pass micro errors from grpc server to grpc client (#1167)

* pass micro errors from grpc server to grpc client

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

* wrap micro errors.Error to grpc status

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

errors/errors.go

@@ -8,13 +8,7 @@ import (
 	"net/http"
 )
 
-// Error implements the error interface.
-type Error struct {
-	Id     string `json:"id"`
-	Code   int32  `json:"code"`
-	Detail string `json:"detail"`
-	Status string `json:"status"`
-}
+//go:generate protoc -I. --go_out=paths=source_relative:. errors.proto
 
 func (e *Error) Error() string {
 	b, _ := json.Marshal(e)

errors/errors.pb.go

@@ -0,0 +1,102 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: errors.proto
+
+package errors
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	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 Error struct {
+	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Code                 int32    `protobuf:"varint,2,opt,name=code,proto3" json:"code,omitempty"`
+	Detail               string   `protobuf:"bytes,3,opt,name=detail,proto3" json:"detail,omitempty"`
+	Status               string   `protobuf:"bytes,4,opt,name=status,proto3" json:"status,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Error) Reset()         { *m = Error{} }
+func (m *Error) String() string { return proto.CompactTextString(m) }
+func (*Error) ProtoMessage()    {}
+func (*Error) Descriptor() ([]byte, []int) {
+	return fileDescriptor_24fe73c7f0ddb19c, []int{0}
+}
+
+func (m *Error) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Error.Unmarshal(m, b)
+}
+func (m *Error) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Error.Marshal(b, m, deterministic)
+}
+func (m *Error) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Error.Merge(m, src)
+}
+func (m *Error) XXX_Size() int {
+	return xxx_messageInfo_Error.Size(m)
+}
+func (m *Error) XXX_DiscardUnknown() {
+	xxx_messageInfo_Error.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Error proto.InternalMessageInfo
+
+func (m *Error) GetId() string {
+	if m != nil {
+		return m.Id
+	}
+	return ""
+}
+
+func (m *Error) GetCode() int32 {
+	if m != nil {
+		return m.Code
+	}
+	return 0
+}
+
+func (m *Error) GetDetail() string {
+	if m != nil {
+		return m.Detail
+	}
+	return ""
+}
+
+func (m *Error) GetStatus() string {
+	if m != nil {
+		return m.Status
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*Error)(nil), "errors.Error")
+}
+
+func init() { proto.RegisterFile("errors.proto", fileDescriptor_24fe73c7f0ddb19c) }
+
+var fileDescriptor_24fe73c7f0ddb19c = []byte{
+	// 116 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x49, 0x2d, 0x2a, 0xca,
+	0x2f, 0x2a, 0xd6, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x83, 0xf0, 0x94, 0xa2, 0xb9, 0x58,
+	0x5d, 0x41, 0x2c, 0x21, 0x3e, 0x2e, 0xa6, 0xcc, 0x14, 0x09, 0x46, 0x05, 0x46, 0x0d, 0xce, 0x20,
+	0xa6, 0xcc, 0x14, 0x21, 0x21, 0x2e, 0x96, 0xe4, 0xfc, 0x94, 0x54, 0x09, 0x26, 0x05, 0x46, 0x0d,
+	0xd6, 0x20, 0x30, 0x5b, 0x48, 0x8c, 0x8b, 0x2d, 0x25, 0xb5, 0x24, 0x31, 0x33, 0x47, 0x82, 0x19,
+	0xac, 0x0e, 0xca, 0x03, 0x89, 0x17, 0x97, 0x24, 0x96, 0x94, 0x16, 0x4b, 0xb0, 0x40, 0xc4, 0x21,
+	0xbc, 0x24, 0x36, 0xb0, 0x5d, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0xef, 0xe7, 0x5d, 0xd3,
+	0x7b, 0x00, 0x00, 0x00,
+}

errors/errors.proto

@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+package errors;
+
+message Error {
+  string id = 1;
+  int32 code = 2;
+  string detail = 3;
+  string status = 4;
+};