644
index 0000000..0e2a2e7
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/provider.go
@@ -0,0 +1,504 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "fmt"
+ "sync"
+ "sync/atomic"
+
+ "go.opentelemetry.io/otel"
+ "go.opentelemetry.io/otel/internal/global"
+ "go.opentelemetry.io/otel/sdk/instrumentation"
+ "go.opentelemetry.io/otel/sdk/resource"
+ "go.opentelemetry.io/otel/trace"
+ "go.opentelemetry.io/otel/trace/embedded"
+ "go.opentelemetry.io/otel/trace/noop"
+)
+
+const (
+ defaultTracerName = "go.opentelemetry.io/otel/sdk/tracer"
+)
+
+// tracerProviderConfig.
+type tracerProviderConfig struct {
+ // processors contains collection of SpanProcessors that are processing pipeline
+ // for spans in the trace signal.
+ // SpanProcessors registered with a TracerProvider and are called at the start
+ // and end of a Span's lifecycle, and are called in the order they are
+ // registered.
+ processors []SpanProcessor
+
+ // sampler is the default sampler used when creating new spans.
+ sampler Sampler
+
+ // idGenerator is used to generate all Span and Trace IDs when needed.
+ idGenerator IDGenerator
+
+ // spanLimits defines the attribute, event, and link limits for spans.
+ spanLimits SpanLimits
+
+ // resource contains attributes representing an entity that produces telemetry.
+ resource *resource.Resource
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Provider.
+func (cfg tracerProviderConfig) MarshalLog() interface{} {
+ return struct {
+ SpanProcessors []SpanProcessor
+ SamplerType string
+ IDGeneratorType string
+ SpanLimits SpanLimits
+ Resource *resource.Resource
+ }{
+ SpanProcessors: cfg.processors,
+ SamplerType: fmt.Sprintf("%T", cfg.sampler),
+ IDGeneratorType: fmt.Sprintf("%T", cfg.idGenerator),
+ SpanLimits: cfg.spanLimits,
+ Resource: cfg.resource,
+ }
+}
+
+// TracerProvider is an OpenTelemetry TracerProvider. It provides Tracers to
+// instrumentation so it can trace operational flow through a system.
+type TracerProvider struct {
+ embedded.TracerProvider
+
+ mu sync.Mutex
+ namedTracer map[instrumentation.Scope]*tracer
+ spanProcessors atomic.Pointer[spanProcessorStates]
+
+ isShutdown atomic.Bool
+
+ // These fields are not protected by the lock mu. They are assumed to be
+ // immutable after creation of the TracerProvider.
+ sampler Sampler
+ idGenerator IDGenerator
+ spanLimits SpanLimits
+ resource *resource.Resource
+}
+
+var _ trace.TracerProvider = &TracerProvider{}
+
+// NewTracerProvider returns a new and configured TracerProvider.
+//
+// By default the returned TracerProvider is configured with:
+// - a ParentBased(AlwaysSample) Sampler
+// - a random number IDGenerator
+// - the resource.Default() Resource
+// - the default SpanLimits.
+//
+// The passed opts are used to override these default values and configure the
+// returned TracerProvider appropriately.
+func NewTracerProvider(opts ...TracerProviderOption) *TracerProvider {
+ o := tracerProviderConfig{
+ spanLimits: NewSpanLimits(),
+ }
+ o = applyTracerProviderEnvConfigs(o)
+
+ for _, opt := range opts {
+ o = opt.apply(o)
+ }
+
+ o = ensureValidTracerProviderConfig(o)
+
+ tp := &TracerProvider{
+ namedTracer: make(map[instrumentation.Scope]*tracer),
+ sampler: o.sampler,
+ idGenerator: o.idGenerator,
+ spanLimits: o.spanLimits,
+ resource: o.resource,
+ }
+ global.Info("TracerProvider created", "config", o)
+
+ spss := make(spanProcessorStates, 0, len(o.processors))
+ for _, sp := range o.processors {
+ spss = append(spss, newSpanProcessorState(sp))
+ }
+ tp.spanProcessors.Store(&spss)
+
+ return tp
+}
+
+// Tracer returns a Tracer with the given name and options. If a Tracer for
+// the given name and options does not exist it is created, otherwise the
+// existing Tracer is returned.
+//
+// If name is empty, DefaultTracerName is used instead.
+//
+// This method is safe to be called concurrently.
+func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
+ // This check happens before the mutex is acquired to avoid deadlocking if Tracer() is called from within Shutdown().
+ if p.isShutdown.Load() {
+ return noop.NewTracerProvider().Tracer(name, opts...)
+ }
+ c := trace.NewTracerConfig(opts...)
+ if name == "" {
+ name = defaultTracerName
+ }
+ is := instrumentation.Scope{
+ Name: name,
+ Version: c.InstrumentationVersion(),
+ SchemaURL: c.SchemaURL(),
+ Attributes: c.InstrumentationAttributes(),
+ }
+
+ t, ok := func() (trace.Tracer, bool) {
+ p.mu.Lock()
+ defer p.mu.Unlock()
+ // Must check the flag after acquiring the mutex to avoid returning a valid tracer if Shutdown() ran
+ // after the first check above but before we acquired the mutex.
+ if p.isShutdown.Load() {
+ return noop.NewTracerProvider().Tracer(name, opts...), true
+ }
+ t, ok := p.namedTracer[is]
+ if !ok {
+ t = &tracer{
+ provider: p,
+ instrumentationScope: is,
+ }
+ p.namedTracer[is] = t
+ }
+ return t, ok
+ }()
+ if !ok {
+ // This code is outside the mutex to not hold the lock while calling third party logging code:
+ // - That code may do slow things like I/O, which would prolong the duration the lock is held,
+ // slowing down all tracing consumers.
+ // - Logging code may be instrumented with tracing and deadlock because it could try
+ // acquiring the same non-reentrant mutex.
+ global.Info(
+ "Tracer created",
+ "name",
+ name,
+ "version",
+ is.Version,
+ "schemaURL",
+ is.SchemaURL,
+ "attributes",
+ is.Attributes,
+ )
+ }
+ return t
+}
+
+// RegisterSpanProcessor adds the given SpanProcessor to the list of SpanProcessors.
+func (p *TracerProvider) RegisterSpanProcessor(sp SpanProcessor) {
+ // This check prevents calls during a shutdown.
+ if p.isShutdown.Load() {
+ return
+ }
+ p.mu.Lock()
+ defer p.mu.Unlock()
+ // This check prevents calls after a shutdown.
+ if p.isShutdown.Load() {
+ return
+ }
+
+ current := p.getSpanProcessors()
+ newSPS := make(spanProcessorStates, 0, len(current)+1)
+ newSPS = append(newSPS, current...)
+ newSPS = append(newSPS, newSpanProcessorState(sp))
+ p.spanProcessors.Store(&newSPS)
+}
+
+// UnregisterSpanProcessor removes the given SpanProcessor from the list of SpanProcessors.
+func (p *TracerProvider) UnregisterSpanProcessor(sp SpanProcessor) {
+ // This check prevents calls during a shutdown.
+ if p.isShutdown.Load() {
+ return
+ }
+ p.mu.Lock()
+ defer p.mu.Unlock()
+ // This check prevents calls after a shutdown.
+ if p.isShutdown.Load() {
+ return
+ }
+ old := p.getSpanProcessors()
+ if len(old) == 0 {
+ return
+ }
+ spss := make(spanProcessorStates, len(old))
+ copy(spss, old)
+
+ // stop the span processor if it is started and remove it from the list
+ var stopOnce *spanProcessorState
+ var idx int
+ for i, sps := range spss {
+ if sps.sp == sp {
+ stopOnce = sps
+ idx = i
+ }
+ }
+ if stopOnce != nil {
+ stopOnce.state.Do(func() {
+ if err := sp.Shutdown(context.Background()); err != nil {
+ otel.Handle(err)
+ }
+ })
+ }
+ if len(spss) > 1 {
+ copy(spss[idx:], spss[idx+1:])
+ }
+ spss[len(spss)-1] = nil
+ spss = spss[:len(spss)-1]
+
+ p.spanProcessors.Store(&spss)
+}
+
+// ForceFlush immediately exports all spans that have not yet been exported for
+// all the registered span processors.
+func (p *TracerProvider) ForceFlush(ctx context.Context) error {
+ spss := p.getSpanProcessors()
+ if len(spss) == 0 {
+ return nil
+ }
+
+ for _, sps := range spss {
+ select {
+ case <-ctx.Done():
+ return ctx.Err()
+ default:
+ }
+
+ if err := sps.sp.ForceFlush(ctx); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+// Shutdown shuts down TracerProvider. All registered span processors are shut down
+// in the order they were registered and any held computational resources are released.
+// After Shutdown is called, all methods are no-ops.
+func (p *TracerProvider) Shutdown(ctx context.Context) error {
+ // This check prevents deadlocks in case of recursive shutdown.
+ if p.isShutdown.Load() {
+ return nil
+ }
+ p.mu.Lock()
+ defer p.mu.Unlock()
+ // This check prevents calls after a shutdown has already been done concurrently.
+ if !p.isShutdown.CompareAndSwap(false, true) { // did toggle?
+ return nil
+ }
+
+ var retErr error
+ for _, sps := range p.getSpanProcessors() {
+ select {
+ case <-ctx.Done():
+ return ctx.Err()
+ default:
+ }
+
+ var err error
+ sps.state.Do(func() {
+ err = sps.sp.Shutdown(ctx)
+ })
+ if err != nil {
+ if retErr == nil {
+ retErr = err
+ } else {
+ // Poor man's list of errors
+ retErr = fmt.Errorf("%w; %w", retErr, err)
+ }
+ }
+ }
+ p.spanProcessors.Store(&spanProcessorStates{})
+ return retErr
+}
+
+func (p *TracerProvider) getSpanProcessors() spanProcessorStates {
+ return *(p.spanProcessors.Load())
+}
+
+// TracerProviderOption configures a TracerProvider.
+type TracerProviderOption interface {
+ apply(tracerProviderConfig) tracerProviderConfig
+}
+
+type traceProviderOptionFunc func(tracerProviderConfig) tracerProviderConfig
+
+func (fn traceProviderOptionFunc) apply(cfg tracerProviderConfig) tracerProviderConfig {
+ return fn(cfg)
+}
+
+// WithSyncer registers the exporter with the TracerProvider using a
+// SimpleSpanProcessor.
+//
+// This is not recommended for production use. The synchronous nature of the
+// SimpleSpanProcessor that will wrap the exporter make it good for testing,
+// debugging, or showing examples of other feature, but it will be slow and
+// have a high computation resource usage overhead. The WithBatcher option is
+// recommended for production use instead.
+func WithSyncer(e SpanExporter) TracerProviderOption {
+ return WithSpanProcessor(NewSimpleSpanProcessor(e))
+}
+
+// WithBatcher registers the exporter with the TracerProvider using a
+// BatchSpanProcessor configured with the passed opts.
+func WithBatcher(e SpanExporter, opts ...BatchSpanProcessorOption) TracerProviderOption {
+ return WithSpanProcessor(NewBatchSpanProcessor(e, opts...))
+}
+
+// WithSpanProcessor registers the SpanProcessor with a TracerProvider.
+func WithSpanProcessor(sp SpanProcessor) TracerProviderOption {
+ return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+ cfg.processors = append(cfg.processors, sp)
+ return cfg
+ })
+}
+
+// WithResource returns a TracerProviderOption that will configure the
+// Resource r as a TracerProvider's Resource. The configured Resource is
+// referenced by all the Tracers the TracerProvider creates. It represents the
+// entity producing telemetry.
+//
+// If this option is not used, the TracerProvider will use the
+// resource.Default() Resource by default.
+func WithResource(r *resource.Resource) TracerProviderOption {
+ return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+ var err error
+ cfg.resource, err = resource.Merge(resource.Environment(), r)
+ if err != nil {
+ otel.Handle(err)
+ }
+ return cfg
+ })
+}
+
+// WithIDGenerator returns a TracerProviderOption that will configure the
+// IDGenerator g as a TracerProvider's IDGenerator. The configured IDGenerator
+// is used by the Tracers the TracerProvider creates to generate new Span and
+// Trace IDs.
+//
+// If this option is not used, the TracerProvider will use a random number
+// IDGenerator by default.
+func WithIDGenerator(g IDGenerator) TracerProviderOption {
+ return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+ if g != nil {
+ cfg.idGenerator = g
+ }
+ return cfg
+ })
+}
+
+// WithSampler returns a TracerProviderOption that will configure the Sampler
+// s as a TracerProvider's Sampler. The configured Sampler is used by the
+// Tracers the TracerProvider creates to make their sampling decisions for the
+// Spans they create.
+//
+// This option overrides the Sampler configured through the OTEL_TRACES_SAMPLER
+// and OTEL_TRACES_SAMPLER_ARG environment variables. If this option is not used
+// and the sampler is not configured through environment variables or the environment
+// contains invalid/unsupported configuration, the TracerProvider will use a
+// ParentBased(AlwaysSample) Sampler by default.
+func WithSampler(s Sampler) TracerProviderOption {
+ return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+ if s != nil {
+ cfg.sampler = s
+ }
+ return cfg
+ })
+}
+
+// WithSpanLimits returns a TracerProviderOption that configures a
+// TracerProvider to use the SpanLimits sl. These SpanLimits bound any Span
+// created by a Tracer from the TracerProvider.
+//
+// If any field of sl is zero or negative it will be replaced with the default
+// value for that field.
+//
+// If this or WithRawSpanLimits are not provided, the TracerProvider will use
+// the limits defined by environment variables, or the defaults if unset.
+// Refer to the NewSpanLimits documentation for information about this
+// relationship.
+//
+// Deprecated: Use WithRawSpanLimits instead which allows setting unlimited
+// and zero limits. This option will be kept until the next major version
+// incremented release.
+func WithSpanLimits(sl SpanLimits) TracerProviderOption {
+ if sl.AttributeValueLengthLimit <= 0 {
+ sl.AttributeValueLengthLimit = DefaultAttributeValueLengthLimit
+ }
+ if sl.AttributeCountLimit <= 0 {
+ sl.AttributeCountLimit = DefaultAttributeCountLimit
+ }
+ if sl.EventCountLimit <= 0 {
+ sl.EventCountLimit = DefaultEventCountLimit
+ }
+ if sl.AttributePerEventCountLimit <= 0 {
+ sl.AttributePerEventCountLimit = DefaultAttributePerEventCountLimit
+ }
+ if sl.LinkCountLimit <= 0 {
+ sl.LinkCountLimit = DefaultLinkCountLimit
+ }
+ if sl.AttributePerLinkCountLimit <= 0 {
+ sl.AttributePerLinkCountLimit = DefaultAttributePerLinkCountLimit
+ }
+ return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+ cfg.spanLimits = sl
+ return cfg
+ })
+}
+
+// WithRawSpanLimits returns a TracerProviderOption that configures a
+// TracerProvider to use these limits. These limits bound any Span created by
+// a Tracer from the TracerProvider.
+//
+// The limits will be used as-is. Zero or negative values will not be changed
+// to the default value like WithSpanLimits does. Setting a limit to zero will
+// effectively disable the related resource it limits and setting to a
+// negative value will mean that resource is unlimited. Consequentially, this
+// means that the zero-value SpanLimits will disable all span resources.
+// Because of this, limits should be constructed using NewSpanLimits and
+// updated accordingly.
+//
+// If this or WithSpanLimits are not provided, the TracerProvider will use the
+// limits defined by environment variables, or the defaults if unset. Refer to
+// the NewSpanLimits documentation for information about this relationship.
+func WithRawSpanLimits(limits SpanLimits) TracerProviderOption {
+ return traceProviderOptionFunc(func(cfg tracerProviderConfig) tracerProviderConfig {
+ cfg.spanLimits = limits
+ return cfg
+ })
+}
+
+func applyTracerProviderEnvConfigs(cfg tracerProviderConfig) tracerProviderConfig {
+ for _, opt := range tracerProviderOptionsFromEnv() {
+ cfg = opt.apply(cfg)
+ }
+
+ return cfg
+}
+
+func tracerProviderOptionsFromEnv() []TracerProviderOption {
+ var opts []TracerProviderOption
+
+ sampler, err := samplerFromEnv()
+ if err != nil {
+ otel.Handle(err)
+ }
+
+ if sampler != nil {
+ opts = append(opts, WithSampler(sampler))
+ }
+
+ return opts
+}
+
+// ensureValidTracerProviderConfig ensures that given TracerProviderConfig is valid.
+func ensureValidTracerProviderConfig(cfg tracerProviderConfig) tracerProviderConfig {
+ if cfg.sampler == nil {
+ cfg.sampler = ParentBased(AlwaysSample())
+ }
+ if cfg.idGenerator == nil {
+ cfg.idGenerator = defaultIDGenerator()
+ }
+ if cfg.resource == nil {
+ cfg.resource = resource.Default()
+ }
+ return cfg
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/sampler_env.go b/vendor/go.opentelemetry.io/otel/sdk/trace/sampler_env.go
new file mode 100644
index 0000000..9b672a1
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/sampler_env.go
@@ -0,0 +1,96 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "errors"
+ "os"
+ "strconv"
+ "strings"
+)
+
+const (
+ tracesSamplerKey = "OTEL_TRACES_SAMPLER"
+ tracesSamplerArgKey = "OTEL_TRACES_SAMPLER_ARG"
+
+ samplerAlwaysOn = "always_on"
+ samplerAlwaysOff = "always_off"
+ samplerTraceIDRatio = "traceidratio"
+ samplerParentBasedAlwaysOn = "parentbased_always_on"
+ samplerParsedBasedAlwaysOff = "parentbased_always_off"
+ samplerParentBasedTraceIDRatio = "parentbased_traceidratio"
+)
+
+type errUnsupportedSampler string
+
+func (e errUnsupportedSampler) Error() string {
+ return "unsupported sampler: " + string(e)
+}
+
+var (
+ errNegativeTraceIDRatio = errors.New("invalid trace ID ratio: less than 0.0")
+ errGreaterThanOneTraceIDRatio = errors.New("invalid trace ID ratio: greater than 1.0")
+)
+
+type samplerArgParseError struct {
+ parseErr error
+}
+
+func (e samplerArgParseError) Error() string {
+ return "parsing sampler argument: " + e.parseErr.Error()
+}
+
+func (e samplerArgParseError) Unwrap() error {
+ return e.parseErr
+}
+
+func samplerFromEnv() (Sampler, error) {
+ sampler, ok := os.LookupEnv(tracesSamplerKey)
+ if !ok {
+ return nil, nil
+ }
+
+ sampler = strings.ToLower(strings.TrimSpace(sampler))
+ samplerArg, hasSamplerArg := os.LookupEnv(tracesSamplerArgKey)
+ samplerArg = strings.TrimSpace(samplerArg)
+
+ switch sampler {
+ case samplerAlwaysOn:
+ return AlwaysSample(), nil
+ case samplerAlwaysOff:
+ return NeverSample(), nil
+ case samplerTraceIDRatio:
+ if !hasSamplerArg {
+ return TraceIDRatioBased(1.0), nil
+ }
+ return parseTraceIDRatio(samplerArg)
+ case samplerParentBasedAlwaysOn:
+ return ParentBased(AlwaysSample()), nil
+ case samplerParsedBasedAlwaysOff:
+ return ParentBased(NeverSample()), nil
+ case samplerParentBasedTraceIDRatio:
+ if !hasSamplerArg {
+ return ParentBased(TraceIDRatioBased(1.0)), nil
+ }
+ ratio, err := parseTraceIDRatio(samplerArg)
+ return ParentBased(ratio), err
+ default:
+ return nil, errUnsupportedSampler(sampler)
+ }
+}
+
+func parseTraceIDRatio(arg string) (Sampler, error) {
+ v, err := strconv.ParseFloat(arg, 64)
+ if err != nil {
+ return TraceIDRatioBased(1.0), samplerArgParseError{err}
+ }
+ if v < 0.0 {
+ return TraceIDRatioBased(1.0), errNegativeTraceIDRatio
+ }
+ if v > 1.0 {
+ return TraceIDRatioBased(1.0), errGreaterThanOneTraceIDRatio
+ }
+
+ return TraceIDRatioBased(v), nil
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go b/vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go
new file mode 100644
index 0000000..aa7b262
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/sampling.go
@@ -0,0 +1,282 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "encoding/binary"
+ "fmt"
+
+ "go.opentelemetry.io/otel/attribute"
+ "go.opentelemetry.io/otel/trace"
+)
+
+// Sampler decides whether a trace should be sampled and exported.
+type Sampler interface {
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // ShouldSample returns a SamplingResult based on a decision made from the
+ // passed parameters.
+ ShouldSample(parameters SamplingParameters) SamplingResult
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // Description returns information describing the Sampler.
+ Description() string
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+}
+
+// SamplingParameters contains the values passed to a Sampler.
+type SamplingParameters struct {
+ ParentContext context.Context
+ TraceID trace.TraceID
+ Name string
+ Kind trace.SpanKind
+ Attributes []attribute.KeyValue
+ Links []trace.Link
+}
+
+// SamplingDecision indicates whether a span is dropped, recorded and/or sampled.
+type SamplingDecision uint8
+
+// Valid sampling decisions.
+const (
+ // Drop will not record the span and all attributes/events will be dropped.
+ Drop SamplingDecision = iota
+
+ // RecordOnly indicates the span's IsRecording method returns true, but trace.FlagsSampled flag
+ // must not be set.
+ RecordOnly
+
+ // RecordAndSample indicates the span's IsRecording method returns true and trace.FlagsSampled flag
+ // must be set.
+ RecordAndSample
+)
+
+// SamplingResult conveys a SamplingDecision, set of Attributes and a Tracestate.
+type SamplingResult struct {
+ Decision SamplingDecision
+ Attributes []attribute.KeyValue
+ Tracestate trace.TraceState
+}
+
+type traceIDRatioSampler struct {
+ traceIDUpperBound uint64
+ description string
+}
+
+func (ts traceIDRatioSampler) ShouldSample(p SamplingParameters) SamplingResult {
+ psc := trace.SpanContextFromContext(p.ParentContext)
+ x := binary.BigEndian.Uint64(p.TraceID[8:16]) >> 1
+ if x < ts.traceIDUpperBound {
+ return SamplingResult{
+ Decision: RecordAndSample,
+ Tracestate: psc.TraceState(),
+ }
+ }
+ return SamplingResult{
+ Decision: Drop,
+ Tracestate: psc.TraceState(),
+ }
+}
+
+func (ts traceIDRatioSampler) Description() string {
+ return ts.description
+}
+
+// TraceIDRatioBased samples a given fraction of traces. Fractions >= 1 will
+// always sample. Fractions < 0 are treated as zero. To respect the
+// parent trace's `SampledFlag`, the `TraceIDRatioBased` sampler should be used
+// as a delegate of a `Parent` sampler.
+//
+//nolint:revive // revive complains about stutter of `trace.TraceIDRatioBased`
+func TraceIDRatioBased(fraction float64) Sampler {
+ if fraction >= 1 {
+ return AlwaysSample()
+ }
+
+ if fraction <= 0 {
+ fraction = 0
+ }
+
+ return &traceIDRatioSampler{
+ traceIDUpperBound: uint64(fraction * (1 << 63)),
+ description: fmt.Sprintf("TraceIDRatioBased{%g}", fraction),
+ }
+}
+
+type alwaysOnSampler struct{}
+
+func (as alwaysOnSampler) ShouldSample(p SamplingParameters) SamplingResult {
+ return SamplingResult{
+ Decision: RecordAndSample,
+ Tracestate: trace.SpanContextFromContext(p.ParentContext).TraceState(),
+ }
+}
+
+func (as alwaysOnSampler) Description() string {
+ return "AlwaysOnSampler"
+}
+
+// AlwaysSample returns a Sampler that samples every trace.
+// Be careful about using this sampler in a production application with
+// significant traffic: a new trace will be started and exported for every
+// request.
+func AlwaysSample() Sampler {
+ return alwaysOnSampler{}
+}
+
+type alwaysOffSampler struct{}
+
+func (as alwaysOffSampler) ShouldSample(p SamplingParameters) SamplingResult {
+ return SamplingResult{
+ Decision: Drop,
+ Tracestate: trace.SpanContextFromContext(p.ParentContext).TraceState(),
+ }
+}
+
+func (as alwaysOffSampler) Description() string {
+ return "AlwaysOffSampler"
+}
+
+// NeverSample returns a Sampler that samples no traces.
+func NeverSample() Sampler {
+ return alwaysOffSampler{}
+}
+
+// ParentBased returns a sampler decorator which behaves differently,
+// based on the parent of the span. If the span has no parent,
+// the decorated sampler is used to make sampling decision. If the span has
+// a parent, depending on whether the parent is remote and whether it
+// is sampled, one of the following samplers will apply:
+// - remoteParentSampled(Sampler) (default: AlwaysOn)
+// - remoteParentNotSampled(Sampler) (default: AlwaysOff)
+// - localParentSampled(Sampler) (default: AlwaysOn)
+// - localParentNotSampled(Sampler) (default: AlwaysOff)
+func ParentBased(root Sampler, samplers ...ParentBasedSamplerOption) Sampler {
+ return parentBased{
+ root: root,
+ config: configureSamplersForParentBased(samplers),
+ }
+}
+
+type parentBased struct {
+ root Sampler
+ config samplerConfig
+}
+
+func configureSamplersForParentBased(samplers []ParentBasedSamplerOption) samplerConfig {
+ c := samplerConfig{
+ remoteParentSampled: AlwaysSample(),
+ remoteParentNotSampled: NeverSample(),
+ localParentSampled: AlwaysSample(),
+ localParentNotSampled: NeverSample(),
+ }
+
+ for _, so := range samplers {
+ c = so.apply(c)
+ }
+
+ return c
+}
+
+// samplerConfig is a group of options for parentBased sampler.
+type samplerConfig struct {
+ remoteParentSampled, remoteParentNotSampled Sampler
+ localParentSampled, localParentNotSampled Sampler
+}
+
+// ParentBasedSamplerOption configures the sampler for a particular sampling case.
+type ParentBasedSamplerOption interface {
+ apply(samplerConfig) samplerConfig
+}
+
+// WithRemoteParentSampled sets the sampler for the case of sampled remote parent.
+func WithRemoteParentSampled(s Sampler) ParentBasedSamplerOption {
+ return remoteParentSampledOption{s}
+}
+
+type remoteParentSampledOption struct {
+ s Sampler
+}
+
+func (o remoteParentSampledOption) apply(config samplerConfig) samplerConfig {
+ config.remoteParentSampled = o.s
+ return config
+}
+
+// WithRemoteParentNotSampled sets the sampler for the case of remote parent
+// which is not sampled.
+func WithRemoteParentNotSampled(s Sampler) ParentBasedSamplerOption {
+ return remoteParentNotSampledOption{s}
+}
+
+type remoteParentNotSampledOption struct {
+ s Sampler
+}
+
+func (o remoteParentNotSampledOption) apply(config samplerConfig) samplerConfig {
+ config.remoteParentNotSampled = o.s
+ return config
+}
+
+// WithLocalParentSampled sets the sampler for the case of sampled local parent.
+func WithLocalParentSampled(s Sampler) ParentBasedSamplerOption {
+ return localParentSampledOption{s}
+}
+
+type localParentSampledOption struct {
+ s Sampler
+}
+
+func (o localParentSampledOption) apply(config samplerConfig) samplerConfig {
+ config.localParentSampled = o.s
+ return config
+}
+
+// WithLocalParentNotSampled sets the sampler for the case of local parent
+// which is not sampled.
+func WithLocalParentNotSampled(s Sampler) ParentBasedSamplerOption {
+ return localParentNotSampledOption{s}
+}
+
+type localParentNotSampledOption struct {
+ s Sampler
+}
+
+func (o localParentNotSampledOption) apply(config samplerConfig) samplerConfig {
+ config.localParentNotSampled = o.s
+ return config
+}
+
+func (pb parentBased) ShouldSample(p SamplingParameters) SamplingResult {
+ psc := trace.SpanContextFromContext(p.ParentContext)
+ if psc.IsValid() {
+ if psc.IsRemote() {
+ if psc.IsSampled() {
+ return pb.config.remoteParentSampled.ShouldSample(p)
+ }
+ return pb.config.remoteParentNotSampled.ShouldSample(p)
+ }
+
+ if psc.IsSampled() {
+ return pb.config.localParentSampled.ShouldSample(p)
+ }
+ return pb.config.localParentNotSampled.ShouldSample(p)
+ }
+ return pb.root.ShouldSample(p)
+}
+
+func (pb parentBased) Description() string {
+ return fmt.Sprintf("ParentBased{root:%s,remoteParentSampled:%s,"+
+ "remoteParentNotSampled:%s,localParentSampled:%s,localParentNotSampled:%s}",
+ pb.root.Description(),
+ pb.config.remoteParentSampled.Description(),
+ pb.config.remoteParentNotSampled.Description(),
+ pb.config.localParentSampled.Description(),
+ pb.config.localParentNotSampled.Description(),
+ )
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go b/vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go
new file mode 100644
index 0000000..664e13e
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/simple_span_processor.go
@@ -0,0 +1,121 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "sync"
+
+ "go.opentelemetry.io/otel"
+ "go.opentelemetry.io/otel/internal/global"
+)
+
+// simpleSpanProcessor is a SpanProcessor that synchronously sends all
+// completed Spans to a trace.Exporter immediately.
+type simpleSpanProcessor struct {
+ exporterMu sync.Mutex
+ exporter SpanExporter
+ stopOnce sync.Once
+}
+
+var _ SpanProcessor = (*simpleSpanProcessor)(nil)
+
+// NewSimpleSpanProcessor returns a new SpanProcessor that will synchronously
+// send completed spans to the exporter immediately.
+//
+// This SpanProcessor is not recommended for production use. The synchronous
+// nature of this SpanProcessor makes it good for testing, debugging, or showing
+// examples of other features, but it will be slow and have a high computation
+// resource usage overhead. The BatchSpanProcessor is recommended for production
+// use instead.
+func NewSimpleSpanProcessor(exporter SpanExporter) SpanProcessor {
+ ssp := &simpleSpanProcessor{
+ exporter: exporter,
+ }
+ global.Warn("SimpleSpanProcessor is not recommended for production use, consider using BatchSpanProcessor instead.")
+
+ return ssp
+}
+
+// OnStart does nothing.
+func (ssp *simpleSpanProcessor) OnStart(context.Context, ReadWriteSpan) {}
+
+// OnEnd immediately exports a ReadOnlySpan.
+func (ssp *simpleSpanProcessor) OnEnd(s ReadOnlySpan) {
+ ssp.exporterMu.Lock()
+ defer ssp.exporterMu.Unlock()
+
+ if ssp.exporter != nil && s.SpanContext().TraceFlags().IsSampled() {
+ if err := ssp.exporter.ExportSpans(context.Background(), []ReadOnlySpan{s}); err != nil {
+ otel.Handle(err)
+ }
+ }
+}
+
+// Shutdown shuts down the exporter this SimpleSpanProcessor exports to.
+func (ssp *simpleSpanProcessor) Shutdown(ctx context.Context) error {
+ var err error
+ ssp.stopOnce.Do(func() {
+ stopFunc := func(exp SpanExporter) (<-chan error, func()) {
+ done := make(chan error, 1)
+ return done, func() { done <- exp.Shutdown(ctx) }
+ }
+
+ // The exporter field of the simpleSpanProcessor needs to be zeroed to
+ // signal it is shut down, meaning all subsequent calls to OnEnd will
+ // be gracefully ignored. This needs to be done synchronously to avoid
+ // any race condition.
+ //
+ // A closure is used to keep reference to the exporter and then the
+ // field is zeroed. This ensures the simpleSpanProcessor is shut down
+ // before the exporter. This order is important as it avoids a potential
+ // deadlock. If the exporter shut down operation generates a span, that
+ // span would need to be exported. Meaning, OnEnd would be called and
+ // try acquiring the lock that is held here.
+ ssp.exporterMu.Lock()
+ done, shutdown := stopFunc(ssp.exporter)
+ ssp.exporter = nil
+ ssp.exporterMu.Unlock()
+
+ go shutdown()
+
+ // Wait for the exporter to shut down or the deadline to expire.
+ select {
+ case err = <-done:
+ case <-ctx.Done():
+ // It is possible for the exporter to have immediately shut down and
+ // the context to be done simultaneously. In that case this outer
+ // select statement will randomly choose a case. This will result in
+ // a different returned error for similar scenarios. Instead, double
+ // check if the exporter shut down at the same time and return that
+ // error if so. This will ensure consistency as well as ensure
+ // the caller knows the exporter shut down successfully (they can
+ // already determine if the deadline is expired given they passed
+ // the context).
+ select {
+ case err = <-done:
+ default:
+ err = ctx.Err()
+ }
+ }
+ })
+ return err
+}
+
+// ForceFlush does nothing as there is no data to flush.
+func (ssp *simpleSpanProcessor) ForceFlush(context.Context) error {
+ return nil
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent
+// this Span Processor.
+func (ssp *simpleSpanProcessor) MarshalLog() interface{} {
+ return struct {
+ Type string
+ Exporter SpanExporter
+ }{
+ Type: "SimpleSpanProcessor",
+ Exporter: ssp.exporter,
+ }
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/snapshot.go b/vendor/go.opentelemetry.io/otel/sdk/trace/snapshot.go
new file mode 100644
index 0000000..d511d0f
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/snapshot.go
@@ -0,0 +1,133 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "time"
+
+ "go.opentelemetry.io/otel/attribute"
+ "go.opentelemetry.io/otel/sdk/instrumentation"
+ "go.opentelemetry.io/otel/sdk/resource"
+ "go.opentelemetry.io/otel/trace"
+)
+
+// snapshot is an record of a spans state at a particular checkpointed time.
+// It is used as a read-only representation of that state.
+type snapshot struct {
+ name string
+ spanContext trace.SpanContext
+ parent trace.SpanContext
+ spanKind trace.SpanKind
+ startTime time.Time
+ endTime time.Time
+ attributes []attribute.KeyValue
+ events []Event
+ links []Link
+ status Status
+ childSpanCount int
+ droppedAttributeCount int
+ droppedEventCount int
+ droppedLinkCount int
+ resource *resource.Resource
+ instrumentationScope instrumentation.Scope
+}
+
+var _ ReadOnlySpan = snapshot{}
+
+func (s snapshot) private() {}
+
+// Name returns the name of the span.
+func (s snapshot) Name() string {
+ return s.name
+}
+
+// SpanContext returns the unique SpanContext that identifies the span.
+func (s snapshot) SpanContext() trace.SpanContext {
+ return s.spanContext
+}
+
+// Parent returns the unique SpanContext that identifies the parent of the
+// span if one exists. If the span has no parent the returned SpanContext
+// will be invalid.
+func (s snapshot) Parent() trace.SpanContext {
+ return s.parent
+}
+
+// SpanKind returns the role the span plays in a Trace.
+func (s snapshot) SpanKind() trace.SpanKind {
+ return s.spanKind
+}
+
+// StartTime returns the time the span started recording.
+func (s snapshot) StartTime() time.Time {
+ return s.startTime
+}
+
+// EndTime returns the time the span stopped recording. It will be zero if
+// the span has not ended.
+func (s snapshot) EndTime() time.Time {
+ return s.endTime
+}
+
+// Attributes returns the defining attributes of the span.
+func (s snapshot) Attributes() []attribute.KeyValue {
+ return s.attributes
+}
+
+// Links returns all the links the span has to other spans.
+func (s snapshot) Links() []Link {
+ return s.links
+}
+
+// Events returns all the events that occurred within in the spans
+// lifetime.
+func (s snapshot) Events() []Event {
+ return s.events
+}
+
+// Status returns the spans status.
+func (s snapshot) Status() Status {
+ return s.status
+}
+
+// InstrumentationScope returns information about the instrumentation
+// scope that created the span.
+func (s snapshot) InstrumentationScope() instrumentation.Scope {
+ return s.instrumentationScope
+}
+
+// InstrumentationLibrary returns information about the instrumentation
+// library that created the span.
+func (s snapshot) InstrumentationLibrary() instrumentation.Library { //nolint:staticcheck // This method needs to be define for backwards compatibility
+ return s.instrumentationScope
+}
+
+// Resource returns information about the entity that produced the span.
+func (s snapshot) Resource() *resource.Resource {
+ return s.resource
+}
+
+// DroppedAttributes returns the number of attributes dropped by the span
+// due to limits being reached.
+func (s snapshot) DroppedAttributes() int {
+ return s.droppedAttributeCount
+}
+
+// DroppedLinks returns the number of links dropped by the span due to limits
+// being reached.
+func (s snapshot) DroppedLinks() int {
+ return s.droppedLinkCount
+}
+
+// DroppedEvents returns the number of events dropped by the span due to
+// limits being reached.
+func (s snapshot) DroppedEvents() int {
+ return s.droppedEventCount
+}
+
+// ChildSpanCount returns the count of spans that consider the span a
+// direct parent.
+func (s snapshot) ChildSpanCount() int {
+ return s.childSpanCount
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span.go
new file mode 100644
index 0000000..1785a4b
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span.go
@@ -0,0 +1,937 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "fmt"
+ "reflect"
+ "runtime"
+ rt "runtime/trace"
+ "slices"
+ "strings"
+ "sync"
+ "time"
+ "unicode/utf8"
+
+ "go.opentelemetry.io/otel/attribute"
+ "go.opentelemetry.io/otel/codes"
+ "go.opentelemetry.io/otel/internal/global"
+ "go.opentelemetry.io/otel/sdk/instrumentation"
+ "go.opentelemetry.io/otel/sdk/resource"
+ semconv "go.opentelemetry.io/otel/semconv/v1.34.0"
+ "go.opentelemetry.io/otel/trace"
+ "go.opentelemetry.io/otel/trace/embedded"
+)
+
+// ReadOnlySpan allows reading information from the data structure underlying a
+// trace.Span. It is used in places where reading information from a span is
+// necessary but changing the span isn't necessary or allowed.
+//
+// Warning: methods may be added to this interface in minor releases.
+type ReadOnlySpan interface {
+ // Name returns the name of the span.
+ Name() string
+ // SpanContext returns the unique SpanContext that identifies the span.
+ SpanContext() trace.SpanContext
+ // Parent returns the unique SpanContext that identifies the parent of the
+ // span if one exists. If the span has no parent the returned SpanContext
+ // will be invalid.
+ Parent() trace.SpanContext
+ // SpanKind returns the role the span plays in a Trace.
+ SpanKind() trace.SpanKind
+ // StartTime returns the time the span started recording.
+ StartTime() time.Time
+ // EndTime returns the time the span stopped recording. It will be zero if
+ // the span has not ended.
+ EndTime() time.Time
+ // Attributes returns the defining attributes of the span.
+ // The order of the returned attributes is not guaranteed to be stable across invocations.
+ Attributes() []attribute.KeyValue
+ // Links returns all the links the span has to other spans.
+ Links() []Link
+ // Events returns all the events that occurred within in the spans
+ // lifetime.
+ Events() []Event
+ // Status returns the spans status.
+ Status() Status
+ // InstrumentationScope returns information about the instrumentation
+ // scope that created the span.
+ InstrumentationScope() instrumentation.Scope
+ // InstrumentationLibrary returns information about the instrumentation
+ // library that created the span.
+ // Deprecated: please use InstrumentationScope instead.
+ InstrumentationLibrary() instrumentation.Library //nolint:staticcheck // This method needs to be define for backwards compatibility
+ // Resource returns information about the entity that produced the span.
+ Resource() *resource.Resource
+ // DroppedAttributes returns the number of attributes dropped by the span
+ // due to limits being reached.
+ DroppedAttributes() int
+ // DroppedLinks returns the number of links dropped by the span due to
+ // limits being reached.
+ DroppedLinks() int
+ // DroppedEvents returns the number of events dropped by the span due to
+ // limits being reached.
+ DroppedEvents() int
+ // ChildSpanCount returns the count of spans that consider the span a
+ // direct parent.
+ ChildSpanCount() int
+
+ // A private method to prevent users implementing the
+ // interface and so future additions to it will not
+ // violate compatibility.
+ private()
+}
+
+// ReadWriteSpan exposes the same methods as trace.Span and in addition allows
+// reading information from the underlying data structure.
+// This interface exposes the union of the methods of trace.Span (which is a
+// "write-only" span) and ReadOnlySpan. New methods for writing or reading span
+// information should be added under trace.Span or ReadOnlySpan, respectively.
+//
+// Warning: methods may be added to this interface in minor releases.
+type ReadWriteSpan interface {
+ trace.Span
+ ReadOnlySpan
+}
+
+// recordingSpan is an implementation of the OpenTelemetry Span API
+// representing the individual component of a trace that is sampled.
+type recordingSpan struct {
+ embedded.Span
+
+ // mu protects the contents of this span.
+ mu sync.Mutex
+
+ // parent holds the parent span of this span as a trace.SpanContext.
+ parent trace.SpanContext
+
+ // spanKind represents the kind of this span as a trace.SpanKind.
+ spanKind trace.SpanKind
+
+ // name is the name of this span.
+ name string
+
+ // startTime is the time at which this span was started.
+ startTime time.Time
+
+ // endTime is the time at which this span was ended. It contains the zero
+ // value of time.Time until the span is ended.
+ endTime time.Time
+
+ // status is the status of this span.
+ status Status
+
+ // childSpanCount holds the number of child spans created for this span.
+ childSpanCount int
+
+ // spanContext holds the SpanContext of this span.
+ spanContext trace.SpanContext
+
+ // attributes is a collection of user provided key/values. The collection
+ // is constrained by a configurable maximum held by the parent
+ // TracerProvider. When additional attributes are added after this maximum
+ // is reached these attributes the user is attempting to add are dropped.
+ // This dropped number of attributes is tracked and reported in the
+ // ReadOnlySpan exported when the span ends.
+ attributes []attribute.KeyValue
+ droppedAttributes int
+ logDropAttrsOnce sync.Once
+
+ // events are stored in FIFO queue capped by configured limit.
+ events evictedQueue[Event]
+
+ // links are stored in FIFO queue capped by configured limit.
+ links evictedQueue[Link]
+
+ // executionTracerTaskEnd ends the execution tracer span.
+ executionTracerTaskEnd func()
+
+ // tracer is the SDK tracer that created this span.
+ tracer *tracer
+}
+
+var (
+ _ ReadWriteSpan = (*recordingSpan)(nil)
+ _ runtimeTracer = (*recordingSpan)(nil)
+)
+
+// SpanContext returns the SpanContext of this span.
+func (s *recordingSpan) SpanContext() trace.SpanContext {
+ if s == nil {
+ return trace.SpanContext{}
+ }
+ return s.spanContext
+}
+
+// IsRecording returns if this span is being recorded. If this span has ended
+// this will return false.
+func (s *recordingSpan) IsRecording() bool {
+ if s == nil {
+ return false
+ }
+ s.mu.Lock()
+ defer s.mu.Unlock()
+
+ return s.isRecording()
+}
+
+// isRecording returns if this span is being recorded. If this span has ended
+// this will return false.
+//
+// This method assumes s.mu.Lock is held by the caller.
+func (s *recordingSpan) isRecording() bool {
+ if s == nil {
+ return false
+ }
+ return s.endTime.IsZero()
+}
+
+// SetStatus sets the status of the Span in the form of a code and a
+// description, overriding previous values set. The description is only
+// included in the set status when the code is for an error. If this span is
+// not being recorded than this method does nothing.
+func (s *recordingSpan) SetStatus(code codes.Code, description string) {
+ if s == nil {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+ if s.status.Code > code {
+ return
+ }
+
+ status := Status{Code: code}
+ if code == codes.Error {
+ status.Description = description
+ }
+
+ s.status = status
+}
+
+// SetAttributes sets attributes of this span.
+//
+// If a key from attributes already exists the value associated with that key
+// will be overwritten with the value contained in attributes.
+//
+// If this span is not being recorded than this method does nothing.
+//
+// If adding attributes to the span would exceed the maximum amount of
+// attributes the span is configured to have, the last added attributes will
+// be dropped.
+func (s *recordingSpan) SetAttributes(attributes ...attribute.KeyValue) {
+ if s == nil || len(attributes) == 0 {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+
+ limit := s.tracer.provider.spanLimits.AttributeCountLimit
+ if limit == 0 {
+ // No attributes allowed.
+ s.addDroppedAttr(len(attributes))
+ return
+ }
+
+ // If adding these attributes could exceed the capacity of s perform a
+ // de-duplication and truncation while adding to avoid over allocation.
+ if limit > 0 && len(s.attributes)+len(attributes) > limit {
+ s.addOverCapAttrs(limit, attributes)
+ return
+ }
+
+ // Otherwise, add without deduplication. When attributes are read they
+ // will be deduplicated, optimizing the operation.
+ s.attributes = slices.Grow(s.attributes, len(attributes))
+ for _, a := range attributes {
+ if !a.Valid() {
+ // Drop all invalid attributes.
+ s.addDroppedAttr(1)
+ continue
+ }
+ a = truncateAttr(s.tracer.provider.spanLimits.AttributeValueLengthLimit, a)
+ s.attributes = append(s.attributes, a)
+ }
+}
+
+// Declared as a var so tests can override.
+var logDropAttrs = func() {
+ global.Warn("limit reached: dropping trace Span attributes")
+}
+
+// addDroppedAttr adds incr to the count of dropped attributes.
+//
+// The first, and only the first, time this method is called a warning will be
+// logged.
+//
+// This method assumes s.mu.Lock is held by the caller.
+func (s *recordingSpan) addDroppedAttr(incr int) {
+ s.droppedAttributes += incr
+ s.logDropAttrsOnce.Do(logDropAttrs)
+}
+
+// addOverCapAttrs adds the attributes attrs to the span s while
+// de-duplicating the attributes of s and attrs and dropping attributes that
+// exceed the limit.
+//
+// This method assumes s.mu.Lock is held by the caller.
+//
+// This method should only be called when there is a possibility that adding
+// attrs to s will exceed the limit. Otherwise, attrs should be added to s
+// without checking for duplicates and all retrieval methods of the attributes
+// for s will de-duplicate as needed.
+//
+// This method assumes limit is a value > 0. The argument should be validated
+// by the caller.
+func (s *recordingSpan) addOverCapAttrs(limit int, attrs []attribute.KeyValue) {
+ // In order to not allocate more capacity to s.attributes than needed,
+ // prune and truncate this addition of attributes while adding.
+
+ // Do not set a capacity when creating this map. Benchmark testing has
+ // showed this to only add unused memory allocations in general use.
+ exists := make(map[attribute.Key]int, len(s.attributes))
+ s.dedupeAttrsFromRecord(exists)
+
+ // Now that s.attributes is deduplicated, adding unique attributes up to
+ // the capacity of s will not over allocate s.attributes.
+
+ // max size = limit
+ maxCap := min(len(attrs)+len(s.attributes), limit)
+ if cap(s.attributes) < maxCap {
+ s.attributes = slices.Grow(s.attributes, maxCap-cap(s.attributes))
+ }
+ for _, a := range attrs {
+ if !a.Valid() {
+ // Drop all invalid attributes.
+ s.addDroppedAttr(1)
+ continue
+ }
+
+ if idx, ok := exists[a.Key]; ok {
+ // Perform all updates before dropping, even when at capacity.
+ a = truncateAttr(s.tracer.provider.spanLimits.AttributeValueLengthLimit, a)
+ s.attributes[idx] = a
+ continue
+ }
+
+ if len(s.attributes) >= limit {
+ // Do not just drop all of the remaining attributes, make sure
+ // updates are checked and performed.
+ s.addDroppedAttr(1)
+ } else {
+ a = truncateAttr(s.tracer.provider.spanLimits.AttributeValueLengthLimit, a)
+ s.attributes = append(s.attributes, a)
+ exists[a.Key] = len(s.attributes) - 1
+ }
+ }
+}
+
+// truncateAttr returns a truncated version of attr. Only string and string
+// slice attribute values are truncated. String values are truncated to at
+// most a length of limit. Each string slice value is truncated in this fashion
+// (the slice length itself is unaffected).
+//
+// No truncation is performed for a negative limit.
+func truncateAttr(limit int, attr attribute.KeyValue) attribute.KeyValue {
+ if limit < 0 {
+ return attr
+ }
+ switch attr.Value.Type() {
+ case attribute.STRING:
+ v := attr.Value.AsString()
+ return attr.Key.String(truncate(limit, v))
+ case attribute.STRINGSLICE:
+ v := attr.Value.AsStringSlice()
+ for i := range v {
+ v[i] = truncate(limit, v[i])
+ }
+ return attr.Key.StringSlice(v)
+ }
+ return attr
+}
+
+// truncate returns a truncated version of s such that it contains less than
+// the limit number of characters. Truncation is applied by returning the limit
+// number of valid characters contained in s.
+//
+// If limit is negative, it returns the original string.
+//
+// UTF-8 is supported. When truncating, all invalid characters are dropped
+// before applying truncation.
+//
+// If s already contains less than the limit number of bytes, it is returned
+// unchanged. No invalid characters are removed.
+func truncate(limit int, s string) string {
+ // This prioritize performance in the following order based on the most
+ // common expected use-cases.
+ //
+ // - Short values less than the default limit (128).
+ // - Strings with valid encodings that exceed the limit.
+ // - No limit.
+ // - Strings with invalid encodings that exceed the limit.
+ if limit < 0 || len(s) <= limit {
+ return s
+ }
+
+ // Optimistically, assume all valid UTF-8.
+ var b strings.Builder
+ count := 0
+ for i, c := range s {
+ if c != utf8.RuneError {
+ count++
+ if count > limit {
+ return s[:i]
+ }
+ continue
+ }
+
+ _, size := utf8.DecodeRuneInString(s[i:])
+ if size == 1 {
+ // Invalid encoding.
+ b.Grow(len(s) - 1)
+ _, _ = b.WriteString(s[:i])
+ s = s[i:]
+ break
+ }
+ }
+
+ // Fast-path, no invalid input.
+ if b.Cap() == 0 {
+ return s
+ }
+
+ // Truncate while validating UTF-8.
+ for i := 0; i < len(s) && count < limit; {
+ c := s[i]
+ if c < utf8.RuneSelf {
+ // Optimization for single byte runes (common case).
+ _ = b.WriteByte(c)
+ i++
+ count++
+ continue
+ }
+
+ _, size := utf8.DecodeRuneInString(s[i:])
+ if size == 1 {
+ // We checked for all 1-byte runes above, this is a RuneError.
+ i++
+ continue
+ }
+
+ _, _ = b.WriteString(s[i : i+size])
+ i += size
+ count++
+ }
+
+ return b.String()
+}
+
+// End ends the span. This method does nothing if the span is already ended or
+// is not being recorded.
+//
+// The only SpanEndOption currently supported are [trace.WithTimestamp], and
+// [trace.WithStackTrace].
+//
+// If this method is called while panicking an error event is added to the
+// Span before ending it and the panic is continued.
+func (s *recordingSpan) End(options ...trace.SpanEndOption) {
+ // Do not start by checking if the span is being recorded which requires
+ // acquiring a lock. Make a minimal check that the span is not nil.
+ if s == nil {
+ return
+ }
+
+ // Store the end time as soon as possible to avoid artificially increasing
+ // the span's duration in case some operation below takes a while.
+ et := monotonicEndTime(s.startTime)
+
+ // Lock the span now that we have an end time and see if we need to do any more processing.
+ s.mu.Lock()
+ if !s.isRecording() {
+ s.mu.Unlock()
+ return
+ }
+
+ config := trace.NewSpanEndConfig(options...)
+ if recovered := recover(); recovered != nil {
+ // Record but don't stop the panic.
+ defer panic(recovered)
+ opts := []trace.EventOption{
+ trace.WithAttributes(
+ semconv.ExceptionType(typeStr(recovered)),
+ semconv.ExceptionMessage(fmt.Sprint(recovered)),
+ ),
+ }
+
+ if config.StackTrace() {
+ opts = append(opts, trace.WithAttributes(
+ semconv.ExceptionStacktrace(recordStackTrace()),
+ ))
+ }
+
+ s.addEvent(semconv.ExceptionEventName, opts...)
+ }
+
+ if s.executionTracerTaskEnd != nil {
+ s.mu.Unlock()
+ s.executionTracerTaskEnd()
+ s.mu.Lock()
+ }
+
+ // Setting endTime to non-zero marks the span as ended and not recording.
+ if config.Timestamp().IsZero() {
+ s.endTime = et
+ } else {
+ s.endTime = config.Timestamp()
+ }
+ s.mu.Unlock()
+
+ sps := s.tracer.provider.getSpanProcessors()
+ if len(sps) == 0 {
+ return
+ }
+ snap := s.snapshot()
+ for _, sp := range sps {
+ sp.sp.OnEnd(snap)
+ }
+}
+
+// monotonicEndTime returns the end time at present but offset from start,
+// monotonically.
+//
+// The monotonic clock is used in subtractions hence the duration since start
+// added back to start gives end as a monotonic time. See
+// https://golang.org/pkg/time/#hdr-Monotonic_Clocks
+func monotonicEndTime(start time.Time) time.Time {
+ return start.Add(time.Since(start))
+}
+
+// RecordError will record err as a span event for this span. An additional call to
+// SetStatus is required if the Status of the Span should be set to Error, this method
+// does not change the Span status. If this span is not being recorded or err is nil
+// than this method does nothing.
+func (s *recordingSpan) RecordError(err error, opts ...trace.EventOption) {
+ if s == nil || err == nil {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+
+ opts = append(opts, trace.WithAttributes(
+ semconv.ExceptionType(typeStr(err)),
+ semconv.ExceptionMessage(err.Error()),
+ ))
+
+ c := trace.NewEventConfig(opts...)
+ if c.StackTrace() {
+ opts = append(opts, trace.WithAttributes(
+ semconv.ExceptionStacktrace(recordStackTrace()),
+ ))
+ }
+
+ s.addEvent(semconv.ExceptionEventName, opts...)
+}
+
+func typeStr(i interface{}) string {
+ t := reflect.TypeOf(i)
+ if t.PkgPath() == "" && t.Name() == "" {
+ // Likely a builtin type.
+ return t.String()
+ }
+ return fmt.Sprintf("%s.%s", t.PkgPath(), t.Name())
+}
+
+func recordStackTrace() string {
+ stackTrace := make([]byte, 2048)
+ n := runtime.Stack(stackTrace, false)
+
+ return string(stackTrace[0:n])
+}
+
+// AddEvent adds an event with the provided name and options. If this span is
+// not being recorded then this method does nothing.
+func (s *recordingSpan) AddEvent(name string, o ...trace.EventOption) {
+ if s == nil {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+ s.addEvent(name, o...)
+}
+
+// addEvent adds an event with the provided name and options.
+//
+// This method assumes s.mu.Lock is held by the caller.
+func (s *recordingSpan) addEvent(name string, o ...trace.EventOption) {
+ c := trace.NewEventConfig(o...)
+ e := Event{Name: name, Attributes: c.Attributes(), Time: c.Timestamp()}
+
+ // Discard attributes over limit.
+ limit := s.tracer.provider.spanLimits.AttributePerEventCountLimit
+ if limit == 0 {
+ // Drop all attributes.
+ e.DroppedAttributeCount = len(e.Attributes)
+ e.Attributes = nil
+ } else if limit > 0 && len(e.Attributes) > limit {
+ // Drop over capacity.
+ e.DroppedAttributeCount = len(e.Attributes) - limit
+ e.Attributes = e.Attributes[:limit]
+ }
+
+ s.events.add(e)
+}
+
+// SetName sets the name of this span. If this span is not being recorded than
+// this method does nothing.
+func (s *recordingSpan) SetName(name string) {
+ if s == nil {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+ s.name = name
+}
+
+// Name returns the name of this span.
+func (s *recordingSpan) Name() string {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.name
+}
+
+// Name returns the SpanContext of this span's parent span.
+func (s *recordingSpan) Parent() trace.SpanContext {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.parent
+}
+
+// SpanKind returns the SpanKind of this span.
+func (s *recordingSpan) SpanKind() trace.SpanKind {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.spanKind
+}
+
+// StartTime returns the time this span started.
+func (s *recordingSpan) StartTime() time.Time {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.startTime
+}
+
+// EndTime returns the time this span ended. For spans that have not yet
+// ended, the returned value will be the zero value of time.Time.
+func (s *recordingSpan) EndTime() time.Time {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.endTime
+}
+
+// Attributes returns the attributes of this span.
+//
+// The order of the returned attributes is not guaranteed to be stable.
+func (s *recordingSpan) Attributes() []attribute.KeyValue {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ s.dedupeAttrs()
+ return s.attributes
+}
+
+// dedupeAttrs deduplicates the attributes of s to fit capacity.
+//
+// This method assumes s.mu.Lock is held by the caller.
+func (s *recordingSpan) dedupeAttrs() {
+ // Do not set a capacity when creating this map. Benchmark testing has
+ // showed this to only add unused memory allocations in general use.
+ exists := make(map[attribute.Key]int, len(s.attributes))
+ s.dedupeAttrsFromRecord(exists)
+}
+
+// dedupeAttrsFromRecord deduplicates the attributes of s to fit capacity
+// using record as the record of unique attribute keys to their index.
+//
+// This method assumes s.mu.Lock is held by the caller.
+func (s *recordingSpan) dedupeAttrsFromRecord(record map[attribute.Key]int) {
+ // Use the fact that slices share the same backing array.
+ unique := s.attributes[:0]
+ for _, a := range s.attributes {
+ if idx, ok := record[a.Key]; ok {
+ unique[idx] = a
+ } else {
+ unique = append(unique, a)
+ record[a.Key] = len(unique) - 1
+ }
+ }
+ clear(s.attributes[len(unique):]) // Erase unneeded elements to let GC collect objects.
+ s.attributes = unique
+}
+
+// Links returns the links of this span.
+func (s *recordingSpan) Links() []Link {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if len(s.links.queue) == 0 {
+ return []Link{}
+ }
+ return s.links.copy()
+}
+
+// Events returns the events of this span.
+func (s *recordingSpan) Events() []Event {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if len(s.events.queue) == 0 {
+ return []Event{}
+ }
+ return s.events.copy()
+}
+
+// Status returns the status of this span.
+func (s *recordingSpan) Status() Status {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.status
+}
+
+// InstrumentationScope returns the instrumentation.Scope associated with
+// the Tracer that created this span.
+func (s *recordingSpan) InstrumentationScope() instrumentation.Scope {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.tracer.instrumentationScope
+}
+
+// InstrumentationLibrary returns the instrumentation.Library associated with
+// the Tracer that created this span.
+func (s *recordingSpan) InstrumentationLibrary() instrumentation.Library { //nolint:staticcheck // This method needs to be define for backwards compatibility
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.tracer.instrumentationScope
+}
+
+// Resource returns the Resource associated with the Tracer that created this
+// span.
+func (s *recordingSpan) Resource() *resource.Resource {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.tracer.provider.resource
+}
+
+func (s *recordingSpan) AddLink(link trace.Link) {
+ if s == nil {
+ return
+ }
+ if !link.SpanContext.IsValid() && len(link.Attributes) == 0 &&
+ link.SpanContext.TraceState().Len() == 0 {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+
+ l := Link{SpanContext: link.SpanContext, Attributes: link.Attributes}
+
+ // Discard attributes over limit.
+ limit := s.tracer.provider.spanLimits.AttributePerLinkCountLimit
+ if limit == 0 {
+ // Drop all attributes.
+ l.DroppedAttributeCount = len(l.Attributes)
+ l.Attributes = nil
+ } else if limit > 0 && len(l.Attributes) > limit {
+ l.DroppedAttributeCount = len(l.Attributes) - limit
+ l.Attributes = l.Attributes[:limit]
+ }
+
+ s.links.add(l)
+}
+
+// DroppedAttributes returns the number of attributes dropped by the span
+// due to limits being reached.
+func (s *recordingSpan) DroppedAttributes() int {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.droppedAttributes
+}
+
+// DroppedLinks returns the number of links dropped by the span due to limits
+// being reached.
+func (s *recordingSpan) DroppedLinks() int {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.links.droppedCount
+}
+
+// DroppedEvents returns the number of events dropped by the span due to
+// limits being reached.
+func (s *recordingSpan) DroppedEvents() int {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.events.droppedCount
+}
+
+// ChildSpanCount returns the count of spans that consider the span a
+// direct parent.
+func (s *recordingSpan) ChildSpanCount() int {
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ return s.childSpanCount
+}
+
+// TracerProvider returns a trace.TracerProvider that can be used to generate
+// additional Spans on the same telemetry pipeline as the current Span.
+func (s *recordingSpan) TracerProvider() trace.TracerProvider {
+ return s.tracer.provider
+}
+
+// snapshot creates a read-only copy of the current state of the span.
+func (s *recordingSpan) snapshot() ReadOnlySpan {
+ var sd snapshot
+ s.mu.Lock()
+ defer s.mu.Unlock()
+
+ sd.endTime = s.endTime
+ sd.instrumentationScope = s.tracer.instrumentationScope
+ sd.name = s.name
+ sd.parent = s.parent
+ sd.resource = s.tracer.provider.resource
+ sd.spanContext = s.spanContext
+ sd.spanKind = s.spanKind
+ sd.startTime = s.startTime
+ sd.status = s.status
+ sd.childSpanCount = s.childSpanCount
+
+ if len(s.attributes) > 0 {
+ s.dedupeAttrs()
+ sd.attributes = s.attributes
+ }
+ sd.droppedAttributeCount = s.droppedAttributes
+ if len(s.events.queue) > 0 {
+ sd.events = s.events.copy()
+ sd.droppedEventCount = s.events.droppedCount
+ }
+ if len(s.links.queue) > 0 {
+ sd.links = s.links.copy()
+ sd.droppedLinkCount = s.links.droppedCount
+ }
+ return &sd
+}
+
+func (s *recordingSpan) addChild() {
+ if s == nil {
+ return
+ }
+
+ s.mu.Lock()
+ defer s.mu.Unlock()
+ if !s.isRecording() {
+ return
+ }
+ s.childSpanCount++
+}
+
+func (*recordingSpan) private() {}
+
+// runtimeTrace starts a "runtime/trace".Task for the span and returns a
+// context containing the task.
+func (s *recordingSpan) runtimeTrace(ctx context.Context) context.Context {
+ if !rt.IsEnabled() {
+ // Avoid additional overhead if runtime/trace is not enabled.
+ return ctx
+ }
+ nctx, task := rt.NewTask(ctx, s.name)
+
+ s.mu.Lock()
+ s.executionTracerTaskEnd = task.End
+ s.mu.Unlock()
+
+ return nctx
+}
+
+// nonRecordingSpan is a minimal implementation of the OpenTelemetry Span API
+// that wraps a SpanContext. It performs no operations other than to return
+// the wrapped SpanContext or TracerProvider that created it.
+type nonRecordingSpan struct {
+ embedded.Span
+
+ // tracer is the SDK tracer that created this span.
+ tracer *tracer
+ sc trace.SpanContext
+}
+
+var _ trace.Span = nonRecordingSpan{}
+
+// SpanContext returns the wrapped SpanContext.
+func (s nonRecordingSpan) SpanContext() trace.SpanContext { return s.sc }
+
+// IsRecording always returns false.
+func (nonRecordingSpan) IsRecording() bool { return false }
+
+// SetStatus does nothing.
+func (nonRecordingSpan) SetStatus(codes.Code, string) {}
+
+// SetError does nothing.
+func (nonRecordingSpan) SetError(bool) {}
+
+// SetAttributes does nothing.
+func (nonRecordingSpan) SetAttributes(...attribute.KeyValue) {}
+
+// End does nothing.
+func (nonRecordingSpan) End(...trace.SpanEndOption) {}
+
+// RecordError does nothing.
+func (nonRecordingSpan) RecordError(error, ...trace.EventOption) {}
+
+// AddEvent does nothing.
+func (nonRecordingSpan) AddEvent(string, ...trace.EventOption) {}
+
+// AddLink does nothing.
+func (nonRecordingSpan) AddLink(trace.Link) {}
+
+// SetName does nothing.
+func (nonRecordingSpan) SetName(string) {}
+
+// TracerProvider returns the trace.TracerProvider that provided the Tracer
+// that created this span.
+func (s nonRecordingSpan) TracerProvider() trace.TracerProvider { return s.tracer.provider }
+
+func isRecording(s SamplingResult) bool {
+ return s.Decision == RecordOnly || s.Decision == RecordAndSample
+}
+
+func isSampled(s SamplingResult) bool {
+ return s.Decision == RecordAndSample
+}
+
+// Status is the classified state of a Span.
+type Status struct {
+ // Code is an identifier of a Spans state classification.
+ Code codes.Code
+ // Description is a user hint about why that status was set. It is only
+ // applicable when Code is Error.
+ Description string
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span_exporter.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span_exporter.go
new file mode 100644
index 0000000..6bdda3d
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span_exporter.go
@@ -0,0 +1,36 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import "context"
+
+// SpanExporter handles the delivery of spans to external receivers. This is
+// the final component in the trace export pipeline.
+type SpanExporter interface {
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // ExportSpans exports a batch of spans.
+ //
+ // This function is called synchronously, so there is no concurrency
+ // safety requirement. However, due to the synchronous calling pattern,
+ // it is critical that all timeouts and cancellations contained in the
+ // passed context must be honored.
+ //
+ // Any retry logic must be contained in this function. The SDK that
+ // calls this function will not implement any retry logic. All errors
+ // returned by this function are considered unrecoverable and will be
+ // reported to a configured error Handler.
+ ExportSpans(ctx context.Context, spans []ReadOnlySpan) error
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // Shutdown notifies the exporter of a pending halt to operations. The
+ // exporter is expected to perform any cleanup or synchronization it
+ // requires while honoring all timeouts and cancellations contained in
+ // the passed context.
+ Shutdown(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.
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span_limits.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span_limits.go
new file mode 100644
index 0000000..bec5e20
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span_limits.go
@@ -0,0 +1,114 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import "go.opentelemetry.io/otel/sdk/internal/env"
+
+const (
+ // DefaultAttributeValueLengthLimit is the default maximum allowed
+ // attribute value length, unlimited.
+ DefaultAttributeValueLengthLimit = -1
+
+ // DefaultAttributeCountLimit is the default maximum number of attributes
+ // a span can have.
+ DefaultAttributeCountLimit = 128
+
+ // DefaultEventCountLimit is the default maximum number of events a span
+ // can have.
+ DefaultEventCountLimit = 128
+
+ // DefaultLinkCountLimit is the default maximum number of links a span can
+ // have.
+ DefaultLinkCountLimit = 128
+
+ // DefaultAttributePerEventCountLimit is the default maximum number of
+ // attributes a span event can have.
+ DefaultAttributePerEventCountLimit = 128
+
+ // DefaultAttributePerLinkCountLimit is the default maximum number of
+ // attributes a span link can have.
+ DefaultAttributePerLinkCountLimit = 128
+)
+
+// SpanLimits represents the limits of a span.
+type SpanLimits struct {
+ // AttributeValueLengthLimit is the maximum allowed attribute value length.
+ //
+ // This limit only applies to string and string slice attribute values.
+ // Any string longer than this value will be truncated to this length.
+ //
+ // Setting this to a negative value means no limit is applied.
+ AttributeValueLengthLimit int
+
+ // AttributeCountLimit is the maximum allowed span attribute count. Any
+ // attribute added to a span once this limit is reached will be dropped.
+ //
+ // Setting this to zero means no attributes will be recorded.
+ //
+ // Setting this to a negative value means no limit is applied.
+ AttributeCountLimit int
+
+ // EventCountLimit is the maximum allowed span event count. Any event
+ // added to a span once this limit is reached means it will be added but
+ // the oldest event will be dropped.
+ //
+ // Setting this to zero means no events we be recorded.
+ //
+ // Setting this to a negative value means no limit is applied.
+ EventCountLimit int
+
+ // LinkCountLimit is the maximum allowed span link count. Any link added
+ // to a span once this limit is reached means it will be added but the
+ // oldest link will be dropped.
+ //
+ // Setting this to zero means no links we be recorded.
+ //
+ // Setting this to a negative value means no limit is applied.
+ LinkCountLimit int
+
+ // AttributePerEventCountLimit is the maximum number of attributes allowed
+ // per span event. Any attribute added after this limit reached will be
+ // dropped.
+ //
+ // Setting this to zero means no attributes will be recorded for events.
+ //
+ // Setting this to a negative value means no limit is applied.
+ AttributePerEventCountLimit int
+
+ // AttributePerLinkCountLimit is the maximum number of attributes allowed
+ // per span link. Any attribute added after this limit reached will be
+ // dropped.
+ //
+ // Setting this to zero means no attributes will be recorded for links.
+ //
+ // Setting this to a negative value means no limit is applied.
+ AttributePerLinkCountLimit int
+}
+
+// NewSpanLimits returns a SpanLimits with all limits set to the value their
+// corresponding environment variable holds, or the default if unset.
+//
+// • AttributeValueLengthLimit: OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT
+// (default: unlimited)
+//
+// • AttributeCountLimit: OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT (default: 128)
+//
+// • EventCountLimit: OTEL_SPAN_EVENT_COUNT_LIMIT (default: 128)
+//
+// • AttributePerEventCountLimit: OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT (default:
+// 128)
+//
+// • LinkCountLimit: OTEL_SPAN_LINK_COUNT_LIMIT (default: 128)
+//
+// • AttributePerLinkCountLimit: OTEL_LINK_ATTRIBUTE_COUNT_LIMIT (default: 128)
+func NewSpanLimits() SpanLimits {
+ return SpanLimits{
+ AttributeValueLengthLimit: env.SpanAttributeValueLength(DefaultAttributeValueLengthLimit),
+ AttributeCountLimit: env.SpanAttributeCount(DefaultAttributeCountLimit),
+ EventCountLimit: env.SpanEventCount(DefaultEventCountLimit),
+ LinkCountLimit: env.SpanLinkCount(DefaultLinkCountLimit),
+ AttributePerEventCountLimit: env.SpanEventAttributeCount(DefaultAttributePerEventCountLimit),
+ AttributePerLinkCountLimit: env.SpanLinkAttributeCount(DefaultAttributePerLinkCountLimit),
+ }
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/span_processor.go b/vendor/go.opentelemetry.io/otel/sdk/trace/span_processor.go
new file mode 100644
index 0000000..af7f917
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/span_processor.go
@@ -0,0 +1,61 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "sync"
+)
+
+// SpanProcessor is a processing pipeline for spans in the trace signal.
+// SpanProcessors registered with a TracerProvider and are called at the start
+// and end of a Span's lifecycle, and are called in the order they are
+// registered.
+type SpanProcessor interface {
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // OnStart is called when a span is started. It is called synchronously
+ // and should not block.
+ OnStart(parent context.Context, s ReadWriteSpan)
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // OnEnd is called when span is finished. It is called synchronously and
+ // hence not block.
+ OnEnd(s ReadOnlySpan)
+ // DO NOT CHANGE: any modification will not be backwards compatible and
+ // must never be done outside of a new major release.
+
+ // Shutdown is called when the SDK shuts down. Any cleanup or release of
+ // resources held by the processor should be done in this call.
+ //
+ // Calls to OnStart, OnEnd, or ForceFlush after this has been called
+ // should be ignored.
+ //
+ // All timeouts and cancellations contained in ctx must be honored, this
+ // should not block indefinitely.
+ Shutdown(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.
+
+ // ForceFlush exports all ended spans to the configured Exporter that have not yet
+ // been exported. It should only be called when absolutely necessary, such as when
+ // using a FaaS provider that may suspend the process after an invocation, but before
+ // the Processor can export the completed spans.
+ ForceFlush(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.
+}
+
+type spanProcessorState struct {
+ sp SpanProcessor
+ state sync.Once
+}
+
+func newSpanProcessorState(sp SpanProcessor) *spanProcessorState {
+ return &spanProcessorState{sp: sp}
+}
+
+type spanProcessorStates []*spanProcessorState
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go b/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go
new file mode 100644
index 0000000..0b65ae9
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go
@@ -0,0 +1,162 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+import (
+ "context"
+ "time"
+
+ "go.opentelemetry.io/otel/sdk/instrumentation"
+ "go.opentelemetry.io/otel/trace"
+ "go.opentelemetry.io/otel/trace/embedded"
+)
+
+type tracer struct {
+ embedded.Tracer
+
+ provider *TracerProvider
+ instrumentationScope instrumentation.Scope
+}
+
+var _ trace.Tracer = &tracer{}
+
+// Start starts a Span and returns it along with a context containing it.
+//
+// The Span is created with the provided name and as a child of any existing
+// span context found in the passed context. The created Span will be
+// configured appropriately by any SpanOption passed.
+func (tr *tracer) Start(
+ ctx context.Context,
+ name string,
+ options ...trace.SpanStartOption,
+) (context.Context, trace.Span) {
+ config := trace.NewSpanStartConfig(options...)
+
+ if ctx == nil {
+ // Prevent trace.ContextWithSpan from panicking.
+ ctx = context.Background()
+ }
+
+ // For local spans created by this SDK, track child span count.
+ if p := trace.SpanFromContext(ctx); p != nil {
+ if sdkSpan, ok := p.(*recordingSpan); ok {
+ sdkSpan.addChild()
+ }
+ }
+
+ s := tr.newSpan(ctx, name, &config)
+ if rw, ok := s.(ReadWriteSpan); ok && s.IsRecording() {
+ sps := tr.provider.getSpanProcessors()
+ for _, sp := range sps {
+ sp.sp.OnStart(ctx, rw)
+ }
+ }
+ if rtt, ok := s.(runtimeTracer); ok {
+ ctx = rtt.runtimeTrace(ctx)
+ }
+
+ return trace.ContextWithSpan(ctx, s), s
+}
+
+type runtimeTracer interface {
+ // runtimeTrace starts a "runtime/trace".Task for the span and
+ // returns a context containing the task.
+ runtimeTrace(ctx context.Context) context.Context
+}
+
+// newSpan returns a new configured span.
+func (tr *tracer) newSpan(ctx context.Context, name string, config *trace.SpanConfig) trace.Span {
+ // If told explicitly to make this a new root use a zero value SpanContext
+ // as a parent which contains an invalid trace ID and is not remote.
+ var psc trace.SpanContext
+ if config.NewRoot() {
+ ctx = trace.ContextWithSpanContext(ctx, psc)
+ } else {
+ psc = trace.SpanContextFromContext(ctx)
+ }
+
+ // If there is a valid parent trace ID, use it to ensure the continuity of
+ // the trace. Always generate a new span ID so other components can rely
+ // on a unique span ID, even if the Span is non-recording.
+ var tid trace.TraceID
+ var sid trace.SpanID
+ if !psc.TraceID().IsValid() {
+ tid, sid = tr.provider.idGenerator.NewIDs(ctx)
+ } else {
+ tid = psc.TraceID()
+ sid = tr.provider.idGenerator.NewSpanID(ctx, tid)
+ }
+
+ samplingResult := tr.provider.sampler.ShouldSample(SamplingParameters{
+ ParentContext: ctx,
+ TraceID: tid,
+ Name: name,
+ Kind: config.SpanKind(),
+ Attributes: config.Attributes(),
+ Links: config.Links(),
+ })
+
+ scc := trace.SpanContextConfig{
+ TraceID: tid,
+ SpanID: sid,
+ TraceState: samplingResult.Tracestate,
+ }
+ if isSampled(samplingResult) {
+ scc.TraceFlags = psc.TraceFlags() | trace.FlagsSampled
+ } else {
+ scc.TraceFlags = psc.TraceFlags() &^ trace.FlagsSampled
+ }
+ sc := trace.NewSpanContext(scc)
+
+ if !isRecording(samplingResult) {
+ return tr.newNonRecordingSpan(sc)
+ }
+ return tr.newRecordingSpan(psc, sc, name, samplingResult, config)
+}
+
+// newRecordingSpan returns a new configured recordingSpan.
+func (tr *tracer) newRecordingSpan(
+ psc, sc trace.SpanContext,
+ name string,
+ sr SamplingResult,
+ config *trace.SpanConfig,
+) *recordingSpan {
+ startTime := config.Timestamp()
+ if startTime.IsZero() {
+ startTime = time.Now()
+ }
+
+ s := &recordingSpan{
+ // Do not pre-allocate the attributes slice here! Doing so will
+ // allocate memory that is likely never going to be used, or if used,
+ // will be over-sized. The default Go compiler has been tested to
+ // dynamically allocate needed space very well. Benchmarking has shown
+ // it to be more performant than what we can predetermine here,
+ // especially for the common use case of few to no added
+ // attributes.
+
+ parent: psc,
+ spanContext: sc,
+ spanKind: trace.ValidateSpanKind(config.SpanKind()),
+ name: name,
+ startTime: startTime,
+ events: newEvictedQueueEvent(tr.provider.spanLimits.EventCountLimit),
+ links: newEvictedQueueLink(tr.provider.spanLimits.LinkCountLimit),
+ tracer: tr,
+ }
+
+ for _, l := range config.Links() {
+ s.AddLink(l)
+ }
+
+ s.SetAttributes(sr.Attributes...)
+ s.SetAttributes(config.Attributes()...)
+
+ return s
+}
+
+// newNonRecordingSpan returns a new configured nonRecordingSpan.
+func (tr *tracer) newNonRecordingSpan(sc trace.SpanContext) nonRecordingSpan {
+ return nonRecordingSpan{tracer: tr, sc: sc}
+}
diff --git a/vendor/go.opentelemetry.io/otel/sdk/trace/version.go b/vendor/go.opentelemetry.io/otel/sdk/trace/version.go
new file mode 100644
index 0000000..b84dd2c
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/sdk/trace/version.go
@@ -0,0 +1,9 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package trace // import "go.opentelemetry.io/otel/sdk/trace"
+
+// version is the current release version of the metric SDK in use.
+func version() string {
+ return "1.16.0-rc.1"
+}