/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSim Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ using System; using System.Collections.Generic; using System.IO; using System.Net; using System.Reflection; using System.Text; using System.Timers; using System.Xml; using OpenMetaverse; using log4net; using Nini.Config; using OpenSim.Framework; using OpenSim.Framework.Communications; using OpenSim.Region.DataSnapshot.Interfaces; using OpenSim.Region.Environment.Interfaces; using OpenSim.Region.Environment.Scenes; using OpenMetaverse.Packets; namespace OpenSim.Region.DataSnapshot { public class DataSnapshotManager : IRegionModule, IDataSnapshot { #region Class members //Information from config private bool m_enabled = false; private bool m_configLoaded = false; private List m_disabledModules = new List(); private Dictionary m_gridinfo = new Dictionary(); private string m_snapsDir = "DataSnapshot"; private string m_exposure_level = "minimum"; //Lists of stuff we need private List m_scenes = new List(); private List m_dataproviders = new List(); //Various internal objects private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); internal object m_syncInit = new object(); //DataServices and networking private string m_dataServices = "noservices"; public string m_listener_port = "9000"; //TODO: Set default port over 9000 public string m_hostname = "127.0.0.1"; //Update timers private Timer m_periodic = null; private int m_period = 20; // in seconds private int m_maxStales = 500; private int m_stales = 0; private Timer m_passedCheck = null; private bool m_periodPassed = false; //Program objects private SnapshotStore m_snapStore = null; #endregion #region Properties public string ExposureLevel { get { return m_exposure_level; } } #endregion #region IRegionModule public void Initialise(Scene scene, IConfigSource config) { if (!m_configLoaded) { m_configLoaded = true; m_log.Info("[DATASNAPSHOT]: Loading configuration"); //Read from the config for options lock (m_syncInit) { try { m_enabled = config.Configs["DataSnapshot"].GetBoolean("index_sims", m_enabled); if (config.Configs["Startup"].GetBoolean("gridmode", true)) { m_gridinfo.Add("gridserverURL", config.Configs["Network"].GetString("grid_server_url", "harbl")); m_gridinfo.Add("userserverURL", config.Configs["Network"].GetString("user_server_url", "harbl")); m_gridinfo.Add("assetserverURL", config.Configs["Network"].GetString("asset_server_url", "harbl")); } else { //Non gridmode stuff } m_gridinfo.Add("Name", config.Configs["DataSnapshot"].GetString("gridname", "harbl")); m_exposure_level = config.Configs["DataSnapshot"].GetString("data_exposure", m_exposure_level); m_period = config.Configs["DataSnapshot"].GetInt("default_snapshot_period", m_period); m_maxStales = config.Configs["DataSnapshot"].GetInt("max_changes_before_update", m_maxStales); m_snapsDir = config.Configs["DataSnapshot"].GetString("snapshot_cache_directory", m_snapsDir); m_dataServices = config.Configs["DataSnapshot"].GetString("data_services", m_dataServices); m_listener_port = config.Configs["Network"].GetString("http_listener_port", m_listener_port); String[] annoying_string_array = config.Configs["DataSnapshot"].GetString("disable_modules", "").Split(".".ToCharArray()); foreach (String bloody_wanker in annoying_string_array) { m_disabledModules.Add(bloody_wanker); } } catch (Exception) { m_log.Info("[DATASNAPSHOT]: Could not load configuration. DataSnapshot will be disabled."); m_enabled = false; return; } } if (m_enabled) { //Create update timer m_periodic = new Timer(); m_periodic.Interval = m_period * 1000; m_periodic.Elapsed += SnapshotTimerCallback; //Create update eligibility timer m_passedCheck = new Timer(); m_passedCheck.Interval = m_period * 1000; m_passedCheck.Elapsed += UpdateEligibilityCallback; m_passedCheck.Start(); //Hand it the first scene, assuming that all scenes have the same BaseHTTPServer new DataRequestHandler(scene, this); m_hostname = scene.RegionInfo.ExternalHostName; m_snapStore = new SnapshotStore(m_snapsDir, m_gridinfo, m_listener_port, m_hostname); MakeEverythingStale(); if (m_dataServices != "" && m_dataServices != "noservices") NotifyDataServices(m_dataServices, "online"); } } if (m_enabled) { m_log.Info("[DATASNAPSHOT]: Scene added to module."); m_snapStore.AddScene(scene); m_scenes.Add(scene); Assembly currentasm = Assembly.GetExecutingAssembly(); foreach (Type pluginType in currentasm.GetTypes()) { if (pluginType.IsPublic) { if (!pluginType.IsAbstract) { if (pluginType.GetInterface("IDataSnapshotProvider") != null) { IDataSnapshotProvider module = (IDataSnapshotProvider)Activator.CreateInstance(pluginType); module.Initialize(scene, this); module.OnStale += MarkDataStale; m_dataproviders.Add(module); m_snapStore.AddProvider(module); m_log.Info("[DATASNAPSHOT]: Added new data provider type: " + pluginType.Name); } } } } //scene.OnRestart += OnSimRestart; scene.EventManager.OnShutdown += delegate() { OnSimRestart(scene.RegionInfo); }; } else { m_log.Warn("[DATASNAPSHOT]: Data snapshot disabled, not adding scene to module (or anything else)."); } } public void Close() { if (m_dataServices != "" && m_dataServices != "noservices") NotifyDataServices(m_dataServices, "offline"); } public bool IsSharedModule { get { return true; } } public string Name { get { return "External Data Generator"; } } public void PostInitialise() { } #endregion #region Associated helper functions public Scene SceneForName(string name) { foreach (Scene scene in m_scenes) if (scene.RegionInfo.RegionName == name) return scene; return null; } public Scene SceneForUUID(UUID id) { foreach (Scene scene in m_scenes) if (scene.RegionInfo.RegionID == id) return scene; return null; } #endregion #region [Public] Snapshot storage functions /** * Reply to the http request */ public XmlDocument GetSnapshot(string regionName) { XmlDocument requestedSnap = new XmlDocument(); requestedSnap.AppendChild(requestedSnap.CreateXmlDeclaration("1.0", null, null)); requestedSnap.AppendChild(requestedSnap.CreateWhitespace("\r\n")); XmlNode regiondata = requestedSnap.CreateNode(XmlNodeType.Element, "regiondata", ""); try { if (regionName == null || regionName == "") { XmlNode timerblock = requestedSnap.CreateNode(XmlNodeType.Element, "expire", ""); timerblock.InnerText = m_period.ToString(); regiondata.AppendChild(timerblock); regiondata.AppendChild(requestedSnap.CreateWhitespace("\r\n")); foreach (Scene scene in m_scenes) { regiondata.AppendChild(m_snapStore.GetScene(scene, requestedSnap)); } } else { Scene scene = SceneForName(regionName); regiondata.AppendChild(m_snapStore.GetScene(scene, requestedSnap)); } requestedSnap.AppendChild(regiondata); regiondata.AppendChild(requestedSnap.CreateWhitespace("\r\n")); } catch (XmlException e) { m_log.Warn("[DATASNAPSHOT]: XmlException while trying to load snapshot: " + e.ToString()); requestedSnap = GetErrorMessage(regionName, e); } catch (Exception e) { m_log.Warn("[DATASNAPSHOT]: Caught unknown exception while trying to load snapshot: " + e.StackTrace); requestedSnap = GetErrorMessage(regionName, e); } return requestedSnap; } private XmlDocument GetErrorMessage(string regionName, Exception e) { XmlDocument errorMessage = new XmlDocument(); XmlNode error = errorMessage.CreateNode(XmlNodeType.Element, "error", ""); XmlNode region = errorMessage.CreateNode(XmlNodeType.Element, "region", ""); region.InnerText = regionName; XmlNode exception = errorMessage.CreateNode(XmlNodeType.Element, "exception", ""); exception.InnerText = e.ToString(); error.AppendChild(region); error.AppendChild(exception); errorMessage.AppendChild(error); return errorMessage; } #endregion #region External data services private void NotifyDataServices(string servicesStr, string serviceName) { Stream reply = null; string delimStr = ";"; char [] delimiter = delimStr.ToCharArray(); string[] services = servicesStr.Split(delimiter); for (int i = 0; i < services.Length; i++) { string url = services[i].Trim(); RestClient cli = new RestClient(url); cli.AddQueryParameter("service", serviceName); cli.AddQueryParameter("host", m_hostname); cli.AddQueryParameter("port", m_listener_port); cli.RequestMethod = "GET"; try { reply = cli.Request(); } catch (WebException) { m_log.Warn("[DATASNAPSHOT] Unable to notify " + url); } catch (Exception e) { m_log.Warn("[DATASNAPSHOT] Ignoring unknown exception " + e.ToString()); } byte[] response = new byte[1024]; // int n = 0; try { // n = reply.Read(response, 0, 1024); reply.Read(response, 0, 1024); } catch (Exception e) { m_log.WarnFormat("[DATASNAPSHOT] Unable to decode reply from data service. Ignoring. {0}", e.StackTrace); } // This is not quite working, so... // string responseStr = Encoding.UTF8.GetString(response); m_log.Info("[DATASNAPSHOT] data service notified: " + url); } } #endregion #region Latency-based update functions public void MarkDataStale(IDataSnapshotProvider provider) { //Behavior here: Wait m_period seconds, then update if there has not been a request in m_period seconds //or m_maxStales has been exceeded m_stales++; if ((m_stales >= m_maxStales) && m_periodPassed) SnapshotTimerCallback(m_periodic, null); else if (m_periodic.Enabled == false) m_periodic.Start(); else { m_periodic.Stop(); m_periodic.Start(); } } private void SnapshotTimerCallback(object timer, ElapsedEventArgs args) { m_log.Debug("[DATASNAPSHOT]: Marking scenes for snapshot updates."); //Finally generate those snapshot updates MakeEverythingStale(); //Stop the update delay timer m_periodic.Stop(); //Reset the eligibility flag and timer m_periodPassed = false; m_passedCheck.Stop(); m_passedCheck.Start(); } private void UpdateEligibilityCallback(object timer, ElapsedEventArgs args) { //Set eligibility, so we can start making updates m_periodPassed = true; } public void MakeEverythingStale() { m_log.Debug("[DATASNAPSHOT]: Marking all scenes as stale."); foreach (Scene scene in m_scenes) { m_snapStore.ForceSceneStale(scene); } } #endregion public void OnSimRestart(RegionInfo thisRegion) { m_log.Info("[DATASNAPSHOT]: Region " + thisRegion.RegionName + " is restarting, removing from indexing"); Scene restartedScene = SceneForUUID(thisRegion.RegionID); m_scenes.Remove(restartedScene); m_snapStore.RemoveScene(restartedScene); //Getting around the fact that we can't remove objects from a collection we are enumerating over List providersToRemove = new List(); foreach (IDataSnapshotProvider provider in m_dataproviders) { if (provider.GetParentScene == restartedScene) { providersToRemove.Add(provider); } } foreach (IDataSnapshotProvider provider in providersToRemove) { m_dataproviders.Remove(provider); m_snapStore.RemoveProvider(provider); } m_snapStore.RemoveScene(restartedScene); } } }