WriteAndReadHandleWhiteBoard.py

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from Configurables import AvalancheSchedulerSvc
from Configurables import Gaudi__RootCnvSvc as RootCnvSvc
from Configurables import (
    GaudiPersistency,
    HiveSlimEventLoopMgr,
    HiveWhiteBoard,
    ReadHandleAlg,
    WriteHandleAlg,
)
from Gaudi.Configuration import *
 
# Output setup
# - DST
dst = OutputStream("RootDst")
 
dst.ItemList = ["/Event#999"]
dst.Output = (
    "DATAFILE='PFN:HandleWB_ROOTIO.dst'  SVC='Gaudi::RootCnvSvc' OPT='RECREATE'"
)
 
# - MiniDST
mini = OutputStream("RootMini")
mini.ItemList = ["/Event#1"]
mini.Output = (
    "DATAFILE='PFN:HandleWB_ROOTIO.mdst' SVC='Gaudi::RootCnvSvc' OPT='RECREATE'"
)
mini.OutputLevel = VERBOSE
 
# - File Summary Record
fsr = RecordStream("FileRecords")
fsr.ItemList = ["/FileRecords#999"]
fsr.Output = dst.Output
fsr.EvtDataSvc = FileRecordDataSvc()
fsr.EvtConversionSvc = FileRecordPersistencySvc()
 
FileCatalog(Catalogs=["xmlcatalog_file:HandleWB_ROOTIO.xml"])
 
# Output Levels
MessageSvc(OutputLevel=WARNING)
IncidentSvc(OutputLevel=DEBUG)
RootCnvSvc(OutputLevel=INFO)
 
GaudiPersistency()
 
product_name = "/Event/MyCollision"
 
writer = WriteHandleAlg("Writer", OutputLevel=DEBUG, UseHandle=True)
writer.Output.Path = product_name
 
reader = ReadHandleAlg("Reader", OutputLevel=DEBUG)
reader.Input.Path = product_name
 
evtslots = 15
algoparallel = 10
 
whiteboard = HiveWhiteBoard("EventDataSvc", EventSlots=evtslots)
 
slimeventloopmgr = HiveSlimEventLoopMgr()
 
scheduler = AvalancheSchedulerSvc(ThreadPoolSize=algoparallel, OutputLevel=WARNING)
 
# Application setup
app = ApplicationMgr()
# - I/O
# Do not put them here, but as normal algorithms.
# Putting two of them in the top alg list will not work if more than one
# algo is allowed to be in flight: at some point they will write to disk
# simultaneously, with catastrophic effects.
 
# app.OutStream += [ mini ]
# - Algorithms
app.TopAlg = [writer, reader, mini]
# - Events
app.EvtMax = 50
app.EvtSel = "NONE"  # do not use any event input
app.HistogramPersistency = "NONE"
app.ExtSvc = [whiteboard]
app.EventLoop = slimeventloopmgr