[VOL-5486] Fix deprecated versions
Change-Id: If0b888d6c2f33b2f415c8b03b08dc994bb3df3f4
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
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(),
+ )
+}