DbiTimer.h

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// $Id: DbiTimer.h,v 1.3 2003/02/27 16:16:29 west Exp $

#ifndef DBITIMER
#define DBITIMER

// DbiTimer                                                           //
//                                                                    //
// Package: Dbi (Database Interface).                                 //
//                                                                    //
// N. West 01/2002                                                    //
//                                                                    //
// Concept: Simple timer record query progress and final times.       //
//                                                                    //
// Purpose: To find out why this is all soooo sssllloooowwww!         //
//                                                                    //

#include <string>

#include "TStopwatch.h"
#include "DatabaseInterface/DbiFieldType.h"

class DbiTableMetaData;

class DbiTimer
{

public:

// Constructors and destructors.
           DbiTimer();
  virtual ~DbiTimer();

// State testing member functions

// State changing member functions
    void RecBegin(string tableName, UInt_t rowSize);
    void RecEnd(UInt_t numRows);
    void RecFillAgg(Int_t aggNo);
    void RecMainQuery();
    void Resume();
    void StartSubWatch(UInt_t subWatch);
    void Suspend();

// Global timer used for all queries to the DBI.

private:  

 enum  QueryStage { kPassive, kInitialQuery, kMainQuery };
 enum { kMaxSubWatch = 4 };  // Must be > 0.

// Data members

       Int_t fCurSubWatch; // Current SubWatch or -1 if disabled.
      UInt_t fRowSize;     // Size of row object
  QueryStage fQueryStage;  // Query stage
  TStopwatch fSubWatches[kMaxSubWatch]; // Partial timers
      string fTableName;   // Current table
  TStopwatch fWatch;       // Timer

 ClassDef(DbiTimer,0)     // Simple query timer

};


#endif // DBITIMER

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