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// --------------------------------------------------------------------------
//
// File
// Name: RaidFileRead.h
// Purpose: Read Raid like Files
// Created: 2003/07/13
//
// --------------------------------------------------------------------------
#ifndef RAIDFILEREAD__H
#define RAIDFILEREAD__H
#include <cstring>
#include <cstdlib>
#include <memory>
#include <vector>
#include "IOStream.h"
#include "Logging.h"
class RaidFileDiscSet;
class RaidFileReadCategory : public Log::Category
{
public:
RaidFileReadCategory(const std::string& name)
: Log::Category(std::string("RaidFileRead/") + name)
{ }
};
// --------------------------------------------------------------------------
//
// Class
// Name: RaidFileRead
// Purpose: Read RAID like files
// Created: 2003/07/13
//
// --------------------------------------------------------------------------
class RaidFileRead : public IOStream
{
protected:
RaidFileRead(int SetNumber, const std::string &Filename);
public:
virtual ~RaidFileRead();
private:
RaidFileRead(const RaidFileRead &rToCopy);
public:
// Open a raid file
static std::auto_ptr<RaidFileRead> Open(int SetNumber, const std::string &Filename, int64_t *pRevisionID = 0, int BufferSizeHint = 4096);
// Extra info
virtual pos_type GetFileSize() const = 0;
// Utility functions
static bool FileExists(int SetNumber, const std::string &rFilename, int64_t *pRevisionID = 0);
static bool DirectoryExists(const RaidFileDiscSet &rSet, const std::string &rDirName);
static bool DirectoryExists(int SetNumber, const std::string &rDirName);
enum
{
DirReadType_FilesOnly = 0,
DirReadType_DirsOnly = 1
};
static bool ReadDirectoryContents(int SetNumber, const std::string &rDirName, int DirReadType, std::vector<std::string> &rOutput);
// Common IOStream interface implementation
virtual void Write(const void *pBuffer, int NBytes,
int Timeout = IOStream::TimeOutInfinite);
virtual bool StreamClosed();
virtual pos_type BytesLeftToRead();
pos_type GetDiscUsageInBlocks();
std::string ToString() const;
typedef int64_t FileSizeType;
static const RaidFileReadCategory OPEN_IN_RECOVERY;
static const RaidFileReadCategory IO_ERROR;
static const RaidFileReadCategory RECOVERING_IO_ERROR;
protected:
int mSetNumber;
std::string mFilename;
};
#endif // RAIDFILEREAD__H
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