""" bank11: The bank with a Monitor"""
from SimPy.Simulation import *
from random import expovariate,seed
## Model components ------------------------
class Source(Process):
""" Source generates customers randomly"""
def generate(self,number,interval,resource):
for i in range(number):
c = Customer(name = "Customer%02d"%(i,),sim=self.sim)
self.sim.activate(c,c.visit(b=resource))
t = expovariate(1.0/interval)
yield hold,self,t
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self,b):
arrive = self.sim.now()
yield request,self,b
wait = self.sim.now()-arrive
self.sim.wM.observe(wait)
tib = expovariate(1.0/timeInBank)
yield hold,self,tib
yield release,self,b
## Experiment data -------------------------
maxNumber = 50
maxTime = 1000.0 # minutes
timeInBank = 12.0 # mean, minutes
ARRint = 10.0 # mean, minutes
Nc = 2 # number of counters
theseed = 12345
## Model -----------------------------------
class BankModel(Simulation):
def run(self):
self.initialize()
k = Resource(capacity=Nc,name="Clerk",sim=self)
self.wM = Monitor(sim=self)
s = Source('Source',sim=self)
self.activate(s,s.generate(number=maxNumber,interval=ARRint,
resource=k),at=0.0)
self.simulate(until=maxTime)
## Experiment -----------------------------
seed(theseed)
experi=BankModel()
experi.run()
## Result ----------------------------------
result = experi.wM.count(),experi.wM.mean()
print "Average wait for %3d completions was %5.3f minutes."% result
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