source: box/trunk/lib/raidfile/RaidFileController.h @ 2498

// --------------------------------------------------------------------------
//
// File
//              Name:    RaidFileController.h
//              Purpose: Controls config and daemon comms for RaidFile classes
//              Created: 2003/07/08
//
// --------------------------------------------------------------------------

/*  NOTE: will log to local5: include a line like
        local5.info                                             /var/log/raidfile
        in /etc/syslog.conf
*/

#ifndef RAIDFILECONTROLLER__H
#define RAIDFILECONTROLLER__H

#include <string>
#include <vector>

// --------------------------------------------------------------------------
//
// Class
//              Name:    RaidFileDiscSet
//              Purpose: Describes a set of paritions for RAID like files.
//                               Use as list of directories containing the files.
//              Created: 2003/07/08
//
// --------------------------------------------------------------------------
class RaidFileDiscSet : public std::vector<std::string>
{
public:
        RaidFileDiscSet(int SetID, unsigned int BlockSize)
                : mSetID(SetID),
                  mBlockSize(BlockSize)
        {
        }
        RaidFileDiscSet(const RaidFileDiscSet &rToCopy)
                : std::vector<std::string>(rToCopy),
                  mSetID(rToCopy.mSetID),
                  mBlockSize(rToCopy.mBlockSize)
        {
        }
        
        ~RaidFileDiscSet()
        {
        }

        int GetSetID() const {return mSetID;}
        
        int GetSetNumForWriteFiles(const std::string &rFilename) const;
        
        unsigned int GetBlockSize() const {return mBlockSize;}

        // Is this disc set a non-RAID disc set? (ie files never get transformed to raid storage)
        bool IsNonRaidSet() const {return 1 == size();}

private:
        int mSetID;
        unsigned int mBlockSize;
};

class _RaidFileController;      // compiler warning avoidance

// --------------------------------------------------------------------------
//
// Class
//              Name:    RaidFileController
//              Purpose: Manages the configuration of the RaidFile system, handles
//                               communication with the daemon.
//              Created: 2003/07/08
//
// --------------------------------------------------------------------------
class RaidFileController
{
        friend class _RaidFileController;       // to avoid compiler warning
private:
        RaidFileController();
        RaidFileController(const RaidFileController &rController);
public:
        ~RaidFileController();
        
public:
        void Initialise(const std::string& rConfigFilename = 
                "/etc/boxbackup/raidfile.conf");
        int GetNumDiscSets() {return mSetList.size();}

        // --------------------------------------------------------------------------
        //
        // Function
        //              Name:    RaidFileController::GetController()
        //              Purpose: Gets the one and only controller object.
        //              Created: 2003/07/08
        //
        // --------------------------------------------------------------------------   
        static RaidFileController &GetController() {return mController;}
        RaidFileDiscSet &GetDiscSet(unsigned int DiscSetNum);

        static std::string DiscSetPathToFileSystemPath(unsigned int DiscSetNum, const std::string &rFilename, int DiscOffset);
        
private:
        std::vector<RaidFileDiscSet> mSetList;
        
        static RaidFileController mController;
};

#endif // RAIDFILECONTROLLER__H