destroy and remove form cache and DB all buildinsg within city when its being destroyed

src/engine/workthreads/DestroyCityThread.java

@@ -19,6 +19,7 @@ package engine.workthreads;
  */
 
 import engine.Enum;
+import engine.gameManager.BuildingManager;
 import engine.gameManager.DbManager;
 import engine.gameManager.GuildManager;
 import engine.gameManager.ZoneManager;
@@ -53,7 +54,6 @@ public class DestroyCityThread implements Runnable {
         // Member variable assignment
 
         cityZone = city.getParent();
-        newParent = cityZone.getParent();
         formerGuild = city.getTOL().getGuild();
 
         // Former guild loses it's tree!
@@ -99,36 +99,15 @@ public class DestroyCityThread implements Runnable {
             if (cityBuilding.getBlueprint().getBuildingGroup().equals(Enum.BuildingGroup.BANESTONE))
                 continue;
 
-            // All buildings are moved to a location relative
+            //destroy all buildings if we are destroying the city itself
-            // to their new parent zone
-
-            localCoords = ZoneManager.worldToLocal(cityBuilding.getLoc(), newParent);
-
-            DbManager.BuildingQueries.MOVE_BUILDING(cityBuilding.getObjectUUID(), newParent.getObjectUUID(), localCoords.x, localCoords.y, localCoords.z);
-
-            // All buildings are re-parented to a zone one node
-            // higher in the tree (continent) as we will be
-            // deleting the city zone very shortly.
-
-            if (cityBuilding.getParentZoneID() != newParent.getParentZoneID())
-                cityBuilding.setParentZone(newParent);
-
-            // No longer a tree, no longer any protection contract!
-
-            cityBuilding.setProtectionState(Enum.ProtectionState.NONE);
-
-            // Destroy all remaining city assets
-
-            if ((cityBuilding.getBlueprint().getBuildingGroup() == Enum.BuildingGroup.BARRACK)
-                    || (cityBuilding.getBlueprint().isWallPiece())
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == Enum.BuildingGroup.SHRINE)
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == Enum.BuildingGroup.TOL)
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == Enum.BuildingGroup.SPIRE)
-                    || (cityBuilding.getBlueprint().getBuildingGroup() == Enum.BuildingGroup.WAREHOUSE)) {
-
                 if (cityBuilding.getRank() != -1)
                     cityBuilding.setRank(-1);
-            }
+
+                if(BuildingManager.getBuildingFromCache(cityBuilding.getObjectUUID()) != null){
+                    cityBuilding.removeFromCache();
+                    DbManager.BuildingQueries.DELETE_FROM_DATABASE(cityBuilding);
+                }
+
         }
 
         if (city.getRealm() != null)