Add registration time chain element

Signed-off-by: Artem Glazychev <artem.glazychev@xored.com>

pkg/registry/chains/memory/server.go

@@ -33,6 +33,7 @@ import (
 	"github.com/networkservicemesh/sdk/pkg/registry/common/serialize"
 	"github.com/networkservicemesh/sdk/pkg/registry/common/setlogoption"
 	"github.com/networkservicemesh/sdk/pkg/registry/common/setpayload"
+	"github.com/networkservicemesh/sdk/pkg/registry/common/setregistrationtime"
 	"github.com/networkservicemesh/sdk/pkg/registry/core/chain"
 )
 
@@ -41,6 +42,7 @@ func NewServer(ctx context.Context, expiryDuration time.Duration, proxyRegistryU
 	nseChain := chain.NewNetworkServiceEndpointRegistryServer(
 		setlogoption.NewNetworkServiceEndpointRegistryServer(map[string]string{}),
 		serialize.NewNetworkServiceEndpointRegistryServer(),
+		setregistrationtime.NewNetworkServiceEndpointRegistryServer(),
 		expire.NewNetworkServiceEndpointRegistryServer(ctx, expiryDuration),
 		checkid.NewNetworkServiceEndpointRegistryServer(),
 		memory.NewNetworkServiceEndpointRegistryServer(),

pkg/registry/common/setregistrationtime/doc.go

@@ -0,0 +1,18 @@
+// Copyright (c) 2021 Doc.ai and/or its affiliates.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package setregistrationtime provides registry server chain elements for initial registration time setting
+package setregistrationtime

pkg/registry/common/setregistrationtime/nse_server.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2021 Doc.ai and/or its affiliates.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package setregistrationtime
+
+import (
+	"context"
+
+	"github.com/golang/protobuf/ptypes/empty"
+	"github.com/networkservicemesh/api/pkg/api/registry"
+	"google.golang.org/protobuf/types/known/timestamppb"
+
+	"github.com/networkservicemesh/sdk/pkg/registry/core/next"
+	"github.com/networkservicemesh/sdk/pkg/tools/clock"
+)
+
+type setregtimeNSEServer struct{}
+
+// NewNetworkServiceEndpointRegistryServer creates a new NetworkServiceServer chain element that sets initial
+// registration time.
+func NewNetworkServiceEndpointRegistryServer() registry.NetworkServiceEndpointRegistryServer {
+	return &setregtimeNSEServer{}
+}
+
+func (r *setregtimeNSEServer) Register(ctx context.Context, nse *registry.NetworkServiceEndpoint) (*registry.NetworkServiceEndpoint, error) {
+	if nse.InitialRegistrationTime == nil {
+		nse.InitialRegistrationTime = timestamppb.New(clock.FromContext(ctx).Now())
+	}
+
+	return next.NetworkServiceEndpointRegistryServer(ctx).Register(ctx, nse)
+}
+
+func (r *setregtimeNSEServer) Find(q *registry.NetworkServiceEndpointQuery, s registry.NetworkServiceEndpointRegistry_FindServer) error {
+	return next.NetworkServiceEndpointRegistryServer(s.Context()).Find(q, s)
+}
+
+func (r *setregtimeNSEServer) Unregister(ctx context.Context, nse *registry.NetworkServiceEndpoint) (*empty.Empty, error) {
+	return next.NetworkServiceEndpointRegistryServer(ctx).Unregister(ctx, nse)
+}

pkg/registry/common/setregistrationtime/nse_server_test.go

@@ -0,0 +1,101 @@
+// Copyright (c) 2021 Doc.ai and/or its affiliates.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package setregistrationtime_test
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/networkservicemesh/api/pkg/api/registry"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/protobuf/proto"
+
+	"github.com/networkservicemesh/sdk/pkg/tools/clock"
+	"github.com/networkservicemesh/sdk/pkg/tools/clockmock"
+
+	"github.com/networkservicemesh/sdk/pkg/registry/common/memory"
+	"github.com/networkservicemesh/sdk/pkg/registry/common/setregistrationtime"
+	"github.com/networkservicemesh/sdk/pkg/registry/core/next"
+	"github.com/networkservicemesh/sdk/pkg/registry/core/streamchannel"
+)
+
+func testNSE() *registry.NetworkServiceEndpoint {
+	return &registry.NetworkServiceEndpoint{
+		Name: "nse",
+		Url:  "tcp://0.0.0.0",
+	}
+}
+
+func TestRegTimeServer_Register(t *testing.T) {
+	s := next.NewNetworkServiceEndpointRegistryServer(
+		setregistrationtime.NewNetworkServiceEndpointRegistryServer(),
+		memory.NewNetworkServiceEndpointRegistryServer(),
+	)
+
+	ctx := context.Background()
+	clockMock := clockmock.New(ctx)
+	ctx = clock.WithClock(ctx, clockMock)
+
+	// 1. Register
+	reg, err := s.Register(ctx, testNSE())
+	require.NoError(t, err)
+	require.NotNil(t, reg.InitialRegistrationTime)
+	require.Equal(t, clockMock.Now(), reg.InitialRegistrationTime.AsTime().Local())
+	registeredNse := reg.Clone()
+
+	// 2. Find
+	nses := find(t, s, &registry.NetworkServiceEndpointQuery{
+		NetworkServiceEndpoint: new(registry.NetworkServiceEndpoint),
+	})
+	require.Len(t, nses, 1)
+	require.True(t, proto.Equal(nses[0].InitialRegistrationTime, registeredNse.InitialRegistrationTime))
+
+	// 3. Refresh
+	reg, err = s.Register(ctx, reg.Clone())
+	require.NoError(t, err)
+	require.NotNil(t, reg.InitialRegistrationTime)
+	require.True(t, proto.Equal(reg.InitialRegistrationTime, registeredNse.InitialRegistrationTime))
+
+	// 4. Unregister
+	_, err = s.Unregister(ctx, reg.Clone())
+	require.NoError(t, err)
+
+	// 5. Register again
+	clockMock.Add(time.Second * 3)
+	reg, err = s.Register(ctx, testNSE())
+	require.NoError(t, err)
+	require.NotNil(t, reg.InitialRegistrationTime)
+	require.Equal(t, clockMock.Now(), reg.InitialRegistrationTime.AsTime().Local())
+}
+
+func find(t *testing.T, mem registry.NetworkServiceEndpointRegistryServer, query *registry.NetworkServiceEndpointQuery) (nses []*registry.NetworkServiceEndpoint) {
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+
+	ch := make(chan *registry.NetworkServiceEndpointResponse)
+	go func() {
+		defer close(ch)
+		require.NoError(t, mem.Find(query, streamchannel.NewNetworkServiceEndpointFindServer(ctx, ch)))
+	}()
+
+	for nseResp := range ch {
+		nses = append(nses, nseResp.NetworkServiceEndpoint)
+	}
+
+	return nses
+}