Add Network.Services handler

network/handler/handler.go

@@ -123,3 +123,23 @@ func (n *Network) Routes(ctx context.Context, req *pbNet.RoutesRequest, resp *pb
 
 	return nil
 }
+
+// Services returns a list of services based on the routing table
+func (n *Network) Services(ctx context.Context, req *pbNet.ServicesRequest, resp *pbNet.ServicesResponse) error {
+	routes, err := n.Network.Options().Router.Table().List()
+	if err != nil {
+		return errors.InternalServerError("go.micro.network", "failed to list services: %s", err)
+	}
+
+	services := make(map[string]bool)
+
+	for _, route := range routes {
+		if _, ok := services[route.Service]; ok {
+			continue
+		}
+		services[route.Service] = true
+		resp.Services = append(resp.Services, route.Service)
+	}
+
+	return nil
+}

network/proto/network.micro.go

@@ -35,9 +35,14 @@ var _ server.Option
 // Client API for Network service
 
 type NetworkService interface {
+	// Returns the entire network graph
 	Graph(ctx context.Context, in *GraphRequest, opts ...client.CallOption) (*GraphResponse, error)
+	// Returns a list of known nodes in the network
 	Nodes(ctx context.Context, in *NodesRequest, opts ...client.CallOption) (*NodesResponse, error)
+	// Returns a list of known routes in the network
 	Routes(ctx context.Context, in *RoutesRequest, opts ...client.CallOption) (*RoutesResponse, error)
+	// Returns a list of known services based on routes
+	Services(ctx context.Context, in *ServicesRequest, opts ...client.CallOption) (*ServicesResponse, error)
 }
 
 type networkService struct {
@@ -88,12 +93,27 @@ func (c *networkService) Routes(ctx context.Context, in *RoutesRequest, opts ...
 	return out, nil
 }
 
+func (c *networkService) Services(ctx context.Context, in *ServicesRequest, opts ...client.CallOption) (*ServicesResponse, error) {
+	req := c.c.NewRequest(c.name, "Network.Services", in)
+	out := new(ServicesResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for Network service
 
 type NetworkHandler interface {
+	// Returns the entire network graph
 	Graph(context.Context, *GraphRequest, *GraphResponse) error
+	// Returns a list of known nodes in the network
 	Nodes(context.Context, *NodesRequest, *NodesResponse) error
+	// Returns a list of known routes in the network
 	Routes(context.Context, *RoutesRequest, *RoutesResponse) error
+	// Returns a list of known services based on routes
+	Services(context.Context, *ServicesRequest, *ServicesResponse) error
 }
 
 func RegisterNetworkHandler(s server.Server, hdlr NetworkHandler, opts ...server.HandlerOption) error {
@@ -101,6 +121,7 @@ func RegisterNetworkHandler(s server.Server, hdlr NetworkHandler, opts ...server
 		Graph(ctx context.Context, in *GraphRequest, out *GraphResponse) error
 		Nodes(ctx context.Context, in *NodesRequest, out *NodesResponse) error
 		Routes(ctx context.Context, in *RoutesRequest, out *RoutesResponse) error
+		Services(ctx context.Context, in *ServicesRequest, out *ServicesResponse) error
 	}
 	type Network struct {
 		network
@@ -124,3 +145,7 @@ func (h *networkHandler) Nodes(ctx context.Context, in *NodesRequest, out *Nodes
 func (h *networkHandler) Routes(ctx context.Context, in *RoutesRequest, out *RoutesResponse) error {
 	return h.NetworkHandler.Routes(ctx, in, out)
 }
+
+func (h *networkHandler) Services(ctx context.Context, in *ServicesRequest, out *ServicesResponse) error {
+	return h.NetworkHandler.Services(ctx, in, out)
+}

network/proto/network.pb.go

@@ -254,6 +254,76 @@ func (m *RoutesResponse) GetRoutes() []*proto1.Route {
 	return nil
 }
 
+type ServicesRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ServicesRequest) Reset()         { *m = ServicesRequest{} }
+func (m *ServicesRequest) String() string { return proto.CompactTextString(m) }
+func (*ServicesRequest) ProtoMessage()    {}
+func (*ServicesRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_0b7953b26a7c4730, []int{6}
+}
+
+func (m *ServicesRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServicesRequest.Unmarshal(m, b)
+}
+func (m *ServicesRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServicesRequest.Marshal(b, m, deterministic)
+}
+func (m *ServicesRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServicesRequest.Merge(m, src)
+}
+func (m *ServicesRequest) XXX_Size() int {
+	return xxx_messageInfo_ServicesRequest.Size(m)
+}
+func (m *ServicesRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServicesRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServicesRequest proto.InternalMessageInfo
+
+type ServicesResponse struct {
+	Services             []string `protobuf:"bytes,1,rep,name=services,proto3" json:"services,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ServicesResponse) Reset()         { *m = ServicesResponse{} }
+func (m *ServicesResponse) String() string { return proto.CompactTextString(m) }
+func (*ServicesResponse) ProtoMessage()    {}
+func (*ServicesResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_0b7953b26a7c4730, []int{7}
+}
+
+func (m *ServicesResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServicesResponse.Unmarshal(m, b)
+}
+func (m *ServicesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServicesResponse.Marshal(b, m, deterministic)
+}
+func (m *ServicesResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServicesResponse.Merge(m, src)
+}
+func (m *ServicesResponse) XXX_Size() int {
+	return xxx_messageInfo_ServicesResponse.Size(m)
+}
+func (m *ServicesResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServicesResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServicesResponse proto.InternalMessageInfo
+
+func (m *ServicesResponse) GetServices() []string {
+	if m != nil {
+		return m.Services
+	}
+	return nil
+}
+
 // Node is network node
 type Node struct {
 	// node id
@@ -269,7 +339,7 @@ func (m *Node) Reset()         { *m = Node{} }
 func (m *Node) String() string { return proto.CompactTextString(m) }
 func (*Node) ProtoMessage()    {}
 func (*Node) Descriptor() ([]byte, []int) {
-	return fileDescriptor_0b7953b26a7c4730, []int{6}
+	return fileDescriptor_0b7953b26a7c4730, []int{8}
 }
 
 func (m *Node) XXX_Unmarshal(b []byte) error {
@@ -317,7 +387,7 @@ func (m *Connect) Reset()         { *m = Connect{} }
 func (m *Connect) String() string { return proto.CompactTextString(m) }
 func (*Connect) ProtoMessage()    {}
 func (*Connect) Descriptor() ([]byte, []int) {
-	return fileDescriptor_0b7953b26a7c4730, []int{7}
+	return fileDescriptor_0b7953b26a7c4730, []int{9}
 }
 
 func (m *Connect) XXX_Unmarshal(b []byte) error {
@@ -358,7 +428,7 @@ func (m *Close) Reset()         { *m = Close{} }
 func (m *Close) String() string { return proto.CompactTextString(m) }
 func (*Close) ProtoMessage()    {}
 func (*Close) Descriptor() ([]byte, []int) {
-	return fileDescriptor_0b7953b26a7c4730, []int{8}
+	return fileDescriptor_0b7953b26a7c4730, []int{10}
 }
 
 func (m *Close) XXX_Unmarshal(b []byte) error {
@@ -401,7 +471,7 @@ func (m *Peer) Reset()         { *m = Peer{} }
 func (m *Peer) String() string { return proto.CompactTextString(m) }
 func (*Peer) ProtoMessage()    {}
 func (*Peer) Descriptor() ([]byte, []int) {
-	return fileDescriptor_0b7953b26a7c4730, []int{9}
+	return fileDescriptor_0b7953b26a7c4730, []int{11}
 }
 
 func (m *Peer) XXX_Unmarshal(b []byte) error {
@@ -443,6 +513,8 @@ func init() {
 	proto.RegisterType((*GraphResponse)(nil), "go.micro.network.GraphResponse")
 	proto.RegisterType((*RoutesRequest)(nil), "go.micro.network.RoutesRequest")
 	proto.RegisterType((*RoutesResponse)(nil), "go.micro.network.RoutesResponse")
+	proto.RegisterType((*ServicesRequest)(nil), "go.micro.network.ServicesRequest")
+	proto.RegisterType((*ServicesResponse)(nil), "go.micro.network.ServicesResponse")
 	proto.RegisterType((*Node)(nil), "go.micro.network.Node")
 	proto.RegisterType((*Connect)(nil), "go.micro.network.Connect")
 	proto.RegisterType((*Close)(nil), "go.micro.network.Close")
@@ -454,31 +526,33 @@ func init() {
 }
 
 var fileDescriptor_0b7953b26a7c4730 = []byte{
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -493,9 +567,14 @@ const _ = grpc.SupportPackageIsVersion4
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type NetworkClient interface {
+	// Returns the entire network graph
 	Graph(ctx context.Context, in *GraphRequest, opts ...grpc.CallOption) (*GraphResponse, error)
+	// Returns a list of known nodes in the network
 	Nodes(ctx context.Context, in *NodesRequest, opts ...grpc.CallOption) (*NodesResponse, error)
+	// Returns a list of known routes in the network
 	Routes(ctx context.Context, in *RoutesRequest, opts ...grpc.CallOption) (*RoutesResponse, error)
+	// Returns a list of known services based on routes
+	Services(ctx context.Context, in *ServicesRequest, opts ...grpc.CallOption) (*ServicesResponse, error)
 }
 
 type networkClient struct {
@@ -533,11 +612,25 @@ func (c *networkClient) Routes(ctx context.Context, in *RoutesRequest, opts ...g
 	return out, nil
 }
 
+func (c *networkClient) Services(ctx context.Context, in *ServicesRequest, opts ...grpc.CallOption) (*ServicesResponse, error) {
+	out := new(ServicesResponse)
+	err := c.cc.Invoke(ctx, "/go.micro.network.Network/Services", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // NetworkServer is the server API for Network service.
 type NetworkServer interface {
+	// Returns the entire network graph
 	Graph(context.Context, *GraphRequest) (*GraphResponse, error)
+	// Returns a list of known nodes in the network
 	Nodes(context.Context, *NodesRequest) (*NodesResponse, error)
+	// Returns a list of known routes in the network
 	Routes(context.Context, *RoutesRequest) (*RoutesResponse, error)
+	// Returns a list of known services based on routes
+	Services(context.Context, *ServicesRequest) (*ServicesResponse, error)
 }
 
 func RegisterNetworkServer(s *grpc.Server, srv NetworkServer) {
@@ -598,6 +691,24 @@ func _Network_Routes_Handler(srv interface{}, ctx context.Context, dec func(inte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Network_Services_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ServicesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(NetworkServer).Services(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/go.micro.network.Network/Services",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(NetworkServer).Services(ctx, req.(*ServicesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _Network_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "go.micro.network.Network",
 	HandlerType: (*NetworkServer)(nil),
@@ -614,6 +725,10 @@ var _Network_serviceDesc = grpc.ServiceDesc{
 			MethodName: "Routes",
 			Handler:    _Network_Routes_Handler,
 		},
+		{
+			MethodName: "Services",
+			Handler:    _Network_Services_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "github.com/micro/go-micro/network/proto/network.proto",

network/proto/network.proto

@@ -6,9 +6,14 @@ import "github.com/micro/go-micro/router/proto/router.proto";
 
 // Network service is usesd to gain visibility into networks
 service Network {
+	// Returns the entire network graph
 	rpc Graph(GraphRequest) returns (GraphResponse) {};
+	// Returns a list of known nodes in the network
         rpc Nodes(NodesRequest) returns (NodesResponse) {};
+	// Returns a list of known routes in the network
         rpc Routes(RoutesRequest) returns (RoutesResponse) {};
+	// Returns a list of known services based on routes
+	rpc Services(ServicesRequest) returns (ServicesResponse) {};
 }
 
 // PeerRequest requests list of peers
@@ -39,6 +44,12 @@ message RoutesResponse {
 	repeated go.micro.router.Route routes = 1;
 }
 
+message ServicesRequest {}
+
+message ServicesResponse {
+	repeated string services = 1;
+}
+
 // Node is network node
 message Node {
         // node id