func (s *CustomColumnsPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
w := tabwriter.NewWriter(out, columnwidth, tabwidth, padding, padding_character, flags)
headers := make([]string, len(s.Columns))
for ix := range s.Columns {
headers[ix] = s.Columns[ix].Header
}
fmt.Fprintln(w, strings.Join(headers, "\t"))
parsers := make([]*jsonpath.JSONPath, len(s.Columns))
for ix := range s.Columns {
parsers[ix] = jsonpath.New(fmt.Sprintf("column%d", ix))
if err := parsers[ix].Parse(s.Columns[ix].FieldSpec); err != nil {
return err
}
}
if meta.IsListType(obj) {
objs, err := meta.ExtractList(obj)
if err != nil {
return err
}
for ix := range objs {
if err := s.printOneObject(objs[ix], parsers, w); err != nil {
return err
}
}
} else {
if err := s.printOneObject(obj, parsers, w); err != nil {
return err
}
}
return w.Flush()
}
// setListSelfLink sets the self link of a list to the base URL, then sets the self links
// on all child objects returned. Returns the number of items in the list.
func setListSelfLink(obj runtime.Object, req *restful.Request, namer ScopeNamer) (int, error) {
if !meta.IsListType(obj) {
return 0, nil
}
// TODO: List SelfLink generation should return a full URL?
path, query, err := namer.GenerateListLink(req)
if err != nil {
return 0, err
}
newURL := *req.Request.URL
newURL.Path = path
newURL.RawQuery = query
// use the path that got us here
newURL.Fragment = ""
if err := namer.SetSelfLink(obj, newURL.String()); err != nil {
glog.V(4).Infof("Unable to set self link on object: %v", err)
}
// Set self-link of objects in the list.
items, err := meta.ExtractList(obj)
if err != nil {
return 0, err
}
for i := range items {
if err := setSelfLink(items[i], req, namer); err != nil {
return len(items), err
}
}
return len(items), meta.SetList(obj, items)
}
func (s *SortingPrinter) sortObj(obj runtime.Object) error {
objs, err := meta.ExtractList(obj)
if err != nil {
return err
}
if len(objs) == 0 {
return nil
}
sorter, err := SortObjects(s.Decoder, objs, s.SortField)
if err != nil {
return err
}
switch list := obj.(type) {
case *v1.List:
outputList := make([]runtime.RawExtension, len(objs))
for ix := range objs {
outputList[ix] = list.Items[sorter.OriginalPosition(ix)]
}
list.Items = outputList
return nil
}
return meta.SetList(obj, objs)
}
// UsageStats calculates latest observed usage stats for all objects
func (g *GenericEvaluator) UsageStats(options quota.UsageStatsOptions) (quota.UsageStats, error) {
// default each tracked resource to zero
result := quota.UsageStats{Used: api.ResourceList{}}
for _, resourceName := range g.MatchedResourceNames {
result.Used[resourceName] = resource.MustParse("0")
}
list, err := g.ListFuncByNamespace(options.Namespace, api.ListOptions{})
if err != nil {
return result, fmt.Errorf("%s: Failed to list %v: %v", g.Name, g.GroupKind(), err)
}
_, err = meta.Accessor(list)
if err != nil {
return result, fmt.Errorf("%s: Unable to understand list result %#v", g.Name, list)
}
items, err := meta.ExtractList(list)
if err != nil {
return result, fmt.Errorf("%s: Unable to understand list result %#v (%v)", g.Name, list, err)
}
for _, item := range items {
// need to verify that the item matches the set of scopes
matchesScopes := true
for _, scope := range options.Scopes {
if !g.MatchesScope(scope, item) {
matchesScopes = false
}
}
// only count usage if there was a match
if matchesScopes {
result.Used = quota.Add(result.Used, g.Usage(item))
}
}
return result, nil
}
func TestGetMultipleTypeObjectsAsList(t *testing.T) {
pods, svc, _ := testData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &fake.RESTClient{
Codec: codec,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
switch req.URL.Path {
case "/namespaces/test/pods":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, pods)}, nil
case "/namespaces/test/services":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, svc)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
tf.ClientConfig = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Default.GroupVersion()}}
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("output", "json")
cmd.Run(cmd, []string{"pods,services"})
if tf.Printer.(*testPrinter).Objects != nil {
t.Errorf("unexpected print to default printer")
}
out, err := runtime.Decode(codec, buf.Bytes())
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
list, err := meta.ExtractList(out)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if errs := runtime.DecodeList(list, codec); len(errs) > 0 {
t.Fatalf("unexpected error: %v", errs)
}
if err := meta.SetList(out, list); err != nil {
t.Fatalf("unexpected error: %v", err)
}
expected := &api.List{
Items: []runtime.Object{
&pods.Items[0],
&pods.Items[1],
&svc.Items[0],
},
}
if !reflect.DeepEqual(expected, out) {
t.Errorf("unexpected output: %#v", out)
}
}
// CreateList will properly create a list using the storage interface
func CreateList(prefix string, helper storage.Interface, list runtime.Object) error {
items, err := meta.ExtractList(list)
if err != nil {
return err
}
err = CreateObjList(prefix, helper, items)
if err != nil {
return err
}
return meta.SetList(list, items)
}
func extractResourceList(objs []runtime.Object) ([]runtime.Object, error) {
finalObjs := []runtime.Object{}
for _, obj := range objs {
items, err := meta.ExtractList(obj)
if err != nil {
return nil, err
}
for _, item := range items {
finalObjs = append(finalObjs, item)
}
}
return finalObjs, nil
}
// ListAndWatch first lists all items and get the resource version at the moment of call,
// and then use the resource version to watch.
// It returns error if ListAndWatch didn't even try to initialize watch.
func (r *Reflector) ListAndWatch(stopCh <-chan struct{}) error {
glog.V(3).Infof("Listing and watching %v from %s", r.expectedType, r.name)
var resourceVersion string
resyncCh, cleanup := r.resyncChan()
defer cleanup()
// Explicitly set "0" as resource version - it's fine for the List()
// to be served from cache and potentially be delayed relative to
// etcd contents. Reflector framework will catch up via Watch() eventually.
options := api.ListOptions{ResourceVersion: "0"}
list, err := r.listerWatcher.List(options)
if err != nil {
return fmt.Errorf("%s: Failed to list %v: %v", r.name, r.expectedType, err)
}
listMetaInterface, err := meta.ListAccessor(list)
if err != nil {
return fmt.Errorf("%s: Unable to understand list result %#v: %v", r.name, list, err)
}
resourceVersion = listMetaInterface.GetResourceVersion()
items, err := meta.ExtractList(list)
if err != nil {
return fmt.Errorf("%s: Unable to understand list result %#v (%v)", r.name, list, err)
}
if err := r.syncWith(items, resourceVersion); err != nil {
return fmt.Errorf("%s: Unable to sync list result: %v", r.name, err)
}
r.setLastSyncResourceVersion(resourceVersion)
resyncerrc := make(chan error, 1)
go func() {
for {
select {
case <-resyncCh:
case <-stopCh:
return
}
glog.V(4).Infof("%s: next resync planned for %#v, forcing now", r.name, r.nextResync)
if err := r.store.Resync(); err != nil {
resyncerrc <- err
return
}
cleanup()
resyncCh, cleanup = r.resyncChan()
}
}()
for {
timemoutseconds := int64(minWatchTimeout.Seconds() * (rand.Float64() + 1.0))
options = api.ListOptions{
ResourceVersion: resourceVersion,
// We want to avoid situations of hanging watchers. Stop any wachers that do not
// receive any events within the timeout window.
TimeoutSeconds: &timemoutseconds,
}
w, err := r.listerWatcher.Watch(options)
if err != nil {
switch err {
case io.EOF:
// watch closed normally
case io.ErrUnexpectedEOF:
glog.V(1).Infof("%s: Watch for %v closed with unexpected EOF: %v", r.name, r.expectedType, err)
default:
utilruntime.HandleError(fmt.Errorf("%s: Failed to watch %v: %v", r.name, r.expectedType, err))
}
// If this is "connection refused" error, it means that most likely apiserver is not responsive.
// It doesn't make sense to re-list all objects because most likely we will be able to restart
// watch where we ended.
// If that's the case wait and resend watch request.
if urlError, ok := err.(*url.Error); ok {
if opError, ok := urlError.Err.(*net.OpError); ok {
if errno, ok := opError.Err.(syscall.Errno); ok && errno == syscall.ECONNREFUSED {
time.Sleep(time.Second)
continue
}
}
}
return nil
}
if err := r.watchHandler(w, &resourceVersion, resyncerrc, stopCh); err != nil {
if err != errorStopRequested {
glog.Warningf("%s: watch of %v ended with: %v", r.name, r.expectedType, err)
}
return nil
}
}
}