"""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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