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| import time
from redis.lock import Lock
from rediscluster import RedisCluster, ClusterConnectionPool
class RedisCluster:
def __init__(self, config):
self.expire = 1800,
self.redis_pool = ClusterConnectionPool(
startup_nodes=config.REDIS_CLUSTER_NODES,
password=config.REDIS_CLUSTER_PASSWORD,
decode_responses=config.REDIS_DECODE_RESPONSES,
encodings=config.REDIS_CLUSTER_ENCODE,
max_connections=config.REDIS_CLUSTER_MAX_CONNECTIONS)
# 从连接池中获取连接，获取不到就一直等待
def __get_connect(self):
while (1):
try:
connect = RedisCluster(connection_pool=self.redis_pool)
return connect
except:
time.sleep(5)
def get(self, key: str) -> str:
with self.__get_connect() as redis:
return redis.get(key)
def set(self, key, value, expire=None):
if expire is None:
expire = self.expire
with self.__get_connect() as redis:
redis.setex(key, expire, value)
def get_list(self, key) -> list:
with self.__get_connect() as redis:
return redis.lrange(key, 0, -1)
# 加锁，拿不到锁就一直等待
def get_lock(self, key="common_lock", timeout=5):
with self.__get_connect() as redis:
lock = redis.lock(key, timeout=timeout)
locked = lock.acquire(blocking=True, blocking_timeout=1)
if locked:
print("获取锁" + key + "成功。")
return lock
else:
print("获取锁" + key + "失败。")
time.sleep(5)
return self.get_lock(key, timeout)
def release_lock(self, lock: Lock):
try:
lock.release()
print("释放锁成功。")
except Exception as e:
print(e)
print("释放锁失败，可能已经被释放。")
def append(self, key: str, value: str):
with self.__get_connect() as redis:
redis.rpush(key, value)
def pop(self, key: str):
with self.__get_connect() as redis:
return redis.lpop(key)
def lenth(self, key: str):
with self.__get_connect() as redis:
redis.set(key, "空")
redis.delete()
def delete(self, key: str):
with self.__get_connect() as redis:
return redis.llen(key)
|