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---

/BdbCond/BdbCache.cc

Go to the documentation of this file.

//-----------------------------------------------------------------------------
//
// File and Version Information:
//      $Id: BdbCache.cc,v 1.19 2002/08/07 21:45:25 gapon Exp $
//
// Description:
//      Class BdbCache
//
// Environment:
//      Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author List:
//      David R. Quarrie                Original Author
//      David Brown                     Rewrite 6/10/97
//
// Copyright Information:
//      Copyright (C) 1994, 1995        Lawrence Berkeley Laboratory
//
//-----------------------------------------------------------------------------

//-----------------
// BaBar Headers --
//-----------------
#include "BaBar/BaBar.hh"

//-----------------------
// This Class's Header --
//-----------------------
#include "BdbCond/BdbCache.hh"

//-------------
// C Headers --
//-------------
extern "C" {
#include <stddef.h>
}

//---------------
// C++ Headers --
//---------------
#include <iostream.h>
#include <string.h>
#include <string>
using std::string;

//-------------------------------
// Collaborating Class Headers --
//-------------------------------
#include "BdbCond/BdbObsoleteDatabase.hh"
#include "BdbTime/BdbTime.hh"

//-----------------------------------------------------------------------
// Local Macros, Typedefs, Structures, Unions and Forward Declarations --
//-----------------------------------------------------------------------

static const char rscid[] = "$Id: BdbCache.cc,v 1.19 2002/08/07 21:45:25 gapon Exp $";

//----------------
// Constructors --
//----------------

BdbCache::BdbCache( ) :
  _database     ( NULL ),
  _containerName( '\0' ),
  _TLA          ( '\0' ),
  _tag          ( NULL ),
  _interval     ( NULL ),
  _object       ( NULL )
{
}

BdbCache::BdbCache( const char* theSubsystemName,
                    const char* theContainerName,
                    d_ULong     theTag ) :
  _database     ( new BdbObsoleteDatabase( theSubsystemName ) ),
  _containerName( theContainerName ),
  _TLA          ( theSubsystemName ),
  _tag          ( theTag           ),
  _interval     ( NULL             ),
  _object       ( NULL             )
{
}

BdbCache::BdbCache( const BdbCache& theCache )
{
  _database      = new BdbObsoleteDatabase( *(theCache._database) );
  _containerName = theCache._containerName;
  _TLA           = theCache._TLA;
  _tag           = theCache._tag;
  _interval      = theCache._interval;
  _object        = theCache._object;
}

//--------------
// Destructor --
//--------------

BdbCache::~BdbCache( )
{
  delete _database;
}

//-----------------------
// Assignment Operator --
//-----------------------

BdbCache& BdbCache::operator = ( const BdbCache& theCache )
{
  if ( this == &theCache )
    {
      return *this;
    }

  delete _database;
  _database      = new BdbObsoleteDatabase( *(theCache._database) );
  _containerName = theCache._containerName;
  _TLA           = theCache._TLA;
  _tag           = theCache._tag;
  _interval      = theCache._interval;
  _object        = theCache._object;
  return *this;
}


BdbIfdHandle<BdbObject>&
BdbCache::ifdFetch( const BdbTime& theTime )
{
  if ( _interval != NULL && _interval->inInterval(theTime) )
    {
      // Return the cached object
#ifdef BDBDATABASE_DEBUG
      cout << "Returning cached object" << endl;
#endif
      return _object;
    }
  else
    {
      // Search the db for the object
#ifdef BDBDATABASE_DEBUG
      cout << "searching db for object" << endl;
#endif
      BdbHandle(BdbObject) theObjectH;
      _database->findObject( theObjectH, _containerName.c_str(), theTime, _tag );

      BdbHandle(BdbInterval) theIntervalH;
      _database->findInterval( theIntervalH, _containerName.c_str(), theTime, _tag );

      _interval = theIntervalH;
      _object   = theObjectH;
      return _object;
    }
}

BdbHandle(BdbObject)
BdbCache::fetch( const BdbTime& theTime ) 
{
  return *( ifdFetch(theTime) );
}

 

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Last Update: October 04, 2002