嗨，我有一些代码，其中包括发布/订阅和演员。 generic_device类允许我创建其他参与者。我想知道当我订阅主题时如何从generic_device类创建特定的actor，如果未订阅该主题，那么就不会从generic_device类创建actor。目前，仅当收到特定消息时，便创建了参与者。所有帮助表示感谢。
import logging
from datetime import timedelta
import time
from thespian.actors import *
from transitions import Machine
import paho.mqtt.client as mqtt
class laser(mqtt.Client):
def on_connect(self, mqttc, obj, flags, rc):
print("rc: "+str(rc))
def on_message(self, mqttc, userdata, message):
print("message received " ,str(message.payload.decode("utf-8")))
print("message topic=",message.topic)
print("message qos=",message.qos)
print("message retain flag=",message.retain)
def on_publish(self, mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(self, mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(self, mqttc, userdata, level, buf):
print("log: ",buf)
def run(self):
self.connect("broker.hivemq.com", 1883, 60)
print("creating new instance")
client = laser("Laser")
client.run()
client.loop_start() #start the loop
time.sleep(2)
print("Publishing message to topic","microscope/light_sheet_microscope/UI/laser")
client.publish("microscope/light_sheet_microscope/UI/laser","Hello World Im a laser!")
time.sleep(2) # wai
client.loop_stop() #stop the loop
class motorized_mirror_galvo(mqtt.Client):
def on_connect(self, mqttc, obj, flags, rc):
print("rc: "+str(rc))
def on_message(self, mqttc, userdata, message):
print("message received " ,str(message.payload.decode("utf-8")))
print("message topic=",message.topic)
print("message qos=",message.qos)
print("message retain flag=",message.retain)
def on_publish(self, mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(self, mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(self, mqttc, userdata, level, buf):
print("log: ",buf)
def run(self):
self.connect("broker.hivemq.com", 1883, 60)
print("creating new instance")
client = motorized_mirror_galvo("Motorized mirror galvo")
client.run()
client.loop_start() #start the loop
time.sleep(2)
print("Publishing message to topic","microscope/light_sheet_microscope/UI/motorized_mirror_galvo")
client.publish("microscope/light_sheet_microscope/UI/motorized_mirror_galvo","Hello World Im a motorized mirror galvo!")
time.sleep(2) # wait
client.loop_stop() #stop the loop
class stages(mqtt.Client):
def on_connect(self, mqttc, obj, flags, rc):
print("rc: "+str(rc))
def on_message(self, mqttc, userdata, message):
print("message received " ,str(message.payload.decode("utf-8")))
print("message topic=",message.topic)
print("message qos=",message.qos)
print("message retain flag=",message.retain)
def on_publish(self, mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(self, mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(self, mqttc, userdata, level, buf):
print("log: ",buf)
def run(self):
self.connect("broker.hivemq.com", 1883, 60)
print("creating new instance")
client = stages("Stages")
client.run()
client.loop_start() #start the loop
time.sleep(2)
print("Publishing message to topic","microscope/light_sheet_microscope/UI/stages")
client.publish("microscope/light_sheet_microscope/UI/stages","Hello World Im a stage!")
time.sleep(2) # wait
client.loop_stop() #stop the loop
class cameras(mqtt.Client):
def on_connect(self, mqttc, obj, flags, rc):
print("rc: "+str(rc))
def on_message(self, mqttc, userdata, message):
print("message received " ,str(message.payload.decode("utf-8")))
print("message topic=",message.topic)
print("message qos=",message.qos)
print("message retain flag=",message.retain)
def on_publish(self, mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(self, mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(self, mqttc, userdata, level, buf):
print("log: ",buf)
def run(self):
self.connect("broker.hivemq.com", 1883, 60)
print("creating new instance")
client = cameras("Cameras")
client.run()
client.loop_start() #start the loop
time.sleep(2)
print("Publishing message to topic","microscope/light_sheet_microscope/UI/cameras")
client.publish("microscope/light_sheet_microscope/UI/cameras","Hello World Im a camera!")
time.sleep(2) # wait
client.loop_stop() #stop the loop
class filter_wheel(mqtt.Client):
def on_connect(self, mqttc, obj, flags, rc):
print("rc: "+str(rc))
print("Subscribing to topic","microscope/light_sheet_microscope/UI/filter_wheel")
mqttc.subscribe("microscope/light_sheet_microscope/UI/filter_wheel")
def on_message(self, mqttc, userdata, message):
print("message received " ,str(message.payload.decode("utf-8")))
print("message topic=",message.topic)
print("message qos=",message.qos)
print("message retain flag=",message.retain)
def on_publish(self, mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(self, mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(self, mqttc, userdata, level, buf):
print("log: ",buf)
def run(self):
self.connect("broker.hivemq.com", 1883, 60)
print("creating new instance")
client = filter_wheel("Filter wheel")
client.run()
client.loop_start() #start the loop
time.sleep(2)
print("Publishing message to topic","microscope/light_sheet_microscope/UI/filter_wheel")
client.publish("microscope/light_sheet_microscope/UI/filter_wheel","Hello World Im a Filter Wheel!")
time.sleep(2) # wait
client.loop_stop() #stop the loop
class State(object):
"""
We define a state object which provides some utility functions for the
individual states within the state machine.
"""
def __init__(self):
print("Current state: ", str(self))
def on_event(self, event):
"""
Handle events that are delegated to this State.
"""
pass
def __repr__(self):
"""
Leverages the __str__ method to describe the State.
"""
return self.__str__()
def __str__(self):
"""
Returns the name of the State.
"""
return self.__class__.__name__
# Start of our states
class UninitialisedState(State):
"""
The uninitialised state.
"""
def on_event(self, event):
if event == 'Initialised':
return InitialisedState()
return self
class InitialisedState(State):
"""
The initialised state.
"""
def on_event(self, event):
if event == "Configured":
return ConfiguredState()
return self
class ConfiguredState(State):
"""
The configured state.
"""
def on_event(self, event):
if event == "Running":
return RunningState()
return self
class RunningState(State):
"""
The running state.
"""
def on_event(self, event):
if event == "Stop":
return UninitialisedState()
return self
class SimpleDevice(object):
"""
A simple state machine that mimics the functionality of a device from a
high level.
"""
def __init__(self):
""" Initialise the components. """
# Start with a default state.
self.state = UninitialisedState()
def on_event(self, event):
"""
This is the bread and butter of the state machine. Incoming events are
delegated to the given states which then handle the event. The result is
then assigned as the new state.
"""
# The next state will be the result of the on_event function.
self.state = self.state.on_event(event)
device = SimpleDevice()
""" Shelf class """
class Shelf(dict):
def __setitem__(self, key, item):
self.__dict__[key] = item
def __getitem__(self, key):
return self.__dict__[key]
def __repr__(self):
return repr(self.__dict__)
def __len__(self):
return len(self.__dict__)
def __delitem__(self, key):
del self.__dict__[key]
def clear(self):
return self.__dict__.clear()
def copy(self):
return self.__dict__.copy()
def has_key(self, k):
return k in self.__dict__
def update(self, *args, **kwargs):
return self.__dict__.update(*args, **kwargs)
def keys(self):
return self.__dict__.keys()
def values(self):
return self.__dict__.values()
def items(self):
return self.__dict__.items()
def pop(self, *args):
return self.__dict__.pop(*args)
def __cmp__(self, dict_):
return self.__cmp__(self.__dict__, dict_)
def __contains__(self, item):
return item in self.__dict__
def __iter__(self):
return iter(self.__dict__)
def __unicode__(self):
return unicode(repr(self.__dict__))
s = Shelf()
s.shelf = "GFP"
print(s)
class Generic_device(mqtt.Client, Actor):
def on_connect(self, mqttc, obj, flags, rc):
print("rc: "+str(rc))
print("Subscribing to topic","microscope/light_sheet_microscope/UI/laser")
print("Subscribing to topic","microscope/light_sheet_microscope/UI/motorized_mirror_galvo")
print("Subscribing to topic","microscope/light_sheet_microscope/UI/stages")
print("Subscribing to topic","microscope/light_sheet_microscope/UI/cameras")
print("Subscribing to topic","microscope/light_sheet_microscope/UI/filter_wheel")
mqttc.subscribe("microscope/light_sheet_microscope/UI/laser")
mqttc.subscribe("microscope/light_sheet_microscope/UI/motorized_mirror_galvo")
mqttc.subscribe("microscope/light_sheet_microscope/UI/stages")
mqttc.subscribe("microscope/light_sheet_microscope/UI/cameras")
mqttc.subscribe("microscope/light_sheet_microscope/UI/filter_wheel")
def on_message(self, mqttc, userdata, message):
print("message received " ,str(message.payload.decode("utf-8")))
print("message topic=",message.topic)
print("message qos=",message.qos)
print("message retain flag=",message.retain)
def on_publish(self, mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(self, mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(self, mqttc, userdata, level, buf):
print("log: ",buf)
def run(self):
self.connect("broker.hivemq.com", 1883, 60)
def receiveMessage(self, message, sender):
if message == "'Subscribing to topic','microscope/light_sheet_microscope/UI/laser'":
laser = self.createActor(Laser)
lasermsg = (sender, 'Laser')
self.send(laser, lasermsg)
if message == "'Subscribing to topic','microscope/light_sheet_microscope/UI/motorized_mirror_galvo'":
galvo = self.createActor(Galvo)
galvomsg = (sender, 'Galvo')
self.send(galvo, galvomsg)
if message == "'Subscribing to topic','microscope/light_sheet_microscope/UI/stages'":
stages = self.createActor(Stages)
stagesmsg = (sender, 'Stages')
self.send(stages, stagesmsg)
if message == "'Subscribing to topic','microscope/light_sheet_microscope/UI/cameras'":
cameras = self.createActor(Cameras)
camerasmsg = (sender, 'Cameras')
self.send(cameras, camerasmsg)
if message == "'Subscribing to topic','microscope/light_sheet_microscope/UI/filter_wheel'":
filter_wheel = self.createActor(Filter_wheel)
filter_wheelmsg = (sender, 'Filter wheel')
self.send(filter_wheel, filter_wheelmsg)
print("creating new instance")
client = Generic_device("Laser")
client.run()
client.loop_start() #start the loop
time.sleep(2) # wait
client.loop_stop() #stop the loop
class Laser(Actor):
def receiveMessage(self, message, sender):
if isinstance(message, tuple):
orig_sender, pre_laser = message
self.send(orig_sender, pre_laser + ' actor created')
class Galvo(Actor):
def receiveMessage(self, message, sender):
if isinstance(message, tuple):
orig_sender, pre_galvo = message
self.send(orig_sender, pre_galvo + ' actor created')
class Stages(Actor):
def receiveMessage(self, message, sender):
if isinstance(message, tuple):
orig_sender, pre_galvo = message
self.send(orig_sender, pre_galvo + ' actor created')
class Cameras(Actor):
def receiveMessage(self, message, sender):
if isinstance(message, tuple):
orig_sender, pre_cameras = message
self.send(orig_sender, pre_cameras + ' actor created')
class Filter_wheel(Actor):
def receiveMessage(self, message, sender):
if isinstance(message, tuple):
orig_sender, pre_filter_wheel = message
self.send(orig_sender, pre_filter_wheel + ' actor created')
def run_example(systembase=None):
generic_device = ActorSystem().createActor(Generic_device)
laser = ActorSystem().ask(generic_device, "'Subscribing to topic','microscope/light_sheet_microscope/UI/laser'", 1.5)
print(laser)
galvo = ActorSystem().ask(generic_device, "'Subscribing to topic','microscope/light_sheet_microscope/UI/motorized_mirror_galvo'", 1.5)
print(galvo)
stages = ActorSystem().ask(generic_device, "'Subscribing to topic','microscope/light_sheet_microscope/UI/stages'", 1.5)
print(stages)
cameras = ActorSystem().ask(generic_device, "'Subscribing to topic','microscope/light_sheet_microscope/UI/cameras'", 1.5)
print(cameras)
filter_wheel = ActorSystem().ask(generic_device, "'Subscribing to topic','microscope/light_sheet_microscope/UI/filter_wheel'", 1.5)
print(filter_wheel)
ActorSystem().shutdown()
if __name__ == "__main__":
import sys
run_example(sys.argv[1] if len(sys.argv) > 1 else None)
Thanks