| import simpy |
| from modules.process.random_delay import delay |
|
|
| class Crane(simpy.Resource): |
| """ This class represents the cranes. They transport one item at a time. """ |
| def __init__(self, name, duration, logger, env, debug=True): |
| super(Crane, self).__init__(env, capacity=1) |
| self.debug = debug |
| self.duration = duration |
| self.queue = 0 |
| self.logger = logger |
| self.name = name |
| self.state = "waiting" |
| self.env = env |
|
|
| def process(self): |
| if self.debug: |
| print(self.name + ": input") |
| self.queue = self.queue + 1 |
| with self.request() as req: |
| yield req |
| if self.debug: |
| print(self.name + ": go_forward") |
| self.logger.addMessage(self.name + " FORWARD"); |
| self.queue = self.queue - 1 |
| self.state = "running" |
| yield self.env.timeout(delay(self.duration, 1)) |
| if self.debug: |
| print(self.name + ": wait") |
| self.state = "waiting" |
| if self.debug: |
| print(self.name + ": item_taken") |
| print(self.name + ": go_back") |
| self.logger.addMessage(self.name + " BACKWARD"); |
| yield self.env.timeout(delay(self.duration, 1)) |
| if self.debug: |
| print(self.name + ": stop") |
| self.logger.addMessage(self.name + " STOP"); |
| return |
|
|
| def spawn(self): |
| return self.env.process(self.process()) |
|
|
| def get_events(self): |
| return [self.name + " FORWARD", self.name + " BACKWARD", |
| self.name + " STOP"] |
|
|
