From 4f9825961743684dfb76827e2353497182a83d8a Mon Sep 17 00:00:00 2001
From: Diva Canto <diva@metaverseink.com>
Date: Fri, 9 Nov 2012 20:39:55 -0800
Subject: [PATCH] Minor improvement in the MapSearchModule. Stop blocking the
 client thread if the search takes too long.

---
 .../World/WorldMap/MapSearchModule.cs         | 74 ++++++++++++++-----
 1 file changed, 55 insertions(+), 19 deletions(-)

diff --git a/OpenSim/Region/CoreModules/World/WorldMap/MapSearchModule.cs b/OpenSim/Region/CoreModules/World/WorldMap/MapSearchModule.cs
index 7de1bb2cf7..8f1a35ded9 100644
--- a/OpenSim/Region/CoreModules/World/WorldMap/MapSearchModule.cs
+++ b/OpenSim/Region/CoreModules/World/WorldMap/MapSearchModule.cs
@@ -45,6 +45,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
 
         Scene m_scene = null; // only need one for communication with GridService
         List<Scene> m_scenes = new List<Scene>();
+        List<UUID> m_Clients;
 
         #region ISharedRegionModule Members
         public void Initialise(IConfigSource source)
@@ -60,6 +61,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
 
             m_scenes.Add(scene);
             scene.EventManager.OnNewClient += OnNewClient;
+            m_Clients = new List<UUID>();
         }
 
         public void RemoveRegion(Scene scene)
@@ -98,17 +100,51 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
 
         private void OnNewClient(IClientAPI client)
         {
-            client.OnMapNameRequest += OnMapNameRequest;
+            client.OnMapNameRequest += OnMapNameRequestHandler;
+        }
+
+        private void OnMapNameRequestHandler(IClientAPI remoteClient, string mapName, uint flags)
+        {
+            lock (m_Clients)
+            {
+                if (m_Clients.Contains(remoteClient.AgentId))
+                    return;
+
+                m_Clients.Add(remoteClient.AgentId);
+            }
+
+            Util.FireAndForget(delegate
+            {
+                try
+                {
+                    OnMapNameRequest(remoteClient, mapName, flags);
+                }
+                finally
+                {
+                    lock (m_Clients)
+                        m_Clients.Remove(remoteClient.AgentId);
+                }
+            });
+
         }
 
         private void OnMapNameRequest(IClientAPI remoteClient, string mapName, uint flags)
         {
-            if (mapName.Length < 3)
+            List<MapBlockData> blocks = new List<MapBlockData>();
+            MapBlockData data;
+            if (mapName.Length < 3 || (mapName.EndsWith("#") && mapName.Length < 4))
             {
+                // final block, closing the search result
+                AddFinalBlock(blocks);
+
+                // flags are agent flags sent from the viewer.
+                // they have different values depending on different viewers, apparently
+                remoteClient.SendMapBlock(blocks, flags);
                 remoteClient.SendAlertMessage("Use a search string with at least 3 characters");
                 return;
             }
 
+
             //m_log.DebugFormat("MAP NAME=({0})", mapName);
 
             // Hack to get around the fact that ll V3 now drops the port from the
@@ -129,13 +165,8 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
             
             // try to fetch from GridServer
             List<GridRegion> regionInfos = m_scene.GridService.GetRegionsByName(m_scene.RegionInfo.ScopeID, mapName, 20);
-            if (regionInfos.Count == 0)
-                remoteClient.SendAlertMessage("Hyperlink could not be established.");
 
             m_log.DebugFormat("[MAPSEARCHMODULE]: search {0} returned {1} regions. Flags={2}", mapName, regionInfos.Count, flags);
-            List<MapBlockData> blocks = new List<MapBlockData>();
-
-            MapBlockData data;
             if (regionInfos.Count > 0)
             {
                 foreach (GridRegion info in regionInfos)
@@ -162,16 +193,7 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
             }
 
             // final block, closing the search result
-            data = new MapBlockData();
-            data.Agents = 0;
-            data.Access = 255;
-            data.MapImageId = UUID.Zero;
-            data.Name = ""; // mapName;
-            data.RegionFlags = 0;
-            data.WaterHeight = 0; // not used
-            data.X = 0;
-            data.Y = 0;
-            blocks.Add(data);
+            AddFinalBlock(blocks);
 
             // flags are agent flags sent from the viewer.
             // they have different values depending on different viewers, apparently
@@ -183,12 +205,26 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
             if (flags == 2) 
             {
                 if (regionInfos.Count == 0)
-                    remoteClient.SendAgentAlertMessage("No regions found with that name.", true);
+                    remoteClient.SendAlertMessage("No regions found with that name.");
                 else if (regionInfos.Count == 1)
-                    remoteClient.SendAgentAlertMessage("Region found!", false);
+                    remoteClient.SendAlertMessage("Region found!");
             }
         }
 
+        private void AddFinalBlock(List<MapBlockData> blocks)
+        {
+                // final block, closing the search result
+                MapBlockData data = new MapBlockData();
+                data.Agents = 0;
+                data.Access = 255;
+                data.MapImageId = UUID.Zero;
+                data.Name = "";
+                data.RegionFlags = 0;
+                data.WaterHeight = 0; // not used
+                data.X = 0;
+                data.Y = 0;
+                blocks.Add(data);
+        }
 //        private Scene GetClientScene(IClientAPI client)
 //        {
 //            foreach (Scene s in m_scenes)