MMc with state.py

import salabim as sim


class Server(sim.Component):
    def process(self):
        while True:
            if not waiting_clients:
                yield self.wait(work_to_do)
            this_client = waiting_clients.pop()
            yield self.hold(sim.Exponential(server_time).sample())
            this_client.activate()


class Client(sim.Component):

    def process(self):
        self.enter(waiting_clients)
        work_to_do.trigger(max=1)
        yield self.passivate()


class ClientGenerator(sim.Component):
    def process(self):
        while True:
            yield self.hold(sim.Exponential(iat).sample())
            Client()


env = sim.Environment(trace=True)

waiting_clients = sim.Queue('waiting_clients')
work_to_do = sim.State('work_to_do')

nservers = 5
iat = 1
server_time = 4

for i in range(nservers):
    Server()

ClientGenerator(name='clientgenerator')

env.run(100)