Use NetworkServiceResponses instead of NetworkServices in memory regi…

…stry (networkservicemesh#1677) * use NetworkServiceResponses instead of NetworkServices in memory registry Signed-off-by: NikitaSkrynnik <nikita.skrynnik@xored.com> * add a test for checking field Signed-off-by: NikitaSkrynnik <nikita.skrynnik@xored.com> * fix go lintre issues Signed-off-by: NikitaSkrynnik <nikita.skrynnik@xored.com> * fix concurrency problems in the test Signed-off-by: NikitaSkrynnik <nikita.skrynnik@xored.com> --------- Signed-off-by: NikitaSkrynnik <nikita.skrynnik@xored.com>
NikitaSkrynnik · Oct 7, 2024 · 76b397f · 76b397f
1 parent 95c7ff7
commit 76b397f
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Showing 2 changed files with 53 additions and 19 deletions.
diff --git a/pkg/registry/common/memory/ns_server.go b/pkg/registry/common/memory/ns_server.go
@@ -1,6 +1,6 @@
 // Copyright (c) 2020-2021 Doc.ai and/or its affiliates.
 //
-// Copyright (c) 2023 Cisco and/or its affiliates.
+// Copyright (c) 2023-2024 Cisco and/or its affiliates.
 //
 // SPDX-License-Identifier: Apache-2.0
 //
@@ -37,15 +37,15 @@ import (
 type memoryNSServer struct {
 	networkServices  genericsync.Map[string, *registry.NetworkService]
 	executor         serialize.Executor
-	eventChannels    map[string]chan *registry.NetworkService
+	eventChannels    map[string]chan *registry.NetworkServiceResponse
 	eventChannelSize int
 }
 
 // NewNetworkServiceRegistryServer creates new memory based NetworkServiceRegistryServer
 func NewNetworkServiceRegistryServer(options ...Option) registry.NetworkServiceRegistryServer {
 	s := &memoryNSServer{
 		eventChannelSize: defaultEventChannelSize,
-		eventChannels:    make(map[string]chan *registry.NetworkService),
+		eventChannels:    make(map[string]chan *registry.NetworkServiceResponse),
 	}
 	for _, o := range options {
 		o.apply(s)
@@ -65,12 +65,12 @@ func (s *memoryNSServer) Register(ctx context.Context, ns *registry.NetworkServi
 
 	s.networkServices.Store(r.Name, r.Clone())
 
-	s.sendEvent(r)
+	s.sendEvent(&registry.NetworkServiceResponse{NetworkService: r})
 
 	return r, nil
 }
 
-func (s *memoryNSServer) sendEvent(event *registry.NetworkService) {
+func (s *memoryNSServer) sendEvent(event *registry.NetworkServiceResponse) {
 	event = event.Clone()
 	s.executor.AsyncExec(func() {
 		for _, ch := range s.eventChannels {
@@ -93,13 +93,13 @@ func (s *memoryNSServer) Find(query *registry.NetworkServiceQuery, server regist
 		return next.NetworkServiceRegistryServer(server.Context()).Find(query, server)
 	}
 
-	eventCh := make(chan *registry.NetworkService, s.eventChannelSize)
+	eventCh := make(chan *registry.NetworkServiceResponse, s.eventChannelSize)
 	id := uuid.New().String()
 
 	s.executor.AsyncExec(func() {
 		s.eventChannels[id] = eventCh
 		for _, entity := range s.allMatches(query) {
-			eventCh <- entity
+			eventCh <- &registry.NetworkServiceResponse{NetworkService: entity}
 		}
 	})
 	defer s.closeEventChannel(id, eventCh)
@@ -123,7 +123,7 @@ func (s *memoryNSServer) allMatches(query *registry.NetworkServiceQuery) (matche
 	return matches
 }
 
-func (s *memoryNSServer) closeEventChannel(id string, eventCh <-chan *registry.NetworkService) {
+func (s *memoryNSServer) closeEventChannel(id string, eventCh <-chan *registry.NetworkServiceResponse) {
 	ctx, cancel := context.WithCancel(context.Background())
 
 	s.executor.AsyncExec(func() {
@@ -143,30 +143,28 @@ func (s *memoryNSServer) closeEventChannel(id string, eventCh <-chan *registry.N
 func (s *memoryNSServer) receiveEvent(
 	query *registry.NetworkServiceQuery,
 	server registry.NetworkServiceRegistry_FindServer,
-	eventCh <-chan *registry.NetworkService,
+	eventCh <-chan *registry.NetworkServiceResponse,
 ) error {
 	select {
 	case <-server.Context().Done():
 		return errors.WithStack(io.EOF)
 	case event := <-eventCh:
-		if matchutils.MatchNetworkServices(query.NetworkService, event) {
-			nse := &registry.NetworkServiceResponse{
-				NetworkService: event,
-			}
-
-			if err := server.Send(nse); err != nil {
+		if matchutils.MatchNetworkServices(query.NetworkService, event.NetworkService) {
+			if err := server.Send(event); err != nil {
 				if server.Context().Err() != nil {
 					return errors.WithStack(io.EOF)
 				}
-				return errors.Wrapf(err, "NetworkServiceRegistry find server failed to send a response %s", nse.String())
+				return errors.Wrapf(err, "NetworkServiceRegistry find server failed to send a response %s", event.String())
 			}
 		}
 		return nil
 	}
 }
 
 func (s *memoryNSServer) Unregister(ctx context.Context, ns *registry.NetworkService) (*empty.Empty, error) {
-	s.networkServices.Delete(ns.Name)
-
+	if unregisterNS, ok := s.networkServices.LoadAndDelete(ns.GetName()); ok {
+		unregisterNS = unregisterNS.Clone()
+		s.sendEvent(&registry.NetworkServiceResponse{NetworkService: unregisterNS, Deleted: true})
+	}
 	return next.NetworkServiceRegistryServer(ctx).Unregister(ctx, ns)
 }
diff --git a/pkg/registry/common/memory/ns_server_test.go b/pkg/registry/common/memory/ns_server_test.go
@@ -1,6 +1,6 @@
 // Copyright (c) 2020-2022 Doc.ai and/or its affiliates.
 //
-// Copyright (c) 2023 Cisco Systems, Inc.
+// Copyright (c) 2023-2024 Cisco Systems, Inc.
 //
 // SPDX-License-Identifier: Apache-2.0
 //
@@ -251,6 +251,42 @@ func TestNetworkServiceRegistryServer_ShouldReceiveAllRegisters(t *testing.T) {
 	wgWait(ctx, t, &wg)
 }
 
+func TestNetworkServiceRegistryServer_DeleteEvent(t *testing.T) {
+	t.Cleanup(func() { goleak.VerifyNone(t) })
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+	defer cancel()
+
+	s := memory.NewNetworkServiceRegistryServer()
+
+	ns, err := s.Register(ctx, &registry.NetworkService{Name: "ns"})
+	require.NoError(t, err)
+
+	findCtx, findCancel := context.WithCancel(ctx)
+	defer findCancel()
+
+	ch := make(chan *registry.NetworkServiceResponse, 2)
+	go func() {
+		defer close(ch)
+		findErr := s.Find(&registry.NetworkServiceQuery{
+			NetworkService: &registry.NetworkService{Name: "ns"},
+			Watch:          true,
+		}, streamchannel.NewNetworkServiceFindServer(findCtx, ch))
+		require.NoError(t, findErr)
+	}()
+
+	nsResp := <-ch
+	require.False(t, nsResp.Deleted)
+
+	_, err = s.Unregister(ctx, ns)
+	require.NoError(t, err)
+
+	// Read unregister event
+	nsResp, err = readNSResponse(findCtx, ch)
+	require.NoError(t, err)
+	require.True(t, nsResp.Deleted)
+}
+
 func readNSResponse(ctx context.Context, ch <-chan *registry.NetworkServiceResponse) (*registry.NetworkServiceResponse, error) {
 	select {
 	case <-ctx.Done():