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"""bank14: *waituntil* the Bank door opens"""
from SimPy.Simulation import *
from random import expovariate, seed
## Model components ------------------------
door = 'Shut'
def dooropen():
return door == 'Open'
class Doorman(Process):
""" Doorman opens the door"""
def openthedoor(self):
""" He will open the door when he arrives"""
global door
yield hold, self, expovariate(1.0 / 10.0)
door = 'Open'
print("%7.4f Doorman: Ladies and "\
"Gentlemen! You may all enter." % (now()))
class Source(Process):
""" Source generates customers randomly"""
def generate(self, number, rate):
for i in range(number):
c = Customer(name="Customer%02d" % (i))
activate(c, c.visit(timeInBank=12.0))
yield hold, self, expovariate(rate)
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self, timeInBank=10):
arrive = now()
if dooropen():
msg = ' and the door is open.'
else:
msg = ' but the door is shut.'
print("%7.4f %s: Here I am%s" % (now(), self.name, msg))
yield waituntil, self, dooropen
print("%7.4f %s: I can go in!" % (now(), self.name))
wait = now() - arrive
print("%7.4f %s: Waited %6.3f" % (now(), self.name, wait))
yield request, self, counter
tib = expovariate(1.0 / timeInBank)
yield hold, self, tib
yield release, self, counter
print("%7.4f %s: Finished " % (now(), self.name))
## Experiment data -------------------------
maxTime = 2000.0 # minutes
counter = Resource(1, name="Clerk")
## Model ----------------------------------
def model(SEED=393939):
seed(SEED)
initialize()
door = 'Shut'
doorman = Doorman()
activate(doorman, doorman.openthedoor())
source = Source()
activate(source,
source.generate(number=5, rate=0.1), at=0.0)
simulate(until=400.0)
## Experiment ----------------------------------
model()
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