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#pragma once
#include <Common/SharedMutex.h>
#include <Disks/ObjectStorages/IMetadataStorage.h>
#include <numeric>
namespace DB
{
class MetadataStorageFromDisk;
class IDisk;
/**
* Implementations for transactional operations with metadata used by MetadataStorageFromDisk.
*/
struct IMetadataOperation
{
virtual void execute(std::unique_lock<SharedMutex> & metadata_lock) = 0;
virtual void undo() = 0;
virtual void finalize() {}
virtual ~IMetadataOperation() = default;
};
using MetadataOperationPtr = std::unique_ptr<IMetadataOperation>;
struct SetLastModifiedOperation final : public IMetadataOperation
{
SetLastModifiedOperation(const std::string & path_, Poco::Timestamp new_timestamp_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
Poco::Timestamp new_timestamp;
Poco::Timestamp old_timestamp;
IDisk & disk;
};
struct ChmodOperation final : public IMetadataOperation
{
ChmodOperation(const std::string & path_, mode_t mode_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
mode_t mode;
mode_t old_mode;
IDisk & disk;
};
struct UnlinkFileOperation final : public IMetadataOperation
{
UnlinkFileOperation(const std::string & path_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
IDisk & disk;
std::string prev_data;
};
struct CreateDirectoryOperation final : public IMetadataOperation
{
CreateDirectoryOperation(const std::string & path_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
IDisk & disk;
};
struct CreateDirectoryRecursiveOperation final : public IMetadataOperation
{
CreateDirectoryRecursiveOperation(const std::string & path_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
std::vector<std::string> paths_created;
IDisk & disk;
};
struct RemoveDirectoryOperation final : public IMetadataOperation
{
RemoveDirectoryOperation(const std::string & path_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
IDisk & disk;
};
struct RemoveRecursiveOperation final : public IMetadataOperation
{
RemoveRecursiveOperation(const std::string & path_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
void finalize() override;
private:
std::string path;
IDisk & disk;
std::string temp_path;
};
struct WriteFileOperation final : public IMetadataOperation
{
WriteFileOperation(const std::string & path_, IDisk & disk_, const std::string & data_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
IDisk & disk;
std::string data;
bool existed = false;
std::string prev_data;
};
struct CreateHardlinkOperation final : public IMetadataOperation
{
CreateHardlinkOperation(
const std::string & path_from_,
const std::string & path_to_,
IDisk & disk_,
const MetadataStorageFromDisk & metadata_storage_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path_from;
std::string path_to;
IDisk & disk;
std::unique_ptr<WriteFileOperation> write_operation;
const MetadataStorageFromDisk & metadata_storage;
};
struct MoveFileOperation final : public IMetadataOperation
{
MoveFileOperation(const std::string & path_from_, const std::string & path_to_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path_from;
std::string path_to;
IDisk & disk;
};
struct MoveDirectoryOperation final : public IMetadataOperation
{
MoveDirectoryOperation(const std::string & path_from_, const std::string & path_to_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path_from;
std::string path_to;
IDisk & disk;
};
struct ReplaceFileOperation final : public IMetadataOperation
{
ReplaceFileOperation(const std::string & path_from_, const std::string & path_to_, IDisk & disk_);
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
void finalize() override;
private:
std::string path_from;
std::string path_to;
IDisk & disk;
std::string temp_path_to;
};
struct AddBlobOperation final : public IMetadataOperation
{
AddBlobOperation(
const std::string & path_,
const std::string & blob_name_,
const std::string & root_path_,
uint64_t size_in_bytes_,
IDisk & disk_,
const MetadataStorageFromDisk & metadata_storage_)
: path(path_)
, blob_name(blob_name_)
, root_path(root_path_)
, size_in_bytes(size_in_bytes_)
, disk(disk_)
, metadata_storage(metadata_storage_)
{}
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
std::string blob_name;
std::string root_path;
uint64_t size_in_bytes;
IDisk & disk;
const MetadataStorageFromDisk & metadata_storage;
std::unique_ptr<WriteFileOperation> write_operation;
};
struct UnlinkMetadataFileOperation final : public IMetadataOperation
{
const UnlinkMetadataFileOperationOutcomePtr outcome = std::make_shared<UnlinkMetadataFileOperationOutcome>();
UnlinkMetadataFileOperation(
const std::string & path_,
IDisk & disk_,
const MetadataStorageFromDisk & metadata_storage_)
: path(path_)
, disk(disk_)
, metadata_storage(metadata_storage_)
{
}
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
IDisk & disk;
const MetadataStorageFromDisk & metadata_storage;
std::unique_ptr<WriteFileOperation> write_operation;
std::unique_ptr<UnlinkFileOperation> unlink_operation;
};
struct SetReadonlyFileOperation final : public IMetadataOperation
{
SetReadonlyFileOperation(
const std::string & path_,
IDisk & disk_,
const MetadataStorageFromDisk & metadata_storage_)
: path(path_)
, disk(disk_)
, metadata_storage(metadata_storage_)
{
}
void execute(std::unique_lock<SharedMutex> & metadata_lock) override;
void undo() override;
private:
std::string path;
IDisk & disk;
const MetadataStorageFromDisk & metadata_storage;
std::unique_ptr<WriteFileOperation> write_operation;
};
}
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