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#include "MetadataStorageFromStaticFilesWebServer.h"
#include <Disks/IDisk.h>
#include <Disks/ObjectStorages/StaticDirectoryIterator.h>
#include <Common/filesystemHelpers.h>
#include <Common/logger_useful.h>
#include <Common/escapeForFileName.h>
#include <IO/WriteHelpers.h>
namespace DB
{
namespace ErrorCodes
{
extern const int FILE_DOESNT_EXIST;
}
MetadataStorageFromStaticFilesWebServer::MetadataStorageFromStaticFilesWebServer(
const WebObjectStorage & object_storage_)
: object_storage(object_storage_)
{
}
MetadataTransactionPtr MetadataStorageFromStaticFilesWebServer::createTransaction()
{
return std::make_shared<MetadataStorageFromStaticFilesWebServerTransaction>(*this);
}
const std::string & MetadataStorageFromStaticFilesWebServer::getPath() const
{
return root_path;
}
bool MetadataStorageFromStaticFilesWebServer::exists(const std::string & path) const
{
return object_storage.exists(path);
}
void MetadataStorageFromStaticFilesWebServer::assertExists(const std::string & path) const
{
if (!exists(path))
#ifdef NDEBUG
throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "There is no path {}", path);
#else
{
std::string all_files;
std::shared_lock shared_lock(object_storage.metadata_mutex);
for (const auto & [file, _] : object_storage.files)
{
if (!all_files.empty())
all_files += ", ";
all_files += file;
}
throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "There is no path {} (available files: {})", path, all_files);
}
#endif
}
bool MetadataStorageFromStaticFilesWebServer::isFile(const std::string & path) const
{
assertExists(path);
std::shared_lock shared_lock(object_storage.metadata_mutex);
return object_storage.files.at(path).type == WebObjectStorage::FileType::File;
}
bool MetadataStorageFromStaticFilesWebServer::isDirectory(const std::string & path) const
{
assertExists(path);
std::shared_lock shared_lock(object_storage.metadata_mutex);
return object_storage.files.at(path).type == WebObjectStorage::FileType::Directory;
}
uint64_t MetadataStorageFromStaticFilesWebServer::getFileSize(const String & path) const
{
assertExists(path);
std::shared_lock shared_lock(object_storage.metadata_mutex);
return object_storage.files.at(path).size;
}
StoredObjects MetadataStorageFromStaticFilesWebServer::getStorageObjects(const std::string & path) const
{
assertExists(path);
auto fs_path = fs::path(object_storage.url) / path;
std::string remote_path = fs_path.parent_path() / (escapeForFileName(fs_path.stem()) + fs_path.extension().string());
remote_path = remote_path.substr(object_storage.url.size());
std::shared_lock shared_lock(object_storage.metadata_mutex);
return {StoredObject(remote_path, object_storage.files.at(path).size, path)};
}
std::vector<std::string> MetadataStorageFromStaticFilesWebServer::listDirectory(const std::string & path) const
{
std::vector<std::string> result;
std::shared_lock shared_lock(object_storage.metadata_mutex);
for (const auto & [file_path, _] : object_storage.files)
{
if (file_path.starts_with(path))
result.push_back(file_path);
}
return result;
}
DirectoryIteratorPtr MetadataStorageFromStaticFilesWebServer::iterateDirectory(const std::string & path) const
{
std::vector<fs::path> dir_file_paths;
if (!exists(path))
return std::make_unique<StaticDirectoryIterator>(std::move(dir_file_paths));
std::shared_lock shared_lock(object_storage.metadata_mutex);
for (const auto & [file_path, _] : object_storage.files)
{
if (fs::path(parentPath(file_path)) / "" == fs::path(path) / "")
dir_file_paths.emplace_back(file_path);
}
LOG_TRACE(object_storage.log, "Iterate directory {} with {} files", path, dir_file_paths.size());
return std::make_unique<StaticDirectoryIterator>(std::move(dir_file_paths));
}
const IMetadataStorage & MetadataStorageFromStaticFilesWebServerTransaction::getStorageForNonTransactionalReads() const
{
return metadata_storage;
}
void MetadataStorageFromStaticFilesWebServerTransaction::createDirectory(const std::string &)
{
/// Noop.
}
void MetadataStorageFromStaticFilesWebServerTransaction::createDirectoryRecursive(const std::string &)
{
/// Noop.
}
}
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