GRPC changes

single client and server connection
principle object from token

authmdl/jwtmdl/jwtmdl.go

 package jwtmdl
 
 import (
+	"fmt"
+	"strings"
 	"time"
 
 	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/errormdl"
@@ -103,3 +105,33 @@ func GenerateTokenWithJWTKey(loginID string, groups []string, clientIP string, m
 	}
 	return t, nil
 }
+
+//GeneratePricipleObjUsingToken GeneratePricipleObjUsingToken
+func GeneratePricipleObjUsingToken(tokenReq string, jwtKey string) (jwt.MapClaims, error) {
+	tokenArray := strings.Split(tokenReq, "Bearer")
+	if len(tokenArray) <= 1 {
+		return nil, errormdl.Wrap("Provided JWT token is nil or invalid ")
+	}
+	tokenFromRequest := strings.Trim(tokenArray[1], " ")
+	// get data i.e.Claims from token
+	token, err := jwt.Parse(tokenFromRequest, func(token *jwt.Token) (interface{}, error) {
+		// Don't forget to validate the alg is what you expect:
+		_, ok := token.Method.(*jwt.SigningMethodHMAC)
+		if !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+		return []byte(jwtKey), nil
+	})
+
+	if err != nil {
+		loggermdl.LogError("Error while parsing JWT Token: ", err)
+		return nil, err
+	}
+
+	claims, ok := token.Claims.(jwt.MapClaims)
+	if !errormdl.CheckBool1(ok) {
+		loggermdl.LogError("Error while parsing claims to MapClaims")
+		return nil, errormdl.Wrap("Error while getting claims")
+	}
+	return claims, nil
+}

generate.sh

+#!/bin/bash or zsh
+
+protoc grpcbuilder/grpcbuildermdl.proto --go_out=plugins=grpc:.
\ No newline at end of file

grpcbuildermdl/grpcbuildermdl.pb.go

+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: grpcbuildermdl/grpcbuildermdl.proto
+
+package grpcbuildermdl
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	math "math"
+)
+
+// 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.ProtoPackageIsVersion3 // please upgrade the proto package
+
+type GRPCMessage struct {
+	Name                 string   `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Data                 []byte   `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
+	IsRestricted         bool     `protobuf:"varint,3,opt,name=isRestricted,proto3" json:"isRestricted,omitempty"`
+	IsRoleBased          bool     `protobuf:"varint,4,opt,name=isRoleBased,proto3" json:"isRoleBased,omitempty"`
+	Token                string   `protobuf:"bytes,5,opt,name=token,proto3" json:"token,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GRPCMessage) Reset()         { *m = GRPCMessage{} }
+func (m *GRPCMessage) String() string { return proto.CompactTextString(m) }
+func (*GRPCMessage) ProtoMessage()    {}
+func (*GRPCMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e620ca3a5f127fa1, []int{0}
+}
+
+func (m *GRPCMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GRPCMessage.Unmarshal(m, b)
+}
+func (m *GRPCMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GRPCMessage.Marshal(b, m, deterministic)
+}
+func (m *GRPCMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GRPCMessage.Merge(m, src)
+}
+func (m *GRPCMessage) XXX_Size() int {
+	return xxx_messageInfo_GRPCMessage.Size(m)
+}
+func (m *GRPCMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_GRPCMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GRPCMessage proto.InternalMessageInfo
+
+func (m *GRPCMessage) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *GRPCMessage) GetData() []byte {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
+func (m *GRPCMessage) GetIsRestricted() bool {
+	if m != nil {
+		return m.IsRestricted
+	}
+	return false
+}
+
+func (m *GRPCMessage) GetIsRoleBased() bool {
+	if m != nil {
+		return m.IsRoleBased
+	}
+	return false
+}
+
+func (m *GRPCMessage) GetToken() string {
+	if m != nil {
+		return m.Token
+	}
+	return ""
+}
+
+type GRPCRequest struct {
+	GrpcMessage          *GRPCMessage `protobuf:"bytes,1,opt,name=grpcMessage,proto3" json:"grpcMessage,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *GRPCRequest) Reset()         { *m = GRPCRequest{} }
+func (m *GRPCRequest) String() string { return proto.CompactTextString(m) }
+func (*GRPCRequest) ProtoMessage()    {}
+func (*GRPCRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e620ca3a5f127fa1, []int{1}
+}
+
+func (m *GRPCRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GRPCRequest.Unmarshal(m, b)
+}
+func (m *GRPCRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GRPCRequest.Marshal(b, m, deterministic)
+}
+func (m *GRPCRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GRPCRequest.Merge(m, src)
+}
+func (m *GRPCRequest) XXX_Size() int {
+	return xxx_messageInfo_GRPCRequest.Size(m)
+}
+func (m *GRPCRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GRPCRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GRPCRequest proto.InternalMessageInfo
+
+func (m *GRPCRequest) GetGrpcMessage() *GRPCMessage {
+	if m != nil {
+		return m.GrpcMessage
+	}
+	return nil
+}
+
+type GRPCResponse struct {
+	Data                 string   `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GRPCResponse) Reset()         { *m = GRPCResponse{} }
+func (m *GRPCResponse) String() string { return proto.CompactTextString(m) }
+func (*GRPCResponse) ProtoMessage()    {}
+func (*GRPCResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e620ca3a5f127fa1, []int{2}
+}
+
+func (m *GRPCResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GRPCResponse.Unmarshal(m, b)
+}
+func (m *GRPCResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GRPCResponse.Marshal(b, m, deterministic)
+}
+func (m *GRPCResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GRPCResponse.Merge(m, src)
+}
+func (m *GRPCResponse) XXX_Size() int {
+	return xxx_messageInfo_GRPCResponse.Size(m)
+}
+func (m *GRPCResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GRPCResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GRPCResponse proto.InternalMessageInfo
+
+func (m *GRPCResponse) GetData() string {
+	if m != nil {
+		return m.Data
+	}
+	return ""
+}
+
+type GRPCByteResponse struct {
+	Data                 []byte   `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GRPCByteResponse) Reset()         { *m = GRPCByteResponse{} }
+func (m *GRPCByteResponse) String() string { return proto.CompactTextString(m) }
+func (*GRPCByteResponse) ProtoMessage()    {}
+func (*GRPCByteResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e620ca3a5f127fa1, []int{3}
+}
+
+func (m *GRPCByteResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GRPCByteResponse.Unmarshal(m, b)
+}
+func (m *GRPCByteResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GRPCByteResponse.Marshal(b, m, deterministic)
+}
+func (m *GRPCByteResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GRPCByteResponse.Merge(m, src)
+}
+func (m *GRPCByteResponse) XXX_Size() int {
+	return xxx_messageInfo_GRPCByteResponse.Size(m)
+}
+func (m *GRPCByteResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GRPCByteResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GRPCByteResponse proto.InternalMessageInfo
+
+func (m *GRPCByteResponse) GetData() []byte {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*GRPCMessage)(nil), "grpcbuildermdl.GRPCMessage")
+	proto.RegisterType((*GRPCRequest)(nil), "grpcbuildermdl.GRPCRequest")
+	proto.RegisterType((*GRPCResponse)(nil), "grpcbuildermdl.GRPCResponse")
+	proto.RegisterType((*GRPCByteResponse)(nil), "grpcbuildermdl.GRPCByteResponse")
+}
+
+func init() {
+	proto.RegisterFile("grpcbuildermdl/grpcbuildermdl.proto", fileDescriptor_e620ca3a5f127fa1)
+}
+
+var fileDescriptor_e620ca3a5f127fa1 = []byte{
+	// 288 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x52, 0xc1, 0x4a, 0xc3, 0x40,
+	0x10, 0x35, 0xda, 0x8a, 0x9d, 0x04, 0x29, 0x83, 0x87, 0xa0, 0x1e, 0xc2, 0x0a, 0x92, 0x53, 0x85,
+	0x78, 0xf6, 0x92, 0x1e, 0xec, 0x41, 0x45, 0x56, 0xbc, 0x08, 0x1e, 0xb6, 0xd9, 0xa1, 0x86, 0xa6,
+	0x49, 0xdc, 0xdd, 0x0a, 0x7e, 0x86, 0x7f, 0x2c, 0xd9, 0x44, 0xdc, 0x94, 0xd0, 0xdb, 0xbc, 0x37,
+	0x8f, 0x37, 0xef, 0xb1, 0x0b, 0x57, 0x2b, 0x55, 0x67, 0xcb, 0x6d, 0x5e, 0x48, 0x52, 0x1b, 0x59,
+	0xdc, 0xf4, 0xe1, 0xac, 0x56, 0x95, 0xa9, 0xf0, 0xb4, 0xcf, 0xb2, 0x1f, 0x0f, 0xfc, 0x7b, 0xfe,
+	0x3c, 0x7f, 0x24, 0xad, 0xc5, 0x8a, 0x10, 0x61, 0x54, 0x8a, 0x0d, 0x85, 0x5e, 0xe4, 0xc5, 0x13,
+	0x6e, 0xe7, 0x86, 0x93, 0xc2, 0x88, 0xf0, 0x30, 0xf2, 0xe2, 0x80, 0xdb, 0x19, 0x19, 0x04, 0xb9,
+	0xe6, 0xa4, 0x8d, 0xca, 0x33, 0x43, 0x32, 0x3c, 0x8a, 0xbc, 0xf8, 0x84, 0xf7, 0x38, 0x8c, 0xc0,
+	0xcf, 0x35, 0xaf, 0x0a, 0x4a, 0x85, 0x26, 0x19, 0x8e, 0xac, 0xc4, 0xa5, 0xf0, 0x0c, 0xc6, 0xa6,
+	0x5a, 0x53, 0x19, 0x8e, 0xed, 0xb9, 0x16, 0xb0, 0x87, 0x36, 0x12, 0xa7, 0xcf, 0x2d, 0x69, 0x83,
+	0x77, 0xe0, 0x37, 0xa1, 0xbb, 0x84, 0x36, 0x99, 0x9f, 0x5c, 0xcc, 0x76, 0xea, 0x39, 0x25, 0xb8,
+	0xab, 0x67, 0x0c, 0x82, 0xd6, 0x4d, 0xd7, 0x55, 0xa9, 0xff, 0xdb, 0x74, 0x0d, 0x9b, 0x99, 0x5d,
+	0xc3, 0xb4, 0xd1, 0xa4, 0xdf, 0x86, 0x06, 0x75, 0x5d, 0xeb, 0xe4, 0xbd, 0x4d, 0xf6, 0x42, 0xea,
+	0x2b, 0xcf, 0x08, 0x9f, 0x5a, 0xb8, 0x10, 0xa5, 0x2c, 0x48, 0xe1, 0x60, 0xa6, 0xae, 0xc5, 0x79,
+	0x34, 0xb4, 0x74, 0x0f, 0xb2, 0x83, 0xe4, 0x15, 0x26, 0x0d, 0x3b, 0xff, 0xa0, 0x6c, 0x8d, 0x0b,
+	0x17, 0xec, 0xb5, 0xbe, 0x1c, 0x5e, 0xfe, 0xd9, 0xa6, 0xd3, 0xb7, 0x9d, 0x57, 0x5f, 0x1e, 0xdb,
+	0xcf, 0x70, 0xfb, 0x1b, 0x00, 0x00, 0xff, 0xff, 0x59, 0x6b, 0xff, 0x89, 0x33, 0x02, 0x00, 0x00,
+}
+
+// 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
+
+// GRPCServiceClient is the client API for GRPCService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type GRPCServiceClient interface {
+	GRPCHandler(ctx context.Context, in *GRPCRequest, opts ...grpc.CallOption) (*GRPCByteResponse, error)
+}
+
+type gRPCServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewGRPCServiceClient(cc *grpc.ClientConn) GRPCServiceClient {
+	return &gRPCServiceClient{cc}
+}
+
+func (c *gRPCServiceClient) GRPCHandler(ctx context.Context, in *GRPCRequest, opts ...grpc.CallOption) (*GRPCByteResponse, error) {
+	out := new(GRPCByteResponse)
+	err := c.cc.Invoke(ctx, "/grpcbuildermdl.GRPCService/GRPCHandler", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// GRPCServiceServer is the server API for GRPCService service.
+type GRPCServiceServer interface {
+	GRPCHandler(context.Context, *GRPCRequest) (*GRPCByteResponse, error)
+}
+
+// UnimplementedGRPCServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedGRPCServiceServer struct {
+}
+
+func (*UnimplementedGRPCServiceServer) GRPCHandler(ctx context.Context, req *GRPCRequest) (*GRPCByteResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GRPCHandler not implemented")
+}
+
+func RegisterGRPCServiceServer(s *grpc.Server, srv GRPCServiceServer) {
+	s.RegisterService(&_GRPCService_serviceDesc, srv)
+}
+
+func _GRPCService_GRPCHandler_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GRPCRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GRPCServiceServer).GRPCHandler(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpcbuildermdl.GRPCService/GRPCHandler",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GRPCServiceServer).GRPCHandler(ctx, req.(*GRPCRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _GRPCService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpcbuildermdl.GRPCService",
+	HandlerType: (*GRPCServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GRPCHandler",
+			Handler:    _GRPCService_GRPCHandler_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "grpcbuildermdl/grpcbuildermdl.proto",
+}
+
+// GRPCCheckClient is the client API for GRPCCheck service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type GRPCCheckClient interface {
+	GRPCCheck(ctx context.Context, in *GRPCRequest, opts ...grpc.CallOption) (*GRPCResponse, error)
+}
+
+type gRPCCheckClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewGRPCCheckClient(cc *grpc.ClientConn) GRPCCheckClient {
+	return &gRPCCheckClient{cc}
+}
+
+func (c *gRPCCheckClient) GRPCCheck(ctx context.Context, in *GRPCRequest, opts ...grpc.CallOption) (*GRPCResponse, error) {
+	out := new(GRPCResponse)
+	err := c.cc.Invoke(ctx, "/grpcbuildermdl.GRPCCheck/GRPCCheck", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// GRPCCheckServer is the server API for GRPCCheck service.
+type GRPCCheckServer interface {
+	GRPCCheck(context.Context, *GRPCRequest) (*GRPCResponse, error)
+}
+
+// UnimplementedGRPCCheckServer can be embedded to have forward compatible implementations.
+type UnimplementedGRPCCheckServer struct {
+}
+
+func (*UnimplementedGRPCCheckServer) GRPCCheck(ctx context.Context, req *GRPCRequest) (*GRPCResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GRPCCheck not implemented")
+}
+
+func RegisterGRPCCheckServer(s *grpc.Server, srv GRPCCheckServer) {
+	s.RegisterService(&_GRPCCheck_serviceDesc, srv)
+}
+
+func _GRPCCheck_GRPCCheck_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GRPCRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GRPCCheckServer).GRPCCheck(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpcbuildermdl.GRPCCheck/GRPCCheck",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GRPCCheckServer).GRPCCheck(ctx, req.(*GRPCRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _GRPCCheck_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpcbuildermdl.GRPCCheck",
+	HandlerType: (*GRPCCheckServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GRPCCheck",
+			Handler:    _GRPCCheck_GRPCCheck_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "grpcbuildermdl/grpcbuildermdl.proto",
+}

grpcbuildermdl/grpcbuildermdl.proto

+syntax = "proto3";
+
+package grpcbuildermdl;
+option go_package = "grpcbuildermdl";
+
+message GRPCMessage {
+    string name =1 ;
+    bytes data =2;
+    bool isRestricted = 3 ;
+    bool isRoleBased = 4;
+    string token = 5;
+}
+
+
+
+
+message GRPCRequest {
+    GRPCMessage grpcMessage = 1;
+}
+
+message GRPCResponse {
+    string data = 1;
+}
+
+message GRPCByteResponse {
+    bytes data = 1;
+}
+
+service GRPCService {
+    rpc GRPCHandler(GRPCRequest) returns (GRPCByteResponse) {};
+}
+
+service GRPCCheck {
+    rpc GRPCCheck(GRPCRequest) returns (GRPCResponse) { };
+}
\ No newline at end of file

grpcclientmdl/grpcclientmdl.go

+package grpcclientmdl
+
+import (
+	"context"
+	"time"
+
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/grpcbuildermdl"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/loggermdl"
+	"github.com/processout/grpc-go-pool"
+	"google.golang.org/grpc"
+)
+
+// type GRPCHost struct {
+// 	Host string `json:"host"`
+// 	Port string `json:"port"`
+// }
+
+// var clientConns map[string]*grpc.ClientConn
+// var mutex sync.Mutex
+// var once sync.Once
+
+// // GetGRPCClientConnection GetGRPCClientConnection
+// func GetGRPCClientConnection(hostName string) (*grpc.ClientConn, error) {
+// 	defer mutex.Unlock()
+// 	mutex.Lock()
+// 	if clientConns == nil {
+// 		return nil, errormdl.Wrap("GRPC_NOT_DONE")
+// 	}
+// 	if hostName == "" {
+// 		if instance, ok := clientConns[hostName]; ok {
+// 			return instance, nil
+// 		}
+// 	}
+// 	if instance, ok := clientConns[hostName]; ok {
+// 		return instance, nil
+// 	}
+// 	return nil, errormdl.Wrap("GRPC not found for instance: " + hostName)
+// }
+
+// TotalCheck TotalCheck
+func TotalCheck() (string, error) {
+	// TODO: review
+	conn, err := grpc.Dial("0.0.0.0:50051", grpc.WithInsecure())
+	if err != nil {
+		loggermdl.LogError("Could not connect: ", err)
+	}
+	defer conn.Close()
+	c := grpcbuildermdl.NewGRPCCheckClient(conn)
+
+	req := &grpcbuildermdl.GRPCRequest{}
+	res, err := c.GRPCCheck(context.Background(), req)
+
+	return res.GetData(), nil
+}
+
+type Employee struct {
+	Name   string `json:"empname"`
+	Number int    `json:"empid"`
+}
+
+var instances map[string]*grpcpool.Pool
+
+// Init init
+func Init() {
+	instances = make(map[string]*grpcpool.Pool)
+	var factory grpcpool.Factory
+	factory = func() (*grpc.ClientConn, error) {
+		conn, err := grpc.Dial("0.0.0.0:50051", grpc.WithInsecure())
+		if err != nil {
+			loggermdl.LogError("Failed to start gRPC connection: %v", err)
+		}
+		loggermdl.LogInfo("Connected to server")
+		return conn, err
+	}
+
+	pool, err := grpcpool.New(factory, 5, 5, time.Second)
+
+	if err != nil {
+		loggermdl.LogError("Failed to create gRPC pool: %v", err)
+	}
+	instances["0.0.0.0:50051"] = pool
+}
+
+//ByteHandler ByteHandler
+func ByteHandler(req *grpcbuildermdl.GRPCRequest) ([]byte, error) {
+
+	conn, err := instances["0.0.0.0:50051"].Get(context.Background())
+	if err != nil {
+		loggermdl.LogError("Failed to create gRPC pool: %v", err)
+	}
+	client := grpcbuildermdl.NewGRPCServiceClient(conn.ClientConn)
+
+	res, err := client.GRPCHandler(context.Background(), req)
+	// var emp Employee
+	// json.Unmarshal(res.GetData(), emp)
+	// loggermdl.LogInfo("<ByteHandler>", res)
+	return res.GetData(), nil
+}

routebuildermdl/grpcservermdl.go

+package routebuildermdl
+
+import (
+	"context"
+	"encoding/json"
+	"net"
+
+	"google.golang.org/grpc"
+
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/authmdl/jwtmdl"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/authmdl/roleenforcemdl"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/errormdl"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/grpcbuildermdl"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/loggermdl"
+	"corelab.mkcl.org/MKCLOS/coredevelopmentplatform/corepkgv2/servicebuildermdl"
+)
+
+// Server server
+type Server struct{}
+
+// GRPCInit init
+func GRPCInit() {
+	loggermdl.LogInfo("GRPC init called")
+
+	list, err := net.Listen("tcp", "0.0.0.0:50051")
+	if err != nil {
+		// log.Fatal("fail to listen: %v", err)
+		loggermdl.LogError("GRPC listening failed: %v", err)
+
+	}
+	s := grpc.NewServer()
+	grpcbuildermdl.RegisterGRPCCheckServer(s, &Server{})
+	grpcbuildermdl.RegisterGRPCServiceServer(s, &Server{})
+	if err := s.Serve(list); err != nil {
+		// log.Fatal("Unable to start: %v", err)
+		loggermdl.LogError("Unable to start GRPC server: %v", err)
+	}
+}
+
+type Employee struct {
+	Name   string `json:"empname"`
+	Number int    `json:"empid"`
+}
+
+// GRPCHandler GRPCHandler
+func (*Server) GRPCHandler(ctx context.Context, req *grpcbuildermdl.GRPCRequest) (*grpcbuildermdl.GRPCByteResponse, error) {
+	loggermdl.LogInfo("GRPC Handler inoked: ", req)
+	//emp := &Employee{Name: "Rocky", Number: 5454}
+	// e, _ := json.Marshal(emp)
+	// res := &grpcbuildermdl.GRPCByteResponse{
+	// 	Data: e,
+	// }
+	claim, _ := jwtmdl.GeneratePricipleObjUsingToken(req.GetGrpcMessage().GetToken(), jwtmdl.GlobalJWTKey)
+	principal := servicebuildermdl.Principal{}
+	groups, grperr := roleenforcemdl.GetGroupNames(claim, "groups")
+	if errormdl.CheckErr(grperr) != nil {
+		loggermdl.LogError(grperr)
+		// return principal, errormdl.CheckErr(grperr)
+	}
+	userID, ok := claim["userId"].(string)
+	if !ok || len(userID) < 2 {
+		loggermdl.LogError("Unable to parse UserID from JWT Token")
+		//return principal, errormdl.Wrap("Unable to parse UserID from JWT Token")
+	}
+	rawMetadata, ok := claim["metadata"]
+	if ok {
+		loggermdl.LogError(rawMetadata)
+		metadata, ok := rawMetadata.(string)
+		if !ok {
+			loggermdl.LogError("Unable to parse metadata from JWT Token")
+			//	return principal, errormdl.Wrap("Unable to parse metadata from JWT Token")
+		}
+		principal.Metadata = metadata
+	}
+	principal.Groups = groups
+	principal.UserID = userID
+	principal.Token = req.GetGrpcMessage().GetToken()
+	loggermdl.LogInfo("<Request Message>", req)
+	loggermdl.LogInfo(
+		req.GetGrpcMessage().GetName(),
+		req.GetGrpcMessage().GetData(), req.GetGrpcMessage().GetIsRestricted(),
+		req.GetGrpcMessage().GetIsRoleBased(), false, principal)
+	result, nextDynamicPage, ab, isCompressed, errorCode, err := executeService(
+		req.GetGrpcMessage().GetName(),
+		req.GetGrpcMessage().GetData(), req.GetGrpcMessage().GetIsRestricted(),
+		req.GetGrpcMessage().GetIsRoleBased(), false, principal)
+	e, _ := json.Marshal(result)
+	res := &grpcbuildermdl.GRPCByteResponse{
+		Data: e,
+	}
+	loggermdl.LogInfo(result, nextDynamicPage, ab, isCompressed, errorCode, err)
+	return res, err
+}
+
+// GRPCCheck GRPCCheck
+func (*Server) GRPCCheck(ctx context.Context, req *grpcbuildermdl.GRPCRequest) (*grpcbuildermdl.GRPCResponse, error) {
+	loggermdl.LogInfo("GRPC Check Invoked: ", req)
+	claim, _ := jwtmdl.GeneratePricipleObjUsingToken(req.GetGrpcMessage().GetToken(), jwtmdl.GlobalJWTKey)
+	principal := servicebuildermdl.Principal{}
+	groups, grperr := roleenforcemdl.GetGroupNames(claim, "groups")
+	if errormdl.CheckErr(grperr) != nil {
+		loggermdl.LogError(grperr)
+		// return principal, errormdl.CheckErr(grperr)
+	}
+	userID, ok := claim["userId"].(string)
+	if !ok || len(userID) < 2 {
+		loggermdl.LogError("Unable to parse UserID from JWT Token")
+		//return principal, errormdl.Wrap("Unable to parse UserID from JWT Token")
+	}
+	rawMetadata, ok := claim["metadata"]
+	if ok {
+		loggermdl.LogError(rawMetadata)
+		metadata, ok := rawMetadata.(string)
+		if !ok {
+			loggermdl.LogError("Unable to parse metadata from JWT Token")
+			//	return principal, errormdl.Wrap("Unable to parse metadata from JWT Token")
+		}
+		principal.Metadata = metadata
+	}
+	principal.Groups = groups
+	principal.UserID = userID
+	principal.Token = req.GetGrpcMessage().GetToken()
+	result, nextDynamicPage, ab, isCompressed, errorCode, err := executeService(
+		req.GetGrpcMessage().GetName(),
+		req.GetGrpcMessage().GetData(), req.GetGrpcMessage().GetIsRestricted(),
+		req.GetGrpcMessage().GetIsRoleBased(), false, principal)
+	res := &grpcbuildermdl.GRPCResponse{
+		Data: "Response from GRPC Check service",
+	}
+	loggermdl.LogInfo(result, nextDynamicPage, ab, isCompressed, errorCode, err)
+	return res, err
+}

routebuildermdl/routebuildermdl.go

@@ -124,10 +124,12 @@ func (s ServiceCache) preHooksExec(rs *gjson.Result, principalObj *servicebuilde
 
 func (s ServiceCache) postHooksExec(data interface{}, principalObj *servicebuildermdl.Principal) {
 	rs := gjson.Result{}
-	objType := reflect.TypeOf(data).String()
-	if strings.Contains(objType, "map[string]") {
-		ba, _ := json.Marshal(data)
-		rs = gjson.ParseBytes(ba)
+	if data != nil {
+		objType := reflect.TypeOf(data).String()
+		if strings.Contains(objType, "map[string]") {
+			ba, _ := json.Marshal(data)
+			rs = gjson.ParseBytes(ba)
+		}
 	}
 	for i := 0; i < len(s.PostHooks); i++ {
 		var service interface{}