opensim – Rev 1
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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Data;
using System.Reflection;
using System.Collections.Generic;
using log4net;
using MySql.Data.MySqlClient;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Data;
namespace OpenSim.Data.MySQL
{
/// <summary>
/// A MySQL Interface for the Asset Server
/// </summary>
public class MySQLAssetData : AssetDataBase
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private string m_connectionString;
private object m_dbLock = new object();
protected virtual Assembly Assembly
{
get { return GetType().Assembly; }
}
#region IPlugin Members
public override string Version { get { return "1.0.0.0"; } }
/// <summary>
/// <para>Initialises Asset interface</para>
/// <para>
/// <list type="bullet">
/// <item>Loads and initialises the MySQL storage plugin.</item>
/// <item>Warns and uses the obsolete mysql_connection.ini if connect string is empty.</item>
/// <item>Check for migration</item>
/// </list>
/// </para>
/// </summary>
/// <param name="connect">connect string</param>
public override void Initialise(string connect)
{
m_connectionString = connect;
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
Migration m = new Migration(dbcon, Assembly, "AssetStore");
m.Update();
}
}
public override void Initialise()
{
throw new NotImplementedException();
}
public override void Dispose() { }
/// <summary>
/// The name of this DB provider
/// </summary>
override public string Name
{
get { return "MySQL Asset storage engine"; }
}
#endregion
#region IAssetDataPlugin Members
/// <summary>
/// Fetch Asset <paramref name="assetID"/> from database
/// </summary>
/// <param name="assetID">Asset UUID to fetch</param>
/// <returns>Return the asset</returns>
/// <remarks>On failure : throw an exception and attempt to reconnect to database</remarks>
override public AssetBase GetAsset(UUID assetID)
{
AssetBase asset = null;
lock (m_dbLock)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
using (MySqlCommand cmd = new MySqlCommand(
"SELECT name, description, assetType, local, temporary, asset_flags, CreatorID, data FROM assets WHERE id=?id",
dbcon))
{
cmd.Parameters.AddWithValue("?id", assetID.ToString());
try
{
using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
{
if (dbReader.Read())
{
asset = new AssetBase(assetID, (string)dbReader["name"], (sbyte)dbReader["assetType"], dbReader["CreatorID"].ToString());
asset.Data = (byte[])dbReader["data"];
asset.Description = (string)dbReader["description"];
string local = dbReader["local"].ToString();
if (local.Equals("1") || local.Equals("true", StringComparison.InvariantCultureIgnoreCase))
asset.Local = true;
else
asset.Local = false;
asset.Temporary = Convert.ToBoolean(dbReader["temporary"]);
asset.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]);
}
}
}
catch (Exception e)
{
m_log.Error(
string.Format("[ASSETS DB]: MySql failure fetching asset {0}. Exception ", assetID), e);
}
}
}
}
return asset;
}
/// <summary>
/// Create an asset in database, or update it if existing.
/// </summary>
/// <param name="asset">Asset UUID to create</param>
/// <remarks>On failure : Throw an exception and attempt to reconnect to database</remarks>
override public void StoreAsset(AssetBase asset)
{
lock (m_dbLock)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
using (MySqlCommand cmd =
new MySqlCommand(
"replace INTO assets(id, name, description, assetType, local, temporary, create_time, access_time, asset_flags, CreatorID, data)" +
"VALUES(?id, ?name, ?description, ?assetType, ?local, ?temporary, ?create_time, ?access_time, ?asset_flags, ?CreatorID, ?data)",
dbcon))
{
string assetName = asset.Name;
if (asset.Name.Length > 64)
{
assetName = asset.Name.Substring(0, 64);
m_log.WarnFormat(
"[ASSET DB]: Name '{0}' for asset {1} truncated from {2} to {3} characters on add",
asset.Name, asset.ID, asset.Name.Length, assetName.Length);
}
string assetDescription = asset.Description;
if (asset.Description.Length > 64)
{
assetDescription = asset.Description.Substring(0, 64);
m_log.WarnFormat(
"[ASSET DB]: Description '{0}' for asset {1} truncated from {2} to {3} characters on add",
asset.Description, asset.ID, asset.Description.Length, assetDescription.Length);
}
try
{
using (cmd)
{
// create unix epoch time
int now = (int)Utils.DateTimeToUnixTime(DateTime.UtcNow);
cmd.Parameters.AddWithValue("?id", asset.ID);
cmd.Parameters.AddWithValue("?name", assetName);
cmd.Parameters.AddWithValue("?description", assetDescription);
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("?CreatorID", asset.Metadata.CreatorID);
cmd.Parameters.AddWithValue("?asset_flags", (int)asset.Flags);
cmd.Parameters.AddWithValue("?data", asset.Data);
cmd.ExecuteNonQuery();
}
}
catch (Exception e)
{
m_log.Error(
string.Format(
"[ASSET DB]: MySQL failure creating asset {0} with name {1}. Exception ",
asset.FullID, asset.Name)
, e);
}
}
}
}
}
private void UpdateAccessTime(AssetBase asset)
{
lock (m_dbLock)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
using (MySqlCommand cmd
= new MySqlCommand("update assets set access_time=?access_time where id=?id", dbcon))
{
try
{
using (cmd)
{
// create unix epoch time
int now = (int)Utils.DateTimeToUnixTime(DateTime.UtcNow);
cmd.Parameters.AddWithValue("?id", asset.ID);
cmd.Parameters.AddWithValue("?access_time", now);
cmd.ExecuteNonQuery();
}
}
catch (Exception e)
{
m_log.Error(
string.Format(
"[ASSETS DB]: Failure updating access_time for asset {0} with name {1}. Exception ",
asset.FullID, asset.Name),
e);
}
}
}
}
}
/// <summary>
/// Check if the asset exists in the database
/// </summary>
/// <param name="uuid">The asset UUID</param>
/// <returns>true if it exists, false otherwise.</returns>
override public bool ExistsAsset(UUID uuid)
{
// m_log.DebugFormat("[ASSETS DB]: Checking for asset {0}", uuid);
bool assetExists = false;
lock (m_dbLock)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
using (MySqlCommand cmd = new MySqlCommand("SELECT id FROM assets WHERE id=?id", dbcon))
{
cmd.Parameters.AddWithValue("?id", uuid.ToString());
try
{
using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
{
if (dbReader.Read())
{
// m_log.DebugFormat("[ASSETS DB]: Found asset {0}", uuid);
assetExists = true;
}
}
}
catch (Exception e)
{
m_log.Error(
string.Format("[ASSETS DB]: MySql failure fetching asset {0}. Exception ", uuid), e);
}
}
}
}
return assetExists;
}
/// <summary>
/// Returns a list of AssetMetadata objects. The list is a subset of
/// the entire data set offset by <paramref name="start" /> containing
/// <paramref name="count" /> elements.
/// </summary>
/// <param name="start">The number of results to discard from the total data set.</param>
/// <param name="count">The number of rows the returned list should contain.</param>
/// <returns>A list of AssetMetadata objects.</returns>
public override List<AssetMetadata> FetchAssetMetadataSet(int start, int count)
{
List<AssetMetadata> retList = new List<AssetMetadata>(count);
lock (m_dbLock)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
using (MySqlCommand cmd
= new MySqlCommand(
"SELECT name,description,assetType,temporary,id,asset_flags,CreatorID FROM assets LIMIT ?start, ?count",
dbcon))
{
cmd.Parameters.AddWithValue("?start", start);
cmd.Parameters.AddWithValue("?count", count);
try
{
using (MySqlDataReader dbReader = cmd.ExecuteReader())
{
while (dbReader.Read())
{
AssetMetadata metadata = new AssetMetadata();
metadata.Name = (string)dbReader["name"];
metadata.Description = (string)dbReader["description"];
metadata.Type = (sbyte)dbReader["assetType"];
metadata.Temporary = Convert.ToBoolean(dbReader["temporary"]); // Not sure if this is correct.
metadata.Flags = (AssetFlags)Convert.ToInt32(dbReader["asset_flags"]);
metadata.FullID = DBGuid.FromDB(dbReader["id"]);
metadata.CreatorID = dbReader["CreatorID"].ToString();
// Current SHA1s are not stored/computed.
metadata.SHA1 = new byte[] { };
retList.Add(metadata);
}
}
}
catch (Exception e)
{
m_log.Error(
string.Format(
"[ASSETS DB]: MySql failure fetching asset set from {0}, count {1}. Exception ",
start, count),
e);
}
}
}
}
return retList;
}
public override bool Delete(string id)
{
lock (m_dbLock)
{
using (MySqlConnection dbcon = new MySqlConnection(m_connectionString))
{
dbcon.Open();
using (MySqlCommand cmd = new MySqlCommand("delete from assets where id=?id", dbcon))
{
cmd.Parameters.AddWithValue("?id", id);
cmd.ExecuteNonQuery();
}
}
}
return true;
}
#endregion
}
}
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