/data/refman/pasoursint/CMSSW_6_1_1/src/CondTools/L1Trigger/interface/L1ConfigOnlineProdBase.h

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#ifndef CondTools_L1Trigger_L1ConfigOnlineProdBase_h
#define CondTools_L1Trigger_L1ConfigOnlineProdBase_h
// -*- C++ -*-
//
// Package:     L1Trigger
// Class  :     L1ConfigOnlineProdBase
// 
//
// Original Author:  Werner Sun
//         Created:  Tue Sep  2 22:48:15 CEST 2008
// $Id: L1ConfigOnlineProdBase.h,v 1.10 2010/07/21 16:22:19 govi Exp $
//

// system include files
#include <memory>
#include "boost/shared_ptr.hpp"

// user include files
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "FWCore/Framework/interface/ModuleFactory.h"
#include "FWCore/Framework/interface/ESProducer.h"
#include "FWCore/Framework/interface/ESHandle.h"

#include "CondFormats/L1TObjects/interface/L1TriggerKeyList.h"
#include "CondFormats/DataRecord/interface/L1TriggerKeyListRcd.h"
#include "CondFormats/L1TObjects/interface/L1TriggerKey.h"
#include "CondFormats/DataRecord/interface/L1TriggerKeyRcd.h"

#include "CondTools/L1Trigger/interface/OMDSReader.h"
#include "CondTools/L1Trigger/interface/DataWriter.h"
#include "CondTools/L1Trigger/interface/Exception.h"

#include "FWCore/Utilities/interface/typelookup.h"
#include "FWCore/Framework/interface/EventSetup.h"

#include "CondCore/DBCommon/interface/DbSession.h"
#include "CondCore/DBCommon/interface/DbConnection.h"
#include "CondCore/DBCommon/interface/DbScopedTransaction.h"

// forward declarations

template< class TRcd, class TData >
class L1ConfigOnlineProdBase : public edm::ESProducer {
   public:
      L1ConfigOnlineProdBase(const edm::ParameterSet&);
      ~L1ConfigOnlineProdBase();

      boost::shared_ptr< TData > produce(const TRcd& iRecord);

      virtual boost::shared_ptr< TData > newObject(
        const std::string& objectKey ) = 0 ;

   private:
      // ----------member data ---------------------------

 protected:
      l1t::OMDSReader m_omdsReader ;
      bool m_forceGeneration ;

      // Called from produce methods.
      // bool is true if the object data should be made.
      // If bool is false, produce method should throw
      // DataAlreadyPresentException.
      bool getObjectKey( const TRcd& record,
                         boost::shared_ptr< TData > data,
                         std::string& objectKey ) ;

      // For reading object directly from a CondDB w/o PoolDBOutputService
      cond::DbConnection m_dbConnection ;
      cond::DbSession m_dbSession ;
      bool m_copyFromCondDB ;
};


template< class TRcd, class TData >
L1ConfigOnlineProdBase<TRcd, TData>::L1ConfigOnlineProdBase(const edm::ParameterSet& iConfig)
   : m_omdsReader(),
     m_forceGeneration( iConfig.getParameter< bool >( "forceGeneration" ) ),
     m_dbConnection(),
     m_dbSession(),
     m_copyFromCondDB( false )
{
   //the following line is needed to tell the framework what
   // data is being produced
  setWhatProduced(this);

   //now do what ever other initialization is needed

  if( iConfig.exists( "copyFromCondDB" ) )
    {
      m_copyFromCondDB = iConfig.getParameter< bool >( "copyFromCondDB" ) ;

      if( m_copyFromCondDB )
        {
          // Connect DbSession
          m_dbConnection.configuration().setAuthenticationPath(
             iConfig.getParameter< std::string >( "onlineAuthentication" ) ) ;
          m_dbConnection.configure() ;
          m_dbSession = m_dbConnection.createSession() ;
          m_dbSession.open(
                           iConfig.getParameter< std::string >( "onlineDB" ),
                           true ); // read-only
        }
    }
  else
    {
      m_omdsReader.connect(
        iConfig.getParameter< std::string >( "onlineDB" ),
        iConfig.getParameter< std::string >( "onlineAuthentication" ) ) ;
    }
}

template< class TRcd, class TData >
L1ConfigOnlineProdBase<TRcd, TData>::~L1ConfigOnlineProdBase()
{
 
   // do anything here that needs to be done at desctruction time
   // (e.g. close files, deallocate resources etc.)

}

template< class TRcd, class TData >
boost::shared_ptr< TData >
L1ConfigOnlineProdBase<TRcd, TData>::produce( const TRcd& iRecord )
{
   using namespace edm::es;
   boost::shared_ptr< TData > pData ;

   // Get object key and check if already in ORCON
   std::string key ;
   if( getObjectKey( iRecord, pData, key ) || m_forceGeneration )
   {
     if( m_copyFromCondDB )
       {
         // Get L1TriggerKeyList from EventSetup
         const L1TriggerKeyListRcd& keyListRcd =
           iRecord.template getRecord< L1TriggerKeyListRcd >() ;
         edm::ESHandle< L1TriggerKeyList > keyList ;
         keyListRcd.get( keyList ) ;

         // Find payload token
         std::string recordName = edm::typelookup::className<TRcd>();
         std::string dataType = edm::typelookup::className<TData>();
         std::string payloadToken =
           keyList->token( recordName, dataType, key ) ;

         edm::LogVerbatim( "L1-O2O" )
           << "Copying payload for " << recordName
           << "@" << dataType << " obj key " << key
           << " from CondDB." ;
         edm::LogVerbatim( "L1-O2O" )
           << "TOKEN " << payloadToken ;

         // Get object from POOL
         // Copied from l1t::DataWriter::readObject()
         if( !payloadToken.empty() )
           {
             cond::DbScopedTransaction tr( m_dbSession ) ;
             tr.start( true ) ; 
             pData = m_dbSession.getTypedObject<TData>( payloadToken ) ;
             tr.commit ();
           }
       }
     else
       {
         pData = newObject( key ) ;
       }

     //     if( pData.get() == 0 )
     if( pData == boost::shared_ptr< TData >() )
       {
         std::string dataType = edm::typelookup::className<TData>();

         throw l1t::DataInvalidException( "Unable to generate " +
                                          dataType + " for key " + key +
                                          "." ) ;
       }
   }
   else
   {
     std::string dataType = edm::typelookup::className<TData>();

     throw l1t::DataAlreadyPresentException( dataType +
        " for key " + key + " already in CondDB." ) ;
   }

   return pData ;
}


template< class TRcd, class TData >
bool 
L1ConfigOnlineProdBase<TRcd, TData>::getObjectKey(
  const TRcd& record,
  boost::shared_ptr< TData > data,
  std::string& objectKey )
{
   // Get L1TriggerKey
   const L1TriggerKeyRcd& keyRcd =
      record.template getRecord< L1TriggerKeyRcd >() ;

   // Explanation of funny syntax: since record is dependent, we are not
   // expecting getRecord to be a template so the compiler parses it
   // as a non-template. https://gcc.gnu.org/ml/gcc-bugs/2005-11/msg03685.html

   // If L1TriggerKey is invalid, then all configuration objects are
   // already in ORCON.
   edm::ESHandle< L1TriggerKey > key ;
   try
   {
      keyRcd.get( key ) ;
   }
   catch( l1t::DataAlreadyPresentException& ex )
   {
      objectKey = std::string() ;
      return false ;      
   }

   // Get object key from L1TriggerKey
   std::string recordName = edm::typelookup::className<TRcd>();
   std::string dataType = edm::typelookup::className<TData>();

   objectKey = key->get( recordName, dataType ) ;

/*    edm::LogVerbatim( "L1-O2O" ) */
/*      << "L1ConfigOnlineProdBase record " << recordName */
/*      << " type " << dataType << " obj key " << objectKey ; */

   // Get L1TriggerKeyList
   L1TriggerKeyList keyList ;
   l1t::DataWriter dataWriter ;
   if( !dataWriter.fillLastTriggerKeyList( keyList ) )
     {
       edm::LogError( "L1-O2O" )
         << "Problem getting last L1TriggerKeyList" ;
     }

   // If L1TriggerKeyList does not contain object key, token is empty
   return
      keyList.token( recordName, dataType, objectKey ) == std::string() ;
}

#endif