forked from apache/shenyu
/
concurrent_request_rate_limiter.lua
33 lines (29 loc) · 1.11 KB
/
concurrent_request_rate_limiter.lua
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--
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements. See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
local key = KEYS[1]
local capacity = tonumber(ARGV[2])
local timestamp = tonumber(ARGV[3])
local id = KEYS[2]
local count = redis.call("zcard", key)
local allowed = 0
if count < capacity then
redis.call("zadd", key, timestamp, id)
allowed = 1
count = count + 1
end
-- redis.call("setex", key, timestamp)
return { allowed, count }