mirror of
https://github.com/k3s-io/kubernetes.git
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99 lines
2.2 KiB
Go
99 lines
2.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package registry
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import (
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"net/http"
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"golang.org/x/net/context"
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"k8s.io/kubernetes/pkg/api/rest"
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metav1 "k8s.io/kubernetes/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/watch"
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)
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type decoratedWatcher struct {
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w watch.Interface
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decorator rest.ObjectFunc
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cancel context.CancelFunc
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resultCh chan watch.Event
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}
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func newDecoratedWatcher(w watch.Interface, decorator rest.ObjectFunc) *decoratedWatcher {
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ctx, cancel := context.WithCancel(context.Background())
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d := &decoratedWatcher{
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w: w,
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decorator: decorator,
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cancel: cancel,
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resultCh: make(chan watch.Event),
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}
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go d.run(ctx)
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return d
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}
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func (d *decoratedWatcher) run(ctx context.Context) {
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var recv, send watch.Event
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for {
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select {
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case recv = <-d.w.ResultChan():
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switch recv.Type {
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case watch.Added, watch.Modified, watch.Deleted:
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err := d.decorator(recv.Object)
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if err != nil {
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send = makeStatusErrorEvent(err)
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break
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}
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send = recv
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case watch.Error:
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send = recv
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}
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select {
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case d.resultCh <- send:
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if send.Type == watch.Error {
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d.cancel()
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}
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case <-ctx.Done():
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}
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case <-ctx.Done():
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d.w.Stop()
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close(d.resultCh)
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return
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}
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}
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}
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func (d *decoratedWatcher) Stop() {
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d.cancel()
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}
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func (d *decoratedWatcher) ResultChan() <-chan watch.Event {
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return d.resultCh
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}
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func makeStatusErrorEvent(err error) watch.Event {
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status := &metav1.Status{
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Status: metav1.StatusFailure,
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Message: err.Error(),
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Code: http.StatusInternalServerError,
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Reason: metav1.StatusReasonInternalError,
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}
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return watch.Event{
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Type: watch.Error,
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Object: status,
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}
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}
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