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trace_baggage.go
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/
trace_baggage.go
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package tracer
import (
"context"
"github.com/chain5j/chain5j-pkg/util/convutil"
"go.opentelemetry.io/otel/baggage"
)
// Baggage holds the data through all tracing spans.
type Baggage struct {
ctx context.Context
}
// NewBaggage creates and returns a new Baggage object from given tracing context.
func NewBaggage(ctx context.Context) *Baggage {
if ctx == nil {
ctx = context.Background()
}
return &Baggage{
ctx: ctx,
}
}
// Ctx returns the context that Baggage holds.
func (b *Baggage) Ctx() context.Context {
return b.ctx
}
// SetValue is a convenient function for adding one key-value pair to baggage.
// Note that it uses attribute.Any to set the key-value pair.
func (b *Baggage) SetValue(key string, value interface{}) context.Context {
member, _ := baggage.NewMember(key, convutil.ToString(value))
bag, _ := baggage.New(member)
b.ctx = baggage.ContextWithBaggage(b.ctx, bag)
return b.ctx
}
// SetMap is a convenient function for adding map key-value pairs to baggage.
// Note that it uses attribute.Any to set the key-value pair.
func (b *Baggage) SetMap(data map[string]interface{}) context.Context {
members := make([]baggage.Member, 0)
for k, v := range data {
member, _ := baggage.NewMember(k, convutil.ToString(v))
members = append(members, member)
}
bag, _ := baggage.New(members...)
b.ctx = baggage.ContextWithBaggage(b.ctx, bag)
return b.ctx
}
// GetMap retrieves and returns the baggage values as map.
func (b *Baggage) GetMap() []baggage.Member {
return baggage.FromContext(b.ctx).Members()
}
// GetVar retrieves value and returns a string for specified key from baggage.
func (b *Baggage) GetVar(key string) string {
return baggage.FromContext(b.ctx).Member(key).Value()
}