590 lines
26 KiB
C#
590 lines
26 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.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.IO.Compression;
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using System.Reflection;
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using System.Security.Cryptography;
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using System.Text;
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using log4net;
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using OpenMetaverse;
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using OpenSim.Framework;
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using OpenSim.Data;
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using Npgsql;
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namespace OpenSim.Data.PGSQL
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{
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public class PGSQLXAssetData : IXAssetDataPlugin
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{
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private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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protected virtual Assembly Assembly
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{
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get { return GetType().Assembly; }
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}
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/// <summary>
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/// Number of days that must pass before we update the access time on an asset when it has been fetched.
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/// </summary>
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private const int DaysBetweenAccessTimeUpdates = 30;
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private bool m_enableCompression = false;
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private PGSQLManager m_database;
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private string m_connectionString;
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private object m_dbLock = new object();
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/// <summary>
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/// We can reuse this for all hashing since all methods are single-threaded through m_dbBLock
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/// </summary>
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private HashAlgorithm hasher = new SHA256CryptoServiceProvider();
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#region IPlugin Members
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public string Version { get { return "1.0.0.0"; } }
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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 PGSQL storage plugin.</item>
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/// <item>Warns and uses the obsolete pgsql_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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public void Initialise(string connect)
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{
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m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: THIS PLUGIN IS STRICTLY EXPERIMENTAL.");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: DO NOT USE FOR ANY DATA THAT YOU DO NOT MIND LOSING.");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: DATABASE TABLES CAN CHANGE AT ANY TIME, CAUSING EXISTING DATA TO BE LOST.");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************");
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m_log.ErrorFormat("[PGSQL XASSETDATA]: ***********************************************************");
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m_connectionString = connect;
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m_database = new PGSQLManager(m_connectionString);
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using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
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{
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dbcon.Open();
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Migration m = new Migration(dbcon, Assembly, "XAssetStore");
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m.Update();
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}
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}
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public void Initialise()
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{
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throw new NotImplementedException();
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}
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public void Dispose() { }
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/// <summary>
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/// The name of this DB provider
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/// </summary>
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public string Name
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{
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get { return "PGSQL XAsset 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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public AssetBase GetAsset(UUID assetID)
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{
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// m_log.DebugFormat("[PGSQL XASSET DATA]: Looking for asset {0}", assetID);
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AssetBase asset = null;
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lock (m_dbLock)
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{
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using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
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{
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dbcon.Open();
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using (NpgsqlCommand cmd = new NpgsqlCommand(
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@"SELECT name, description, access_time, ""AssetType"", local, temporary, asset_flags, creatorid, data
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FROM XAssetsMeta
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JOIN XAssetsData ON XAssetsMeta.hash = XAssetsData.Hash WHERE id=:ID",
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dbcon))
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{
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cmd.Parameters.Add(m_database.CreateParameter("ID", assetID));
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try
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{
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using (NpgsqlDataReader 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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assetID,
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(string)dbReader["name"],
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Convert.ToSByte(dbReader["AssetType"]),
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dbReader["creatorid"].ToString());
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asset.Data = (byte[])dbReader["data"];
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asset.Description = (string)dbReader["description"];
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string local = dbReader["local"].ToString();
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if (local.Equals("1") || local.Equals("true", StringComparison.InvariantCultureIgnoreCase))
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asset.Local = true;
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else
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asset.Local = false;
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asset.Temporary = Convert.ToBoolean(dbReader["temporary"]);
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asset.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]);
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if (m_enableCompression)
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{
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using (GZipStream decompressionStream = new GZipStream(new MemoryStream(asset.Data), CompressionMode.Decompress))
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{
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MemoryStream outputStream = new MemoryStream();
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WebUtil.CopyStream(decompressionStream, outputStream, int.MaxValue);
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// int compressedLength = asset.Data.Length;
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asset.Data = outputStream.ToArray();
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// m_log.DebugFormat(
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// "[XASSET DB]: Decompressed {0} {1} to {2} bytes from {3}",
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// asset.ID, asset.Name, asset.Data.Length, compressedLength);
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}
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}
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UpdateAccessTime(asset.Metadata, (int)dbReader["access_time"]);
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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(string.Format("[PGSQL XASSET DATA]: Failure fetching asset {0}", assetID), e);
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}
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}
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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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public void StoreAsset(AssetBase asset)
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{
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// m_log.DebugFormat("[XASSETS DB]: Storing asset {0} {1}", asset.Name, asset.ID);
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lock (m_dbLock)
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{
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using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
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{
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dbcon.Open();
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using (NpgsqlTransaction transaction = dbcon.BeginTransaction())
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{
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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.WarnFormat(
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"[XASSET DB]: Name '{0}' for asset {1} truncated from {2} to {3} characters on add",
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asset.Name, asset.ID, asset.Name.Length, assetName.Length);
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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.WarnFormat(
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"[XASSET DB]: Description '{0}' for asset {1} truncated from {2} to {3} characters on add",
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asset.Description, asset.ID, asset.Description.Length, assetDescription.Length);
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}
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if (m_enableCompression)
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{
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MemoryStream outputStream = new MemoryStream();
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using (GZipStream compressionStream = new GZipStream(outputStream, CompressionMode.Compress, false))
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{
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// Console.WriteLine(WebUtil.CopyTo(new MemoryStream(asset.Data), compressionStream, int.MaxValue));
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// We have to close the compression stream in order to make sure it writes everything out to the underlying memory output stream.
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compressionStream.Close();
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byte[] compressedData = outputStream.ToArray();
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asset.Data = compressedData;
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}
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}
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byte[] hash = hasher.ComputeHash(asset.Data);
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UUID asset_id;
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UUID.TryParse(asset.ID, out asset_id);
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// m_log.DebugFormat(
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// "[XASSET DB]: Compressed data size for {0} {1}, hash {2} is {3}",
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// asset.ID, asset.Name, hash, compressedData.Length);
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try
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{
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using (NpgsqlCommand cmd =
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new NpgsqlCommand(
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@"insert INTO XAssetsMeta(id, hash, name, description, ""AssetType"", local, temporary, create_time, access_time, asset_flags, creatorid)
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Select :ID, :Hash, :Name, :Description, :AssetType, :Local, :Temporary, :CreateTime, :AccessTime, :AssetFlags, :CreatorID
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where not exists( Select id from XAssetsMeta where id = :ID);
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update XAssetsMeta
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set id = :ID, hash = :Hash, name = :Name, description = :Description,
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""AssetType"" = :AssetType, local = :Local, temporary = :Temporary, create_time = :CreateTime,
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access_time = :AccessTime, asset_flags = :AssetFlags, creatorid = :CreatorID
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where id = :ID;
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",
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dbcon))
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{
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// create unix epoch time
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int now = (int)Utils.DateTimeToUnixTime(DateTime.UtcNow);
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cmd.Parameters.Add(m_database.CreateParameter("ID", asset_id));
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cmd.Parameters.Add(m_database.CreateParameter("Hash", hash));
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cmd.Parameters.Add(m_database.CreateParameter("Name", assetName));
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cmd.Parameters.Add(m_database.CreateParameter("Description", assetDescription));
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cmd.Parameters.Add(m_database.CreateParameter("AssetType", asset.Type));
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cmd.Parameters.Add(m_database.CreateParameter("Local", asset.Local));
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cmd.Parameters.Add(m_database.CreateParameter("Temporary", asset.Temporary));
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cmd.Parameters.Add(m_database.CreateParameter("CreateTime", now));
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cmd.Parameters.Add(m_database.CreateParameter("AccessTime", now));
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cmd.Parameters.Add(m_database.CreateParameter("CreatorID", asset.Metadata.CreatorID));
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cmd.Parameters.Add(m_database.CreateParameter("AssetFlags", (int)asset.Flags));
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cmd.ExecuteNonQuery();
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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("[ASSET DB]: PGSQL failure creating asset metadata {0} with name \"{1}\". Error: {2}",
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asset.FullID, asset.Name, e.Message);
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transaction.Rollback();
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return;
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}
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if (!ExistsData(dbcon, transaction, hash))
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{
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try
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{
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using (NpgsqlCommand cmd =
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new NpgsqlCommand(
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@"INSERT INTO XAssetsData(hash, data) VALUES(:Hash, :Data)",
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dbcon))
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{
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cmd.Parameters.Add(m_database.CreateParameter("Hash", hash));
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cmd.Parameters.Add(m_database.CreateParameter("Data", asset.Data));
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cmd.ExecuteNonQuery();
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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("[XASSET DB]: PGSQL failure creating asset data {0} with name \"{1}\". Error: {2}",
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asset.FullID, asset.Name, e.Message);
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transaction.Rollback();
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return;
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}
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}
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transaction.Commit();
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}
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}
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}
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}
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/// <summary>
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/// Updates the access time of the asset if it was accessed above a given threshhold amount of time.
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/// </summary>
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/// <remarks>
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/// This gives us some insight into assets which haven't ben accessed for a long period. This is only done
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/// over the threshold time to avoid excessive database writes as assets are fetched.
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/// </remarks>
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/// <param name='asset'></param>
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/// <param name='accessTime'></param>
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private void UpdateAccessTime(AssetMetadata assetMetadata, int accessTime)
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{
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DateTime now = DateTime.UtcNow;
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if ((now - Utils.UnixTimeToDateTime(accessTime)).TotalDays < DaysBetweenAccessTimeUpdates)
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return;
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lock (m_dbLock)
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{
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using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
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{
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dbcon.Open();
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NpgsqlCommand cmd =
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new NpgsqlCommand(@"update XAssetsMeta set access_time=:AccessTime where id=:ID", dbcon);
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try
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{
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UUID asset_id;
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UUID.TryParse(assetMetadata.ID, out asset_id);
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using (cmd)
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{
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// create unix epoch time
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cmd.Parameters.Add(m_database.CreateParameter("id", asset_id));
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cmd.Parameters.Add(m_database.CreateParameter("access_time", (int)Utils.DateTimeToUnixTime(now)));
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cmd.ExecuteNonQuery();
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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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"[XASSET PGSQL DB]: Failure updating access_time for asset {0} with name {1} : {2}",
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assetMetadata.ID, assetMetadata.Name, e.Message);
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}
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}
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}
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}
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/// <summary>
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/// We assume we already have the m_dbLock.
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/// </summary>
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/// TODO: need to actually use the transaction.
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/// <param name="dbcon"></param>
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/// <param name="transaction"></param>
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/// <param name="hash"></param>
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/// <returns></returns>
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private bool ExistsData(NpgsqlConnection dbcon, NpgsqlTransaction transaction, byte[] hash)
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{
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// m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid);
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bool exists = false;
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using (NpgsqlCommand cmd = new NpgsqlCommand(@"SELECT hash FROM XAssetsData WHERE hash=:Hash", dbcon))
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{
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cmd.Parameters.Add(m_database.CreateParameter("Hash", hash));
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try
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{
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using (NpgsqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
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{
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if (dbReader.Read())
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{
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// m_log.DebugFormat("[ASSETS DB]: Found asset {0}", uuid);
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exists = true;
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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.ErrorFormat(
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"[XASSETS DB]: PGSql failure in ExistsData fetching hash {0}. Exception {1}{2}",
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hash, e.Message, e.StackTrace);
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}
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}
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return exists;
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}
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/// <summary>
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/// Check if the assets exist in the database.
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/// </summary>
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/// <param name="uuids">The assets' IDs</param>
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/// <returns>For each asset: true if it exists, false otherwise</returns>
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public bool[] AssetsExist(UUID[] uuids)
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{
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if (uuids.Length == 0)
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return new bool[0];
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HashSet<UUID> exist = new HashSet<UUID>();
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string ids = "'" + string.Join("','", uuids) + "'";
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string sql = string.Format(@"SELECT id FROM XAssetsMeta WHERE id IN ({0})", ids);
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using (NpgsqlConnection conn = new NpgsqlConnection(m_connectionString))
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{
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conn.Open();
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using (NpgsqlCommand cmd = new NpgsqlCommand(sql, conn))
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{
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using (NpgsqlDataReader reader = cmd.ExecuteReader())
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{
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while (reader.Read())
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{
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UUID id = DBGuid.FromDB(reader["id"]);
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exist.Add(id);
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}
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}
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}
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}
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bool[] results = new bool[uuids.Length];
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for (int i = 0; i < uuids.Length; i++)
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results[i] = exist.Contains(uuids[i]);
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return results;
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}
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/// <summary>
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/// Check if the asset exists in the database
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/// </summary>
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/// <param name="uuid">The asset UUID</param>
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/// <returns>true if it exists, false otherwise.</returns>
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public bool ExistsAsset(UUID uuid)
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{
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// m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid);
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bool assetExists = false;
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lock (m_dbLock)
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{
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using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
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{
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dbcon.Open();
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using (NpgsqlCommand cmd = new NpgsqlCommand(@"SELECT id FROM XAssetsMeta WHERE id=:ID", dbcon))
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{
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cmd.Parameters.Add(m_database.CreateParameter("id", uuid));
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try
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{
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using (NpgsqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
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{
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if (dbReader.Read())
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{
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// m_log.DebugFormat("[ASSETS DB]: Found asset {0}", uuid);
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assetExists = true;
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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(string.Format("[XASSETS DB]: PGSql failure fetching asset {0}", uuid), e);
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}
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}
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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>
|
|
/// <returns>A list of AssetMetadata objects.</returns>
|
|
public List<AssetMetadata> FetchAssetMetadataSet(int start, int count)
|
|
{
|
|
List<AssetMetadata> retList = new List<AssetMetadata>(count);
|
|
|
|
lock (m_dbLock)
|
|
{
|
|
using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
|
|
{
|
|
dbcon.Open();
|
|
using(NpgsqlCommand cmd = new NpgsqlCommand(@"SELECT name, description, access_time, ""AssetType"", temporary, id, asset_flags, creatorid
|
|
FROM XAssetsMeta
|
|
LIMIT :start, :count",dbcon))
|
|
{
|
|
cmd.Parameters.Add(m_database.CreateParameter("start",start));
|
|
cmd.Parameters.Add(m_database.CreateParameter("count", count));
|
|
|
|
try
|
|
{
|
|
using (NpgsqlDataReader dbReader = cmd.ExecuteReader())
|
|
{
|
|
while (dbReader.Read())
|
|
{
|
|
AssetMetadata metadata = new AssetMetadata();
|
|
metadata.Name = (string)dbReader["name"];
|
|
metadata.Description = (string)dbReader["description"];
|
|
metadata.Type = Convert.ToSByte(dbReader["AssetType"]);
|
|
metadata.Temporary = Convert.ToBoolean(dbReader["temporary"]);
|
|
metadata.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]);
|
|
metadata.FullID = DBGuid.FromDB(dbReader["id"]);
|
|
metadata.CreatorID = dbReader["creatorid"].ToString();
|
|
|
|
// We'll ignore this for now - it appears unused!
|
|
// metadata.SHA1 = dbReader["hash"]);
|
|
|
|
UpdateAccessTime(metadata, (int)dbReader["access_time"]);
|
|
|
|
retList.Add(metadata);
|
|
}
|
|
}
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
m_log.Error("[XASSETS DB]: PGSql failure fetching asset set" + Environment.NewLine + e.ToString());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return retList;
|
|
}
|
|
|
|
public bool Delete(string id)
|
|
{
|
|
// m_log.DebugFormat("[XASSETS DB]: Deleting asset {0}", id);
|
|
|
|
lock (m_dbLock)
|
|
{
|
|
using (NpgsqlConnection dbcon = new NpgsqlConnection(m_connectionString))
|
|
{
|
|
dbcon.Open();
|
|
|
|
using (NpgsqlCommand cmd = new NpgsqlCommand(@"delete from XAssetsMeta where id=:ID", dbcon))
|
|
{
|
|
cmd.Parameters.Add(m_database.CreateParameter(id, id));
|
|
cmd.ExecuteNonQuery();
|
|
}
|
|
|
|
// TODO: How do we deal with data from deleted assets? Probably not easily reapable unless we
|
|
// keep a reference count (?)
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|