micro/client/context.go

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package client
import (
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"context"
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)
type clientKey struct{}
// FromContext get client from context
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func FromContext(ctx context.Context) (Client, bool) {
if ctx == nil {
return nil, false
}
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c, ok := ctx.Value(clientKey{}).(Client)
return c, ok
}
// NewContext put client in context
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func NewContext(ctx context.Context, c Client) context.Context {
if ctx == nil {
ctx = context.Background()
}
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return context.WithValue(ctx, clientKey{}, c)
}
// SetPublishOption returns a function to setup a context with given value
func SetPublishOption(k, v interface{}) PublishOption {
return func(o *PublishOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, k, v)
}
}