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// 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
}
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