"""bank15_OO: Monitoring a Resource"""
from SimPy.Simulation import *
from random import *
## Model components ------------------------
class Source(Process):
""" Source generates customers randomly"""
def generate(self,number,rate):
for i in range(number):
c = Customer(name = "Customer%02d"%(i,),sim=self.sim)
self.sim.activate(c,c.visit(timeInBank=12.0,counter=self.sim.counter))
yield hold,self,expovariate(rate)
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self,timeInBank,counter):
arrive=now()
print "%8.4f %s: Arrived "%(self.sim.now(),self.name)
yield request,self,counter
print "%8.4f %s: Got counter "%(self.sim.now(),self.name)
tib = expovariate(1.0/timeInBank)
yield hold,self,tib
yield release,self,counter
print "%8.4f %s: Finished "%(self.sim.now(),self.name)
## Experiment data -------------------------
maxTime = 400.0 # minutes
## Model ----------------------------------
class BankModel(Simulation):
def run(self):
self.initialize()
self.counter = Resource(capacity=1,name="Clerk",monitored=True,sim=self)
source = Source(sim=self)
self.activate(source,
source.generate(number=5,rate=0.1),at=0.0)
self.simulate(until=maxTime)
return (self.counter.waitMon.timeAverage(),self.counter.actMon.timeAverage())
## Experiment ----------------------------------
seed(393939)
print 'Average waiting = %6.4f\nAverage active = %6.4f\n'%BankModel().run()
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