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""" bank07: One Counter,random arrivals """
from SimPy.Simulation import *
from random import expovariate, seed
## Model components ------------------------
class Source(Process):
""" Source generates customers randomly """
def generate(self, number, meanTBA, resource):
for i in range(number):
c = Customer(name="Customer%02d" % (i))
activate(c, c.visit(timeInBank=12.0,
res=resource)) # (1)
t = expovariate(1.0 / meanTBA)
yield hold, self, t
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self, timeInBank, res):
arrive = now() # (2) arrival time
print("%8.3f %s: Here I am" % (now(), self.name))
yield request, self, res # (3)
wait = now() - arrive # (4) waiting time
print("%8.3f %s: Waited %6.3f" % (now(), self.name, wait))
yield hold, self, timeInBank # (5)
yield release, self, res # (6)
print("%8.3f %s: Finished" % (now(), self.name))
## Experiment data -------------------------
maxNumber = 5 # (7)
maxTime = 400.0 # minutes
ARRint = 10.0 # mean, minutes
k = Resource(name="Counter", unitName="Clerk") # (8)
## Model/Experiment ------------------------------
seed(99999)
initialize()
s = Source('Source')
activate(s, s.generate(number=maxNumber,
meanTBA=ARRint, resource=k), at=0.0) # (9)
simulate(until=maxTime)
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