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#pragma once
#include <Backups/IBackupEntry.h>
#include <mutex>
namespace DB
{
/// Helper class designed to generate multiple backup entries from one source.
class IBackupEntriesLazyBatch : public std::enable_shared_from_this<IBackupEntriesLazyBatch>
{
public:
BackupEntries getBackupEntries();
virtual ~IBackupEntriesLazyBatch();
protected:
virtual size_t getSize() const = 0;
virtual const String & getName(size_t i) const = 0;
virtual BackupEntries generate() = 0;
private:
void generateIfNecessary();
class BackupEntryFromBatch;
std::mutex mutex;
BackupEntries entries;
bool generated = false;
};
}
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