HLT TRD update and cleanup, changes according to offline TRD (Theodor)

[u/mrichter/AliRoot.git] / HLT / TRD / AliHLTTRDTrackerV1Component.cxx

// $Id: AliHLTTRDTrackerV1Component.cxx 23618 2008-01-29 13:07:38Z hristov $

//**************************************************************************
//* This file is property of and copyright by the ALICE HLT Project        * 
//* ALICE Experiment at CERN, All rights reserved.                         *
//*                                                                        *
//* Primary Authors:                                                       *
//*                  for The ALICE HLT Project.                            *
//*                                                                        *
//* Permission to use, copy, modify and distribute this software and its   *
//* documentation strictly for non-commercial purposes is hereby granted   *
//* without fee, provided that the above copyright notice appears in all   *
//* copies and that both the copyright notice and this permission notice   *
//* appear in the supporting documentation. The authors make no claims     *
//* about the suitability of this software for any purpose. It is          *
//* provided "as is" without express or implied warranty.                  *
//**************************************************************************

/** @file   AliHLTTRDTrackerV1Component.cxx
    @author 
    @date   
    @brief  A TRDTrackerV1 processing component for the HLT.
*/

#if __GNUC__ >= 3
using namespace std;
#endif

#include "AliHLTTRDTrackerV1Component.h"
#include "AliHLTTRDDefinitions.h"
#include "AliHLTTRDCluster.h"
#include "AliHLTTRDTrack.h"
#include "AliHLTTRDUtils.h"

#include "TFile.h"
#include "TChain.h"

#include "AliGeomManager.h"
#include "AliCDBManager.h"
#include "AliCDBStorage.h"
#include "AliCDBEntry.h"
#include "AliESDEvent.h"
#include "AliMagF.h"
#include "AliESDfriend.h"

#include "AliTRDcalibDB.h"
#include "AliTRDReconstructor.h"
#include "AliTRDtrackerV1.h"
#include "AliTRDrecoParam.h"

#include <cstdlib>
#include <cerrno>
#include <string>

#ifdef HAVE_VALGRIND_CALLGRIND_H
#include <valgrind/callgrind.h>
#else
#define CALLGRIND_START_INSTRUMENTATION do { } while (0)
#define CALLGRIND_STOP_INSTRUMENTATION do { } while (0)
#endif

ClassImp(AliHLTTRDTrackerV1Component)
    
AliHLTTRDTrackerV1Component::AliHLTTRDTrackerV1Component():
  AliHLTProcessor(),
  fOutputPercentage(100), // By default we copy to the output exactly what we got as input 
  fTracker(NULL),
  fRecoParam(NULL),
  fReconstructor(NULL),
  fESD(NULL),
  fClusterArray(NULL),
  fRecoParamType(-1),
  fNtimeBins(-1),
  fMagneticField(-1),
  fPIDmethod(1),
  fgeometryFileName(""),
  fieldStrength(-101),
  fSlowTracking(kFALSE),
  fOutputV1Tracks(kTRUE)
{
  // Default constructor

}

AliHLTTRDTrackerV1Component::~AliHLTTRDTrackerV1Component()
{
  // Destructor
}

const char* AliHLTTRDTrackerV1Component::GetComponentID()
{
  // Return the component ID const char *
  return "TRDTrackerV1"; // The ID of this component
}

void AliHLTTRDTrackerV1Component::GetInputDataTypes( vector<AliHLTComponent_DataType>& list)
{
  // Get the list of input data  
  list.clear(); // We do not have any requirements for our input data type(s).
  list.push_back(AliHLTTRDDefinitions::fgkClusterDataType);
}

AliHLTComponentDataType AliHLTTRDTrackerV1Component::GetOutputDataType()
{
  // Get the output data type
  return kAliHLTMultipleDataType;
}

int AliHLTTRDTrackerV1Component::GetOutputDataTypes(AliHLTComponentDataTypeList& tgtList)
{
  // Get the output data types
  tgtList.clear();
  //tgtList.push_back(AliHLTTRDDefinitions::fgkTimeBinPropagationDataType);
  tgtList.push_back(kAliHLTDataTypeTrack | kAliHLTDataOriginTRD);
  tgtList.push_back(AliHLTTRDDefinitions::fgkTRDSATracksDataType);
  return tgtList.size();
}

void AliHLTTRDTrackerV1Component::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier )
{
  // Get the output data size
  constBase = 0;
  inputMultiplier = ((double)fOutputPercentage)/100.0;
}

// Spawn function, return new instance of this class
AliHLTComponent* AliHLTTRDTrackerV1Component::Spawn()
{
  return new AliHLTTRDTrackerV1Component;
};


int AliHLTTRDTrackerV1Component::DoInit( int argc, const char** argv )
{
  // perform initialization. We check whether our relative output size is specified in the arguments.
  int iResult=0;

  fReconstructor = new AliTRDReconstructor();
  HLTDebug("TRDReconstructor at 0x%x", fReconstructor);

  fESD = new AliESDEvent;
  fESD->CreateStdContent();
  
  TString configuration="";
  TString argument="";
  for (int i=0; i<argc && iResult>=0; i++) {
    argument=argv[i];
    if (!configuration.IsNull()) configuration+=" ";
    configuration+=argument;
  }

  if (!configuration.IsNull()) {
    iResult=Configure(configuration.Data());
  } else {
    iResult=Reconfigure(NULL, NULL);
  }

  if(iResult<0) return iResult;

  fTracker = new AliTRDtrackerV1();
  HLTDebug("TRDTracker at 0x%x", fTracker);
  fTracker->SetReconstructor(fReconstructor);

  fClusterArray = new TClonesArray("AliTRDcluster"); // would be nice to allocate memory for all clusters here.

  return iResult;
}

int AliHLTTRDTrackerV1Component::DoDeinit()
{
  // Deinitialization of the component

  fTracker->SetClustersOwner(kFALSE);
  delete fTracker;
  fTracker = NULL;

  fClusterArray->Delete();
  delete fClusterArray;
  fClusterArray = NULL;
  
  // We need to set clusters in Reconstructor to null to prevent from 
  // double deleting, since we delete TClonesArray by ourself.
  fReconstructor->SetClusters(0x0);
  delete fReconstructor;
  fReconstructor = NULL;
  delete fESD;
  fESD = NULL;
  
  AliTRDcalibDB::Terminate();

  return 0;
}

int AliHLTTRDTrackerV1Component::DoEvent( const AliHLTComponentEventData& evtData, 
					  const AliHLTComponentBlockData* blocks, 
					  AliHLTComponent_TriggerData& /*trigData*/, 
					  AliHLTUInt8_t* outputPtr, 
					  AliHLTUInt32_t& size, 
					  vector<AliHLTComponent_BlockData>& outputBlocks )
{
  // Process an event

  if (evtData.fEventID == 1)
    CALLGRIND_START_INSTRUMENTATION;

  HLTDebug("NofBlocks %i", evtData.fBlockCnt );
  
  fESD->Reset();
  //fESD->SetMagneticField(fSolenoidBz);

  AliHLTUInt32_t totalSize = 0, offset = 0;

  vector<AliHLTComponent_DataType> expectedDataTypes;
  GetInputDataTypes(expectedDataTypes);
  for ( unsigned long iBlock = 0; iBlock < evtData.fBlockCnt; iBlock++ ) 
    {
      const AliHLTComponentBlockData &block = blocks[iBlock];
      AliHLTComponentDataType inputDataType = block.fDataType;
      Bool_t correctDataType = kFALSE;

      for(UInt_t i = 0; i < expectedDataTypes.size(); i++){
	if( expectedDataTypes.at(i) == inputDataType)
	  correctDataType = kTRUE;
      }
      if (!correctDataType)
	{
	  HLTDebug( "Block # %i/%i; Event 0x%08LX (%Lu) Wrong received datatype: %s - Skipping",
		    iBlock, evtData.fBlockCnt-1,
		    evtData.fEventID, evtData.fEventID, 
		    DataType2Text(inputDataType).c_str());
	  continue;
	}
      else {
	HLTDebug("We get the right data type: Block # %i/%i; Event 0x%08LX (%Lu) Received datatype: %s; Block Size: %i",
		 iBlock, evtData.fBlockCnt-1,
		 evtData.fEventID, evtData.fEventID, 
		 DataType2Text(inputDataType).c_str(),
		 block.fSize);
      }

#ifndef NDEBUG
      unsigned long constBase;
      double inputMultiplier;
      GetOutputDataSize(constBase,inputMultiplier);
      if(size<(constBase+block.fSize*inputMultiplier)){
	HLTWarning("Memory Block given might be too small: %i < %i; Event %Lu", size, constBase+block.fSize*inputMultiplier, evtData.fEventID);
      }
#endif      

      AliHLTTRDUtils::ReadClusters(fClusterArray, block.fPtr, block.fSize, &fNtimeBins);
      HLTDebug("Reading number of time bins from input block. Changing number of timebins to %d", fNtimeBins);
      AliTRDtrackerV1::SetNTimeBins(fNtimeBins);

      HLTDebug("TClonesArray of clusters: nbEntries = %i", fClusterArray->GetEntriesFast());
      fTracker->LoadClusters(fClusterArray);

      fTracker->Clusters2Tracks(fESD);

      Int_t nTracks = fESD->GetNumberOfTracks();
      HLTInfo("Number of tracks  == %d ==", nTracks);  

      TClonesArray* trdTracks;
      trdTracks = fTracker->GetListOfTracks();
      
      if(nTracks>0){
	HLTDebug("We have an output ESDEvent: 0x%x with %i tracks", fESD, nTracks);
	AliHLTUInt32_t addedSize = AliHLTTRDUtils::AddESDToOutput(fESD, outputPtr+offset);
	totalSize += addedSize;
	  
	// Fill block 
	AliHLTComponentBlockData bd;
	FillBlockData( bd );
	//bd.fPtr = outputPtr;
	bd.fOffset = offset;
	bd.fSize = addedSize;
	bd.fSpecification = block.fSpecification;
	bd.fDataType = kAliHLTDataTypeTrack | kAliHLTDataOriginTRD;
	outputBlocks.push_back( bd );
	HLTDebug("BD ptr 0x%x, offset %i, size %i, datav1Type %s, spec 0x%x ", bd.fPtr, bd.fOffset, bd.fSize, DataType2Text(bd.fDataType).c_str(), bd.fSpecification);
	offset = totalSize;

	if (fOutputV1Tracks && trdTracks){
	  HLTDebug("We have an output array: pointer to trdTracks = 0x%x, nbEntries = %i", trdTracks, trdTracks->GetEntriesFast());
	  
	  addedSize = AliHLTTRDUtils::AddTracksToOutput(trdTracks, outputPtr+offset, fNtimeBins);
	  totalSize += addedSize;
	  
	  // Fill block 
	  FillBlockData( bd );
	  //bd.fPtr = outputPtr;
	  bd.fOffset = offset;
	  bd.fSize = addedSize;
	  bd.fSpecification = block.fSpecification;
	  bd.fDataType = AliHLTTRDDefinitions::fgkTRDSATracksDataType;
	  outputBlocks.push_back( bd );
	  HLTDebug("BD ptr 0x%x, offset %i, size %i, dataType %s, spec 0x%x ", bd.fPtr, bd.fOffset, bd.fSize, DataType2Text(bd.fDataType).c_str(), bd.fSpecification);
	  offset = totalSize;
	}
      }
      
      HLTDebug("totalSize: %i", totalSize);
      
//       if ( totalSize > allocSize )
// 	{
// 	  HLTError("Too much data; Data written over allowed buffer. Amount written: %lu, allowed amount: %lu.",
// 	  totalSize, size );
// 	  return EMSGSIZE;
// 	}

      //here we are deleting clusters (but not the TClonesArray itself)
      fTracker->UnloadClusters();
      AliTRDReconstructor::SetClusters(0x0);
      fClusterArray->Delete();
      
    }
      
  size = totalSize;
  HLTDebug("Event is done. size written to the output is %i", size);
  return 0;
}

int AliHLTTRDTrackerV1Component::Configure(const char* arguments){
  int iResult=0;
  if (!arguments) return iResult;
  
  TString allArgs=arguments;
  TString argument;
  int bMissingParam=0;

  TObjArray* pTokens=allArgs.Tokenize(" ");
  if (pTokens) {
    for (int i=0; i<pTokens->GetEntries() && iResult>=0; i++) {
      argument=((TObjString*)pTokens->At(i))->GetString();
      if (argument.IsNull()) continue;
      
      if (argument.CompareTo("output_percentage")==0) {
	if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
	HLTInfo("Setting output percentage to: %s", ((TObjString*)pTokens->At(i))->GetString().Data());
	fOutputPercentage=((TObjString*)pTokens->At(i))->GetString().Atoi();
	continue;
      } 
      else if (argument.CompareTo("-solenoidBz")==0) {
	if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
	fieldStrength=((TObjString*)pTokens->At(i))->GetString().Atof();
	HLTInfo("Setting Magnetic field to %.1f KGauss", fieldStrength);
	continue;
      } 
      else if (argument.CompareTo("-NTimeBins")==0) {
	if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
	HLTInfo("Setting number of time bins to: %s", ((TObjString*)pTokens->At(i))->GetString().Data());
	fNtimeBins=((TObjString*)pTokens->At(i))->GetString().Atoi();
	continue;
      } 
      else if (argument.CompareTo("-geometry")==0) {
	if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
	HLTInfo("Setting geometry to: %s", ((TObjString*)pTokens->At(i))->GetString().Data());
	fgeometryFileName=((TObjString*)pTokens->At(i))->GetString();
	continue;
      } 
      else if (argument.CompareTo("-lowflux")==0) {
	fRecoParamType = 0;
	HLTInfo("Low flux reconstruction selected");
	continue;
      }
      else if (argument.CompareTo("-highflux")==0) {
	fRecoParamType = 1;
	HLTInfo("High flux reconstruction selected");
	continue;
      }
      else if (argument.CompareTo("-cosmics")==0) {
	fRecoParamType = 2;
	HLTInfo("Cosmics reconstruction selected");
	continue;
      }
      else if (argument.CompareTo("-magnetic_field_ON")==0) {
 	fMagneticField = 1;
	HLTInfo("Reconstructon with magnetic field");
	continue;
      }
      else if (argument.CompareTo("-magnetic_field_OFF")==0) {
	fMagneticField = 0;
	HLTInfo("Reconstructon without magnetic field");
	continue;
      }
      else if (argument.CompareTo("-slowTracking")==0) {
	fSlowTracking = kTRUE;
	HLTInfo("Using slow tracking");
	continue;
      }
      else if (argument.CompareTo("-outputV1Tracks")==0) {
	if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
	TString toCompareTo=((TObjString*)pTokens->At(i))->GetString();
	if (toCompareTo.CompareTo("yes")==0){
	  HLTInfo("Setting OutputV1Tracks to: %s", toCompareTo.Data());
	  fOutputV1Tracks=kTRUE;
	}
	else if (toCompareTo.CompareTo("no")==0){
	  HLTInfo("Setting OutputV1Tracks to: %s", toCompareTo.Data());
	  fOutputV1Tracks=kFALSE;
	}
	else {
	  HLTError("unknown argument for OutputV1Tracks: %s", toCompareTo.Data());
	  iResult=-EINVAL;
	  break;
	}
	continue;
      } 
      else if (argument.CompareTo("-PIDmethod")==0) {
	if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
	TString toCompareTo=((TObjString*)pTokens->At(i))->GetString();
	if (toCompareTo.CompareTo("LH")==0){
	  HLTInfo("Setting PID method to: %s", toCompareTo.Data());
	  fPIDmethod=0;
	}
	else if (toCompareTo.CompareTo("NN")==0){
	  HLTInfo("Setting PID method to: %s", toCompareTo.Data());
	  fPIDmethod=1;
	}
	else if (toCompareTo.CompareTo("TM")==0){
	  HLTInfo("Setting PID method to: %s", toCompareTo.Data());
	  fPIDmethod=2;
	}
	else {
	  HLTError("unknown argument for PID method: %s", toCompareTo.Data());
	  iResult=-EINVAL;
	  break;
	}
	continue;
      } 
      
      else {
	HLTError("unknown argument: %s", argument.Data());
	iResult=-EINVAL;
	break;
      }
    }
    delete pTokens;
  }
  if (bMissingParam) {
    HLTError("missing parameter for argument %s", argument.Data());
    iResult=-EINVAL;
  }
  if(iResult>=0){
    iResult=SetParams();
  }
  return iResult;
}

int AliHLTTRDTrackerV1Component::SetParams()
{
  Int_t iResult=0;
  if(!AliCDBManager::Instance()->IsDefaultStorageSet()){
    HLTError("DefaultStorage is not set in CDBManager");
    return -EINVAL;
  }
  if(AliCDBManager::Instance()->GetRun()<0){
    HLTError("Run Number is not set in CDBManager");
    return -EINVAL;
  }
  HLTInfo("CDB default storage: %s; RunNo: %i", (AliCDBManager::Instance()->GetDefaultStorage()->GetBaseFolder()).Data(), AliCDBManager::Instance()->GetRun());

  if(!AliGeomManager::GetGeometry()){
    if(fgeometryFileName.CompareTo("")==0 || !TFile::Open(fgeometryFileName.Data())){
      HLTInfo("Loading standard geometry file");
      AliGeomManager::LoadGeometry();
    }else{
      HLTWarning("Loading NON-standard geometry file");
      AliGeomManager::LoadGeometry(fgeometryFileName.Data());
    }
    if(!AliGeomManager::GetGeometry()){
      HLTError("Could not load geometry");
      return -EINVAL;
    }
  }
  else{
    HLTInfo("Geometry Already Loaded!");
  }

  if (fNtimeBins <= 0)
    {
      HLTError("Sorry. Tracker needs number of time bins. At the moment you have to provide it with -NTimeBins <value>. The simulation always had 24 and the real data 30. Take your pick. Make sure the information is correct. Ask offline to implement how to propagate this information into clusters/cluster tree.");
      return -EINVAL;
    }
  if (fNtimeBins < 24 || fNtimeBins > 30)
    {
      HLTWarning("The number of time bins seems to be strange = %d. But okay. Let's try it...", fNtimeBins);
    }
  if (fNtimeBins != 24)
    {
      HLTWarning("All PID methods eagerly await 24 time bins, so PID will NOT work!", fNtimeBins);
    }
  HLTDebug("Setting number of time bins of the tracker to: %i", fNtimeBins);
  AliTRDtrackerV1::SetNTimeBins(fNtimeBins);
  
  TString recoOptions="sa,sl_tr_0,!cw";
  
  if(!fSlowTracking)
    recoOptions += ",hlt";

  switch(fPIDmethod){
  case 0: recoOptions += ",!nn"; break;
  case 1: recoOptions += ",nn"; break;
  case 2: recoOptions += ",!nn"; break;
  }

  if (fRecoParamType == 0)
    {
      HLTDebug("Low flux params init.");
      fRecoParam = AliTRDrecoParam::GetLowFluxParam();
    }

  if (fRecoParamType == 1)
    {
      HLTDebug("High flux params init.");
      fRecoParam = AliTRDrecoParam::GetHighFluxParam();
    }
  
  if (fRecoParamType == 2)
    {
      HLTDebug("Cosmic Test params init.");
      fRecoParam = AliTRDrecoParam::GetCosmicTestParam();
    }

  if (fRecoParam == 0)
    {
      HLTError("No reco params initialized. Sniffing big trouble!");
      return -EINVAL;
    }

  fReconstructor->SetRecoParam(fRecoParam);

  HLTDebug("Reconstructor options are: %s",recoOptions.Data());
  fReconstructor->SetOption(recoOptions.Data());

  if (fMagneticField >= 0)
    {
      HLTWarning("Setting magnetic field by hand!");
    }
  if (!TGeoGlobalMagField::Instance()->IsLocked()) {
    AliMagF* field;
    if (fMagneticField == 0){
      // magnetic field OFF
      field = new AliMagF("Maps","Maps",2,0.,0., 10.,AliMagF::k5kGUniform);
      TGeoGlobalMagField::Instance()->SetField(field);
      HLTDebug("Magnetic field is OFF.");
    }else{
      // magnetic field ON
      field = new AliMagF("Maps","Maps",2,1.,1., 10.,AliMagF::k5kG);
      TGeoGlobalMagField::Instance()->SetField(field);
      HLTDebug("Magnetic field is ON.");
      if( fMagneticField < 0 )
	iResult=ReconfigureField();
    }
  }else{
    HLTError("Magnetic field is already set and locked, cannot redefine it." );
  }
  return iResult;
}

int AliHLTTRDTrackerV1Component::ReconfigureField()
{
  int iResult=0;
  if(fieldStrength<-100){
    const char* pathBField=kAliHLTCDBSolenoidBz;

    if (pathBField) {
      HLTInfo("reconfigure B-Field from entry %s", pathBField);
      AliCDBEntry *pEntry = AliCDBManager::Instance()->Get(pathBField/*,GetRunNo()*/);
      if (pEntry) {
	TObjString* pString=dynamic_cast<TObjString*>(pEntry->GetObject());
	if (pString) {
	  HLTInfo("received configuration object string: \'%s\'", pString->GetString().Data());
	  TObjArray* pTokens=pString->GetString().Tokenize(" ");
	  TString argument;
	  int bMissingParam=0;
	  if (pTokens) {
	    for (int i=0; i<pTokens->GetEntries() && iResult>=0; i++) {
	      argument=((TObjString*)pTokens->At(i))->GetString();
	      if (argument.IsNull()) continue;
      
	      if (argument.CompareTo("-solenoidBz")==0) {
		if ((bMissingParam=(++i>=pTokens->GetEntries()))) break;
		HLTDebug("Magnetic field in CDB: %s", ((TObjString*)pTokens->At(i))->GetString().Data());
		fieldStrength=((TObjString*)pTokens->At(i))->GetString().Atof();
		continue;
	      } else {
		HLTError("unknown argument %s", argument.Data());
		iResult=-EINVAL;
		break;
	      }
	    }
	    delete pTokens;
	  }
	} else {
	  HLTError("configuration object \"%s\" has wrong type, required TObjString", pathBField);
	}
      } else {
	HLTError("cannot fetch object \"%s\" from CDB", pathBField);
      }
    }
  }

  if(fieldStrength>=-100){
    AliMagF* field = (AliMagF *) TGeoGlobalMagField::Instance()->GetField();
    HLTDebug("Magnetic field before change: %f KGauss", field->SolenoidField());
    field->SetFactorSol(1);
    Double_t initialFieldStrengh=field->SolenoidField();
    field->SetFactorSol(fieldStrength/initialFieldStrengh);
    HLTDebug("Magnetic field was changed to %f KGauss.", field->SolenoidField());
  }
  return iResult;
}

int AliHLTTRDTrackerV1Component::Reconfigure(const char* cdbEntry, const char* chainId)
{
  // see header file for class documentation

  int iResult=0;
  const char* path="HLT/ConfigTRD/TrackerV1Component";
  const char* defaultNotify="";
  if (cdbEntry) {
    path=cdbEntry;
    defaultNotify=" (default)";
  }
  if (path) {
    HLTInfo("reconfigure from entry %s%s, chain id %s", path, defaultNotify,(chainId!=NULL && chainId[0]!=0)?chainId:"<none>");
    AliCDBEntry *pEntry = AliCDBManager::Instance()->Get(path/*,GetRunNo()*/);
    if (pEntry) {
      TObjString* pString=dynamic_cast<TObjString*>(pEntry->GetObject());
      if (pString) {
  	HLTInfo("received configuration object string: \'%s\'", pString->GetString().Data());
  	iResult=Configure(pString->GetString().Data());
      } else {
  	HLTError("configuration object \"%s\" has wrong type, required TObjString", path);
      }
    } else {
      HLTError("cannot fetch object \"%s\" from CDB", path);
    }
  }

  const char* pathBField=kAliHLTCDBSolenoidBz;

  if (pathBField) {
    HLTInfo("reconfigure B-Field from entry %s, chain id %s", pathBField,(chainId!=NULL && chainId[0]!=0)?chainId:"<none>");
    AliCDBEntry *pEntry = AliCDBManager::Instance()->Get(pathBField/*,GetRunNo()*/);
    if (pEntry) {
      TObjString* pString=dynamic_cast<TObjString*>(pEntry->GetObject());
      if (pString) {
	HLTInfo("received configuration object string: \'%s\'", pString->GetString().Data());
	iResult=Configure(pString->GetString().Data());
      } else {
	HLTError("configuration object \"%s\" has wrong type, required TObjString", pathBField);
      }
    } else {
      HLTError("cannot fetch object \"%s\" from CDB", pathBField);
    }
  }
  
  return iResult;

}

int AliHLTTRDTrackerV1Component::ReadPreprocessorValues(const char* modules)
{
  // see header file for class documentation
  
  int iResult = 0;
  TString str(modules);
  if(str.Contains("HLT") || str.Contains("TRD") || str.Contains("GRP")){
  
    const char* pathBField=kAliHLTCDBSolenoidBz;
    if (pathBField) {

      HLTInfo("reconfigure B-Field from entry %s, modules %s", pathBField,(modules!=NULL && modules[0]!=0)?modules:"<none>");
      AliCDBEntry *pEntry = AliCDBManager::Instance()->Get(pathBField/*,GetRunNo()*/);
      
      // AliCDBPath path(pathBField);
      
      // AliCDBStorage *stor = AliCDBManager::Instance()->GetDefaultStorage();
      // Int_t version    = stor->GetLatestVersion(pathBField, GetRunNo());
      // Int_t subVersion = stor->GetLatestSubVersion(pathBField, GetRunNo(), version);
      // AliCDBEntry *pEntry = stor->Get(path,GetRunNo(), version, subVersion);
      
      // HLTInfo("RunNo %d, Version %d, subversion %d", GetRunNo(), version, subVersion);
      
      if (pEntry) {
    	TObjString* pString=dynamic_cast<TObjString*>(pEntry->GetObject());
    	if (pString) {
   	  HLTInfo("received configuration object string: \'%s\'", pString->GetString().Data());
   	  iResult=Configure(pString->GetString().Data());
    	} else {
   	  HLTError("configuration object \"%s\" has wrong type, required TObjString", pathBField);
    	}
      } else {
    	HLTError("cannot fetch object \"%s\" from CDB", pathBField);
      }
    }
  }  
  return iResult;
}