""" bank21_OO: One counter with impatient customers """
from SimPy.Simulation import *
from random import expovariate,seed
## Model components ------------------------
class Source(Process):
""" Source generates customers randomly """
def generate(self,number,interval):
for i in range(number):
c = Customer(name = "Customer%02d"%(i,),sim=self.sim)
self.sim.activate(c,c.visit(timeInBank=15.0))
t = expovariate(1.0/interval)
yield hold,self,t
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self,timeInBank=0):
arrive = self.sim.now() # arrival time
print "%8.3f %s: Here I am "%(self.sim.now(),self.name)
yield (request,self,self.sim.counter),(hold,self,maxWaitTime)
wait = self.sim.now()-arrive # waiting time
if self.acquired(self.sim.counter):
print "%8.3f %s: Waited %6.3f"%(self.sim.now(),self.name,wait)
yield hold,self,timeInBank
yield release,self,self.sim.counter
print "%8.3f %s: Completed"%(self.sim.now(),self.name)
else:
print "%8.3f %s: Waited %6.3f. I am off"%(self.sim.now(),self.name,wait)
## Experiment data -------------------------
maxTime = 400.0 # minutes
maxWaitTime = 12.0 # minutes. maximum time to wait
## Model ----------------------------------
class BankModel(Simulation):
def run(self):
initialize()
self.counter = Resource(name="Karen",sim=self)
source = Source('Source',sim=self)
self.activate(source,
source.generate(number=5, interval=10.0),at=0.0)
self.simulate(until=maxTime)
## Experiment ----------------------------------
seed(98989)
BankModel().run()
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