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""" 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))
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 = now()
yield request, self, b
wait = now() - arrive
wM.observe(wait) # (1)
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 = 99999
## Model/Experiment ----------------------
seed(theseed)
k = Resource(capacity=Nc, name="Clerk")
wM = Monitor() # (2)
initialize()
s = Source('Source')
activate(s, s.generate(number=maxNumber, interval=ARRint,
resource=k), at=0.0) # (3)
simulate(until=maxTime)
## Result ----------------------------------
result = wM.count(), wM.mean() # (4)
print("Average wait for %3d completions was %5.3f minutes." % result)
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