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import FWCore.ParameterSet.Config as cms
process = cms.Process("TEST")
process.load("FWCore.MessageService.MessageLogger_cfi")
process.MessageLogger.cerr.FwkReport.reportEvery = 1
from FWCore.Modules.modules import EmptySource
process.source = EmptySource()
process.maxEvents.input = 20
# accept one event out of two
from FWCore.Modules.modules import Prescaler
process.filter = Prescaler(
prescaleFactor = 2,
prescaleOffset = 0
)
# produce a PathStateToken when run, to indicate that its path is active for the current event
from FWCore.Modules.modules import PathStateCapture
process.pathStateCapture = PathStateCapture()
# try to consume a PathStateToken: if it is found accept the event, otherwise reject it
from FWCore.Modules.modules import PathStateRelease
process.pathStateRelease = PathStateRelease(
state = 'pathStateCapture'
)
# select one event out of two and record the path's activity
process.captured = cms.Path(
process.filter +
process.pathStateCapture
)
# replicate the activity of the original path
process.released = cms.Path(
process.pathStateRelease
)
# compare the results of the "captured" and "released" paths
from FWCore.Modules.modules import PathStatusFilter
process.compare = PathStatusFilter(
logicalExpression = '(captured and released) or (not captured and not released)'
)
# schedule the comparison
process.correct = cms.Path(
process.compare
)
# require that the comparison has been successful for every event
from FWCore.Framework.modules import SewerModule
process.require = SewerModule(
name = cms.string('require'),
shouldPass = process.maxEvents.input.value(),
SelectEvents = dict(
SelectEvents = 'correct'
)
)
process.endpath = cms.EndPath(
process.require
)
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