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59 lines
1.0 KiB
Go
59 lines
1.0 KiB
Go
package resolver
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import (
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"zero/core/discov"
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"google.golang.org/grpc/resolver"
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)
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const discovScheme = "discov"
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type discovBuilder struct {
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etcd discov.EtcdConf
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}
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func (b *discovBuilder) Scheme() string {
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return discovScheme
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}
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func (b *discovBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (
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resolver.Resolver, error) {
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sub, err := discov.NewSubscriber(b.etcd.Hosts, b.etcd.Key)
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if err != nil {
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return nil, err
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}
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sub.AddListener(func() {
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vals := sub.Values()
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var addrs []resolver.Address
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for _, val := range vals {
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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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return &discovResolver{
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cc: cc,
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}, nil
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}
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type discovResolver struct {
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cc resolver.ClientConn
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}
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func (r *discovResolver) Close() {
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}
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func (r *discovResolver) ResolveNow(options resolver.ResolveNowOptions) {
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}
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func RegisterResolver(etcd discov.EtcdConf) {
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resolver.Register(&discovBuilder{
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etcd: etcd,
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})
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}
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