/* * 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.Threading; using libsecondlife; using OpenSim.Framework.Console; using OpenSim.Framework.AssetLoader.Filesystem; namespace OpenSim.Framework.Communications.Cache { public abstract class AssetServerBase : IAssetServer { protected IAssetReceiver _receiver; protected BlockingQueue<AssetRequest> _assetRequests; protected Thread _localAssetServerThread; protected IAssetProvider m_assetProviderPlugin; protected object syncLock = new object(); // Temporarily hardcoded - should be a plugin protected IAssetLoader assetLoader = new AssetLoaderFileSystem(); protected abstract void StoreAsset(AssetBase asset); protected abstract void CommitAssets(); /// <summary> /// This method must be implemented by a subclass to retrieve the asset named in the /// AssetRequest. If the asset is not found, null should be returned. /// </summary> /// <param name="req"></param> /// <returns></returns> protected abstract AssetBase GetAsset(AssetRequest req); /// <summary> /// Process an asset request. This method will call GetAsset(AssetRequest req) /// on the subclass. /// </summary> /// <param name="req"></param> protected virtual void ProcessRequest(AssetRequest req) { AssetBase asset = GetAsset(req); if (asset != null) { MainLog.Instance.Verbose( "ASSET", "Asset {0} received from asset server", req.AssetID); _receiver.AssetReceived(asset, req.IsTexture); } else { MainLog.Instance.Error( "ASSET", "Asset {0} not found by asset server", req.AssetID); _receiver.AssetNotFound(req.AssetID); } } public void LoadDefaultAssets() { MainLog.Instance.Verbose("ASSETSERVER", "Setting up asset database"); assetLoader.ForEachXmlAsset(StoreAsset); CommitAssets(); } public AssetServerBase() { MainLog.Instance.Verbose("ASSETSERVER", "Starting asset storage system"); _assetRequests = new BlockingQueue<AssetRequest>(); _localAssetServerThread = new Thread(RunRequests); _localAssetServerThread.IsBackground = true; _localAssetServerThread.Start(); } private void RunRequests() { while (true) // Since it's a 'blocking queue' { try { AssetRequest req = _assetRequests.Dequeue(); ProcessRequest(req); } catch (Exception e) { MainLog.Instance.Error("ASSETSERVER", e.Message); } } } public void SetReceiver(IAssetReceiver receiver) { _receiver = receiver; } public void RequestAsset(LLUUID assetID, bool isTexture) { AssetRequest req = new AssetRequest(); req.AssetID = assetID; req.IsTexture = isTexture; _assetRequests.Enqueue(req); MainLog.Instance.Verbose("ASSET", "Added {0} to request queue", assetID); } public virtual void UpdateAsset(AssetBase asset) { lock (syncLock) { m_assetProviderPlugin.UpdateAsset(asset); m_assetProviderPlugin.CommitAssets(); } } public void StoreAndCommitAsset(AssetBase asset) { lock (syncLock) { StoreAsset(asset); CommitAssets(); } } public virtual void Close() { _localAssetServerThread.Abort(); } public void SetServerInfo(string ServerUrl, string ServerKey) { } } }