codec: add context helper funcs

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
Василий Толстов 2021-09-22 01:07:27 +03:00
parent 56e02ec463
commit 818a0e6356

34
codec/context.go Normal file
View File

@ -0,0 +1,34 @@
package codec
import (
"context"
)
type codecKey struct{}
// FromContext returns codec from context
func FromContext(ctx context.Context) (Codec, bool) {
if ctx == nil {
return nil, false
}
c, ok := ctx.Value(codecKey{}).(Codec)
return c, ok
}
// NewContext put codec in context
func NewContext(ctx context.Context, c Codec) context.Context {
if ctx == nil {
ctx = context.Background()
}
return context.WithValue(ctx, codecKey{}, c)
}
// SetOption returns a function to setup a context with given value
func SetOption(k, v interface{}) Option {
return func(o *Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, k, v)
}
}