micro/context.go
Vasiliy Tolstov 827d467077 micro: rewrite options to support multiple building blocks
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2021-01-29 13:17:32 +03:00

23 lines
507 B
Go

package micro
import "context"
type serviceKey struct{}
// FromContext retrieves a Service from the Context.
func FromContext(ctx context.Context) (Service, bool) {
if ctx == nil {
return nil, false
}
s, ok := ctx.Value(serviceKey{}).(Service)
return s, ok
}
// NewContext returns a new Context with the Service embedded within it.
func NewContext(ctx context.Context, s Service) context.Context {
if ctx == nil {
ctx = context.Background()
}
return context.WithValue(ctx, serviceKey{}, s)
}