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"""bank15_OO: Monitoring a Resource"""
from SimPy.Simulation import Simulation, Process, Resource, Monitor, hold, request, release
from random import *
## Model components ------------------------
class Source(Process):
""" Source generates customers randomly"""
def generate(self, number, rate):
for i in range(number):
c = Customer(name="Customer%02d" % (i), sim=self.sim)
self.sim.activate(c, c.visit(timeInBank=12.0, counter=self.sim.counter))
yield hold, self, expovariate(rate)
class Customer(Process):
""" Customer arrives, is served and leaves """
def visit(self, timeInBank, counter):
arrive = self.sim.now()
print("%8.4f %s: Arrived " % (self.sim.now(), self.name))
yield request, self, counter
print("%8.4f %s: Got counter " % (self.sim.now(), self.name))
tib = expovariate(1.0 / timeInBank)
yield hold, self, tib
yield release, self, counter
print("%8.4f %s: Finished " % (self.sim.now(), self.name))
## Model ----------------------------------
class BankModel(Simulation):
def run(self, aseed):
""" PEM """
seed(aseed)
self.counter = Resource(capacity=1, name="Clerk", monitored=True, sim=self)
source = Source(sim=self)
self.activate(source,
source.generate(number=5, rate=0.1), at=0.0)
self.simulate(until=maxTime)
return
## Experiment data -------------------------
maxTime = 400.0 # minutes
seedVal = 393939
## Experiment ----------------------------------
modl = BankModel()
modl.run(aseed=seedVal)
nrwaiting = modl.counter.waitMon.timeAverage()
nractive = modl.counter.actMon.timeAverage()
print('Average waiting = %6.4f\nAverage active = %6.4f\n' % (nrwaiting, nractive))
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