//
// +protobuf.options.(gogoproto.goproto_stringer)=false
message GroupKind {
  optional string group = 1;

  optional string kind = 2;
}

// GroupResource specifies a Group and a Resource, but does not force a version.  This is useful for identifying
// concepts during lookup stages without having partially valid types
//
// +protobuf.options.(gogoproto.goproto_stringer)=false
message GroupResource {

	return nil
}

//msgp:ignore batchJobMetrics
type batchJobMetrics struct {
	sync.RWMutex
	metrics map[string]*batchJobInfo
}

//msgp:ignore batchJobMetric
//go:generate stringer -type=batchJobMetric -trimprefix=batchJobMetric $GOFILE
type batchJobMetric uint8

const (
	batchJobMetricReplication batchJobMetric = iota
	batchJobMetricKeyRotation
	batchJobMetricExpire
)

var (
	// XL header specifies the format
	xlHeader = [4]byte{'X', 'L', '2', ' '}

	// Current version being written.
	xlVersionCurrent [4]byte
)

//go:generate msgp -file=$GOFILE -unexported
//go:generate stringer -type VersionType,ErasureAlgo -output=xl-storage-format-v2_string.go $GOFILE

const (
	// Breaking changes.
	// Newer versions cannot be read by older software.
	// This will prevent downgrades to incompatible versions.

	RequestID  string `xml:"RequestId" json:"RequestId"`
	HostID     string `xml:"HostId" json:"HostId"`
}

// APIErrorCode type of error status.
type APIErrorCode int

//go:generate stringer -type=APIErrorCode -trimprefix=Err $GOFILE

// Error codes, non exhaustive list - http://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
const (
	ErrNone APIErrorCode = iota
	ErrAccessDenied
	ErrBadDigest

	case osIsNotExist(err):
		err = errDiskNotFound
	case isSysErrTooLong(err):
		err = errFileNameTooLong
	case isSysErrIO(err):
		err = errFaultyDisk
	}

	return di, err
}

// Implements stringer compatible interface.
func (s *xlStorage) String() string {
	return s.drivePath
}

func (s *xlStorage) Hostname() string {
	return s.endpoint.Host
}

func (s *xlStorage) Endpoint() Endpoint {