openresty 共享内存的使用

lua_shared_dict my_shared_dict 10m;

local shared_dict = ngx.shared.my_shared_dict
-- 设置键值对local key = "example_key"local value = "example_value"local success, err = shared_dict:set(key, value)if not success then    ngx.log(ngx.ERR, "Failed to set key: ", err)end
-- 获取键值对value = shared_dict:get(key)
-- 删除键值对success, err = shared_dict:delete(key)if not success then    ngx.log(ngx.ERR, "Failed to delete key: ", err)end
-- 设置键值对并指定超时时间key = "example_key"value = "example_value"local ttl = 60  -- 超时时间，单位为秒local success, err = shared_dict:set(key, value, ttl)if not success then    ngx.log(ngx.ERR, "Failed to set key: ", err)end
-- 原子增加一个键的值key = "counter"local increment = 1local new_valuenew_value, err = shared_dict:incr(key, increment)if not new_value then    ngx.log(ngx.ERR, "Failed to increment counter: ", err)end
-- 获取共享内存区域中的所有键local keys = shared_dict:get_keys()for _, key in ipairs(keys) do    ngx.say("Key: ", key)end
-- 清空共享内存区域中的所有键值对success, err = shared_dict:flush_all()if not success then    ngx.log(ngx.ERR, "Failed to flush all: ", err)end