mirror of
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101 lines
1.8 KiB
Go
101 lines
1.8 KiB
Go
package configmap
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import (
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"errors"
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"time"
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"github.com/micro/go-micro/v2/config/source"
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v12 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/cache"
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)
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type watcher struct {
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opts source.Options
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name string
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namespace string
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client *kubernetes.Clientset
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st cache.Store
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ct cache.Controller
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ch chan *source.ChangeSet
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exit chan bool
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stop chan struct{}
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}
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func newWatcher(n, ns string, c *kubernetes.Clientset, opts source.Options) (source.Watcher, error) {
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w := &watcher{
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opts: opts,
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name: n,
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namespace: ns,
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client: c,
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ch: make(chan *source.ChangeSet),
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exit: make(chan bool),
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stop: make(chan struct{}),
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}
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lw := cache.NewListWatchFromClient(w.client.CoreV1().RESTClient(), "configmaps", w.namespace, fields.OneTermEqualSelector("metadata.name", w.name))
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st, ct := cache.NewInformer(
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lw,
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&v12.ConfigMap{},
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time.Second*30,
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cache.ResourceEventHandlerFuncs{
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UpdateFunc: w.handle,
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},
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)
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go ct.Run(w.stop)
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w.ct = ct
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w.st = st
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return w, nil
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}
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func (w *watcher) handle(oldCmp interface{}, newCmp interface{}) {
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if newCmp == nil {
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return
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}
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data := makeMap(newCmp.(*v12.ConfigMap).Data)
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b, err := w.opts.Encoder.Encode(data)
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if err != nil {
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return
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}
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cs := &source.ChangeSet{
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Format: w.opts.Encoder.String(),
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Source: w.name,
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Data: b,
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Timestamp: newCmp.(*v12.ConfigMap).CreationTimestamp.Time,
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}
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cs.Checksum = cs.Sum()
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w.ch <- cs
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}
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// Next
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func (w *watcher) Next() (*source.ChangeSet, error) {
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select {
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case cs := <-w.ch:
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return cs, nil
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case <-w.exit:
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return nil, errors.New("watcher stopped")
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}
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}
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// Stop
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func (w *watcher) Stop() error {
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select {
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case <-w.exit:
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return nil
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case <-w.stop:
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return nil
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default:
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close(w.exit)
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}
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return nil
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}
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