Merge pull request #780 from milosgajdos83/registry-event

[WIP] Registry event

registry/proto/registry.micro.go

@@ -1,5 +1,5 @@
 // Code generated by protoc-gen-micro. DO NOT EDIT.
-// source: micro/go-micro/registry/proto/registry.proto
+// source: registry.proto
 
 package go_micro_registry
 

registry/proto/registry.pb.go

@@ -1,13 +1,11 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
-// source: micro/go-micro/registry/proto/registry.proto
+// source: registry.proto
 
 package go_micro_registry
 
 import (
-	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
-	grpc "google.golang.org/grpc"
 	math "math"
 )
 
@@ -22,6 +20,35 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
+// EventType defines the type of event
+type EventType int32
+
+const (
+	EventType_Create EventType = 0
+	EventType_Delete EventType = 1
+	EventType_Update EventType = 2
+)
+
+var EventType_name = map[int32]string{
+	0: "Create",
+	1: "Delete",
+	2: "Update",
+}
+
+var EventType_value = map[string]int32{
+	"Create": 0,
+	"Delete": 1,
+	"Update": 2,
+}
+
+func (x EventType) String() string {
+	return proto.EnumName(EventType_name, int32(x))
+}
+
+func (EventType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_41af05d40a615591, []int{0}
+}
+
 // Service represents a go-micro service
 type Service struct {
 	Name                 string            `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
@@ -38,7 +65,7 @@ func (m *Service) Reset()         { *m = Service{} }
 func (m *Service) String() string { return proto.CompactTextString(m) }
 func (*Service) ProtoMessage()    {}
 func (*Service) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{0}
+	return fileDescriptor_41af05d40a615591, []int{0}
 }
 
 func (m *Service) XXX_Unmarshal(b []byte) error {
@@ -109,7 +136,7 @@ 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_f287a6b809166ad2, []int{1}
+	return fileDescriptor_41af05d40a615591, []int{1}
 }
 
 func (m *Node) XXX_Unmarshal(b []byte) error {
@@ -173,7 +200,7 @@ func (m *Endpoint) Reset()         { *m = Endpoint{} }
 func (m *Endpoint) String() string { return proto.CompactTextString(m) }
 func (*Endpoint) ProtoMessage()    {}
 func (*Endpoint) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{2}
+	return fileDescriptor_41af05d40a615591, []int{2}
 }
 
 func (m *Endpoint) XXX_Unmarshal(b []byte) error {
@@ -236,7 +263,7 @@ func (m *Value) Reset()         { *m = Value{} }
 func (m *Value) String() string { return proto.CompactTextString(m) }
 func (*Value) ProtoMessage()    {}
 func (*Value) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{3}
+	return fileDescriptor_41af05d40a615591, []int{3}
 }
 
 func (m *Value) XXX_Unmarshal(b []byte) error {
@@ -292,7 +319,7 @@ func (m *Result) Reset()         { *m = Result{} }
 func (m *Result) String() string { return proto.CompactTextString(m) }
 func (*Result) ProtoMessage()    {}
 func (*Result) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{4}
+	return fileDescriptor_41af05d40a615591, []int{4}
 }
 
 func (m *Result) XXX_Unmarshal(b []byte) error {
@@ -344,7 +371,7 @@ func (m *EmptyResponse) Reset()         { *m = EmptyResponse{} }
 func (m *EmptyResponse) String() string { return proto.CompactTextString(m) }
 func (*EmptyResponse) ProtoMessage()    {}
 func (*EmptyResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{5}
+	return fileDescriptor_41af05d40a615591, []int{5}
 }
 
 func (m *EmptyResponse) XXX_Unmarshal(b []byte) error {
@@ -376,7 +403,7 @@ func (m *GetRequest) Reset()         { *m = GetRequest{} }
 func (m *GetRequest) String() string { return proto.CompactTextString(m) }
 func (*GetRequest) ProtoMessage()    {}
 func (*GetRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{6}
+	return fileDescriptor_41af05d40a615591, []int{6}
 }
 
 func (m *GetRequest) XXX_Unmarshal(b []byte) error {
@@ -415,7 +442,7 @@ func (m *GetResponse) Reset()         { *m = GetResponse{} }
 func (m *GetResponse) String() string { return proto.CompactTextString(m) }
 func (*GetResponse) ProtoMessage()    {}
 func (*GetResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{7}
+	return fileDescriptor_41af05d40a615591, []int{7}
 }
 
 func (m *GetResponse) XXX_Unmarshal(b []byte) error {
@@ -453,7 +480,7 @@ func (m *ListRequest) Reset()         { *m = ListRequest{} }
 func (m *ListRequest) String() string { return proto.CompactTextString(m) }
 func (*ListRequest) ProtoMessage()    {}
 func (*ListRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{8}
+	return fileDescriptor_41af05d40a615591, []int{8}
 }
 
 func (m *ListRequest) XXX_Unmarshal(b []byte) error {
@@ -485,7 +512,7 @@ func (m *ListResponse) Reset()         { *m = ListResponse{} }
 func (m *ListResponse) String() string { return proto.CompactTextString(m) }
 func (*ListResponse) ProtoMessage()    {}
 func (*ListResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{9}
+	return fileDescriptor_41af05d40a615591, []int{9}
 }
 
 func (m *ListResponse) XXX_Unmarshal(b []byte) error {
@@ -525,7 +552,7 @@ func (m *WatchRequest) Reset()         { *m = WatchRequest{} }
 func (m *WatchRequest) String() string { return proto.CompactTextString(m) }
 func (*WatchRequest) ProtoMessage()    {}
 func (*WatchRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f287a6b809166ad2, []int{10}
+	return fileDescriptor_41af05d40a615591, []int{10}
 }
 
 func (m *WatchRequest) XXX_Unmarshal(b []byte) error {
@@ -553,7 +580,76 @@ func (m *WatchRequest) GetService() string {
 	return ""
 }
 
+// Event is registry event
+type Event struct {
+	// Event Id
+	Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	// type of event
+	Type EventType `protobuf:"varint,2,opt,name=type,proto3,enum=go.micro.registry.EventType" json:"type,omitempty"`
+	// unix timestamp of event
+	Timestamp int64 `protobuf:"varint,3,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	// service entry
+	Service              *Service `protobuf:"bytes,4,opt,name=service,proto3" json:"service,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Event) Reset()         { *m = Event{} }
+func (m *Event) String() string { return proto.CompactTextString(m) }
+func (*Event) ProtoMessage()    {}
+func (*Event) Descriptor() ([]byte, []int) {
+	return fileDescriptor_41af05d40a615591, []int{11}
+}
+
+func (m *Event) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Event.Unmarshal(m, b)
+}
+func (m *Event) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Event.Marshal(b, m, deterministic)
+}
+func (m *Event) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Event.Merge(m, src)
+}
+func (m *Event) XXX_Size() int {
+	return xxx_messageInfo_Event.Size(m)
+}
+func (m *Event) XXX_DiscardUnknown() {
+	xxx_messageInfo_Event.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Event proto.InternalMessageInfo
+
+func (m *Event) GetId() string {
+	if m != nil {
+		return m.Id
+	}
+	return ""
+}
+
+func (m *Event) GetType() EventType {
+	if m != nil {
+		return m.Type
+	}
+	return EventType_Create
+}
+
+func (m *Event) GetTimestamp() int64 {
+	if m != nil {
+		return m.Timestamp
+	}
+	return 0
+}
+
+func (m *Event) GetService() *Service {
+	if m != nil {
+		return m.Service
+	}
+	return nil
+}
+
 func init() {
+	proto.RegisterEnum("go.micro.registry.EventType", EventType_name, EventType_value)
 	proto.RegisterType((*Service)(nil), "go.micro.registry.Service")
 	proto.RegisterMapType((map[string]string)(nil), "go.micro.registry.Service.MetadataEntry")
 	proto.RegisterType((*Node)(nil), "go.micro.registry.Node")
@@ -568,281 +664,51 @@ func init() {
 	proto.RegisterType((*ListRequest)(nil), "go.micro.registry.ListRequest")
 	proto.RegisterType((*ListResponse)(nil), "go.micro.registry.ListResponse")
 	proto.RegisterType((*WatchRequest)(nil), "go.micro.registry.WatchRequest")
+	proto.RegisterType((*Event)(nil), "go.micro.registry.Event")
 }
 
-func init() {
+func init() { proto.RegisterFile("registry.proto", fileDescriptor_41af05d40a615591) }
-	proto.RegisterFile("micro/go-micro/registry/proto/registry.proto", fileDescriptor_f287a6b809166ad2)
-}
 
-var fileDescriptor_f287a6b809166ad2 = []byte{
+var fileDescriptor_41af05d40a615591 = []byte{
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-	0xb0, 0xce, 0xcb, 0xd6, 0x5c, 0xbc, 0x07, 0x8d, 0xfb, 0x1b, 0xc9, 0x13, 0xe8, 0xa8, 0xc8, 0xb1,
+	0xf1, 0x5d, 0x1f, 0x7f, 0x33, 0xa0, 0xe7, 0x2b, 0x3a, 0x3c, 0x95, 0x6e, 0x56, 0x3f, 0xdb, 0xd7,
-	0x0e, 0xbb, 0x3d, 0x0c, 0xef, 0x76, 0x0d, 0xa0, 0xbc, 0xfa, 0x7e, 0xeb, 0xd0, 0xfa, 0xdc, 0x55,
+	0x6b, 0x2e, 0x5c, 0x99, 0x6d, 0xdf, 0x68, 0x3a, 0x56, 0xab, 0xd1, 0xc2, 0x97, 0x15, 0x35, 0x31,
-	0x7f, 0x41, 0x4f, 0x7f, 0x07, 0x00, 0x00, 0xff, 0xff, 0x6b, 0x0b, 0x12, 0xd6, 0xb2, 0x06, 0x00,
+	0xdc, 0xd2, 0xbd, 0x3d, 0xac, 0x13, 0xeb, 0xdc, 0x9a, 0xb5, 0xf0, 0x04, 0x60, 0x42, 0xec, 0x6f,
-	0x00,
+	0xb1, 0xbd, 0x2e, 0x17, 0x47, 0x95, 0x70, 0xac, 0x9b, 0x65, 0x6d, 0xd1, 0xec, 0x9b, 0x8d, 0xe7,
-}
+	0x4b, 0xca, 0x63, 0x30, 0xe5, 0x0e, 0x61, 0x1d, 0x76, 0x7d, 0xbb, 0xec, 0xab, 0x35, 0x80, 0xf2,
-
+	0x2d, 0x3b, 0xad, 0x43, 0xed, 0x63, 0x47, 0xfe, 0xa7, 0x3e, 0xf8, 0x15, 0x00, 0x00, 0xff, 0xff,
-// Reference imports to suppress errors if they are not otherwise used.
+	0x08, 0x0e, 0xe4, 0xae, 0x65, 0x07, 0x00, 0x00,
-var _ context.Context
-var _ grpc.ClientConn
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion4
-
-// RegistryClient is the client API for Registry service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type RegistryClient interface {
-	GetService(ctx context.Context, in *GetRequest, opts ...grpc.CallOption) (*GetResponse, error)
-	Register(ctx context.Context, in *Service, opts ...grpc.CallOption) (*EmptyResponse, error)
-	Deregister(ctx context.Context, in *Service, opts ...grpc.CallOption) (*EmptyResponse, error)
-	ListServices(ctx context.Context, in *ListRequest, opts ...grpc.CallOption) (*ListResponse, error)
-	Watch(ctx context.Context, in *WatchRequest, opts ...grpc.CallOption) (Registry_WatchClient, error)
-}
-
-type registryClient struct {
-	cc *grpc.ClientConn
-}
-
-func NewRegistryClient(cc *grpc.ClientConn) RegistryClient {
-	return &registryClient{cc}
-}
-
-func (c *registryClient) GetService(ctx context.Context, in *GetRequest, opts ...grpc.CallOption) (*GetResponse, error) {
-	out := new(GetResponse)
-	err := c.cc.Invoke(ctx, "/go.micro.registry.Registry/GetService", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *registryClient) Register(ctx context.Context, in *Service, opts ...grpc.CallOption) (*EmptyResponse, error) {
-	out := new(EmptyResponse)
-	err := c.cc.Invoke(ctx, "/go.micro.registry.Registry/Register", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *registryClient) Deregister(ctx context.Context, in *Service, opts ...grpc.CallOption) (*EmptyResponse, error) {
-	out := new(EmptyResponse)
-	err := c.cc.Invoke(ctx, "/go.micro.registry.Registry/Deregister", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *registryClient) ListServices(ctx context.Context, in *ListRequest, opts ...grpc.CallOption) (*ListResponse, error) {
-	out := new(ListResponse)
-	err := c.cc.Invoke(ctx, "/go.micro.registry.Registry/ListServices", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *registryClient) Watch(ctx context.Context, in *WatchRequest, opts ...grpc.CallOption) (Registry_WatchClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Registry_serviceDesc.Streams[0], "/go.micro.registry.Registry/Watch", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &registryWatchClient{stream}
-	if err := x.ClientStream.SendMsg(in); err != nil {
-		return nil, err
-	}
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
-	}
-	return x, nil
-}
-
-type Registry_WatchClient interface {
-	Recv() (*Result, error)
-	grpc.ClientStream
-}
-
-type registryWatchClient struct {
-	grpc.ClientStream
-}
-
-func (x *registryWatchClient) Recv() (*Result, error) {
-	m := new(Result)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// RegistryServer is the server API for Registry service.
-type RegistryServer interface {
-	GetService(context.Context, *GetRequest) (*GetResponse, error)
-	Register(context.Context, *Service) (*EmptyResponse, error)
-	Deregister(context.Context, *Service) (*EmptyResponse, error)
-	ListServices(context.Context, *ListRequest) (*ListResponse, error)
-	Watch(*WatchRequest, Registry_WatchServer) error
-}
-
-func RegisterRegistryServer(s *grpc.Server, srv RegistryServer) {
-	s.RegisterService(&_Registry_serviceDesc, srv)
-}
-
-func _Registry_GetService_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(RegistryServer).GetService(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/go.micro.registry.Registry/GetService",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(RegistryServer).GetService(ctx, req.(*GetRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Registry_Register_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(Service)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(RegistryServer).Register(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/go.micro.registry.Registry/Register",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(RegistryServer).Register(ctx, req.(*Service))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Registry_Deregister_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(Service)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(RegistryServer).Deregister(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/go.micro.registry.Registry/Deregister",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(RegistryServer).Deregister(ctx, req.(*Service))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Registry_ListServices_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ListRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(RegistryServer).ListServices(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/go.micro.registry.Registry/ListServices",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(RegistryServer).ListServices(ctx, req.(*ListRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Registry_Watch_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(WatchRequest)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(RegistryServer).Watch(m, &registryWatchServer{stream})
-}
-
-type Registry_WatchServer interface {
-	Send(*Result) error
-	grpc.ServerStream
-}
-
-type registryWatchServer struct {
-	grpc.ServerStream
-}
-
-func (x *registryWatchServer) Send(m *Result) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-var _Registry_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "go.micro.registry.Registry",
-	HandlerType: (*RegistryServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "GetService",
-			Handler:    _Registry_GetService_Handler,
-		},
-		{
-			MethodName: "Register",
-			Handler:    _Registry_Register_Handler,
-		},
-		{
-			MethodName: "Deregister",
-			Handler:    _Registry_Deregister_Handler,
-		},
-		{
-			MethodName: "ListServices",
-			Handler:    _Registry_ListServices_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "Watch",
-			Handler:       _Registry_Watch_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "micro/go-micro/registry/proto/registry.proto",
 }

registry/proto/registry.proto

@@ -71,3 +71,22 @@ message WatchRequest {
 	// service is optional
 	string service = 1;
 }
+
+// EventType defines the type of event
+enum EventType {
+        Create = 0;
+        Delete = 1;
+        Update = 2;
+}
+
+// Event is registry event
+message Event {
+        // Event Id
+        string id = 1;
+        // type of event
+        EventType type = 2;
+        // unix timestamp of event
+        int64 timestamp = 3;
+        // service entry
+        Service service = 4;
+}

registry/registry.go

@@ -5,6 +5,15 @@ import (
 	"errors"
 )
 
+var (
+	DefaultRegistry = NewRegistry()
+
+	// Not found error when GetService is called
+	ErrNotFound = errors.New("service not found")
+	// Watcher stopped error when watcher is stopped
+	ErrWatcherStopped = errors.New("watcher stopped")
+)
+
 // The registry provides an interface for service discovery
 // and an abstraction over varying implementations
 // {consul, etcd, zookeeper, ...}
@@ -25,15 +34,6 @@ type RegisterOption func(*RegisterOptions)
 
 type WatchOption func(*WatchOptions)
 
-var (
-	DefaultRegistry = NewRegistry()
-
-	// Not found error when GetService is called
-	ErrNotFound = errors.New("service not found")
-	// Watcher stopped error when watcher is stopped
-	ErrWatcherStopped = errors.New("watcher stopped")
-)
-
 // Register a service node. Additionally supply options such as TTL.
 func Register(s *Service, opts ...RegisterOption) error {
 	return DefaultRegistry.Register(s, opts...)

registry/watcher.go

@@ -1,5 +1,7 @@
 package registry
 
+import "time"
+
 // Watcher is an interface that returns updates
 // about services within the registry.
 type Watcher interface {
@@ -14,3 +16,41 @@ type Result struct {
 	Action  string
 	Service *Service
 }
+
+// EventType defines registry event type
+type EventType int
+
+const (
+	// Create is emitted when a new service is registered
+	Create EventType = iota
+	// Delete is emitted when an existing service is deregsitered
+	Delete
+	// Update is emitted when an existing servicec is updated
+	Update
+)
+
+// String returns human readable event type
+func (t EventType) String() string {
+	switch t {
+	case Create:
+		return "create"
+	case Delete:
+		return "delete"
+	case Update:
+		return "update"
+	default:
+		return "unknown"
+	}
+}
+
+// Event is registry event
+type Event struct {
+	// Id is registry id
+	Id string
+	// Type defines type of event
+	Type EventType
+	// Timestamp is event timestamp
+	Timestamp time.Time
+	// Service is registry service
+	Service *Service
+}