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()
}
Example #2
0
// 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)
}
Example #4
0
// 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
}
Example #5
0
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)
	}
}
Example #6
0
// 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)
}
Example #7
0
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
}
Example #8
0
// 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
		}
	}
}