From 84cc69573bb522122606c3bc29c8ab188d4ccf70 Mon Sep 17 00:00:00 2001
From: Mike Mazur
Date: Fri, 25 Jul 2008 07:16:27 +0000
Subject: Thanks, lulurun, for a patch that adds an authenticated session cache
 to reduce "check_auth_session" requests from inventory server to user server.

---
 .../Grid/InventoryServer/GridInventoryService.cs   | 38 +++++++++++++++-------
 1 file changed, 27 insertions(+), 11 deletions(-)

(limited to 'OpenSim/Grid/InventoryServer/GridInventoryService.cs')

diff --git a/OpenSim/Grid/InventoryServer/GridInventoryService.cs b/OpenSim/Grid/InventoryServer/GridInventoryService.cs
index b8a0436..63eeced 100644
--- a/OpenSim/Grid/InventoryServer/GridInventoryService.cs
+++ b/OpenSim/Grid/InventoryServer/GridInventoryService.cs
@@ -38,6 +38,7 @@ using Nwc.XmlRpc;
 
 using OpenSim.Framework;
 using OpenSim.Framework.Communications;
+using OpenSim.Framework.Communications.Cache;
 
 namespace OpenSim.Grid.InventoryServer
 {
@@ -48,8 +49,10 @@ namespace OpenSim.Grid.InventoryServer
     {
         private static readonly ILog m_log
             = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        private static readonly int INVENTORY_DEFAULT_SESSION_TIME = 30; // secs
 
         private string m_userserver_url;
+        private AuthedSessionCache m_session_cache = new AuthedSessionCache(INVENTORY_DEFAULT_SESSION_TIME);
 
         public GridInventoryService(string userserver_url)
         {
@@ -72,20 +75,33 @@ namespace OpenSim.Grid.InventoryServer
         public bool CheckAuthSession(string session_id, string avatar_id)
         {
             m_log.InfoFormat("[GRID AGENT INVENTORY]: checking authed session {0} {1}", session_id, avatar_id);
-            Hashtable requestData = new Hashtable();
-            requestData["avatar_uuid"] = avatar_id;
-            requestData["session_id"] = session_id;
-            ArrayList SendParams = new ArrayList();
-            SendParams.Add(requestData);
-            XmlRpcRequest UserReq = new XmlRpcRequest("check_auth_session", SendParams);
-            XmlRpcResponse UserResp = UserReq.Send(m_userserver_url, 3000);
-
-            Hashtable responseData = (Hashtable)UserResp.Value;
-
-            if (responseData.ContainsKey("auth_session") && responseData["auth_session"].ToString() == "TRUE")
+            if (m_session_cache.getCachedSession(session_id, avatar_id) == null)
+            {
+                // cache miss, ask userserver
+                Hashtable requestData = new Hashtable();
+                requestData["avatar_uuid"] = avatar_id;
+                requestData["session_id"] = session_id;
+                ArrayList SendParams = new ArrayList();
+                SendParams.Add(requestData);
+                XmlRpcRequest UserReq = new XmlRpcRequest("check_auth_session", SendParams);
+                XmlRpcResponse UserResp = UserReq.Send(m_userserver_url, 3000);
+
+                Hashtable responseData = (Hashtable)UserResp.Value;
+                if (responseData.ContainsKey("auth_session") && responseData["auth_session"].ToString() == "TRUE")
+                {
+                    m_log.Info("[GRID AGENT INVENTORY]: got authed session from userserver");
+                    // add to cache; the session time will be automatically renewed
+                    m_session_cache.Add(session_id, avatar_id);
+                    return true;
+                }
+            }
+            else
             {
+                // cache hits
+                m_log.Info("[GRID AGENT INVENTORY]: got authed session from cache");
                 return true;
             }
+            m_log.Info("[GRID AGENT INVENTORY]: unknown session_id, request rejected");
             return false;
         }
 
-- 
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