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from SimPy.Simulation import (Process, Resource, activate, initialize, hold,
now, release, request, simulate)
class Client(Process):
inClients = [] # list the clients in order by their requests
outClients = [] # list the clients in order by completion of service
def __init__(self, name):
Process.__init__(self, name)
def getserved(self, servtime, priority, myServer):
Client.inClients.append(self.name)
print('%s requests 1 unit at t = %s' % (self.name, now()))
# request use of a resource unit
yield request, self, myServer, priority
yield hold, self, servtime
# release the resource
yield release, self, myServer
print('%s done at t = %s' % (self.name, now()))
Client.outClients.append(self.name)
initialize()
# the next line creates the ``server`` Resource object
server = Resource(capacity=2) # server defaults to qType==FIFO
# the next lines create some Client process objects
c1, c2 = Client(name='c1'), Client(name='c2')
c3, c4 = Client(name='c3'), Client(name='c4')
c5, c6 = Client(name='c5'), Client(name='c6')
# in the next lines each client requests
# one of the ``server``'s Resource units
activate(c1, c1.getserved(servtime=100, priority=1, myServer=server))
activate(c2, c2.getserved(servtime=100, priority=2, myServer=server))
activate(c3, c3.getserved(servtime=100, priority=3, myServer=server))
activate(c4, c4.getserved(servtime=100, priority=4, myServer=server))
activate(c5, c5.getserved(servtime=100, priority=5, myServer=server))
activate(c6, c6.getserved(servtime=100, priority=6, myServer=server))
simulate(until=500)
print('Request order: %s' % Client.inClients)
print('Service order: %s' % Client.outClients)
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