add create_time and access_time to asset db for mysql, as well

as the code to update these at the appropriate time.  This isn't
surfaced in AssetBase yet.

Change the replace into to an insert into for asset create.  Assets
are not supposed to be updatable, and the replace into is more
expensive.

From: Sean Dague <sdague@gmail.com>

OpenSim/Data/MySQL/MySQLAssetData.cs

@@ -45,6 +45,7 @@ namespace OpenSim.Data.MySQL
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
         private MySQLManager _dbConnection;
+        private long TicksToEpoch; 
 
         #region IPlugin Members
 
@@ -61,6 +62,8 @@ namespace OpenSim.Data.MySQL
         /// <param name="connect">connect string</param>
         override public void Initialise(string connect)
         {
+            TicksToEpoch = new System.DateTime(1970,1,1).Ticks;
+
             // TODO: This will let you pass in the connect string in
             // the config, though someone will need to write that.
             if (connect == String.Empty)
@@ -146,6 +149,8 @@ namespace OpenSim.Data.MySQL
                         dbReader.Close();
                         cmd.Dispose();
                     }
+                    if (asset != null)
+                        UpdateAccessTime(asset);
                 }
                 catch (Exception e)
                 {
@@ -178,8 +183,8 @@ namespace OpenSim.Data.MySQL
 
                 MySqlCommand cmd =
                     new MySqlCommand(
-                        "REPLACE INTO assets(id, name, description, assetType, local, temporary, data)" +
-                        "VALUES(?id, ?name, ?description, ?assetType, ?local, ?temporary, ?data)",
+                        "insert INTO assets(id, name, description, assetType, local, temporary, create_time, access_time, data)" +
+                        "VALUES(?id, ?name, ?description, ?assetType, ?local, ?temporary, ?create_time, ?access_time, ?data)",
                         _dbConnection.Connection);
 
                 // need to ensure we dispose
@@ -187,12 +192,16 @@ namespace OpenSim.Data.MySQL
                 {
                     using (cmd)
                     {
+                        // create unix epoch time
+                        int now = (int)((System.DateTime.Now.Ticks - TicksToEpoch) / 10000000);
                         cmd.Parameters.AddWithValue("?id", asset.FullID.ToString());
                         cmd.Parameters.AddWithValue("?name", asset.Name);
                         cmd.Parameters.AddWithValue("?description", asset.Description);
                         cmd.Parameters.AddWithValue("?assetType", asset.Type);
                         cmd.Parameters.AddWithValue("?local", asset.Local);
                         cmd.Parameters.AddWithValue("?temporary", asset.Temporary);
+                        cmd.Parameters.AddWithValue("?create_time", now);
+                        cmd.Parameters.AddWithValue("?access_time", now);
                         cmd.Parameters.AddWithValue("?data", asset.Data);
                         cmd.ExecuteNonQuery();
                         cmd.Dispose();
@@ -209,6 +218,41 @@ namespace OpenSim.Data.MySQL
             }
         }
 
+        private void UpdateAccessTime(AssetBase asset)
+        {
+            lock (_dbConnection)
+            {
+                _dbConnection.CheckConnection();
+
+                MySqlCommand cmd =
+                    new MySqlCommand("update assets set access_time=?access_time where id=?id",
+                                     _dbConnection.Connection);
+
+                // need to ensure we dispose
+                try
+                {
+                    using (cmd)
+                    {
+                        // create unix epoch time
+                        int now = (int)((System.DateTime.Now.Ticks - TicksToEpoch) / 10000000);
+                        cmd.Parameters.AddWithValue("?id", asset.FullID.ToString());
+                        cmd.Parameters.AddWithValue("?access_time", now);
+                        cmd.ExecuteNonQuery();
+                        cmd.Dispose();
+                    }
+                }
+                catch (Exception e)
+                {
+                    m_log.ErrorFormat(
+                        "[ASSETS DB]: " +
+                        "MySql failure updating access_time for asset {0} with name {1}" + Environment.NewLine + e.ToString()
+                        + Environment.NewLine + "Attempting reconnection", asset.FullID, asset.Name);
+                    _dbConnection.Reconnect();
+                }
+            }
+            
+        }
+
         /// <summary>
         /// Update a asset in database, see <see cref="CreateAsset"/>
         /// </summary>

OpenSim/Data/MySQL/Resources/005_AssetStore.sql

@@ -0,0 +1,6 @@
+BEGIN;
+
+ALTER TABLE assets add create_time integer default 0;
+ALTER TABLE assets add access_time integer default 0;
+
+COMMIT;