WriteAthenaRoot.py

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# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 
# @file AthenaRootComps/python/WriteAthenaRoot.py
# @purpose make the Athena framework write a set of ROOT files
# @author Sebastien Binet <binet@cern.ch>
# 
 
 
from AthenaRootComps.Configurables import createNtupleOutputStream
 
 
__all__ = [ 'createNtupleOutputStream' ]
 
def _configureWriteAthenaRoot():
    """ Helper method to configure Athena to write out ROOT files """
 
    from AthenaCommon.Logging import logging
    msg = logging.getLogger( 'configureWriteAthenaRoot' )
    msg.debug( "Configuring Athena for writing ROOT files..." )
 
    # Load the basic services
    import AthenaRootComps.AthenaRootBase  # noqa: F401
 
    '''
    from AthenaCommon.AppMgr  import ServiceMgr as svcMgr
    # Switch off splitting by setting default SplitLevel to 0
    svcMgr.AthenaPoolCnvSvc.PoolAttributes += [ "DEFAULT_SPLITLEVEL ='0'" ]
    # Set as default the member-wise streaming, ROOT default
    svcMgr.AthenaPoolCnvSvc.PoolAttributes += [ "STREAM_MEMBER_WISE = '1'" ]
 
    # Increase default BasketSize to 32K, ROOT default (but overwritten by POOL)
    svcMgr.AthenaPoolCnvSvc.PoolAttributes += [ "DEFAULT_BUFFERSIZE = '32000'" ]
 
    # Turn off auto_flush for DataHeader container to avoid basket optimization
    svcMgr.AthenaPoolCnvSvc.PoolAttributes += [ "ContainerName = 'POOLContainer_DataHeader_p5'; TREE_AUTO_FLUSH = '0'" ]
    svcMgr.AthenaPoolCnvSvc.PoolAttributes += [ "ContainerName = 'POOLContainer_DataHeaderForm_p5'; TREE_AUTO_FLUSH = '0'" ]
    '''
    
    msg.debug( "Configuring Athena for writing ROOT files... [DONE]" )
    return
 
 
_configureWriteAthenaRoot()
 
 
del _configureWriteAthenaRoot