/* * 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.Reflection; using System.Text; using System.Xml; using log4net; using OpenSim.Region.DataSnapshot.Interfaces; using OpenSim.Region.Framework.Scenes; namespace OpenSim.Region.DataSnapshot { public class SnapshotStore { #region Class Members private String m_directory = "unyuu"; //not an attempt at adding RM references to core SVN, honest private Dictionary m_scenes = null; private List m_providers = null; private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); private Dictionary m_gridinfo = null; private bool m_cacheEnabled = true; private string m_listener_port = "9000"; //TODO: Set default port over 9000 private string m_hostname = "127.0.0.1"; #endregion public SnapshotStore(string directory, Dictionary gridinfo, string port, string hostname) { m_directory = directory; m_scenes = new Dictionary(); m_providers = new List(); m_gridinfo = gridinfo; m_listener_port = port; m_hostname = hostname; if (Directory.Exists(m_directory)) { m_log.Info("[DATASNAPSHOT]: Response and fragment cache directory already exists."); } else { // Try to create the directory. m_log.Info("[DATASNAPSHOT]: Creating directory " + m_directory); try { Directory.CreateDirectory(m_directory); } catch (Exception e) { m_log.Error("[DATASNAPSHOT]: Failed to create directory " + m_directory, e); //This isn't a horrible problem, just disable cacheing. m_cacheEnabled = false; m_log.Error("[DATASNAPSHOT]: Could not create directory, response cache has been disabled."); } } } public void ForceSceneStale(Scene scene) { m_scenes[scene] = true; } #region Fragment storage public XmlNode GetFragment(IDataSnapshotProvider provider, XmlDocument factory) { XmlNode data = null; if (provider.Stale || !m_cacheEnabled) { data = provider.RequestSnapshotData(factory); if (m_cacheEnabled) { String path = DataFileNameFragment(provider.GetParentScene, provider.Name); using (XmlTextWriter snapXWriter = new XmlTextWriter(path, Encoding.Default)) { snapXWriter.Formatting = Formatting.Indented; snapXWriter.WriteStartDocument(); data.WriteTo(snapXWriter); snapXWriter.WriteEndDocument(); } } //mark provider as not stale, parent scene as stale provider.Stale = false; m_scenes[provider.GetParentScene] = true; m_log.Info("[DATASNAPSHOT]: Generated fragment response for provider type " + provider.Name); } else { String path = DataFileNameFragment(provider.GetParentScene, provider.Name); XmlDocument fragDocument = new XmlDocument(); fragDocument.PreserveWhitespace = true; fragDocument.Load(path); foreach (XmlNode node in fragDocument) { data = factory.ImportNode(node, true); } m_log.Info("[DATASNAPSHOT]: Retrieved fragment response for provider type " + provider.Name); } return data; } #endregion #region Response storage public XmlNode GetScene(Scene scene, XmlDocument factory) { m_log.Debug("[DATASNAPSHOT]: Data requested for scene " + scene.RegionInfo.RegionName); if (!m_scenes.ContainsKey(scene)) { m_scenes.Add(scene, true); //stale by default } XmlNode regionElement = null; if (!m_scenes[scene]) { m_log.Info("[DATASNAPSHOT]: Attempting to retrieve snapshot from cache."); //get snapshot from cache String path = DataFileNameScene(scene); XmlDocument fragDocument = new XmlDocument(); fragDocument.PreserveWhitespace = true; fragDocument.Load(path); foreach (XmlNode node in fragDocument) { regionElement = factory.ImportNode(node, true); } m_log.Info("[DATASNAPSHOT]: Obtained snapshot from cache for " + scene.RegionInfo.RegionName); } else { m_log.Info("[DATASNAPSHOT]: Attempting to generate snapshot."); //make snapshot regionElement = MakeRegionNode(scene, factory); regionElement.AppendChild(GetGridSnapshotData(factory)); XmlNode regionData = factory.CreateNode(XmlNodeType.Element, "data", ""); foreach (IDataSnapshotProvider dataprovider in m_providers) { if (dataprovider.GetParentScene == scene) { regionData.AppendChild(GetFragment(dataprovider, factory)); } } regionElement.AppendChild(regionData); factory.AppendChild(regionElement); //save snapshot String path = DataFileNameScene(scene); using (XmlTextWriter snapXWriter = new XmlTextWriter(path, Encoding.Default)) { snapXWriter.Formatting = Formatting.Indented; snapXWriter.WriteStartDocument(); regionElement.WriteTo(snapXWriter); snapXWriter.WriteEndDocument(); } m_scenes[scene] = false; m_log.Info("[DATASNAPSHOT]: Generated new snapshot for " + scene.RegionInfo.RegionName); } return regionElement; } #endregion #region Helpers private string DataFileNameFragment(Scene scene, String fragmentName) { return Path.Combine(m_directory, Path.ChangeExtension(scene.RegionInfo.RegionName + "_" + fragmentName, "xml")); } private string DataFileNameScene(Scene scene) { return Path.Combine(m_directory, Path.ChangeExtension(scene.RegionInfo.RegionName, "xml")); //return (m_snapsDir + Path.DirectorySeparatorChar + scene.RegionInfo.RegionName + ".xml"); } private XmlNode MakeRegionNode(Scene scene, XmlDocument basedoc) { XmlNode docElement = basedoc.CreateNode(XmlNodeType.Element, "region", ""); XmlAttribute attr = basedoc.CreateAttribute("category"); attr.Value = GetRegionCategory(scene); docElement.Attributes.Append(attr); attr = basedoc.CreateAttribute("entities"); attr.Value = scene.Entities.Count.ToString(); docElement.Attributes.Append(attr); //attr = basedoc.CreateAttribute("parcels"); //attr.Value = scene.LandManager.landList.Count.ToString(); //docElement.Attributes.Append(attr); XmlNode infoblock = basedoc.CreateNode(XmlNodeType.Element, "info", ""); XmlNode infopiece = basedoc.CreateNode(XmlNodeType.Element, "uuid", ""); infopiece.InnerText = scene.RegionInfo.RegionID.ToString(); infoblock.AppendChild(infopiece); infopiece = basedoc.CreateNode(XmlNodeType.Element, "url", ""); infopiece.InnerText = "http://" + m_hostname + ":" + m_listener_port; infoblock.AppendChild(infopiece); infopiece = basedoc.CreateNode(XmlNodeType.Element, "name", ""); infopiece.InnerText = scene.RegionInfo.RegionName; infoblock.AppendChild(infopiece); infopiece = basedoc.CreateNode(XmlNodeType.Element, "handle", ""); infopiece.InnerText = scene.RegionInfo.RegionHandle.ToString(); infoblock.AppendChild(infopiece); docElement.AppendChild(infoblock); m_log.Debug("[DATASNAPSHOT]: Generated region node"); return docElement; } private String GetRegionCategory(Scene scene) { //Boolean choice between: // "PG" - Mormontown // "Mature" - Sodom and Gomorrah if (scene.RegionInfo.RegionSettings.Maturity == 1) { return "Mature"; } else if (scene.RegionInfo.RegionSettings.Maturity == 0) { return "PG"; } else { return "Unknown"; } } private XmlNode GetGridSnapshotData(XmlDocument factory) { XmlNode griddata = factory.CreateNode(XmlNodeType.Element, "grid", ""); foreach (KeyValuePair GridData in m_gridinfo) { //TODO: make it lowercase tag names for diva XmlNode childnode = factory.CreateNode(XmlNodeType.Element, GridData.Key, ""); childnode.InnerText = GridData.Value; griddata.AppendChild(childnode); } m_log.Debug("[DATASNAPSHOT]: Got grid snapshot data"); return griddata; } #endregion #region Manage internal collections public void AddScene(Scene newScene) { m_scenes.Add(newScene, true); } public void RemoveScene(Scene deadScene) { m_scenes.Remove(deadScene); } public void AddProvider(IDataSnapshotProvider newProvider) { m_providers.Add(newProvider); } public void RemoveProvider(IDataSnapshotProvider deadProvider) { m_providers.Remove(deadProvider); } #endregion } }