forked from platypush/platypush
60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
import logging
|
|
import threading
|
|
from typing import Optional
|
|
|
|
from platypush.bus import Bus
|
|
from platypush.message import Message
|
|
|
|
logger = logging.getLogger('platypush:bus:redis')
|
|
|
|
|
|
class RedisBus(Bus):
|
|
"""
|
|
Overrides the in-process in-memory local bus with a Redis bus
|
|
"""
|
|
|
|
_DEFAULT_REDIS_QUEUE = 'platypush/bus'
|
|
|
|
def __init__(self, *args, on_message=None, redis_queue=None, **kwargs):
|
|
from platypush.utils import get_redis
|
|
|
|
super().__init__(on_message=on_message)
|
|
self.redis = get_redis(*args, **kwargs)
|
|
self.redis_args = kwargs
|
|
self.redis_queue = redis_queue or self._DEFAULT_REDIS_QUEUE
|
|
self.on_message = on_message
|
|
self.thread_id = threading.get_ident()
|
|
|
|
def get(self) -> Optional[Message]:
|
|
"""
|
|
Reads one message from the Redis queue
|
|
"""
|
|
|
|
try:
|
|
if self.should_stop():
|
|
return None
|
|
|
|
msg = self.redis.blpop(self.redis_queue, timeout=1)
|
|
if not msg or msg[1] is None:
|
|
return None
|
|
|
|
msg = msg[1].decode('utf-8')
|
|
return Message.build(msg)
|
|
except Exception as e:
|
|
logger.exception(e)
|
|
|
|
return None
|
|
|
|
def post(self, msg):
|
|
"""
|
|
Sends a message to the Redis queue
|
|
"""
|
|
|
|
return self.redis.rpush(self.redis_queue, str(msg))
|
|
|
|
def stop(self):
|
|
super().stop()
|
|
self.redis.close()
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|