DbiCache.h

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#ifndef DBICACHE_H
#define DBICACHE_H

#include <list>
#include <map>
#include <string>
using std::string;

#include "DatabaseInterface/Dbi.h"

class VldContext;
class DbiResult;
class DbiTableProxyRegistry;
class DbiTableProxy;
class DbiValidityRec;
class MsgStream;

class DbiCache
{

  friend   class DbiValidate;  // To allow access to purge.
public:

// Typedefs

typedef std::list<DbiResult*> ResultList_t;
 
// Constructors and destructors.

           DbiCache(DbiTableProxy& qp,
                    const string& tableName);
  virtual ~DbiCache();


// State testing member functions
          UInt_t GetMaxSize() const { return fMaxSize; } 
          UInt_t GetCurSize() const { return fCurSize; } 
          UInt_t GetNumAdopted() const { return fNumAdopted; } 
          UInt_t GetNumReused() const { return fNumReused; } 
const DbiResult* Search(const VldContext& vc,
                        const Dbi::Task& task) const;
const DbiResult* Search(const string& sqlQualifiers) const;

const DbiResult* Search(const DbiValidityRec& vr,
                        const string& sqlQualifiers = "") const;
      MsgStream& ShowStatistics(MsgStream& msg) const;

// State changing member functions
    void Adopt(DbiResult* res,bool registerKey = true);
    void Purge();
    void SetStale();

protected:

// State testing member functions

// State changing member functions

private:

// Disabled (not implemented) copy constructor and asignment.
 DbiCache(const DbiCache&);
 DbiCache& operator=(const DbiCache&);

  const ResultList_t* GetSubCache(Int_t aggNo) const;  
                void Purge(ResultList_t& subCache, const DbiResult* res=0);

// Data members
 

  DbiTableProxy&  fTableProxy;

  const string& fTableName;

  std::map<Int_t,ResultList_t> fCache;

  mutable UInt_t fCurSize;

  mutable UInt_t fMaxSize;

  mutable UInt_t fNumAdopted;

  mutable UInt_t fNumReused;


ClassDef(DbiCache,0)  //Query result cache for specific database table.

};


#endif  // DBICACHE_H

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