2011-10-24 12:10:59 +00:00
|
|
|
#pragma once
|
|
|
|
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
|
|
|
|
#include <DB/IO/WriteBufferFromFileDescriptor.h>
|
|
|
|
|
|
|
|
|
|
|
|
namespace DB
|
|
|
|
{
|
|
|
|
|
|
|
|
/** Принимает имя файла. Самостоятельно открывает и закрывает файл.
|
|
|
|
*/
|
|
|
|
class WriteBufferFromFile : public WriteBufferFromFileDescriptor
|
|
|
|
{
|
|
|
|
private:
|
|
|
|
std::string file_name;
|
|
|
|
|
|
|
|
public:
|
|
|
|
WriteBufferFromFile(const std::string & file_name_, int flags = -1, mode_t mode = 0666) : WriteBufferFromFileDescriptor(-1), file_name(file_name_)
|
|
|
|
{
|
|
|
|
fd = open(file_name.c_str(), flags == -1 ? O_WRONLY | O_APPEND | O_CREAT : flags, mode);
|
|
|
|
|
|
|
|
if (-1 == fd)
|
|
|
|
throwFromErrno("Cannot open file " + file_name, ErrorCodes::CANNOT_OPEN_FILE);
|
|
|
|
}
|
|
|
|
|
|
|
|
virtual ~WriteBufferFromFile()
|
|
|
|
{
|
2011-12-12 00:38:01 +00:00
|
|
|
bool uncaught_exception = std::uncaught_exception();
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
|
|
|
next();
|
|
|
|
if (0 != close(fd))
|
|
|
|
throwFromErrno("Cannot close file " + file_name, ErrorCodes::CANNOT_CLOSE_FILE);
|
|
|
|
}
|
|
|
|
catch (...)
|
|
|
|
{
|
|
|
|
/// Если до этого уже было какое-то исключение, то второе исключение проигнорируем.
|
|
|
|
if (!uncaught_exception)
|
|
|
|
throw;
|
|
|
|
}
|
2011-10-24 12:10:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
virtual std::string getFileName()
|
|
|
|
{
|
|
|
|
return file_name;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
}
|