/OpenSim/Services/Connectors/Asset/AssetServiceConnector.cs
C# | 332 lines | 236 code | 61 blank | 35 comment | 53 complexity | e280f279ddced3e72f0295d0f017e9c9 MD5 | raw file
- /*
- * 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 OpenSimulator 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 log4net;
- using System;
- using System.Collections.Generic;
- using System.IO;
- using System.Reflection;
- using Nini.Config;
- using OpenSim.Framework;
- using OpenSim.Framework.Console;
- using OpenSim.Framework.Communications;
- using OpenSim.Services.Interfaces;
- using OpenMetaverse;
- namespace OpenSim.Services.Connectors
- {
- public class AssetServicesConnector : IAssetService
- {
- private static readonly ILog m_log =
- LogManager.GetLogger(
- MethodBase.GetCurrentMethod().DeclaringType);
- private string m_ServerURI = String.Empty;
- private IImprovedAssetCache m_Cache = null;
- private delegate void AssetRetrievedEx(AssetBase asset);
- private List<AssetRetrievedEx> AssetRetrievedExList;
- // Keeps track of concurrent requests for the same asset, so that it's only loaded once.
- // Maps: Asset ID -> Handlers which will be called when the asset has been loaded
- private Dictionary<string, List<AssetRetrievedEx>> m_AssetHandlers = new Dictionary<string, List<AssetRetrievedEx>>();
- public AssetServicesConnector()
- {
- }
- public AssetServicesConnector(string serverURI)
- {
- m_ServerURI = serverURI.TrimEnd('/');
- }
- public AssetServicesConnector(IConfigSource source)
- {
- Initialise(source);
- }
- public virtual void Initialise(IConfigSource source)
- {
- IConfig assetConfig = source.Configs["AssetService"];
- if (assetConfig == null)
- {
- m_log.Error("[ASSET CONNECTOR]: AssetService missing from OpenSim.ini");
- throw new Exception("Asset connector init error");
- }
- string serviceURI = assetConfig.GetString("AssetServerURI",
- String.Empty);
- if (serviceURI == String.Empty)
- {
- m_log.Error("[ASSET CONNECTOR]: No Server URI named in section AssetService");
- throw new Exception("Asset connector init error");
- }
- m_ServerURI = serviceURI;
- }
- protected void SetCache(IImprovedAssetCache cache)
- {
- m_Cache = cache;
- }
- public AssetBase Get(string id)
- {
- // m_log.DebugFormat("[ASSET SERVICE CONNECTOR]: Synchronous get request for {0}", id);
- string uri = m_ServerURI + "/assets/" + id;
- AssetBase asset = null;
- if (m_Cache != null)
- asset = m_Cache.Get(id);
- if (asset == null)
- {
- asset = SynchronousRestObjectRequester.
- MakeRequest<int, AssetBase>("GET", uri, 0);
- if (m_Cache != null)
- m_Cache.Cache(asset);
- }
- return asset;
- }
- public AssetBase GetCached(string id)
- {
- // m_log.DebugFormat("[ASSET SERVICE CONNECTOR]: Cache request for {0}", id);
- if (m_Cache != null)
- return m_Cache.Get(id);
- return null;
- }
- public AssetMetadata GetMetadata(string id)
- {
- if (m_Cache != null)
- {
- AssetBase fullAsset = m_Cache.Get(id);
- if (fullAsset != null)
- return fullAsset.Metadata;
- }
- string uri = m_ServerURI + "/assets/" + id + "/metadata";
- AssetMetadata asset = SynchronousRestObjectRequester.
- MakeRequest<int, AssetMetadata>("GET", uri, 0);
- return asset;
- }
- public byte[] GetData(string id)
- {
- if (m_Cache != null)
- {
- AssetBase fullAsset = m_Cache.Get(id);
- if (fullAsset != null)
- return fullAsset.Data;
- }
- RestClient rc = new RestClient(m_ServerURI);
- rc.AddResourcePath("assets");
- rc.AddResourcePath(id);
- rc.AddResourcePath("data");
- rc.RequestMethod = "GET";
- Stream s = rc.Request();
- if (s == null)
- return null;
- if (s.Length > 0)
- {
- byte[] ret = new byte[s.Length];
- s.Read(ret, 0, (int)s.Length);
- return ret;
- }
- return null;
- }
- public bool Get(string id, Object sender, AssetRetrieved handler)
- {
- // m_log.DebugFormat("[ASSET SERVICE CONNECTOR]: Potentially asynchronous get request for {0}", id);
- string uri = m_ServerURI + "/assets/" + id;
- AssetBase asset = null;
- if (m_Cache != null)
- asset = m_Cache.Get(id);
- if (asset == null)
- {
- lock (m_AssetHandlers)
- {
- AssetRetrievedEx handlerEx = new AssetRetrievedEx(delegate(AssetBase _asset) { handler(id, sender, _asset); });
- List<AssetRetrievedEx> handlers;
- if (m_AssetHandlers.TryGetValue(id, out handlers))
- {
- // Someone else is already loading this asset. It will notify our handler when done.
- handlers.Add(handlerEx);
- return true;
- }
- // Load the asset ourselves
- handlers = new List<AssetRetrievedEx>();
- handlers.Add(handlerEx);
- m_AssetHandlers.Add(id, handlers);
- }
- bool success = false;
- try
- {
- AsynchronousRestObjectRequester.MakeRequest<int, AssetBase>("GET", uri, 0,
- delegate(AssetBase a)
- {
- if (m_Cache != null)
- m_Cache.Cache(a);
- List<AssetRetrievedEx> handlers;
- lock (m_AssetHandlers)
- {
- handlers = m_AssetHandlers[id];
- m_AssetHandlers.Remove(id);
- }
- foreach(AssetRetrievedEx h in handlers)
- h.Invoke(a);
- });
-
- success = true;
- }
- finally
- {
- if (!success)
- {
- lock (m_AssetHandlers)
- {
- m_AssetHandlers.Remove(id);
- }
- }
- }
- }
- else
- {
- handler(id, sender, asset);
- }
- return true;
- }
- public string Store(AssetBase asset)
- {
- if (asset.Temporary || asset.Local)
- {
- if (m_Cache != null)
- m_Cache.Cache(asset);
- return asset.ID;
- }
- string uri = m_ServerURI + "/assets/";
- string newID = string.Empty;
- try
- {
- newID = SynchronousRestObjectRequester.
- MakeRequest<AssetBase, string>("POST", uri, asset);
- }
- catch (Exception e)
- {
- m_log.WarnFormat("[ASSET CONNECTOR]: Unable to send asset {0} to asset server. Reason: {1}", asset.ID, e.Message);
- }
- if (newID != String.Empty)
- {
- // Placing this here, so that this work with old asset servers that don't send any reply back
- // SynchronousRestObjectRequester returns somethins that is not an empty string
- if (newID != null)
- asset.ID = newID;
- if (m_Cache != null)
- m_Cache.Cache(asset);
- }
- return newID;
- }
- public bool UpdateContent(string id, byte[] data)
- {
- AssetBase asset = null;
- if (m_Cache != null)
- asset = m_Cache.Get(id);
- if (asset == null)
- {
- AssetMetadata metadata = GetMetadata(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 = m_ServerURI + "/assets/" + id;
- if (SynchronousRestObjectRequester.
- MakeRequest<AssetBase, bool>("POST", uri, asset))
- {
- if (m_Cache != null)
- m_Cache.Cache(asset);
- return true;
- }
- return false;
- }
- public bool Delete(string id)
- {
- string uri = m_ServerURI + "/assets/" + id;
- if (SynchronousRestObjectRequester.
- MakeRequest<int, bool>("DELETE", uri, 0))
- {
- if (m_Cache != null)
- m_Cache.Expire(id);
- return true;
- }
- return false;
- }
- }
- }