backend

type Backend interface {
	Load() (*meta.Meta, error)
	Save(meta *meta.Meta) error
	Clean() error
	Backup(meta *meta.Meta, backupFile string) error
	BackupV2(file string) error
	Restore(backupFile string) error
}

type BackupCodec struct{}

type BackupFile []byte

type BackupHeader struct {
	// Version number for backup format
	Version BackupHeaderVersion `protobuf:"varint,1,opt,name=version,proto3" json:"version,omitempty"`
	// instance name, as rootPath for key prefix
	Instance string `protobuf:"bytes,2,opt,name=instance,proto3" json:"instance,omitempty"`
	// MetaPath used in keys
	MetaPath string `protobuf:"bytes,3,opt,name=meta_path,proto3" json:"meta_path,omitempty"`
	// Entries record number of key-value in backup
	Entries int64 `protobuf:"varint,4,opt,name=entries,proto3" json:"entries,omitempty"`
	// Component is the backup target
	Component string `protobuf:"bytes,5,opt,name=component,proto3" json:"component,omitempty"`
	// Extra property reserved
	Extra []byte `protobuf:"bytes,6,opt,name=extra,proto3" json:"-"`
}

type BackupHeaderExtra struct {
	EntryIncludeRootPath bool `json:"entry_include_root_path"`
}

type BackupHeaderVersion int32