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.Collections.Generic;
using System.IO;
using System.Reflection;
using Nini.Config;
using log4net;
using OpenSim.Framework;
using OpenSim.Data;
using OpenSim.Services.Interfaces;
using OpenMetaverse;
namespace OpenSim.Services.AssetService
{
/// <summary>
/// A de-duplicating asset service.
/// </summary>
public class XAssetService : XAssetServiceBase, IAssetService
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
protected static XAssetService m_RootInstance;
public XAssetService(IConfigSource config) : this(config, "AssetService") {}
public XAssetService(IConfigSource config, string configName) : base(config, configName)
{
if (m_RootInstance == null)
{
m_RootInstance = this;
if (m_AssetLoader != null)
{
IConfig assetConfig = config.Configs[configName];
if (assetConfig == null)
throw new Exception("No AssetService configuration");
string loaderArgs = assetConfig.GetString("AssetLoaderArgs", String.Empty);
bool assetLoaderEnabled = assetConfig.GetBoolean("AssetLoaderEnabled", true);
if (assetLoaderEnabled && !HasChainedAssetService)
{
m_log.DebugFormat("[XASSET SERVICE]: Loading default asset set from {0}", loaderArgs);
m_AssetLoader.ForEachDefaultXmlAsset(
loaderArgs,
a =>
{
AssetBase existingAsset = Get(a.ID);
// AssetMetadata existingMetadata = GetMetadata(a.ID);
if (existingAsset == null || Util.SHA1Hash(existingAsset.Data) != Util.SHA1Hash(a.Data))
{
// m_log.DebugFormat("[ASSET]: Storing {0} {1}", a.Name, a.ID);
Store(a);
}
});
}
m_log.Debug("[XASSET SERVICE]: Local asset service enabled");
}
}
}
public virtual AssetBase Get(string id)
{
// m_log.DebugFormat("[ASSET SERVICE]: Get asset for {0}", id);
UUID assetID;
if (!UUID.TryParse(id, out assetID))
{
m_log.WarnFormat("[XASSET SERVICE]: Could not parse requested asset id {0}", id);
return null;
}
try
{
AssetBase asset = m_Database.GetAsset(assetID);
if (asset != null)
{
return asset;
}
else if (HasChainedAssetService)
{
asset = m_ChainedAssetService.Get(id);
if (asset != null)
MigrateFromChainedService(asset);
return asset;
}
return null;
}
catch (Exception e)
{
m_log.ErrorFormat("[XASSET SERVICE]: Exception getting asset {0} {1}", assetID, e);
return null;
}
}
public virtual AssetBase GetCached(string id)
{
return Get(id);
}
public virtual AssetMetadata GetMetadata(string id)
{
// m_log.DebugFormat("[XASSET SERVICE]: Get asset metadata for {0}", id);
AssetBase asset = Get(id);
if (asset != null)
return asset.Metadata;
else
return null;
}
public virtual byte[] GetData(string id)
{
// m_log.DebugFormat("[XASSET SERVICE]: Get asset data for {0}", id);
AssetBase asset = Get(id);
if (asset != null)
return asset.Data;
else
return null;
}
public virtual bool Get(string id, Object sender, AssetRetrieved handler)
{
//m_log.DebugFormat("[XASSET SERVICE]: Get asset async {0}", id);
UUID assetID;
if (!UUID.TryParse(id, out assetID))
return false;
AssetBase asset = Get(id);
//m_log.DebugFormat("[XASSET SERVICE]: Got asset {0}", asset);
handler(id, sender, asset);
return true;
}
public virtual string Store(AssetBase asset)
{
if (!m_Database.ExistsAsset(asset.FullID))
{
// m_log.DebugFormat(
// "[XASSET SERVICE]: Storing asset {0} {1}, bytes {2}", asset.Name, asset.FullID, asset.Data.Length);
m_Database.StoreAsset(asset);
}
// else
// {
// m_log.DebugFormat(
// "[XASSET SERVICE]: Not storing asset {0} {1}, bytes {2} as it already exists", asset.Name, asset.FullID, asset.Data.Length);
// }
return asset.ID;
}
public bool UpdateContent(string id, byte[] data)
{
return false;
}
public virtual bool Delete(string id)
{
// m_log.DebugFormat("[XASSET SERVICE]: Deleting asset {0}", id);
UUID assetID;
if (!UUID.TryParse(id, out assetID))
return false;
if (HasChainedAssetService)
m_ChainedAssetService.Delete(id);
return m_Database.Delete(id);
}
private void MigrateFromChainedService(AssetBase asset)
{
Store(asset);
m_ChainedAssetService.Delete(asset.ID);
}
}
}
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