1 files changed, 40 insertions, 0 deletions
diff --git a/openresty-ext/src/assembly/resources/openresty/nginx/luaext/lib/tools/rr_cache.lua b/openresty-ext/src/assembly/resources/openresty/nginx/luaext/lib/tools/rr_cache.lua
new file mode 100644
index 0000000..bfcc157
--- /dev/null
+++ b/openresty-ext/src/assembly/resources/openresty/nginx/luaext/lib/tools/rr_cache.lua
@@ -0,0 +1,40 @@
+--[[
+
+    Copyright (C) 2016 ZTE, Inc. and others. All rights reserved. (ZTE)
+
+    Licensed 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.
+
+--]]
+
+-- round-robin cache over LRUCache， used within one worker processes
+local _M = {}
+_M._VERSION = '1.0.0'
+
+local lrucache = require "resty.lrucache"
+
+-- we need to initialize the cache on the lua module level so that
+-- it can be shared by all the requests served by each nginx worker process:
+local rrcache,err = lrucache.new(500)  -- allow up to 200 items in the cache
+if not rrcache then
+	return ngx.log(ngx.ERR,"failed to create the cache: " .. (err or "unknown"))
+end
+
+function _M.get(key)
+	return rrcache:get(key)
+end
+
+function _M.set(key,value)
+	rrcache:set(key, value)
+end
+
+return _M
+\ No newline at end of file