In This Package:

__init__.py

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#!/usr/bin/env python

__all__ = ['DybAlgConf','Configure','RandomSeeder']

# Dummy place holder for now
class Configure:pass

class RandomSeeder:
    '''Random seed algorithm config'''

    def __init__(self,hostid=0,run=0,execcountoffset=0,burncount=1000,
                 engine="HepRndm::Engine<CLHEP::Ranlux64Engine>",):
        '''Do default configuration of the random seeds, optionally
        setting hostid, run, execcountoffset, burncount or random engine'''

        if hostid&0xffff0000 == int("0x007f0000",16):
            print '''
WARNING:  Your hostID corresponds to a localhost/loopback IP number.
This is not very unique and you may sharing random seeds
with other processing nodes.
Check /etc/hosts to make sure your host has a real IP address.
'''
        pass


        from Gaudi.Configuration import ApplicationMgr
        theApp = ApplicationMgr()

        from GaudiSvc.GaudiSvcConf import RndmGenSvc
        rndSvc = RndmGenSvc()
        rndSvc.Engine = engine
        theApp.ExtSvc.append(rndSvc)

        def munge(x):
            if x == ':' or x == '<' or x == '>': return '_'
            return x
        engModName = ''.join(map(munge,engine))
        exec('from GaudiSvc.GaudiSvcConf import %s'%engModName)
        engMod = eval(engModName)
        engMod = engMod('RndmGenSvc.Engine') # magic nickname
        engMod.SetSingleton = True
        #print 'SetSingleton to True for engine %s (%s)'%(engine,engModName)

        from DybAlg.DybAlgConf import DybShuffle
        self.random_seeder = DybShuffle("random_seeder")
        # truncate hostid to avoid type mismatches.
        self.random_seeder.HostID = hostid&0x7fffffff
        self.random_seeder.Run = run
        self.random_seeder.ExecCountOffset = execcountoffset        
        self.random_seeder.BurnCount = burncount
        theApp.TopAlg.append(self.random_seeder)
        return

    pass # end RandomSeeder

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