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42 lines
860 B
Go
42 lines
860 B
Go
package resolver
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import (
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"strings"
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"github.com/tal-tech/go-zero/core/discov"
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"google.golang.org/grpc/resolver"
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)
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type discovBuilder struct{}
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func (d *discovBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (
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resolver.Resolver, error) {
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hosts := strings.FieldsFunc(target.Authority, func(r rune) bool {
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return r == EndpointSepChar
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})
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sub, err := discov.NewSubscriber(hosts, target.Endpoint)
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if err != nil {
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return nil, err
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}
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update := func() {
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var addrs []resolver.Address
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for _, val := range subset(sub.Values(), subsetSize) {
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addrs = append(addrs, resolver.Address{
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Addr: val,
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})
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}
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cc.UpdateState(resolver.State{
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Addresses: addrs,
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})
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}
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sub.AddListener(update)
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update()
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return &nopResolver{cc: cc}, nil
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}
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func (d *discovBuilder) Scheme() string {
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return DiscovScheme
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}
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