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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2025 Datadog, Inc.
package tracer
import (
"golang.org/x/exp/constraints"
"github.com/DataDog/dd-trace-go/v2/internal/log"
)
//go:generate go run github.com/tinylib/msgp -unexported -marshal=false -o=span_event_msgp.go -tests=false
// SpanEvent represent an event at an instant in time related to this span, but not necessarily during the span.
type spanEvent struct {
// Name is the name of event.
Name string `msg:"name" json:"name"`
// TimeUnixNano is the number of nanoseconds between the Unix epoch and this event.
TimeUnixNano uint64 `msg:"time_unix_nano" json:"time_unix_nano"`
// Attributes is a map of string to attribute.
Attributes map[string]*spanEventAttribute `msg:"attributes" json:"-"`
// RawAttributes is used when native span event serialization is not supported by the agent.
RawAttributes map[string]any `msg:"-" json:"attributes,omitempty"`
}
type spanEventAttribute struct {
Type spanEventAttributeType `msg:"type" json:"type"`
StringValue string `msg:"string_value,omitempty"`
BoolValue bool `msg:"bool_value,omitempty" `
IntValue int64 `msg:"int_value,omitempty" `
DoubleValue float64 `msg:"double_value,omitempty"`
ArrayValue *spanEventArrayAttribute `msg:"array_value,omitempty"`
}
type spanEventAttributeType int32
const (
spanEventAttributeTypeString spanEventAttributeType = 0
spanEventAttributeTypeBool spanEventAttributeType = 1
spanEventAttributeTypeInt spanEventAttributeType = 2
spanEventAttributeTypeDouble spanEventAttributeType = 3
spanEventAttributeTypeArray spanEventAttributeType = 4
)
type spanEventArrayAttribute struct {
Values []*spanEventArrayAttributeValue `msg:"values" json:"values"`
}
type spanEventArrayAttributeValue struct {
Type spanEventArrayAttributeValueType `msg:"type"`
StringValue string `msg:"string_value,omitempty"`
BoolValue bool `msg:"bool_value,omitempty"`
IntValue int64 `msg:"int_value,omitempty"`
DoubleValue float64 `msg:"double_value,omitempty"`
}
type spanEventArrayAttributeValueType int32
const (
spanEventArrayAttributeValueTypeString spanEventArrayAttributeValueType = 0
spanEventArrayAttributeValueTypeBool spanEventArrayAttributeValueType = 1
spanEventArrayAttributeValueTypeInt spanEventArrayAttributeValueType = 2
spanEventArrayAttributeValueTypeDouble spanEventArrayAttributeValueType = 3
)
func toSpanEventAttributeMsg(attrs map[string]any) map[string]*spanEventAttribute {
if attrs == nil {
return nil
}
res := make(map[string]*spanEventAttribute, len(attrs))
for key, val := range attrs {
if msgVal := toSpanEventAttributeValueMsg(val); msgVal != nil {
res[key] = msgVal
} else {
log.Warn("dropped unsupported span event attribute %s (unsupported type: %T)", key, val)
}
}
return res
}
func toSpanEventAttributeValueMsg(v any) *spanEventAttribute {
switch v := v.(type) {
// string
case string:
return &spanEventAttribute{
Type: spanEventAttributeTypeString,
StringValue: v,
}
// bool
case bool:
return &spanEventAttribute{
Type: spanEventAttributeTypeBool,
BoolValue: v,
}
// int types
case int:
return intValue(v)
case uint:
return intValue(v)
case int64:
return intValue(v)
case uint64:
return intValue(v)
case uint8:
return intValue(v)
case uint16:
return intValue(v)
case uint32:
return intValue(v)
case uintptr:
return intValue(v)
case int8:
return intValue(v)
case int16:
return intValue(v)
case int32:
return intValue(v)
// float types
case float64:
return floatValue(v)
case float32:
return floatValue(v)
// string slice
case []string:
return stringSliceValue(v)
// bool slice
case []bool:
return boolSliceValue(v)
// int slice
case []int:
return intSliceValue(v)
case []uint:
return intSliceValue(v)
case []int64:
return intSliceValue(v)
case []uint64:
return intSliceValue(v)
case []uint8:
return intSliceValue(v)
case []uint16:
return intSliceValue(v)
case []uint32:
return intSliceValue(v)
case []uintptr:
return intSliceValue(v)
case []int8:
return intSliceValue(v)
case []int16:
return intSliceValue(v)
case []int32:
return intSliceValue(v)
// float slice
case []float64:
return floatSliceValue(v)
case []float32:
return floatSliceValue(v)
case arrayValue:
return arrayValueToSpanEventAttribute(v)
default:
return nil
}
}
// arrayValueToSpanEventAttribute converts a decoded arrayValue (from payload v1) to a spanEventAttribute.
func arrayValueToSpanEventAttribute(arr arrayValue) *spanEventAttribute {
if arr == nil {
return nil
}
values := make([]*spanEventArrayAttributeValue, 0, len(arr))
for _, av := range arr {
if val := anyValueToSpanEventArrayAttributeValue(av); val != nil {
values = append(values, val)
}
}
return &spanEventAttribute{
Type: spanEventAttributeTypeArray,
ArrayValue: &spanEventArrayAttribute{
Values: values,
},
}
}
func anyValueToSpanEventArrayAttributeValue(av anyValue) *spanEventArrayAttributeValue {
switch av.valueType {
case StringValueType:
return &spanEventArrayAttributeValue{Type: spanEventArrayAttributeValueTypeString, StringValue: av.value.(string)}
case BoolValueType:
return &spanEventArrayAttributeValue{Type: spanEventArrayAttributeValueTypeBool, BoolValue: av.value.(bool)}
case IntValueType:
return &spanEventArrayAttributeValue{Type: spanEventArrayAttributeValueTypeInt, IntValue: av.value.(int64)}
case FloatValueType:
return &spanEventArrayAttributeValue{Type: spanEventArrayAttributeValueTypeDouble, DoubleValue: av.value.(float64)}
default:
return nil
}
}
func intValue[T constraints.Integer](v T) *spanEventAttribute {
return &spanEventAttribute{
Type: spanEventAttributeTypeInt,
IntValue: int64(v),
}
}
func floatValue[T constraints.Float](v T) *spanEventAttribute {
return &spanEventAttribute{
Type: spanEventAttributeTypeDouble,
DoubleValue: float64(v),
}
}
func stringSliceValue(values []string) *spanEventAttribute {
arrayVal := make([]*spanEventArrayAttributeValue, 0, len(values))
for _, v := range values {
arrayVal = append(arrayVal, &spanEventArrayAttributeValue{
Type: spanEventArrayAttributeValueTypeString,
StringValue: v,
})
}
return &spanEventAttribute{
Type: spanEventAttributeTypeArray,
ArrayValue: &spanEventArrayAttribute{
Values: arrayVal,
},
}
}
func boolSliceValue(values []bool) *spanEventAttribute {
arrayVal := make([]*spanEventArrayAttributeValue, 0, len(values))
for _, v := range values {
arrayVal = append(arrayVal, &spanEventArrayAttributeValue{
Type: spanEventArrayAttributeValueTypeBool,
BoolValue: v,
})
}
return &spanEventAttribute{
Type: spanEventAttributeTypeArray,
ArrayValue: &spanEventArrayAttribute{
Values: arrayVal,
},
}
}
func intSliceValue[T constraints.Integer](values []T) *spanEventAttribute {
arrayVal := make([]*spanEventArrayAttributeValue, 0, len(values))
for _, v := range values {
arrayVal = append(arrayVal, &spanEventArrayAttributeValue{
Type: spanEventArrayAttributeValueTypeInt,
IntValue: int64(v),
})
}
return &spanEventAttribute{
Type: spanEventAttributeTypeArray,
ArrayValue: &spanEventArrayAttribute{
Values: arrayVal,
},
}
}
func floatSliceValue[T constraints.Float](values []T) *spanEventAttribute {
arrayVal := make([]*spanEventArrayAttributeValue, 0, len(values))
for _, v := range values {
arrayVal = append(arrayVal, &spanEventArrayAttributeValue{
Type: spanEventArrayAttributeValueTypeDouble,
DoubleValue: float64(v),
})
}
return &spanEventAttribute{
Type: spanEventAttributeTypeArray,
ArrayValue: &spanEventArrayAttribute{
Values: arrayVal,
},
}
}