374 lines
12 KiB
C#
374 lines
12 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 log4net;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Reflection;
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using Nini.Config;
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using OpenSim.Framework;
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using OpenSim.Framework.Console;
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using OpenSim.Framework.Communications;
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using OpenSim.Services.Interfaces;
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using OpenMetaverse;
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namespace OpenSim.Services.Connectors
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{
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public class AssetServicesConnector : BaseServiceConnector, IAssetService
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{
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private static readonly ILog m_log =
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LogManager.GetLogger(
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MethodBase.GetCurrentMethod().DeclaringType);
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private string m_ServerURI = String.Empty;
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private IImprovedAssetCache m_Cache = null;
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private int m_maxAssetRequestConcurrency = 30;
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private delegate void AssetRetrievedEx(AssetBase asset);
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// Keeps track of concurrent requests for the same asset, so that it's only loaded once.
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// Maps: Asset ID -> Handlers which will be called when the asset has been loaded
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private Dictionary<string, AssetRetrievedEx> m_AssetHandlers = new Dictionary<string, AssetRetrievedEx>();
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public int MaxAssetRequestConcurrency
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{
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get { return m_maxAssetRequestConcurrency; }
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set { m_maxAssetRequestConcurrency = value; }
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}
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public AssetServicesConnector()
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{
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}
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public AssetServicesConnector(string serverURI)
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{
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m_ServerURI = serverURI.TrimEnd('/');
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}
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public AssetServicesConnector(IConfigSource source)
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: base(source, "AssetService")
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{
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Initialise(source);
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}
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public virtual void Initialise(IConfigSource source)
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{
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IConfig netconfig = source.Configs["Network"];
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if (netconfig != null)
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m_maxAssetRequestConcurrency = netconfig.GetInt("MaxRequestConcurrency",m_maxAssetRequestConcurrency);
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IConfig assetConfig = source.Configs["AssetService"];
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if (assetConfig == null)
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{
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m_log.Error("[ASSET CONNECTOR]: AssetService missing from OpenSim.ini");
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throw new Exception("Asset connector init error");
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}
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string serviceURI = assetConfig.GetString("AssetServerURI",
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String.Empty);
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if (serviceURI == String.Empty)
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{
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m_log.Error("[ASSET CONNECTOR]: No Server URI named in section AssetService");
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throw new Exception("Asset connector init error");
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}
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m_ServerURI = serviceURI;
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}
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protected void SetCache(IImprovedAssetCache cache)
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{
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m_Cache = cache;
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}
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public AssetBase Get(string id)
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{
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// m_log.DebugFormat("[ASSET SERVICE CONNECTOR]: Synchronous get request for {0}", id);
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string uri = m_ServerURI + "/assets/" + id;
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AssetBase asset = null;
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if (m_Cache != null)
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asset = m_Cache.Get(id);
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if (asset == null)
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{
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// XXX: Commented out for now since this has either never been properly operational or not for some time
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// as m_maxAssetRequestConcurrency was being passed as the timeout, not a concurrency limiting option.
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// Wasn't noticed before because timeout wasn't actually used.
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// Not attempting concurrency setting for now as this omission was discovered in release candidate
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// phase for OpenSimulator 0.8. Need to revisit afterwards.
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// asset
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// = SynchronousRestObjectRequester.MakeRequest<int, AssetBase>(
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// "GET", uri, 0, m_maxAssetRequestConcurrency);
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asset = SynchronousRestObjectRequester.MakeRequest<int, AssetBase>("GET", uri, 0, m_Auth);
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if (m_Cache != null)
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m_Cache.Cache(asset);
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}
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return asset;
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}
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public AssetBase GetCached(string id)
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{
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// m_log.DebugFormat("[ASSET SERVICE CONNECTOR]: Cache request for {0}", id);
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if (m_Cache != null)
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return m_Cache.Get(id);
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return null;
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}
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public AssetMetadata GetMetadata(string id)
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{
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if (m_Cache != null)
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{
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AssetBase fullAsset = m_Cache.Get(id);
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if (fullAsset != null)
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return fullAsset.Metadata;
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}
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string uri = m_ServerURI + "/assets/" + id + "/metadata";
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AssetMetadata asset = SynchronousRestObjectRequester.MakeRequest<int, AssetMetadata>("GET", uri, 0, m_Auth);
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return asset;
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}
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public byte[] GetData(string id)
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{
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if (m_Cache != null)
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{
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AssetBase fullAsset = m_Cache.Get(id);
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if (fullAsset != null)
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return fullAsset.Data;
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}
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using (RestClient rc = new RestClient(m_ServerURI))
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{
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rc.AddResourcePath("assets");
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rc.AddResourcePath(id);
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rc.AddResourcePath("data");
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rc.RequestMethod = "GET";
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Stream s = rc.Request(m_Auth);
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if (s == null)
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return null;
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if (s.Length > 0)
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{
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byte[] ret = new byte[s.Length];
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s.Read(ret, 0, (int)s.Length);
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return ret;
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}
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return null;
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}
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}
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public bool Get(string id, Object sender, AssetRetrieved handler)
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{
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// m_log.DebugFormat("[ASSET SERVICE CONNECTOR]: Potentially asynchronous get request for {0}", id);
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string uri = m_ServerURI + "/assets/" + id;
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AssetBase asset = null;
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if (m_Cache != null)
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asset = m_Cache.Get(id);
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if (asset == null)
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{
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lock (m_AssetHandlers)
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{
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AssetRetrievedEx handlerEx = new AssetRetrievedEx(delegate(AssetBase _asset) { handler(id, sender, _asset); });
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AssetRetrievedEx handlers;
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if (m_AssetHandlers.TryGetValue(id, out handlers))
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{
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// Someone else is already loading this asset. It will notify our handler when done.
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handlers += handlerEx;
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return true;
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}
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// Load the asset ourselves
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handlers += handlerEx;
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m_AssetHandlers.Add(id, handlers);
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}
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bool success = false;
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try
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{
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AsynchronousRestObjectRequester.MakeRequest<int, AssetBase>("GET", uri, 0,
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delegate(AssetBase a)
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{
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if (a != null && m_Cache != null)
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m_Cache.Cache(a);
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AssetRetrievedEx handlers;
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lock (m_AssetHandlers)
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{
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handlers = m_AssetHandlers[id];
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m_AssetHandlers.Remove(id);
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}
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handlers.Invoke(a);
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}, m_maxAssetRequestConcurrency, m_Auth);
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success = true;
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}
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finally
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{
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if (!success)
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{
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lock (m_AssetHandlers)
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{
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m_AssetHandlers.Remove(id);
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}
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}
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}
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}
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else
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{
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handler(id, sender, asset);
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}
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return true;
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}
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public virtual bool[] AssetsExist(string[] ids)
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{
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string uri = m_ServerURI + "/get_assets_exist";
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bool[] exist = null;
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try
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{
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exist = SynchronousRestObjectRequester.MakeRequest<string[], bool[]>("POST", uri, ids, m_Auth);
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}
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catch (Exception)
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{
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// This is most likely to happen because the server doesn't support this function,
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// so just silently return "doesn't exist" for all the assets.
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}
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if (exist == null)
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exist = new bool[ids.Length];
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return exist;
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}
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public string Store(AssetBase asset)
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{
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if (asset.Local)
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{
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if (m_Cache != null)
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m_Cache.Cache(asset);
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return asset.ID;
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}
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string uri = m_ServerURI + "/assets/";
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string newID;
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try
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{
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newID = SynchronousRestObjectRequester.MakeRequest<AssetBase, string>("POST", uri, asset, m_Auth);
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}
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catch (Exception e)
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{
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m_log.Warn(string.Format("[ASSET CONNECTOR]: Unable to send asset {0} to asset server. Reason: {1} ", asset.ID, e.Message), e);
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return string.Empty;
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}
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// TEMPORARY: SRAS returns 'null' when it's asked to store existing assets
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if (newID == null)
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{
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m_log.DebugFormat("[ASSET CONNECTOR]: Storing of asset {0} returned null; assuming the asset already exists", asset.ID);
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return asset.ID;
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}
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if (string.IsNullOrEmpty(newID))
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return string.Empty;
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asset.ID = newID;
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if (m_Cache != null)
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m_Cache.Cache(asset);
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return newID;
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}
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public bool UpdateContent(string id, byte[] data)
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{
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AssetBase asset = null;
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if (m_Cache != null)
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asset = m_Cache.Get(id);
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if (asset == null)
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{
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AssetMetadata metadata = GetMetadata(id);
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if (metadata == null)
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return false;
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asset = new AssetBase(metadata.FullID, metadata.Name, metadata.Type, UUID.Zero.ToString());
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asset.Metadata = metadata;
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}
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asset.Data = data;
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string uri = m_ServerURI + "/assets/" + id;
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if (SynchronousRestObjectRequester.MakeRequest<AssetBase, bool>("POST", uri, asset, m_Auth))
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{
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if (m_Cache != null)
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m_Cache.Cache(asset);
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return true;
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}
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return false;
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}
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public bool Delete(string id)
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{
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string uri = m_ServerURI + "/assets/" + id;
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if (SynchronousRestObjectRequester.MakeRequest<int, bool>("DELETE", uri, 0, m_Auth))
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{
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if (m_Cache != null)
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m_Cache.Expire(id);
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return true;
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}
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return false;
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}
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}
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}
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