TBPreScalerStreamerTool.cxx

Go to the documentation of this file.

/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#include "TBEventStreamerTool.h"
#include "TBPreScalerStreamerTool.h"
 
// already included in TBPreScalerStreamerTool.h
//#include "CLHEP/Random/RanluxEngine.h"
 
#include <string>
 
using CLHEP::RanluxEngine;
 
TBPreScalerStreamerTool::TBPreScalerStreamerTool(const std::string& type,
                         const std::string& name,
                         const IInterface* parent)
  : TBEventStreamerTool(type,name,parent)
    , m_acceptFraction(1.)
    , m_randomizer(nullptr)
{
  declareInterface<TBEventStreamerTool>(this); 
  declareProperty("AcceptEventFraction",m_acceptFraction);
}
 
TBPreScalerStreamerTool::~TBPreScalerStreamerTool()
{ }
 
StatusCode TBPreScalerStreamerTool::initializeTool()
{
  // check configuration
  if ( m_acceptFraction < 0 || m_acceptFraction > 1 )
    {
      MsgStream report(msgSvc(),name());
      report << MSG::ERROR
         << "event accept frequency outside allowed range [0,1]"
         << endmsg;
      return StatusCode::FAILURE;
    }
  // initialize randomizer
  m_randomizer = new RanluxEngine();
  return m_randomizer != 0
    ? StatusCode::SUCCESS
    : StatusCode::FAILURE;
}
 
StatusCode TBPreScalerStreamerTool::accept()
{
  return m_randomizer->flat() < m_acceptFraction
    ? StatusCode::SUCCESS
    : StatusCode::FAILURE;
}