Add support for the extra params to scene and the event manager

OpenSim/Region/Framework/Scenes/EventManager.cs

@@ -217,6 +217,9 @@ namespace OpenSim.Region.Framework.Scenes
         /// </remarks>
         public event NewScript OnNewScript;
 
+        public delegate void ExtraSettingChangedDelegate(Scene scene, string name, string value);
+        public event ExtraSettingChangedDelegate OnExtraSettingChanged;
+
         public virtual void TriggerNewScript(UUID clientID, SceneObjectPart part, UUID itemID)
         {
             NewScript handlerNewScript = OnNewScript;
@@ -2616,5 +2619,25 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        public void TriggerExtraSettingChanged(Scene scene, string name, string val)
+        {
+            ExtraSettingChangedDelegate handler = OnExtraSettingChanged;
+
+            if (handler != null)
+            {
+                foreach (ExtraSettingChangedDelegate d in handler.GetInvocationList())
+                {
+                    try
+                    {
+                        d(scene, name, val);
+                    }
+                    catch (Exception e)
+                    {
+                        m_log.ErrorFormat("[EVENT MANAGER]: Delegate for ExtraSettingChanged failed - continuing {0} - {1}",
+                            e.Message, e.StackTrace);
+                    }
+                }
+            }
+        }
     }
 }

OpenSim/Region/Framework/Scenes/Scene.cs

@@ -5854,5 +5854,44 @@ Environment.Exit(1);
 
             callback(asset);
         }
+
+        public string GetExtraSetting(string name)
+        {
+            string val;
+
+            if (!m_extraSettings.TryGetValue(name, out val))
+                return String.Empty;
+
+            return val;
+        }
+
+        public void StoreExtraSetting(string name, string val)
+        {
+            string oldVal;
+
+            if (m_extraSettings.TryGetValue(name, out oldVal))
+            {
+                if (oldVal == val)
+                    return;
+            }
+
+            m_extraSettings[name] = val;
+
+            m_SimulationDataService.SaveExtra(RegionInfo.RegionID, name, val);
+
+            m_eventManager.TriggerExtraSettingChanged(this, name, val);
+        }
+
+        public void RemoveExtraSetting(string name)
+        {
+            if (!m_extraSettings.ContainsKey(name))
+                return;
+
+            m_extraSettings.Remove(name);
+
+            m_SimulationDataService.RemoveExtra(RegionInfo.RegionID, name);
+
+            m_eventManager.TriggerExtraSettingChanged(this, name, String.Empty);
+        }
     }
 }