Redis在社交网络中的应用探索

# 用户信息存储
hash_set("user:1", "name", "Alice")
hash_set("user:1", "age", "20")
hash_set("user:1", "city", "Beijing")
hash_set("user:1", "gender", "female")

# 好友列表存储
sadd("friend:1", 2)
sadd("friend:1", 3)

# 关注列表存储
sadd("following:1", 4)
sadd("following:1", 5)

# 粉丝列表存储
sadd("follower:1", 6)
sadd("follower:1", 7)

# 简化版的实时通知
def notify(user_id, message):
    # 将消息存储到消息队列中
    lpush("notification:%d" % user_id, message)
    # 使用Redis发布订阅模式，通知用户
    publish("notification:%d" % user_id, "")

# 发送实时通知
notify(1, "您有新的私信")

# 简化版的获取实时通知
def get_notifications(user_id):
    # 从队列中获取消息
    notifications = lrange("notification:%d" % user_id, 0, -1)
    # 删除已读消息
    delete("notification:%d" % user_id)
    return notifications

# 获取实时通知
notifications = get_notifications(1)
for notification in notifications:
    print(notification)

# 建立好友关系
sadd("friend:1", 2)
sadd("friend:2", 1)

# 建立关注关系
sadd("following:1", 2)
sadd("follower:2", 1)

# 查询好友列表
friends = smembers("friend:1")

# 查询共同好友
common_friends = friends & smembers("friend:2")

# 查询共同关注
following = smembers("following:1")
common_following = following & smembers("following:2")

# 查询共同粉丝
follower = smembers("follower:1")
common_follower = follower & smembers("follower:2")