""" bank20: One counter with a priority customer """
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(timeInBank=12.0,
res=resource,P=0))
t = expovariate(1.0/interval)
yield hold,self,t
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self,timeInBank=0,res=None,P=0):
arrive = now() # arrival time
Nwaiting = len(res.waitQ)
print "%8.3f %s: Queue is %d on arrival"%(now(),self.name,Nwaiting)
yield request,self,res,P
wait = now()-arrive # waiting time
print "%8.3f %s: Waited %6.3f"%(now(),self.name,wait)
yield hold,self,timeInBank
yield release,self,res
print "%8.3f %s: Completed"%(now(),self.name)
## Experiment data -------------------------
maxTime = 400.0 # minutes
k = Resource(name="Counter",unitName="Karen",
qType=PriorityQ)
## Model/Experiment ------------------------------
seed(98989)
initialize()
s = Source('Source')
activate(s,s.generate(number=5, interval=10.0,
resource=k),at=0.0)
guido = Customer(name="Guido ")
activate(guido,guido.visit(timeInBank=12.0,res=k,
P=100),at=23.0)
simulate(until=maxTime)
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