-
Notifications
You must be signed in to change notification settings - Fork 17
Expand file tree
/
Copy pathevent.py
More file actions
48 lines (39 loc) · 1.54 KB
/
event.py
File metadata and controls
48 lines (39 loc) · 1.54 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
import threading
from event_channel.threaded_event_channel import ThreadedEventChannel
class EventManager(object):
_instance = None
@classmethod
def get_instance(cls, node_name=None):
if cls._instance is None and node_name is not None:
cls._instance = EventManager(node_name)
return cls._instance
def __init__(self, node_name):
self._channel = ThreadedEventChannel(blocking=False)
self._publisher_threads = None
self._subscribers = []
self._node_name = node_name
self._event_generators = []
def publish(self, topic, msg):
self._publisher_threads = self._channel.publish(topic, msg)
def register_event_listener(self, topic, callback):
self._channel.subscribe(topic, callback)
self._subscribers.append((topic, callback))
def register_event_generator(self, generator_func):
generator = threading.Thread(target=generator_func)
self._event_generators.append(generator)
generator.start()
def unregister_listeners(self):
for l in self._subscribers:
self._channel.unsubscribe(l[0], l[1])
self._subscribers = []
def unregister_publishers(self):
if self._publisher_threads:
for t in self._publisher_threads:
t.join()
def start_event_generators(self):
for g in self._event_generators:
g.start()
def wait_event_generators(self):
for g in self._event_generators:
g.join()
self._event_generators = []