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86 lines
2.0 KiB
86 lines
2.0 KiB
package nacos |
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import ( |
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"context" |
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"fmt" |
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"github.com/go-kratos/kratos/v2/registry" |
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"github.com/nacos-group/nacos-sdk-go/clients/naming_client" |
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"github.com/nacos-group/nacos-sdk-go/model" |
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"github.com/nacos-group/nacos-sdk-go/vo" |
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) |
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var _ registry.Watcher = (*watcher)(nil) |
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type watcher struct { |
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serviceName string |
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clusters []string |
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groupName string |
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ctx context.Context |
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cancel context.CancelFunc |
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watchChan chan struct{} |
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cli naming_client.INamingClient |
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kind string |
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} |
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func newWatcher(ctx context.Context, cli naming_client.INamingClient, serviceName, groupName, kind string, clusters []string) (*watcher, error) { |
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w := &watcher{ |
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serviceName: serviceName, |
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clusters: clusters, |
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groupName: groupName, |
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cli: cli, |
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kind: kind, |
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watchChan: make(chan struct{}, 1), |
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} |
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w.ctx, w.cancel = context.WithCancel(ctx) |
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e := w.cli.Subscribe(&vo.SubscribeParam{ |
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ServiceName: serviceName, |
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Clusters: clusters, |
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GroupName: groupName, |
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SubscribeCallback: func(services []model.SubscribeService, err error) { |
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w.watchChan <- struct{}{} |
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}, |
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}) |
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return w, e |
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} |
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func (w *watcher) Next() ([]*registry.ServiceInstance, error) { |
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select { |
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case <-w.ctx.Done(): |
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return nil, w.ctx.Err() |
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case <-w.watchChan: |
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} |
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res, err := w.cli.GetService(vo.GetServiceParam{ |
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ServiceName: w.serviceName, |
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GroupName: w.groupName, |
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Clusters: w.clusters, |
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}) |
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if err != nil { |
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return nil, err |
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} |
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items := make([]*registry.ServiceInstance, 0, len(res.Hosts)) |
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for _, in := range res.Hosts { |
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kind := w.kind |
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if k, ok := in.Metadata["kind"]; ok { |
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kind = k |
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} |
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items = append(items, ®istry.ServiceInstance{ |
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ID: in.InstanceId, |
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Name: res.Name, |
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Version: in.Metadata["version"], |
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Metadata: in.Metadata, |
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Endpoints: []string{fmt.Sprintf("%s://%s:%d", kind, in.Ip, in.Port)}, |
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}) |
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} |
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return items, nil |
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} |
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func (w *watcher) Stop() error { |
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w.cancel() |
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return w.cli.Unsubscribe(&vo.SubscribeParam{ |
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ServiceName: w.serviceName, |
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GroupName: w.groupName, |
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Clusters: w.clusters, |
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}) |
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}
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