Remove deprecated APIs (#667)

Fixes #494.

exporter/prometheus/example/main.go

@@ -48,7 +48,7 @@ func main() {
 	// Create view to see the amount of video processed
 	// Subscribe will allow view data to be exported.
 	// Once no longer needed, you can unsubscribe from the view.
-	if err = view.Subscribe(
+	if err = view.Register(
 		&view.View{
 			Name:        "video_count",
 			Description: "number of videos processed over time",

exporter/stackdriver/example_test.go

@@ -35,7 +35,7 @@ func Example() {
 	view.RegisterExporter(exporter)
 
 	// Subscribe views to see stats in Stackdriver Monitoring.
-	if err := view.Subscribe(
+	if err := view.Register(
 		ochttp.ClientLatencyView,
 		ochttp.ClientResponseBytesView,
 	); err != nil {

exporter/stackdriver/examples/stats/main.go

@@ -59,7 +59,7 @@ func main() {
 	// Create view to see the processed video size cumulatively.
 	// Subscribe will allow view data to be exported.
 	// Once no longer need, you can unsubscribe from the view.
-	if err := view.Subscribe(&view.View{
+	if err := view.Register(&view.View{
 		Name:        "my.org/views/video_size_cum",
 		Description: "processed video size over time",
 		Measure:     videoSize,

exporter/stackdriver/stats_test.go

@@ -677,10 +677,10 @@ func TestExporter_makeReq_withCustomMonitoredResource(t *testing.T) {
 		Measure:     m,
 		Aggregation: view.Count(),
 	}
-	if err := view.Subscribe(v); err != nil {
+	if err := view.Register(v); err != nil {
 		t.Fatal(err)
 	}
-	defer view.Unsubscribe(v)
+	defer view.Unregister(v)
 
 	start := time.Now()
 	end := start.Add(time.Minute)

internal/readme/stats.go

@@ -40,7 +40,7 @@ func statsExamples() {
 	_, _, _ = distAgg, countAgg, sumAgg
 
 	// START view
-	if err := view.Subscribe(&view.View{
+	if err := view.Register(&view.View{
 		Name:        "my.org/video_size_distribution",
 		Description: "distribution of processed video size over time",
 		Measure:     videoSize,

plugin/ocgrpc/client_stats_handler_test.go

@@ -299,7 +299,7 @@ func TestClientDefaultCollections(t *testing.T) {
 
 	for _, tc := range tcs {
 		// Register views.
-		if err := view.Subscribe(DefaultClientViews...); err != nil {
+		if err := view.Register(DefaultClientViews...); err != nil {
 			t.Error(err)
 		}
 
@@ -349,7 +349,7 @@ func TestClientDefaultCollections(t *testing.T) {
 		}
 
 		// Unregister views to cleanup.
-		view.Unsubscribe(DefaultClientViews...)
+		view.Unregister(DefaultClientViews...)
 	}
 }
 

plugin/ocgrpc/example_test.go

@@ -24,7 +24,7 @@ import (
 
 func ExampleClientHandler() {
 	// Subscribe views to collect data.
-	if err := view.Subscribe(ocgrpc.DefaultClientViews...); err != nil {
+	if err := view.Register(ocgrpc.DefaultClientViews...); err != nil {
 		log.Fatal(err)
 	}
 
@@ -39,7 +39,7 @@ func ExampleClientHandler() {
 
 func ExampleServerHandler() {
 	// Subscribe to views to collect data.
-	if err := view.Subscribe(ocgrpc.DefaultServerViews...); err != nil {
+	if err := view.Register(ocgrpc.DefaultServerViews...); err != nil {
 		log.Fatal(err)
 	}
 

plugin/ocgrpc/grpc_test.go

@@ -31,7 +31,7 @@ func TestClientHandler(t *testing.T) {
 	ctx := context.Background()
 	te := &traceExporter{}
 	trace.RegisterExporter(te)
-	if err := ClientRequestCountView.Subscribe(); err != nil {
+	if err := view.Register(ClientRequestCountView); err != nil {
 		t.Fatal(err)
 	}
 
@@ -67,7 +67,7 @@ func TestClientHandler(t *testing.T) {
 	}
 
 	// Cleanup.
-	view.Unsubscribe(ClientErrorCountView)
+	view.Unregister(ClientErrorCountView)
 }
 
 func TestServerHandler(t *testing.T) {
@@ -94,7 +94,7 @@ func TestServerHandler(t *testing.T) {
 
 			te := &traceExporter{}
 			trace.RegisterExporter(te)
-			if err := ServerRequestCountView.Subscribe(); err != nil {
+			if err := view.Register(ServerRequestCountView); err != nil {
 				t.Fatal(err)
 			}
 
@@ -126,7 +126,7 @@ func TestServerHandler(t *testing.T) {
 			}
 
 			// Cleanup.
-			view.Unsubscribe(ServerRequestCountView)
+			view.Unregister(ServerRequestCountView)
 		})
 	}
 }

plugin/ocgrpc/server_stats_handler_test.go

@@ -298,7 +298,7 @@ func TestServerDefaultCollections(t *testing.T) {
 	}
 
 	for _, tc := range tcs {
-		if err := view.Subscribe(DefaultServerViews...); err != nil {
+		if err := view.Register(DefaultServerViews...); err != nil {
 			t.Fatal(err)
 		}
 
@@ -349,7 +349,7 @@ func TestServerDefaultCollections(t *testing.T) {
 		}
 
 		// Unregister views to cleanup.
-		view.Unsubscribe(DefaultServerViews...)
+		view.Unregister(DefaultServerViews...)
 	}
 }
 

plugin/ochttp/client_test.go

@@ -36,8 +36,8 @@ func TestClient(t *testing.T) {
 	}))
 	defer server.Close()
 
-	for _, v := range ochttp.DefaultClientViews {
-		v.Subscribe()
+	if err := view.Register(ochttp.DefaultClientViews...); err != nil {
+		t.Fatalf("Failed to register ochttp.DefaultClientViews error: %v", err)
 	}
 
 	views := []string{
@@ -54,15 +54,14 @@ func TestClient(t *testing.T) {
 		}
 	}
 
-	var (
-		w    sync.WaitGroup
-		tr   ochttp.Transport
-		errs = make(chan error, reqCount)
-	)
-	w.Add(reqCount)
+	var wg sync.WaitGroup
+	var tr ochttp.Transport
+	errs := make(chan error, reqCount)
+	wg.Add(reqCount)
+
 	for i := 0; i < reqCount; i++ {
 		go func() {
-			defer w.Done()
+			defer wg.Done()
 			req, err := http.NewRequest("POST", server.URL, strings.NewReader("req-body"))
 			if err != nil {
 				errs <- fmt.Errorf("error creating request: %v", err)
@@ -81,7 +80,7 @@ func TestClient(t *testing.T) {
 	}
 
 	go func() {
-		w.Wait()
+		wg.Wait()
 		close(errs)
 	}()
 

plugin/ochttp/example_test.go

@@ -25,13 +25,13 @@ import (
 )
 
 func ExampleTransport() {
-	if err := view.Subscribe(
-		// Subscribe to a few default views.
+	if err := view.Register(
+		// Register to a few default views.
 		ochttp.ClientRequestCountByMethod,
 		ochttp.ClientResponseCountByStatusCode,
 		ochttp.ClientLatencyView,
 
-		// Subscribe to a custom view.
+		// Register to a custom view.
 		&view.View{
 			Name:        "httpclient_latency_by_hostpath",
 			TagKeys:     []tag.Key{ochttp.Host, ochttp.Path},

plugin/ochttp/server_test.go

@@ -34,8 +34,8 @@ func updateMean(mean float64, sample, count int) float64 {
 }
 
 func TestHandlerStatsCollection(t *testing.T) {
-	for _, v := range DefaultServerViews {
-		v.Subscribe()
+	if err := view.Register(DefaultServerViews...); err != nil {
+		t.Fatalf("Failed to register ochttp.DefaultServerViews error: %v", err)
 	}
 
 	views := []string{

stats/view/view.go

@@ -46,20 +46,6 @@ type View struct {
 	Aggregation *Aggregation
 }
 
-// Deprecated: Use &View{}.
-func New(name, description string, keys []tag.Key, measure stats.Measure, agg *Aggregation) (*View, error) {
-	if measure == nil {
-		panic("measure may not be nil")
-	}
-	return &View{
-		Name:        name,
-		Description: description,
-		TagKeys:     keys,
-		Measure:     measure,
-		Aggregation: agg,
-	}, nil
-}
-
 // WithName returns a copy of the View with a new name. This is useful for
 // renaming views to cope with limitations placed on metric names by various
 // backends.

stats/view/view_measure_test.go

@@ -28,7 +28,7 @@ func TestMeasureFloat64AndInt64(t *testing.T) {
 		Measure:     fm,
 		Aggregation: Sum(),
 	}
-	Subscribe(v1, v2)
+	Register(v1, v2)
 
 	stats.Record(context.Background(), im.M(5))
 	stats.Record(context.Background(), fm.M(2.2))

stats/view/worker.go

@@ -61,22 +61,6 @@ func Find(name string) (v *View) {
 	return resp.v
 }
 
-// Deprecated: Use the Register function
-func Subscribe(v ...*View) error {
-	return Register(v...)
-}
-
-// Deprecated: Use the Unregister function
-func Unsubscribe(v ...*View) error {
-	Unregister(v...)
-	return nil
-}
-
-// Deprecated: Use the Register function.
-func (v *View) Subscribe() error {
-	return Register(v)
-}
-
 // Register begins collecting data for the given views.
 // Once a view is subscribed, it reports data to the registered exporters.
 func Register(views ...*View) error {
@@ -110,15 +94,6 @@ func Unregister(views ...*View) {
 	<-req.done
 }
 
-// Deprecated: Use the Unregister function instead.
-func (v *View) Unsubscribe() error {
-	if v == nil {
-		return nil
-	}
-	Unregister(v)
-	return nil
-}
-
 func RetrieveData(viewName string) ([]*Row, error) {
 	req := &retrieveDataReq{
 		now: time.Now(),

stats/view/worker_commands.go

@@ -41,7 +41,12 @@ type getViewByNameResp struct {
 }
 
 func (cmd *getViewByNameReq) handleCommand(w *worker) {
-	cmd.c <- &getViewByNameResp{w.views[cmd.name].view}
+	v := w.views[cmd.name]
+	if v == nil {
+		cmd.c <- &getViewByNameResp{nil}
+		return
+	}
+	cmd.c <- &getViewByNameResp{v.view}
 }
 
 // registerViewReq is the command to register a view.

stats/view/worker_test.go

@@ -231,12 +231,8 @@ func Test_Worker_RecordFloat64(t *testing.T) {
 			}
 		}
 
-		// cleaning up
-		for _, v := range tc.registrations {
-			if err := v.Unsubscribe(); err != nil {
-				t.Fatalf("%v: Unregistering from view %v errored with %v; want no error", tc.label, v.Name, err)
-			}
-		}
+		// Cleaning up.
+		Unregister(tc.registrations...)
 	}
 }
 
@@ -320,7 +316,11 @@ func TestWorkerStarttime(t *testing.T) {
 
 	ctx := context.Background()
 	m := stats.Int64("measure/TestWorkerStarttime", "desc", "unit")
-	v, _ := New("testview", "", nil, m, Count())
+	v := &View{
+		Name:        "testview",
+		Measure:     m,
+		Aggregation: Count(),
+	}
 
 	SetReportingPeriod(25 * time.Millisecond)
 	if err := Register(v); err != nil {

trace/sampling.go

@@ -24,12 +24,6 @@ func newDefaultSampler() Sampler {
 	return ProbabilitySampler(defaultSamplingProbability)
 }
 
-// SetDefaultSampler sets the default sampler used when creating new spans.
-//
-// Deprecated: Use ApplyConfig.
-func SetDefaultSampler(sampler Sampler) {
-}
-
 // Sampler decides whether a trace should be sampled and exported.
 type Sampler func(SamplingParameters) SamplingDecision