462 lines
17 KiB
C#
462 lines
17 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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*/
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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.Net;
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using System.Reflection;
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using System.Xml;
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using log4net;
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using Nini.Config;
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using OpenMetaverse;
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using Mono.Addins;
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using OpenSim.Framework;
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using OpenSim.Framework.Communications;
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using OpenSim.Region.DataSnapshot.Interfaces;
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using OpenSim.Region.Framework.Interfaces;
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using OpenSim.Region.Framework.Scenes;
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[assembly: Addin("DataSnapshot", "0.1")]
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[assembly: AddinDependency("OpenSim", "0.5")]
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namespace OpenSim.Region.DataSnapshot
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{
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[Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "DataSnapshotManager")]
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public class DataSnapshotManager : ISharedRegionModule, IDataSnapshot
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{
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#region Class members
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//Information from config
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private bool m_enabled = false;
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private bool m_configLoaded = false;
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private List<string> m_disabledModules = new List<string>();
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private Dictionary<string, string> m_gridinfo = new Dictionary<string, string>();
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private string m_snapsDir = "DataSnapshot";
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private string m_exposure_level = "minimum";
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//Lists of stuff we need
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private List<Scene> m_scenes = new List<Scene>();
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private List<IDataSnapshotProvider> m_dataproviders = new List<IDataSnapshotProvider>();
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//Various internal objects
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private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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internal object m_syncInit = new object();
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//DataServices and networking
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private string m_dataServices = "noservices";
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public string m_listener_port = ConfigSettings.DefaultRegionHttpPort.ToString();
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public string m_hostname = "127.0.0.1";
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private UUID m_Secret = UUID.Random();
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private bool m_servicesNotified = false;
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//Update timers
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private int m_period = 20; // in seconds
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private int m_maxStales = 500;
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private int m_stales = 0;
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private int m_lastUpdate = 0;
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//Program objects
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private SnapshotStore m_snapStore = null;
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#endregion
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#region Properties
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public string ExposureLevel
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{
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get { return m_exposure_level; }
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}
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public UUID Secret
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{
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get { return m_Secret; }
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}
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#endregion
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#region Region Module interface
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public void Initialise(IConfigSource config)
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{
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if (!m_configLoaded)
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{
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m_configLoaded = true;
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//m_log.Debug("[DATASNAPSHOT]: Loading configuration");
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//Read from the config for options
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lock (m_syncInit)
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{
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try
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{
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m_enabled = config.Configs["DataSnapshot"].GetBoolean("index_sims", m_enabled);
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string gatekeeper = Util.GetConfigVarFromSections<string>(config, "GatekeeperURI",
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new string[] { "Startup", "Hypergrid", "GridService" }, String.Empty);
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// Legacy. Remove soon!
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if (string.IsNullOrEmpty(gatekeeper))
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{
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IConfig conf = config.Configs["GridService"];
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if (conf != null)
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gatekeeper = conf.GetString("Gatekeeper", gatekeeper);
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}
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if (!string.IsNullOrEmpty(gatekeeper))
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m_gridinfo.Add("gatekeeperURL", gatekeeper);
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m_gridinfo.Add(
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"name", config.Configs["DataSnapshot"].GetString("gridname", "the lost continent of hippo"));
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m_exposure_level = config.Configs["DataSnapshot"].GetString("data_exposure", m_exposure_level);
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m_period = config.Configs["DataSnapshot"].GetInt("default_snapshot_period", m_period);
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m_maxStales = config.Configs["DataSnapshot"].GetInt("max_changes_before_update", m_maxStales);
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m_snapsDir = config.Configs["DataSnapshot"].GetString("snapshot_cache_directory", m_snapsDir);
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m_dataServices = config.Configs["DataSnapshot"].GetString("data_services", m_dataServices);
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m_listener_port = config.Configs["Network"].GetString("http_listener_port", m_listener_port);
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String[] annoying_string_array = config.Configs["DataSnapshot"].GetString("disable_modules", "").Split(".".ToCharArray());
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foreach (String bloody_wanker in annoying_string_array)
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{
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m_disabledModules.Add(bloody_wanker);
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}
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m_lastUpdate = Environment.TickCount;
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}
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catch (Exception)
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{
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m_log.Warn("[DATASNAPSHOT]: Could not load configuration. DataSnapshot will be disabled.");
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m_enabled = false;
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return;
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}
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}
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}
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}
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public void AddRegion(Scene scene)
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{
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if (!m_enabled)
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return;
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m_log.DebugFormat("[DATASNAPSHOT]: Module added to Scene {0}.", scene.RegionInfo.RegionName);
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if (!m_servicesNotified)
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{
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m_hostname = scene.RegionInfo.ExternalHostName;
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m_snapStore = new SnapshotStore(m_snapsDir, m_gridinfo, m_listener_port, m_hostname);
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//Hand it the first scene, assuming that all scenes have the same BaseHTTPServer
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new DataRequestHandler(scene, this);
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if (m_dataServices != "" && m_dataServices != "noservices")
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NotifyDataServices(m_dataServices, "online");
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m_servicesNotified = true;
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}
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m_scenes.Add(scene);
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m_snapStore.AddScene(scene);
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Assembly currentasm = Assembly.GetExecutingAssembly();
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foreach (Type pluginType in currentasm.GetTypes())
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{
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if (pluginType.IsPublic)
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{
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if (!pluginType.IsAbstract)
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{
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if (pluginType.GetInterface("IDataSnapshotProvider") != null)
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{
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IDataSnapshotProvider module = (IDataSnapshotProvider)Activator.CreateInstance(pluginType);
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module.Initialize(scene, this);
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module.OnStale += MarkDataStale;
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m_dataproviders.Add(module);
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m_snapStore.AddProvider(module);
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m_log.Debug("[DATASNAPSHOT]: Added new data provider type: " + pluginType.Name);
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}
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}
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}
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}
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}
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public void RemoveRegion(Scene scene)
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{
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if (!m_enabled)
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return;
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m_log.Info("[DATASNAPSHOT]: Region " + scene.RegionInfo.RegionName + " is being removed, removing from indexing");
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Scene restartedScene = SceneForUUID(scene.RegionInfo.RegionID);
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m_scenes.Remove(restartedScene);
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m_snapStore.RemoveScene(restartedScene);
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//Getting around the fact that we can't remove objects from a collection we are enumerating over
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List<IDataSnapshotProvider> providersToRemove = new List<IDataSnapshotProvider>();
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foreach (IDataSnapshotProvider provider in m_dataproviders)
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{
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if (provider.GetParentScene == restartedScene)
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{
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providersToRemove.Add(provider);
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}
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}
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foreach (IDataSnapshotProvider provider in providersToRemove)
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{
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m_dataproviders.Remove(provider);
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m_snapStore.RemoveProvider(provider);
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}
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m_snapStore.RemoveScene(restartedScene);
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}
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public void PostInitialise()
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{
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}
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public void RegionLoaded(Scene scene)
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{
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if (!m_enabled)
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return;
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m_log.DebugFormat("[DATASNAPSHOT]: Marking scene {0} as stale.", scene.RegionInfo.RegionName);
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m_snapStore.ForceSceneStale(scene);
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}
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public void Close()
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{
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if (!m_enabled)
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return;
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if (m_enabled && m_dataServices != "" && m_dataServices != "noservices")
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NotifyDataServices(m_dataServices, "offline");
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}
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public string Name
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{
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get { return "External Data Generator"; }
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}
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public Type ReplaceableInterface
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{
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get { return null; }
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}
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#endregion
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#region Associated helper functions
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public Scene SceneForName(string name)
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{
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foreach (Scene scene in m_scenes)
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if (scene.RegionInfo.RegionName == name)
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return scene;
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return null;
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}
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public Scene SceneForUUID(UUID id)
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{
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foreach (Scene scene in m_scenes)
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if (scene.RegionInfo.RegionID == id)
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return scene;
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return null;
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}
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#endregion
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#region [Public] Snapshot storage functions
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/**
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* Reply to the http request
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*/
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public XmlDocument GetSnapshot(string regionName)
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{
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CheckStale();
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XmlDocument requestedSnap = new XmlDocument();
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requestedSnap.AppendChild(requestedSnap.CreateXmlDeclaration("1.0", null, null));
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requestedSnap.AppendChild(requestedSnap.CreateWhitespace("\r\n"));
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XmlNode regiondata = requestedSnap.CreateNode(XmlNodeType.Element, "regiondata", "");
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try
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{
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if (regionName == null || regionName == "")
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{
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XmlNode timerblock = requestedSnap.CreateNode(XmlNodeType.Element, "expire", "");
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timerblock.InnerText = m_period.ToString();
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regiondata.AppendChild(timerblock);
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regiondata.AppendChild(requestedSnap.CreateWhitespace("\r\n"));
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foreach (Scene scene in m_scenes)
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{
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regiondata.AppendChild(m_snapStore.GetScene(scene, requestedSnap));
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}
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}
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else
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{
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Scene scene = SceneForName(regionName);
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regiondata.AppendChild(m_snapStore.GetScene(scene, requestedSnap));
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}
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requestedSnap.AppendChild(regiondata);
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regiondata.AppendChild(requestedSnap.CreateWhitespace("\r\n"));
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}
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catch (XmlException e)
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{
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m_log.Warn("[DATASNAPSHOT]: XmlException while trying to load snapshot: " + e.ToString());
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requestedSnap = GetErrorMessage(regionName, e);
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}
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catch (Exception e)
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{
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m_log.Warn("[DATASNAPSHOT]: Caught unknown exception while trying to load snapshot: " + e.StackTrace);
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requestedSnap = GetErrorMessage(regionName, e);
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}
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return requestedSnap;
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}
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private XmlDocument GetErrorMessage(string regionName, Exception e)
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{
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XmlDocument errorMessage = new XmlDocument();
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XmlNode error = errorMessage.CreateNode(XmlNodeType.Element, "error", "");
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XmlNode region = errorMessage.CreateNode(XmlNodeType.Element, "region", "");
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region.InnerText = regionName;
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XmlNode exception = errorMessage.CreateNode(XmlNodeType.Element, "exception", "");
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exception.InnerText = e.ToString();
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error.AppendChild(region);
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error.AppendChild(exception);
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errorMessage.AppendChild(error);
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return errorMessage;
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}
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#endregion
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#region External data services
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private void NotifyDataServices(string servicesStr, string serviceName)
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{
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Stream reply = null;
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string delimStr = ";";
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char [] delimiter = delimStr.ToCharArray();
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string[] services = servicesStr.Split(delimiter);
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for (int i = 0; i < services.Length; i++)
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{
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string url = services[i].Trim();
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RestClient cli = new RestClient(url);
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cli.AddQueryParameter("service", serviceName);
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cli.AddQueryParameter("host", m_hostname);
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cli.AddQueryParameter("port", m_listener_port);
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cli.AddQueryParameter("secret", m_Secret.ToString());
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cli.RequestMethod = "GET";
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try
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{
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reply = cli.Request();
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}
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catch (WebException)
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{
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m_log.Warn("[DATASNAPSHOT]: Unable to notify " + url);
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}
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catch (Exception e)
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{
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m_log.Warn("[DATASNAPSHOT]: Ignoring unknown exception " + e.ToString());
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}
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byte[] response = new byte[1024];
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// int n = 0;
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try
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{
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// n = reply.Read(response, 0, 1024);
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reply.Read(response, 0, 1024);
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}
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catch (Exception e)
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{
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m_log.WarnFormat("[DATASNAPSHOT]: Unable to decode reply from data service. Ignoring. {0}", e.StackTrace);
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}
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// This is not quite working, so...
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// string responseStr = Util.UTF8.GetString(response);
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m_log.Info("[DATASNAPSHOT]: data service " + url + " notified. Secret: " + m_Secret);
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}
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}
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#endregion
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#region Latency-based update functions
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public void MarkDataStale(IDataSnapshotProvider provider)
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{
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//Behavior here: Wait m_period seconds, then update if there has not been a request in m_period seconds
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//or m_maxStales has been exceeded
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m_stales++;
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}
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private void CheckStale()
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{
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// Wrap check
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if (Environment.TickCount < m_lastUpdate)
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{
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m_lastUpdate = Environment.TickCount;
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}
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if (m_stales >= m_maxStales)
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{
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if (Environment.TickCount - m_lastUpdate >= 20000)
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{
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m_stales = 0;
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m_lastUpdate = Environment.TickCount;
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MakeEverythingStale();
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}
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}
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else
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{
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if (m_lastUpdate + 1000 * m_period < Environment.TickCount)
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{
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m_stales = 0;
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m_lastUpdate = Environment.TickCount;
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MakeEverythingStale();
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}
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}
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}
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public void MakeEverythingStale()
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{
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m_log.Debug("[DATASNAPSHOT]: Marking all scenes as stale.");
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foreach (Scene scene in m_scenes)
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{
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m_snapStore.ForceSceneStale(scene);
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}
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}
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#endregion
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}
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}
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