#pragma once
#include
#include
namespace DB
{
class IDisk;
using DiskPtr = std::shared_ptr;
/// Stores the sizes of all columns, and can check whether the columns are corrupted.
class FileChecker
{
public:
FileChecker(const String & file_info_path_);
FileChecker(DiskPtr disk_, const String & file_info_path_);
void setPath(const String & file_info_path_);
String getPath() const;
void update(const String & full_file_path);
void setEmpty(const String & full_file_path);
void save() const;
bool empty() const { return map.empty(); }
/// Check the files whose parameters are specified in sizes.json
CheckResults check() const;
/// Truncate files that have excessive size to the expected size.
/// Throw exception if the file size is less than expected.
/// The purpose of this function is to rollback a group of unfinished writes.
void repair();
/// Returns stored file size.
size_t getFileSize(const String & full_file_path) const;
private:
void load();
bool fileReallyExists(const String & path_) const;
size_t getRealFileSize(const String & path_) const;
const DiskPtr disk;
const Poco::Logger * log = &Poco::Logger::get("FileChecker");
String files_info_path;
std::map map;
};
}