Merge pull request #140 from mikefero/chore/release-3.9

chore(*) release 3.9

Changes.md

@@ -2,7 +2,7 @@
 
 All notable changes to `lua-resty-session` will be documented in this file.
 
-## Unreleased
+## [3.9] - 2022-01-14
 ### Fixed
 - Fix #138 issue of chunked cookies are not expired when session shrinks,
   thanks @alexdowad.
@@ -18,6 +18,11 @@ All notable changes to `lua-resty-session` will be documented in this file.
   - Add `session_redis_password`
   - Deprecate `session_redis_auth`; use `session_redis_password`
 
+### Changed
+- Optimize Redis and Memcache storage adapters to not connect to database
+  when not needed.
+
+
 ## [3.8] - 2021-01-04
 ### Added
 - Connection options are now passed to `redis cluster client` as well.

lib/resty/session.lua

@@ -380,7 +380,7 @@ local function init()
 end
 
 local session = {
-    _VERSION = "3.8"
+    _VERSION = "3.9"
 }
 
 session.__index = session

lib/resty/session/storage/memcache.lua

@@ -206,6 +206,10 @@ function storage:open(id, keep_lock)
 end
 
 function storage:start(id)
+    if not self.uselocking or not self.locked then
+        return true
+    end
+
     local ok, err = self:connect()
     if not ok then
         return nil, err
@@ -244,6 +248,10 @@ function storage:save(id, ttl, data, close)
 end
 
 function storage:close(id)
+    if not self.uselocking or not self.locked then
+        return true
+    end
+
     local ok, err = self:connect()
     if not ok then
         return nil, err

lib/resty/session/storage/redis.lua

@@ -383,6 +383,10 @@ function storage:open(id, keep_lock)
 end
 
 function storage:start(id)
+    if not self.uselocking or not self.locked then
+        return true
+    end
+
     local ok, err = self:connect()
     if not ok then
         return nil, err
@@ -419,6 +423,10 @@ function storage:save(id, ttl, data, close)
 end
 
 function storage:close(id)
+    if not self.uselocking or not self.locked then
+        return true
+    end
+
     local ok, err = self:connect()
     if not ok then
         return nil, err