如何使两个不同的模块foo.py
和bar.py
从Redis连接池中获取连接?换句话说,我们应该如何构建应用程序?
我相信目标是为所有模块设置一个统一的连接池以获取连接。
Q1:在我的示例中,这两个模块是否都从同一个连接池获取连接?
Q2:在RedisClient.py
中创建RedisClient实例,然后将该实例导入其他两个模块,这样做可以吗?还是有更好的方法?
Q3:惰性加载conn
实例变量是否真的有用?
RedisClient.py
import redis
class RedisClient(object):
def __init__(self):
self.pool = redis.ConnectionPool(host = HOST, port = PORT, password = PASSWORD)
@property
def conn(self):
if not hasattr(self, '_conn'):
self.getConnection()
return self._conn
def getConnection(self):
self._conn = redis.Redis(connection_pool = self.pool)
redisClient = RedisClient()
foo.py
from RedisClient import redisClient
species = 'lion'
key = 'zoo:{0}'.format(species)
data = redisClient.conn.hmget(key, 'age', 'weight')
print(data)
bar.py
from RedisClient import redisClient
print(redisClient.conn.ping())
这个好还是那个好?
RedisClient.py
import redis
class RedisClient(object):
def __init__(self):
self.pool = redis.ConnectionPool(host = HOST, port = PORT, password = PASSWORD)
def getConnection(self):
return redis.Redis(connection_pool = self.pool)
redisClient = RedisClient()
foo.py
from RedisClient import redisClient
species = 'lion'
key = 'zoo:{0}'.format(species)
data = redisClient.getConnection().hmget(key, 'age', 'weight')
print(data)
bar.py
from RedisClient import redisClient
print(redisClient.getConnection().ping())