703 lines
23 KiB
C#
703 lines
23 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.Threading;
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using System.Collections.Generic;
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using System.Collections.Concurrent;
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using System.IO;
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using System.Reflection;
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using System.Timers;
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using Nini.Config;
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using OpenSim.Framework;
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using OpenSim.Framework.Monitoring;
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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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const int MAXSENDRETRIESLEN = 30;
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private IAssetCache m_Cache = null;
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private int m_retryCounter;
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private bool m_inRetries;
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private List<AssetBase>[] m_sendRetries = new List<AssetBase>[MAXSENDRETRIESLEN];
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private System.Timers.Timer m_retryTimer;
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private int m_maxAssetRequestConcurrency = 30;
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private List<String> m_assetServers = new List<String>();
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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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private Dictionary<string, List<AssetRetrievedEx>> m_AssetHandlers = new Dictionary<string, List<AssetRetrievedEx>>();
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private Thread[] m_fetchThreads;
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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_assetServers.AddRange(serverURI.TrimEnd('/').Split(';'));
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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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m_assetServers.AddRange(assetConfig.GetString("AssetServerURI", String.Empty).Split(';'));
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if (m_assetServers.Count == 0)
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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_retryTimer = new System.Timers.Timer();
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m_retryTimer.Elapsed += new ElapsedEventHandler(retryCheck);
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m_retryTimer.AutoReset = true;
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m_retryTimer.Interval = 60000;
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m_fetchThreads = new Thread[2];
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for (int i = 0 ; i < 2 ; i++)
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{
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m_fetchThreads[i] = WorkManager.StartThread(AssetRequestProcessor, String.Format("GetAssetsWorker{0}", i));
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}
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}
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private string MapServer(String m_ServerURI, string id)
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{
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return m_ServerURI;
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}
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protected void retryCheck(object source, ElapsedEventArgs e)
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{
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lock(m_sendRetries)
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{
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if(m_inRetries)
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return;
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m_inRetries = true;
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}
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m_retryCounter++;
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if(m_retryCounter >= 61 ) // avoid overflow 60 is max in use below
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m_retryCounter = 1;
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int inUse = 0;
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int nextlevel;
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int timefactor;
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List<AssetBase> retrylist;
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// we need to go down
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for(int i = MAXSENDRETRIESLEN - 1; i >= 0; i--)
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{
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lock(m_sendRetries)
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retrylist = m_sendRetries[i];
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if(retrylist == null)
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continue;
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inUse++;
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nextlevel = i + 1;
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//We exponentially fall back on frequency until we reach one attempt per hour
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//The net result is that we end up in the queue for roughly 24 hours..
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//24 hours worth of assets could be a lot, so the hope is that the region admin
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//will have gotten the asset connector back online quickly!
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if(i == 0)
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timefactor = 1;
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else
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{
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timefactor = 1 << nextlevel;
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if (timefactor > 60)
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timefactor = 60;
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}
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if(m_retryCounter < timefactor)
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continue; // to update inUse;
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if (m_retryCounter % timefactor != 0)
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continue;
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// a list to retry
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lock(m_sendRetries)
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m_sendRetries[i] = null;
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// we are the only ones with a copy of this retrylist now
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foreach(String server in m_assetServers)
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foreach (AssetBase ass in retrylist)
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retryStore(server, ass, nextlevel);
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}
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lock(m_sendRetries)
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{
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if(inUse == 0 )
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m_retryTimer.Stop();
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m_inRetries = false;
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}
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}
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protected void SetCache(IAssetCache 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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foreach(String serverURL in m_assetServers)
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{
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AssetBase asset = Get(serverURL, id);
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if (asset != null)
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return asset;
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}
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return null;
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}
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public AssetBase Get(String m_ServerURI, string id)
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{
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AssetBase asset = null;
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if (m_Cache != null)
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{
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if (!m_Cache.Get(id, out asset))
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return null;
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}
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if (asset == null || asset.Data == null || asset.Data.Length == 0)
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{
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string uri = MapServer(m_ServerURI, id) + "/assets/" + id;
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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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{
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if (asset != null)
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m_Cache.Cache(asset);
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else
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m_Cache.CacheNegative(id);
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}
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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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AssetBase asset = null;
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if (m_Cache != null)
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{
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m_Cache.Get(id, out asset);
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}
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return asset;
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}
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public AssetMetadata GetMetadata(string id)
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{
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foreach (String serverURL in m_assetServers)
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{
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AssetMetadata meta = GetMetadata(serverURL, id);
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if (meta != null)
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return meta;
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}
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return null;
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}
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public AssetMetadata GetMetadata(String m_ServerURI, string id)
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{
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if (m_Cache != null)
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{
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AssetBase fullAsset;
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if (!m_Cache.Get(id, out fullAsset))
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return null;
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if (fullAsset != null)
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return fullAsset.Metadata;
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}
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string uri = MapServer(m_ServerURI, id) + "/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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foreach (String serverURL in m_assetServers)
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{
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byte[] data = GetData(serverURL, id);
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if (data != null)
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return data;
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}
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return null;
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}
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public byte[] GetData(String m_ServerURI, string id)
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{
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if (m_Cache != null)
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{
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AssetBase fullAsset;
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if (!m_Cache.Get(id, out fullAsset))
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return null;
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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(MapServer(m_ServerURI, id)))
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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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using (Stream s = rc.Request(m_Auth))
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{
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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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}
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return null;
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}
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}
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private class QueuedAssetRequest
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{
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public string uri;
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public string id;
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}
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private BlockingCollection<QueuedAssetRequest> m_requestQueue = new BlockingCollection<QueuedAssetRequest>();
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private void AssetRequestProcessor()
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{
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QueuedAssetRequest r;
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while (true)
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{
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if(!m_requestQueue.TryTake(out r, 4500) || r == null)
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{
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Watchdog.UpdateThread();
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continue;
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}
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Watchdog.UpdateThread();
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string uri = r.uri;
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string id = r.id;
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try
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{
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AssetBase a = SynchronousRestObjectRequester.MakeRequest<int, AssetBase>("GET", uri, 0, 30000, m_Auth);
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if (a != null && m_Cache != null)
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m_Cache.Cache(a);
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List<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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if(handlers != null)
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{
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Util.FireAndForget(x =>
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{
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foreach (AssetRetrievedEx h in handlers)
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{
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try { h.Invoke(a); }
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catch { }
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}
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handlers.Clear();
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});
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}
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}
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catch { }
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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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foreach(String serverURL in m_assetServers)
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{
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bool result = Get(serverURL, id, sender, handler);
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if (result == true)
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return result;
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}
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return false;
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}
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public bool Get(String m_ServerURI, string id, Object sender, AssetRetrieved handler)
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{
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string uri = MapServer(m_ServerURI, id) + "/assets/" + id;
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AssetBase asset = null;
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if (m_Cache != null)
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{
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if (!m_Cache.Get(id, out asset))
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return false;
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}
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if (asset == null || asset.Data == null || asset.Data.Length == 0)
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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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List<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.Add(handlerEx);
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return true;
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}
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handlers = new List<AssetRetrievedEx>();
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handlers.Add(handlerEx);
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m_AssetHandlers.Add(id, handlers);
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QueuedAssetRequest request = new QueuedAssetRequest();
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request.id = id;
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request.uri = uri;
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m_requestQueue.Add(request);
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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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foreach (String serverURL in m_assetServers)
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{
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bool[] result = AssetsExist(serverURL, ids);
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return result;
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}
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return null;
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}
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public virtual bool[] AssetsExist(String m_ServerURI, 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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string stringUUIDZero = UUID.Zero.ToString();
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public string Store(AssetBase asset)
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{
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String result = null;
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foreach (String serverURL in m_assetServers)
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{
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result = Store(serverURL, asset);
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}
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return result;
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}
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public string Store(String m_ServerURI, AssetBase asset)
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{
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// Have to assign the asset ID here. This isn't likely to
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// trigger since current callers don't pass emtpy IDs
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// We need the asset ID to route the request to the proper
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// cluster member, so we can't have the server assign one.
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if (asset.ID == string.Empty || asset.ID == stringUUIDZero)
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{
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if (asset.FullID == UUID.Zero)
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{
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asset.FullID = UUID.Random();
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}
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m_log.WarnFormat("[Assets] Zero ID: {0}",asset.Name);
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asset.ID = asset.FullID.ToString();
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}
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if (asset.FullID == UUID.Zero)
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{
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UUID uuid = UUID.Zero;
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if (UUID.TryParse(asset.ID, out uuid))
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{
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asset.FullID = uuid;
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}
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if(asset.FullID == UUID.Zero)
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{
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m_log.WarnFormat("[Assets] Zero IDs: {0}",asset.Name);
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asset.FullID = UUID.Random();
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asset.ID = asset.FullID.ToString();
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}
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}
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if (m_Cache != null)
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m_Cache.Cache(asset);
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if (asset.Temporary || asset.Local)
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{
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return asset.ID;
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}
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string uri = MapServer(m_ServerURI, asset.FullID.ToString()) + "/assets/";
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string newID = null;
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try
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{
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newID = SynchronousRestObjectRequester.
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MakeRequest<AssetBase, string>("POST", uri, asset, 10000, m_Auth);
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}
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catch
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{
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newID = null;
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}
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if (newID == null || newID == String.Empty || newID == stringUUIDZero)
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{
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//The asset upload failed, try later
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lock(m_sendRetries)
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{
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if (m_sendRetries[0] == null)
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m_sendRetries[0] = new List<AssetBase>();
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List<AssetBase> m_queue = m_sendRetries[0];
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m_queue.Add(asset);
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m_log.WarnFormat("[Assets] Upload failed: {0} type {1} will retry later",
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asset.ID.ToString(), asset.Type.ToString());
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m_retryTimer.Start();
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}
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}
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else
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{
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if (newID != asset.ID)
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{
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// Placing this here, so that this work with old asset servers that don't send any reply back
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// SynchronousRestObjectRequester returns somethins that is not an empty string
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asset.ID = newID;
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}
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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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public void retryStore(AssetBase asset, int nextRetryLevel)
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{
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foreach (String serverURL in m_assetServers)
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{
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retryStore(serverURL, asset, nextRetryLevel);
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}
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}
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public void retryStore(String m_ServerURI, AssetBase asset, int nextRetryLevel)
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{
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/* this may be bad, so excluding
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if (m_Cache != null && !m_Cache.Check(asset.ID))
|
|
{
|
|
m_log.WarnFormat("[Assets] Upload giveup asset bc no longer in local cache: {0}",
|
|
asset.ID.ToString();
|
|
return; // if no longer in cache, it was deleted or expired
|
|
}
|
|
*/
|
|
string uri = MapServer(m_ServerURI, asset.FullID.ToString()) + "/assets/";
|
|
|
|
string newID = null;
|
|
try
|
|
{
|
|
newID = SynchronousRestObjectRequester.
|
|
MakeRequest<AssetBase, string>("POST", uri, asset, 100000, m_Auth);
|
|
}
|
|
catch
|
|
{
|
|
newID = null;
|
|
}
|
|
|
|
if (newID == null || newID == String.Empty || newID == stringUUIDZero)
|
|
{
|
|
if(nextRetryLevel >= MAXSENDRETRIESLEN)
|
|
m_log.WarnFormat("[Assets] Giving up on uploading after {2} retries id: {0} type {1}",
|
|
asset.ID.ToString(), asset.Type.ToString(), MAXSENDRETRIESLEN);
|
|
else
|
|
{
|
|
lock(m_sendRetries)
|
|
{
|
|
if (m_sendRetries[nextRetryLevel] == null)
|
|
{
|
|
m_sendRetries[nextRetryLevel] = new List<AssetBase>();
|
|
}
|
|
List<AssetBase> m_queue = m_sendRetries[nextRetryLevel];
|
|
m_queue.Add(asset);
|
|
m_log.WarnFormat("[Assets] Upload failed: {0} type {1} will retry later",
|
|
asset.ID.ToString(), asset.Type.ToString());
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m_log.InfoFormat("[Assets] Upload of {0} succeeded after {1} failed attempts", asset.ID.ToString(), nextRetryLevel.ToString());
|
|
if (newID != asset.ID)
|
|
{
|
|
asset.ID = newID;
|
|
}
|
|
}
|
|
|
|
m_Cache?.Cache(asset);
|
|
}
|
|
|
|
public bool UpdateContent(string id, byte[] data)
|
|
{
|
|
bool result = false;
|
|
|
|
foreach (String serverURL in m_assetServers)
|
|
{
|
|
result = UpdateContent(serverURL, id, data);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
public bool UpdateContent(String m_ServerURI, string id, byte[] data)
|
|
{
|
|
AssetBase asset = null;
|
|
|
|
m_Cache?.Get(id, out asset);
|
|
|
|
if (asset == null)
|
|
{
|
|
AssetMetadata metadata = GetMetadata(m_ServerURI, id);
|
|
if (metadata == null)
|
|
return false;
|
|
|
|
asset = new AssetBase(metadata.FullID, metadata.Name, metadata.Type, UUID.Zero.ToString());
|
|
asset.Metadata = metadata;
|
|
}
|
|
asset.Data = data;
|
|
|
|
string uri = MapServer(m_ServerURI, id) + "/assets/" + id;
|
|
|
|
if (SynchronousRestObjectRequester.MakeRequest<AssetBase, bool>("POST", uri, asset, m_Auth))
|
|
{
|
|
m_Cache?.Cache(asset, true);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public bool Delete(string id)
|
|
{
|
|
bool result = false;
|
|
|
|
foreach (String serverURL in m_assetServers)
|
|
{
|
|
result = Delete(serverURL, id);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
public bool Delete(String m_ServerURI, string id)
|
|
{
|
|
string uri = MapServer(m_ServerURI, id) + "/assets/" + id;
|
|
|
|
if (SynchronousRestObjectRequester.MakeRequest<int, bool>("DELETE", uri, 0, m_Auth))
|
|
{
|
|
if (m_Cache != null)
|
|
m_Cache.Expire(id);
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|