command handler for stats

app/stats/command/command.go

@@ -0,0 +1,51 @@
+package command
+
+//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg command -path App,Stats,Command
+
+import (
+	"context"
+
+	grpc "google.golang.org/grpc"
+	"v2ray.com/core"
+	"v2ray.com/core/common"
+)
+
+type statsServer struct {
+	stats core.StatManager
+}
+
+func (s *statsServer) GetStats(ctx context.Context, request *GetStatsRequest) (*GetStatsResponse, error) {
+	c := s.stats.GetCounter(request.Name)
+	if c == nil {
+		return nil, newError(request.Name, " not found.")
+	}
+	var value int64
+	if request.Reset_ {
+		value = c.Set(0)
+	} else {
+		value = c.Value()
+	}
+	return &GetStatsResponse{
+		Stat: &Stat{
+			Name:  request.Name,
+			Value: value,
+		},
+	}, nil
+}
+
+type service struct {
+	v *core.Instance
+}
+
+func (s *service) Register(server *grpc.Server) {
+	RegisterStatsServiceServer(server, &statsServer{
+		stats: s.v.Stats(),
+	})
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, cfg interface{}) (interface{}, error) {
+		s := core.MustFromContext(ctx)
+		return &service{v: s}, nil
+	}))
+}

app/stats/command/command.pb.go

@@ -0,0 +1,198 @@
+package command
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	"context"
+
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type GetStatsRequest struct {
+	// Name of the stat counter.
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// Whether or not to reset the counter to fetching its value.
+	Reset_ bool `protobuf:"varint,2,opt,name=reset" json:"reset,omitempty"`
+}
+
+func (m *GetStatsRequest) Reset()                    { *m = GetStatsRequest{} }
+func (m *GetStatsRequest) String() string            { return proto.CompactTextString(m) }
+func (*GetStatsRequest) ProtoMessage()               {}
+func (*GetStatsRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *GetStatsRequest) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *GetStatsRequest) GetReset_() bool {
+	if m != nil {
+		return m.Reset_
+	}
+	return false
+}
+
+type Stat struct {
+	Name  string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Value int64  `protobuf:"varint,2,opt,name=value" json:"value,omitempty"`
+}
+
+func (m *Stat) Reset()                    { *m = Stat{} }
+func (m *Stat) String() string            { return proto.CompactTextString(m) }
+func (*Stat) ProtoMessage()               {}
+func (*Stat) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *Stat) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *Stat) GetValue() int64 {
+	if m != nil {
+		return m.Value
+	}
+	return 0
+}
+
+type GetStatsResponse struct {
+	Stat *Stat `protobuf:"bytes,1,opt,name=stat" json:"stat,omitempty"`
+}
+
+func (m *GetStatsResponse) Reset()                    { *m = GetStatsResponse{} }
+func (m *GetStatsResponse) String() string            { return proto.CompactTextString(m) }
+func (*GetStatsResponse) ProtoMessage()               {}
+func (*GetStatsResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func (m *GetStatsResponse) GetStat() *Stat {
+	if m != nil {
+		return m.Stat
+	}
+	return nil
+}
+
+type Config struct {
+}
+
+func (m *Config) Reset()                    { *m = Config{} }
+func (m *Config) String() string            { return proto.CompactTextString(m) }
+func (*Config) ProtoMessage()               {}
+func (*Config) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func init() {
+	proto.RegisterType((*GetStatsRequest)(nil), "v2ray.core.app.stats.command.GetStatsRequest")
+	proto.RegisterType((*Stat)(nil), "v2ray.core.app.stats.command.Stat")
+	proto.RegisterType((*GetStatsResponse)(nil), "v2ray.core.app.stats.command.GetStatsResponse")
+	proto.RegisterType((*Config)(nil), "v2ray.core.app.stats.command.Config")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+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
+
+// Client API for StatsService service
+
+type StatsServiceClient interface {
+	GetStats(ctx context.Context, in *GetStatsRequest, opts ...grpc.CallOption) (*GetStatsResponse, error)
+}
+
+type statsServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewStatsServiceClient(cc *grpc.ClientConn) StatsServiceClient {
+	return &statsServiceClient{cc}
+}
+
+func (c *statsServiceClient) GetStats(ctx context.Context, in *GetStatsRequest, opts ...grpc.CallOption) (*GetStatsResponse, error) {
+	out := new(GetStatsResponse)
+	err := grpc.Invoke(ctx, "/v2ray.core.app.stats.command.StatsService/GetStats", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for StatsService service
+
+type StatsServiceServer interface {
+	GetStats(context.Context, *GetStatsRequest) (*GetStatsResponse, error)
+}
+
+func RegisterStatsServiceServer(s *grpc.Server, srv StatsServiceServer) {
+	s.RegisterService(&_StatsService_serviceDesc, srv)
+}
+
+func _StatsService_GetStats_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetStatsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(StatsServiceServer).GetStats(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/v2ray.core.app.stats.command.StatsService/GetStats",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(StatsServiceServer).GetStats(ctx, req.(*GetStatsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _StatsService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "v2ray.core.app.stats.command.StatsService",
+	HandlerType: (*StatsServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetStats",
+			Handler:    _StatsService_GetStats_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "v2ray.com/core/app/stats/command/command.proto",
+}
+
+func init() { proto.RegisterFile("v2ray.com/core/app/stats/command/command.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 267 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x91, 0x3f, 0x4b, 0x03, 0x31,
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+	0xe4, 0x04, 0x17, 0x27, 0xbd, 0x41, 0x10, 0x07, 0x49, 0xc1, 0xc1, 0x2d, 0xc6, 0xa7, 0x14, 0xcd,
+	0x25, 0x26, 0xe9, 0x41, 0xf1, 0x1b, 0xf9, 0x29, 0x25, 0xb9, 0x1e, 0x82, 0xe0, 0xe1, 0x94, 0xf7,
+	0x92, 0xdf, 0xef, 0xfd, 0x21, 0x80, 0x6d, 0xe5, 0xe4, 0x1a, 0x95, 0xd1, 0xa5, 0x32, 0x8e, 0x4a,
+	0x69, 0x6d, 0xe9, 0x83, 0x0c, 0xbe, 0x54, 0x46, 0x6b, 0xd9, 0x3c, 0xf7, 0x27, 0x5a, 0x67, 0x82,
+	0x61, 0xb3, 0x9e, 0x77, 0x84, 0xd2, 0x5a, 0x4c, 0x2c, 0x6e, 0x18, 0x7e, 0x09, 0x87, 0x37, 0x14,
+	0x16, 0xf1, 0x4e, 0xd0, 0xc7, 0x8a, 0x7c, 0x60, 0x0c, 0xc6, 0x8d, 0xd4, 0x34, 0xcd, 0x8a, 0x6c,
+	0xbe, 0x27, 0x52, 0xcc, 0x8e, 0x61, 0xc7, 0x91, 0xa7, 0x30, 0x1d, 0x15, 0xd9, 0x3c, 0x17, 0x5d,
+	0xc2, 0xcf, 0x60, 0x1c, 0xcd, 0xbf, 0x8c, 0x56, 0xbe, 0xaf, 0x28, 0x19, 0xdb, 0xa2, 0x4b, 0xf8,
+	0x2d, 0x1c, 0xfd, 0xb4, 0xf3, 0xd6, 0x34, 0x9e, 0xd8, 0x05, 0x8c, 0xe3, 0x4c, 0xc9, 0xde, 0xaf,
+	0x38, 0x0e, 0xcd, 0x8b, 0x51, 0x15, 0x89, 0xe7, 0x39, 0x4c, 0x6a, 0xd3, 0xbc, 0x2c, 0x5f, 0xab,
+	0x4f, 0x38, 0x48, 0x25, 0x17, 0xe4, 0xda, 0xa5, 0x22, 0xf6, 0x06, 0x79, 0xdf, 0x85, 0x9d, 0x0e,
+	0xd7, 0xfb, 0xb5, 0xfc, 0x09, 0xfe, 0x17, 0xef, 0x86, 0xe7, 0x5b, 0xd7, 0x77, 0x50, 0x28, 0xa3,
+	0x07, 0xb5, 0xfb, 0xec, 0x71, 0x77, 0x13, 0x7e, 0x8d, 0x66, 0x0f, 0x95, 0x90, 0x6b, 0xac, 0x23,
+	0x79, 0x65, 0x6d, 0xda, 0xc8, 0x63, 0xdd, 0x3d, 0x3f, 0x4d, 0xd2, 0xa7, 0x9d, 0x7f, 0x07, 0x00,
+	0x00, 0xff, 0xff, 0x10, 0x3a, 0x8a, 0xf3, 0xe6, 0x01, 0x00, 0x00,
+}

app/stats/command/command.proto

@@ -0,0 +1,29 @@
+syntax = "proto3";
+
+package v2ray.core.app.stats.command;
+option csharp_namespace = "V2Ray.Core.App.Stats.Command";
+option go_package = "command";
+option java_package = "com.v2ray.core.app.stats.command";
+option java_multiple_files = true;
+
+message GetStatsRequest {
+  // Name of the stat counter.
+  string name = 1;
+  // Whether or not to reset the counter to fetching its value.
+  bool reset = 2;
+}
+
+message Stat {
+  string name = 1;
+  int64 value = 2;
+}
+
+message GetStatsResponse {
+  Stat stat = 1;
+}
+
+service StatsService {
+  rpc GetStats(GetStatsRequest) returns (GetStatsResponse) {}
+}
+
+message Config {}

app/stats/command/errors.generated.go

@@ -0,0 +1,7 @@
+package command
+
+import "v2ray.com/core/common/errors"
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).Path("App", "Stats", "Command")
+}

app/stats/stats.go

@@ -32,9 +32,18 @@ type Manager struct {
 }
 
 func NewManager(ctx context.Context, config *Config) (*Manager, error) {
-	return &Manager{
+	m := &Manager{
 		counters: make(map[string]*Counter),
-	}, nil
+	}
+
+	v := core.FromContext(ctx)
+	if v != nil {
+		if err := v.RegisterFeature((*core.StatManager)(nil), m); err != nil {
+			return nil, newError("failed to register StatManager").Base(err)
+		}
+	}
+
+	return m, nil
 }
 
 func (m *Manager) RegisterCounter(name string) (core.StatCounter, error) {
@@ -44,6 +53,7 @@ func (m *Manager) RegisterCounter(name string) (core.StatCounter, error) {
 	if _, found := m.counters[name]; found {
 		return nil, newError("Counter ", name, " already registered.")
 	}
+	newError("create new counter ", name).AtDebug().WriteToLog()
 	c := new(Counter)
 	m.counters[name] = c
 	return c, nil

main/distro/all/all.go

@@ -8,16 +8,18 @@ import (
 	_ "v2ray.com/core/app/proxyman/inbound"
 	_ "v2ray.com/core/app/proxyman/outbound"
 
-	// Default commander and all its services.
+	// Default commander and all its services. This is an optional feature.
 	_ "v2ray.com/core/app/commander"
 	_ "v2ray.com/core/app/log/command"
 	_ "v2ray.com/core/app/proxyman/command"
+	_ "v2ray.com/core/app/stats/command"
 
 	// Other optional features.
 	_ "v2ray.com/core/app/dns"
 	_ "v2ray.com/core/app/log"
 	_ "v2ray.com/core/app/policy"
 	_ "v2ray.com/core/app/router"
+	_ "v2ray.com/core/app/stats"
 
 	// Inbound and outbound proxies.
 	_ "v2ray.com/core/proxy/blackhole"

stats.go

@@ -27,7 +27,7 @@ func (s *syncStatManager) Start() error {
 	defer s.RUnlock()
 
 	if s.StatManager == nil {
-		return newError("StatManager not set.")
+		return nil
 	}
 
 	return s.StatManager.Start()
@@ -38,7 +38,7 @@ func (s *syncStatManager) Close() error {
 	defer s.RUnlock()
 
 	if s.StatManager == nil {
-		return newError("StatManager not set.")
+		return nil
 	}
 	return s.StatManager.Close()
 }