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60 lines
1.3 KiB
60 lines
1.3 KiB
package eureka
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import (
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"context"
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"github.com/go-kratos/kratos/v2/registry"
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)
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var _ registry.Watcher = (*watcher)(nil)
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type watcher struct {
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ctx context.Context
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cancel context.CancelFunc
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cli *API
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watchChan chan struct{}
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serverName string
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}
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func newWatch(ctx context.Context, cli *API, serverName string) (*watcher, error) {
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w := &watcher{
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ctx: ctx,
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cli: cli,
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serverName: serverName,
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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(
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serverName,
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func() {
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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() (services []*registry.ServiceInstance, err 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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instances := w.cli.GetService(w.ctx, w.serverName)
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services = make([]*registry.ServiceInstance, 0, len(instances))
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for _, instance := range instances {
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services = append(services, ®istry.ServiceInstance{
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ID: instance.Metadata["ID"],
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Name: instance.Metadata["Name"],
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Version: instance.Metadata["Version"],
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Endpoints: []string{instance.Metadata["Endpoints"]},
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Metadata: instance.Metadata,
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})
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}
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return
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}
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}
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func (w *watcher) Stop() error {
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w.cancel()
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w.cli.Unsubscribe(w.serverName)
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return nil
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}
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