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""" bank08_OO
A counter with a random service time
and customers who renege. Based on the program bank08.py
from TheBank tutorial. (KGM)
"""
from SimPy.Simulation import *
from random import expovariate, seed, uniform
## Model components ------------------------
class Source(Process):
""" Source generates customers randomly"""
def generate(self,number,interval,counter):
for i in range(number):
c = Customer(name = "Customer%02d"%(i,),sim=self.sim)
self.sim.activate(c,c.visit(counter,timeInBank=12.0))
t = expovariate(1.0/interval)
yield hold,self,t
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self,counter,timeInBank=0):
arrive = self.sim.now()
print "%7.4f %s: Here I am "%(self.sim.now(),self.name)
yield (request,self,counter),(hold,self,Customer.patience())
if self.acquired(counter):
wait = self.sim.now()-arrive
print "%7.4f %s: Waited %6.3f"%(self.sim.now(),self.name,wait)
tib = expovariate(1.0/timeInBank)
yield hold,self,tib
yield release,self,counter
print "%7.4f %s: Finished"%(self.sim.now(),self.name)
else:
wait = self.sim.now()-arrive
print "%7.4f %s: RENEGED after %6.3f"%(self.sim.now(),self.name,wait)
def fpatience(minpatience=0,maxpatience=10000000000):
while True:
yield uniform(minpatience,maxpatience)
fpatience=staticmethod(fpatience)
## Model ---------------------------------------------
class BankModel(Simulation):
def run(self):
self.initialize()
counter = Resource(name="Karen",sim=self)
pat = Customer.fpatience(minpatience=1,maxpatience=3)
Customer.patience=pat.next
source = Source(name='Source',sim=self)
self.activate(source,source.generate(NumCustomers,
interval=IntervalCustomers,
counter=counter))
self.simulate(until=maxTime)
## Experiment data -------------------------
maxTime = 400.0
theseed = 12345
NumCustomers = 5
IntervalCustomers = 10.0
## Experiment ------------------------------
seed(theseed)
print 'bank08_OO_renege'
BankModel().run()
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