micro/server/context.go

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package server
import (
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"context"
"sync"
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)
type serverKey struct{}
func wait(ctx context.Context) *sync.WaitGroup {
if ctx == nil {
return nil
}
wg, ok := ctx.Value("wait").(*sync.WaitGroup)
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if !ok {
return nil
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}
return wg
}
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func FromContext(ctx context.Context) (Server, bool) {
c, ok := ctx.Value(serverKey{}).(Server)
return c, ok
}
func NewContext(ctx context.Context, s Server) context.Context {
return context.WithValue(ctx, serverKey{}, s)
}