387 lines
16 KiB
C#
387 lines
16 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Data;
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using System.Reflection;
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using System.Collections.Generic;
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using log4net;
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using MySql.Data.MySqlClient;
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using OpenMetaverse;
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using OpenSim.Framework;
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namespace OpenSim.Data.MySQL
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{
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/// <summary>
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/// A MySQL Interface for the Asset Server
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/// </summary>
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public class MySQLAssetData : AssetDataBase
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{
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private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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private MySQLManager _dbConnection;
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private long TicksToEpoch;
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#region IPlugin Members
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/// <summary>
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/// <para>Initialises Asset interface</para>
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/// <para>
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/// <list type="bullet">
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/// <item>Loads and initialises the MySQL storage plugin.</item>
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/// <item>Warns and uses the obsolete mysql_connection.ini if connect string is empty.</item>
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/// <item>Check for migration</item>
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/// </list>
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/// </para>
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/// </summary>
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/// <param name="connect">connect string</param>
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override public void Initialise(string connect)
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{
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TicksToEpoch = new DateTime(1970,1,1).Ticks;
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// TODO: This will let you pass in the connect string in
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// the config, though someone will need to write that.
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if (connect == String.Empty)
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{
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// This is old seperate config file
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m_log.Warn("no connect string, using old mysql_connection.ini instead");
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Initialise();
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}
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else
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{
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_dbConnection = new MySQLManager(connect);
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}
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// This actually does the roll forward assembly stuff
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Assembly assem = GetType().Assembly;
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Migration m = new Migration(_dbConnection.Connection, assem, "AssetStore");
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m.Update();
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}
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/// <summary>
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/// <para>Initialises Asset interface</para>
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/// <para>
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/// <list type="bullet">
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/// <item>Loads and initialises the MySQL storage plugin</item>
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/// <item>uses the obsolete mysql_connection.ini</item>
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/// </list>
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/// </para>
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/// </summary>
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/// <remarks>DEPRECATED and shouldn't be used</remarks>
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public override void Initialise()
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{
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IniFile GridDataMySqlFile = new IniFile("mysql_connection.ini");
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string hostname = GridDataMySqlFile.ParseFileReadValue("hostname");
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string database = GridDataMySqlFile.ParseFileReadValue("database");
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string username = GridDataMySqlFile.ParseFileReadValue("username");
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string password = GridDataMySqlFile.ParseFileReadValue("password");
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string pooling = GridDataMySqlFile.ParseFileReadValue("pooling");
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string port = GridDataMySqlFile.ParseFileReadValue("port");
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_dbConnection = new MySQLManager(hostname, database, username, password, pooling, port);
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}
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public override void Dispose() { }
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/// <summary>
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/// Database provider version
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/// </summary>
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override public string Version
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{
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get { return _dbConnection.getVersion(); }
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}
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/// <summary>
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/// The name of this DB provider
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/// </summary>
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override public string Name
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{
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get { return "MySQL Asset storage engine"; }
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}
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#endregion
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#region IAssetDataPlugin Members
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/// <summary>
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/// Fetch Asset <paramref name="assetID"/> from database
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/// </summary>
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/// <param name="assetID">Asset UUID to fetch</param>
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/// <returns>Return the asset</returns>
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/// <remarks>On failure : throw an exception and attempt to reconnect to database</remarks>
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override public AssetBase GetAsset(UUID assetID)
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{
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AssetBase asset = null;
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lock (_dbConnection)
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{
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_dbConnection.CheckConnection();
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MySqlCommand cmd =
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new MySqlCommand(
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"SELECT name, description, assetType, local, temporary, data FROM assets WHERE id=?id",
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_dbConnection.Connection);
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cmd.Parameters.AddWithValue("?id", assetID.ToString());
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try
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{
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using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
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{
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if (dbReader.Read())
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{
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asset = new AssetBase();
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asset.Data = (byte[]) dbReader["data"];
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asset.Description = (string) dbReader["description"];
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asset.FullID = assetID;
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try
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{
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asset.Local = (bool)dbReader["local"];
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}
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catch (InvalidCastException)
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{
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asset.Local = false;
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}
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asset.Name = (string) dbReader["name"];
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asset.Type = (sbyte) dbReader["assetType"];
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asset.Temporary = Convert.ToBoolean(dbReader["temporary"]);
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}
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dbReader.Close();
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cmd.Dispose();
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}
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if (asset != null)
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UpdateAccessTime(asset);
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}
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catch (Exception e)
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{
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m_log.ErrorFormat(
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"[ASSETS DB]: MySql failure fetching asset {0}" + Environment.NewLine + e.ToString()
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+ Environment.NewLine + "Reconnecting", assetID);
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_dbConnection.Reconnect();
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}
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}
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return asset;
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}
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/// <summary>
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/// Create an asset in database, or update it if existing.
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/// </summary>
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/// <param name="asset">Asset UUID to create</param>
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/// <remarks>On failure : Throw an exception and attempt to reconnect to database</remarks>
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override public void StoreAsset(AssetBase asset)
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{
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lock (_dbConnection)
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{
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_dbConnection.CheckConnection();
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MySqlCommand cmd =
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new MySqlCommand(
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"replace INTO assets(id, name, description, assetType, local, temporary, create_time, access_time, data)" +
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"VALUES(?id, ?name, ?description, ?assetType, ?local, ?temporary, ?create_time, ?access_time, ?data)",
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_dbConnection.Connection);
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string assetName = asset.Name;
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if (asset.Name.Length > 64)
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{
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assetName = asset.Name.Substring(0, 64);
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m_log.Warn("[ASSET DB]: Name field truncated from " + asset.Name.Length + " to " + assetName.Length + " characters on add");
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}
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string assetDescription = asset.Description;
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if (asset.Description.Length > 64)
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{
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assetDescription = asset.Description.Substring(0, 64);
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m_log.Warn("[ASSET DB]: Description field truncated from " + asset.Description.Length + " to " + assetDescription.Length + " characters on add");
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}
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// need to ensure we dispose
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try
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{
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using (cmd)
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{
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// create unix epoch time
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int now = (int)((DateTime.Now.Ticks - TicksToEpoch) / 10000000);
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cmd.Parameters.AddWithValue("?id", asset.ID);
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cmd.Parameters.AddWithValue("?name", assetName);
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cmd.Parameters.AddWithValue("?description", assetDescription);
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cmd.Parameters.AddWithValue("?assetType", asset.Type);
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cmd.Parameters.AddWithValue("?local", asset.Local);
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cmd.Parameters.AddWithValue("?temporary", asset.Temporary);
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cmd.Parameters.AddWithValue("?create_time", now);
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cmd.Parameters.AddWithValue("?access_time", now);
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cmd.Parameters.AddWithValue("?data", asset.Data);
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cmd.ExecuteNonQuery();
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cmd.Dispose();
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}
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}
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catch (Exception e)
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{
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m_log.ErrorFormat(
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"[ASSETS DB]: " +
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"MySql failure creating asset {0} with name {1}" + Environment.NewLine + e.ToString()
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+ Environment.NewLine + "Attempting reconnection", asset.FullID, asset.Name);
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_dbConnection.Reconnect();
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}
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}
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}
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private void UpdateAccessTime(AssetBase asset)
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{
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lock (_dbConnection)
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{
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_dbConnection.CheckConnection();
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MySqlCommand cmd =
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new MySqlCommand("update assets set access_time=?access_time where id=?id",
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_dbConnection.Connection);
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// need to ensure we dispose
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try
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{
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using (cmd)
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{
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// create unix epoch time
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int now = (int)((DateTime.Now.Ticks - TicksToEpoch) / 10000000);
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cmd.Parameters.AddWithValue("?id", asset.ID);
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cmd.Parameters.AddWithValue("?access_time", now);
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cmd.ExecuteNonQuery();
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cmd.Dispose();
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}
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}
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catch (Exception e)
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{
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m_log.ErrorFormat(
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"[ASSETS DB]: " +
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"MySql failure updating access_time for asset {0} with name {1}" + Environment.NewLine + e.ToString()
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+ Environment.NewLine + "Attempting reconnection", asset.FullID, asset.Name);
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_dbConnection.Reconnect();
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}
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}
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}
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/// <summary>
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/// check if the asset UUID exist in database
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/// </summary>
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/// <param name="uuid">The asset UUID</param>
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/// <returns>true if exist.</returns>
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override public bool ExistsAsset(UUID uuid)
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{
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bool assetExists = false;
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lock (_dbConnection)
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{
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_dbConnection.CheckConnection();
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MySqlCommand cmd =
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new MySqlCommand(
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"SELECT id FROM assets WHERE id=?id",
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_dbConnection.Connection);
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cmd.Parameters.AddWithValue("?id", uuid.ToString());
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try
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{
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using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
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{
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if (dbReader.Read())
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{
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assetExists = true;
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}
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dbReader.Close();
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cmd.Dispose();
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}
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}
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catch (Exception e)
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{
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m_log.ErrorFormat(
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"[ASSETS DB]: MySql failure fetching asset {0}" + Environment.NewLine + e.ToString()
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+ Environment.NewLine + "Attempting reconnection", uuid);
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_dbConnection.Reconnect();
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}
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}
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return assetExists;
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}
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/// <summary>
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/// Returns a list of AssetMetadata objects. The list is a subset of
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/// the entire data set offset by <paramref name="start" /> containing
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/// <paramref name="count" /> elements.
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/// </summary>
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/// <param name="start">The number of results to discard from the total data set.</param>
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/// <param name="count">The number of rows the returned list should contain.</param>
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/// <returns>A list of AssetMetadata objects.</returns>
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public override List<AssetMetadata> FetchAssetMetadataSet(int start, int count)
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{
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List<AssetMetadata> retList = new List<AssetMetadata>(count);
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lock (_dbConnection)
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{
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_dbConnection.CheckConnection();
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MySqlCommand cmd = new MySqlCommand("SELECT name,description,assetType,temporary,id FROM assets LIMIT ?start, ?count", _dbConnection.Connection);
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cmd.Parameters.AddWithValue("?start", start);
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cmd.Parameters.AddWithValue("?count", count);
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try
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{
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using (MySqlDataReader dbReader = cmd.ExecuteReader())
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{
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while (dbReader.Read())
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{
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AssetMetadata metadata = new AssetMetadata();
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metadata.Name = (string) dbReader["name"];
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metadata.Description = (string) dbReader["description"];
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metadata.Type = (sbyte) dbReader["assetType"];
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metadata.Temporary = Convert.ToBoolean(dbReader["temporary"]); // Not sure if this is correct.
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metadata.FullID = new UUID((string) dbReader["id"]);
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// Current SHA1s are not stored/computed.
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metadata.SHA1 = new byte[] {};
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retList.Add(metadata);
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}
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}
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}
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catch (Exception e)
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{
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m_log.Error("[ASSETS DB]: MySql failure fetching asset set" + Environment.NewLine + e.ToString() + Environment.NewLine + "Attempting reconnection");
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_dbConnection.Reconnect();
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}
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}
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return retList;
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}
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#endregion
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}
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}
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