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sampleName = "/RelValJpsiMM/CMSSW_3_5_0_pre2-STARTUP3X_V14-v1/GEN-SIM-RECO"

import FWCore.ParameterSet.Config as cms

process = cms.Process('HEAVYFLAVORVALIDATIONHARVESTING')

process.load('Configuration/StandardSequences/Services_cff')
process.load('FWCore/MessageService/MessageLogger_cfi')

process.maxEvents = cms.untracked.PSet(
    input = cms.untracked.int32(-1)
)

process.options = cms.untracked.PSet(
    Rethrow = cms.untracked.vstring('ProductNotFound'),
    fileMode = cms.untracked.string('FULLMERGE')
)

process.source = cms.Source("PoolSource",
    processingMode = cms.untracked.string('RunsAndLumis'),
    fileNames = cms.untracked.vstring()
)

process.load('Configuration/StandardSequences/EDMtoMEAtRunEnd_cff')
process.dqmSaver.dirName = '/tmp/'
#process.dqmSaver.referenceHandling = 'all'
process.load('HLTriggerOffline/HeavyFlavor/heavyFlavorValidationHarvestingSequence_cff')

process.edmtome_step = cms.Path(process.EDMtoME)
process.validationHarvesting = cms.Path(process.heavyFlavorValidationHarvestingSequence)
process.dqmsave_step = cms.Path(process.DQMSaver)

process.schedule = cms.Schedule(process.edmtome_step,process.validationHarvesting,process.dqmsave_step)

import sys
from DBSAPI.dbsApi import DbsApi
from DBSAPI.dbsException import *
from DBSAPI.dbsApiException import *
from DBSAPI.dbsOptions import DbsOptionParser

optManager  = DbsOptionParser()
(opts,args) = optManager.getOpt()
api = DbsApi(opts.__dict__)

try :
    print("Files to process:")
    for afile in api.listDatasetFiles(datasetPath=sampleName):
        process.source.fileNames.append(afile['LogicalFileName'])
        print(afile['LogicalFileName'])

except DbsApiException as ex:
     print("Caught API Exception %s: %s "  % (ex.getClassName(), ex.getErrorMessage() ))
     if ex.getErrorCode() not in (None, ""):
          print("DBS Exception Error Code: ", ex.getErrorCode())