[#338] pool: Support avg request time for ListContainerStream

Signed-off-by: Ekaterina Lebedeva <ekaterina.lebedeva@yadro.com>

pool/client.go

@@ -90,6 +90,8 @@ func (m MethodIndex) String() string {
 		return "containerGet"
 	case methodContainerList:
 		return "containerList"
+	case methodContainerListStream:
+		return "containerListStream"
 	case methodContainerDelete:
 		return "containerDelete"
 	case methodEndpointInfo:
@@ -457,13 +459,16 @@ type PrmListStream struct {
 //
 // Must be initialized using Pool.ListContainersStream, any other usage is unsafe.
 type ResListStream struct {
-	r           *sdkClient.ContainerListReader
-	handleError func(context.Context, apistatus.Status, error) error
+	r                   *sdkClient.ContainerListReader
+	elapsedTimeCallback func(time.Duration)
+	handleError         func(context.Context, apistatus.Status, error) error
 }
 
 // Read reads another list of the container identifiers.
 func (x *ResListStream) Read(buf []cid.ID) (int, error) {
+	start := time.Now()
 	n, ok := x.r.Read(buf)
+	x.elapsedTimeCallback(time.Since(start))
 	if !ok {
 		res, err := x.r.Close()
 		if err == nil {
@@ -487,7 +492,14 @@ func (x *ResListStream) Read(buf []cid.ID) (int, error) {
 //
 // Returns an error if container can't be read.
 func (x *ResListStream) Iterate(f func(cid.ID) bool) error {
-	return x.r.Iterate(f)
+	start := time.Now()
+	err := x.r.Iterate(func(id cid.ID) bool {
+		x.elapsedTimeCallback(time.Since(start))
+		stop := f(id)
+		start = time.Now()
+		return stop
+	})
+	return err
 }
 
 // Close ends reading list of the matched containers and returns the result of the operation
@@ -508,11 +520,19 @@ func (c *clientWrapper) containerListStream(ctx context.Context, prm PrmListStre
 		Session: prm.Session,
 	}
 
-	res, err := cl.ContainerListInit(ctx, cliPrm)
+	start := time.Now()
+	cnrRdr, err := cl.ContainerListInit(ctx, cliPrm)
+	c.incRequests(time.Since(start), methodContainerListStream)
 	if err = c.handleError(ctx, nil, err); err != nil {
 		return ResListStream{}, fmt.Errorf("init container listing on client: %w", err)
 	}
-	return ResListStream{r: res, handleError: c.handleError}, nil
+	return ResListStream{
+		r: cnrRdr,
+		elapsedTimeCallback: func(elapsed time.Duration) {
+			c.incRequests(elapsed, methodContainerListStream)
+		},
+		handleError: c.handleError,
+	}, nil
 }
 
 // containerDelete invokes sdkClient.ContainerDelete parse response status to error.

pool/statistic.go

@@ -97,6 +97,11 @@ func (n NodeStatistic) AverageListContainer() time.Duration {
 	return n.averageTime(methodContainerList)
 }
 
+// AverageListContainerStream returns average time to perform ContainerListStream request.
+func (n NodeStatistic) AverageListContainerStream() time.Duration {
+	return n.averageTime(methodContainerListStream)
+}
+
 // AverageDeleteContainer returns average time to perform ContainerDelete request.
 func (n NodeStatistic) AverageDeleteContainer() time.Duration {
 	return n.averageTime(methodContainerDelete)