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documentation: mention Register functions should be call at init time (#1975)

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This commit is contained in:
Menghan Li
2018-04-12 15:11:04 -07:00
committed by lyuxuan
parent 0c6b34bbc3
commit c4a6e7589b
2 changed files with 12 additions and 5 deletions
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8
resolver/resolver.go
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@ -29,8 +29,12 @@ var (
// TODO(bar) install dns resolver in init(){}.
// Register registers the resolver builder to the resolver map.
// b.Scheme will be used as the scheme registered with this builder.
// Register registers the resolver builder to the resolver map. b.Scheme will be
// used as the scheme registered with this builder.
//
// NOTE: this function must only be called during initialization time (i.e. in
// an init() function), and is not thread-safe. If multiple Resolvers are
// registered with the same name, the one registered last will take effect.
func Register(b Builder) {
m[b.Scheme()] = b
}