micro/server/context.go

55 lines
1.3 KiB
Go
Raw Normal View History

2016-01-28 21:23:24 +03:00
package server
import (
2018-03-03 14:53:52 +03:00
"context"
2016-01-28 21:23:24 +03:00
)
type serverKey struct{}
// FromContext returns Server from context
2016-01-28 21:23:24 +03:00
func FromContext(ctx context.Context) (Server, bool) {
if ctx == nil {
return nil, false
}
2016-01-28 21:23:24 +03:00
c, ok := ctx.Value(serverKey{}).(Server)
return c, ok
}
// NewContext stores Server to context
2016-01-28 21:23:24 +03:00
func NewContext(ctx context.Context, s Server) context.Context {
if ctx == nil {
ctx = context.Background()
}
2016-01-28 21:23:24 +03:00
return context.WithValue(ctx, serverKey{}, s)
}
// 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)
}
}
// SetSubscriberOption returns a function to setup a context with given value
func SetSubscriberOption(k, v interface{}) SubscriberOption {
return func(o *SubscriberOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, k, v)
}
}
// SetHandlerOption returns a function to setup a context with given value
func SetHandlerOption(k, v interface{}) HandlerOption {
return func(o *HandlerOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, k, v)
}
}