""" bank13: Wait for the doorman to give a signal: *waitevent*"""
from SimPy.Simulation import *
from random import *
## Model components ------------------------
dooropen=SimEvent("Door Open")
class Doorman(Process):
""" Doorman opens the door"""
def openthedoor(self):
""" He will opens the door at fixed intervals"""
for i in range(5):
yield hold,self, 30.0
dooropen.signal()
print "%7.4f You may 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.occurred:
msg = '.'
else:
msg = ' but the door is shut.'
print "%7.4f %s: Here I am%s"%(now(),self.name,msg)
yield waitevent,self,dooropen
print "%7.4f %s: The door is open!"%(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 = 400.0 # minutes
counter = Resource(1,name="Clerk")
## Model ----------------------------------
def model(SEED=393939):
seed(SEED)
initialize()
doorman = Doorman()
activate(doorman,doorman.openthedoor())
source = Source()
activate(source,
source.generate(number=5,rate=0.1),at=0.0)
simulate(until=maxTime)
## Experiment ----------------------------------
model()
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