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71 lines
1.2 KiB
71 lines
1.2 KiB
package consul
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import (
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"github.com/go-kratos/kratos/v2/config"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/api/watch"
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)
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type watcher struct {
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source *source
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ch chan interface{}
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closeChan chan struct{}
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wp *watch.Plan
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}
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func (w *watcher) handle(idx uint64, data interface{}) {
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if data == nil {
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return
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}
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_, ok := data.(api.KVPairs)
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if !ok {
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return
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}
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w.ch <- struct{}{}
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}
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func newWatcher(s *source) (*watcher, error) {
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w := &watcher{
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source: s,
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ch: make(chan interface{}),
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closeChan: make(chan struct{}),
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}
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wp, err := watch.Parse(map[string]interface{}{"type": "keyprefix", "prefix": s.options.path})
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if err != nil {
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return nil, err
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}
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wp.Handler = w.handle
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w.wp = wp
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// wp.Run is a blocking call and will prevent newWatcher from returning
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go func() {
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err := wp.RunWithClientAndHclog(s.client, nil)
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if err != nil {
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panic(err)
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}
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}()
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return w, nil
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}
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func (w *watcher) Next() ([]*config.KeyValue, error) {
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select {
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case _, ok := <-w.ch:
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if !ok {
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return nil, nil
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}
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return w.source.Load()
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case <-w.closeChan:
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return nil, nil
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}
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}
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func (w *watcher) Stop() error {
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w.wp.Stop()
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close(w.closeChan)
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return nil
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}
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