/
disque.py
77 lines (64 loc) · 2.55 KB
/
disque.py
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import random
# External
import redis
from redis import Redis
# Django
from django.utils.translation import gettext_lazy as _
from django_q.brokers import Broker
from django_q.conf import Conf
class Disque(Broker):
def enqueue(self, task):
retry = Conf.RETRY if Conf.RETRY > 0 else f"{Conf.RETRY} REPLICATE 1"
return self.connection.execute_command(
f"ADDJOB {self.list_key} {task} 500 RETRY {retry}"
).decode()
def dequeue(self):
tasks = self.connection.execute_command(
f"GETJOB COUNT {Conf.BULK} TIMEOUT 1000 FROM {self.list_key}"
)
if tasks:
return [(t[1].decode(), t[2].decode()) for t in tasks]
def queue_size(self):
return self.connection.execute_command(f"QLEN {self.list_key}")
def acknowledge(self, task_id):
command = "FASTACK" if Conf.DISQUE_FASTACK else "ACKJOB"
return self.connection.execute_command(f"{command} {task_id}")
def ping(self) -> bool:
return self.connection.execute_command("HELLO")[0] > 0
def delete(self, task_id):
return self.connection.execute_command(f"DELJOB {task_id}")
def fail(self, task_id):
return self.delete(task_id)
def delete_queue(self) -> int:
jobs = self.connection.execute_command(f"JSCAN QUEUE {self.list_key}")[1]
if jobs:
job_ids = " ".join(jid.decode() for jid in jobs)
self.connection.execute_command(f"DELJOB {job_ids}")
return len(jobs)
def info(self) -> str:
if not self._info:
info = self.connection.info("server")
self._info = f'Disque {info["disque_version"]}'
return self._info
@staticmethod
def get_connection(list_key: str = Conf.PREFIX) -> Redis:
if not Conf.DISQUE_NODES:
raise redis.exceptions.ConnectionError(_("No Disque nodes configured"))
# randomize nodes
random.shuffle(Conf.DISQUE_NODES)
# find one that works
for node in Conf.DISQUE_NODES:
host, port = node.split(":")
kwargs = {"host": host, "port": port}
if Conf.DISQUE_AUTH:
kwargs["password"] = Conf.DISQUE_AUTH
redis_client = redis.Redis(**kwargs)
redis_client.decode_responses = True
try:
redis_client.execute_command("HELLO")
return redis_client
except redis.exceptions.ConnectionError:
continue
raise redis.exceptions.ConnectionError(
_("Could not connect to any Disque nodes")
)