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.Data.SqlClient;
using System.Reflection;
using System.Collections.Generic;
using OpenMetaverse;
using log4net;
using OpenSim.Framework;
namespace OpenSim.Data.MSSQL
{
/// <summary>
/// A MSSQL Interface for the Asset server
/// </summary>
public class MSSQLAssetData : AssetDataBase
{
private const string _migrationStore = "AssetStore";
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private long m_ticksToEpoch;
/// <summary>
/// Database manager
/// </summary>
private MSSQLManager m_database;
private string m_connectionString;
#region IPlugin Members
override public void Dispose() { }
/// <summary>
/// <para>Initialises asset interface</para>
/// </summary>
// [Obsolete("Cannot be default-initialized!")]
override public void Initialise()
{
m_log.Info("[MSSQLAssetData]: " + Name + " cannot be default-initialized!");
throw new PluginNotInitialisedException(Name);
}
/// <summary>
/// Initialises asset interface
/// </summary>
/// <para>
/// a string instead of file, if someone writes the support
/// </para>
/// <param name="connectionString">connect string</param>
override public void Initialise(string connectionString)
{
m_ticksToEpoch = new System.DateTime(1970, 1, 1).Ticks;
m_database = new MSSQLManager(connectionString);
m_connectionString = connectionString;
//New migration to check for DB changes
m_database.CheckMigration(_migrationStore);
}
/// <summary>
/// Database provider version.
/// </summary>
override public string Version
{
get { return m_database.getVersion(); }
}
/// <summary>
/// The name of this DB provider.
/// </summary>
override public string Name
{
get { return "MSSQL Asset storage engine"; }
}
#endregion
#region IAssetDataPlugin Members
/// <summary>
/// Fetch Asset from m_database
/// </summary>
/// <param name="assetID">the asset UUID</param>
/// <returns></returns>
override public AssetBase GetAsset(UUID assetID)
{
string sql = "SELECT * FROM assets WHERE id = @id";
using (SqlConnection conn = new SqlConnection(m_connectionString))
using (SqlCommand cmd = new SqlCommand(sql, conn))
{
cmd.Parameters.Add(m_database.CreateParameter("id", assetID));
conn.Open();
using (SqlDataReader reader = cmd.ExecuteReader())
{
if (reader.Read())
{
AssetBase asset = new AssetBase(
DBGuid.FromDB(reader["id"]),
(string)reader["name"],
Convert.ToSByte(reader["assetType"]),
reader["creatorid"].ToString()
);
// Region Main
asset.Description = (string)reader["description"];
asset.Local = Convert.ToBoolean(reader["local"]);
asset.Temporary = Convert.ToBoolean(reader["temporary"]);
asset.Flags = (AssetFlags)(Convert.ToInt32(reader["asset_flags"]));
asset.Data = (byte[])reader["data"];
return asset;
}
return null; // throw new Exception("No rows to return");
}
}
}
/// <summary>
/// Create asset in m_database
/// </summary>
/// <param name="asset">the asset</param>
override public void StoreAsset(AssetBase asset)
{
string sql =
@"IF EXISTS(SELECT * FROM assets WHERE id=@id)
UPDATE assets set name = @name, description = @description, assetType = @assetType,
local = @local, temporary = @temporary, creatorid = @creatorid, data = @data
WHERE id=@id
ELSE
INSERT INTO assets
([id], [name], [description], [assetType], [local],
[temporary], [create_time], [access_time], [creatorid], [asset_flags], [data])
VALUES
(@id, @name, @description, @assetType, @local,
@temporary, @create_time, @access_time, @creatorid, @asset_flags, @data)";
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);
}
using (SqlConnection conn = new SqlConnection(m_connectionString))
using (SqlCommand command = new SqlCommand(sql, conn))
{
int now = (int)((System.DateTime.Now.Ticks - m_ticksToEpoch) / 10000000);
command.Parameters.Add(m_database.CreateParameter("id", asset.FullID));
command.Parameters.Add(m_database.CreateParameter("name", assetName));
command.Parameters.Add(m_database.CreateParameter("description", assetDescription));
command.Parameters.Add(m_database.CreateParameter("assetType", asset.Type));
command.Parameters.Add(m_database.CreateParameter("local", asset.Local));
command.Parameters.Add(m_database.CreateParameter("temporary", asset.Temporary));
command.Parameters.Add(m_database.CreateParameter("access_time", now));
command.Parameters.Add(m_database.CreateParameter("create_time", now));
command.Parameters.Add(m_database.CreateParameter("asset_flags", (int)asset.Flags));
command.Parameters.Add(m_database.CreateParameter("creatorid", asset.Metadata.CreatorID));
command.Parameters.Add(m_database.CreateParameter("data", asset.Data));
conn.Open();
try
{
command.ExecuteNonQuery();
}
catch(Exception e)
{
m_log.Error("[ASSET DB]: Error storing item :" + e.Message);
}
}
}
// Commented out since currently unused - this probably should be called in GetAsset()
// private void UpdateAccessTime(AssetBase asset)
// {
// using (AutoClosingSqlCommand cmd = m_database.Query("UPDATE assets SET access_time = @access_time WHERE id=@id"))
// {
// int now = (int)((System.DateTime.Now.Ticks - m_ticksToEpoch) / 10000000);
// cmd.Parameters.AddWithValue("@id", asset.FullID.ToString());
// cmd.Parameters.AddWithValue("@access_time", now);
// try
// {
// cmd.ExecuteNonQuery();
// }
// catch (Exception e)
// {
// m_log.Error(e.ToString());
// }
// }
// }
/// <summary>
/// Check if asset exist in m_database
/// </summary>
/// <param name="uuid"></param>
/// <returns>true if exist.</returns>
override public bool ExistsAsset(UUID uuid)
{
if (GetAsset(uuid) != null)
{
return true;
}
return false;
}
/// <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);
string sql = @"WITH OrderedAssets AS
(
SELECT id, name, description, assetType, temporary, creatorid,
RowNumber = ROW_NUMBER() OVER (ORDER BY id)
FROM assets
)
SELECT *
FROM OrderedAssets
WHERE RowNumber BETWEEN @start AND @stop;";
using (SqlConnection conn = new SqlConnection(m_connectionString))
using (SqlCommand cmd = new SqlCommand(sql, conn))
{
cmd.Parameters.Add(m_database.CreateParameter("start", start));
cmd.Parameters.Add(m_database.CreateParameter("stop", start + count - 1));
conn.Open();
using (SqlDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
AssetMetadata metadata = new AssetMetadata();
metadata.FullID = DBGuid.FromDB(reader["id"]);
metadata.Name = (string)reader["name"];
metadata.Description = (string)reader["description"];
metadata.Type = Convert.ToSByte(reader["assetType"]);
metadata.Temporary = Convert.ToBoolean(reader["temporary"]);
metadata.CreatorID = (string)reader["creatorid"];
retList.Add(metadata);
}
}
}
return retList;
}
public override bool Delete(string id)
{
return false;
}
#endregion
}
}