139 lines
5.4 KiB
C#
139 lines
5.4 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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using System;
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using System.Collections.Generic;
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using System.Threading;
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using OpenSim.Framework;
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using OpenMetaverse;
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namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Inventory
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{
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/// <summary>
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/// Cache root and system inventory folders to reduce number of potentially remote inventory calls and associated holdups.
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/// </summary>
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public class InventoryCache
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{
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private const double CACHE_EXPIRATION_SECONDS = 3600.0; // 1 hour
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private static ExpiringCache<UUID, InventoryFolderBase> m_RootFolders = new ExpiringCache<UUID, InventoryFolderBase>();
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private static ExpiringCache<UUID, Dictionary<AssetType, InventoryFolderBase>> m_FolderTypes = new ExpiringCache<UUID, Dictionary<AssetType, InventoryFolderBase>>();
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private static ExpiringCache<UUID, InventoryCollection> m_Inventories = new ExpiringCache<UUID, InventoryCollection>();
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public void Cache(UUID userID, InventoryFolderBase root)
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{
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m_RootFolders.AddOrUpdate(userID, root, CACHE_EXPIRATION_SECONDS);
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}
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public InventoryFolderBase GetRootFolder(UUID userID)
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{
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InventoryFolderBase root = null;
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if (m_RootFolders.TryGetValue(userID, out root))
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return root;
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return null;
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}
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public void Cache(UUID userID, AssetType type, InventoryFolderBase folder)
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{
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Dictionary<AssetType, InventoryFolderBase> ff = null;
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if (!m_FolderTypes.TryGetValue(userID, out ff))
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{
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ff = new Dictionary<AssetType, InventoryFolderBase>();
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m_FolderTypes.Add(userID, ff, CACHE_EXPIRATION_SECONDS);
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}
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// We need to lock here since two threads could potentially retrieve the same dictionary
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// and try to add a folder for that type simultaneously. Dictionary<>.Add() is not described as thread-safe in the SDK
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// even if the folders are identical.
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lock (ff)
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{
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if (!ff.ContainsKey(type))
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ff.Add(type, folder);
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}
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}
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public InventoryFolderBase GetFolderForType(UUID userID, AssetType type)
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{
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Dictionary<AssetType, InventoryFolderBase> ff = null;
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if (m_FolderTypes.TryGetValue(userID, out ff))
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{
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InventoryFolderBase f = null;
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lock (ff)
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{
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if (ff.TryGetValue(type, out f))
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return f;
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}
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}
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return null;
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}
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public void Cache(UUID userID, InventoryCollection inv)
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{
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m_Inventories.AddOrUpdate(userID, inv, 120);
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}
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public InventoryCollection GetFolderContent(UUID userID, UUID folderID)
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{
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InventoryCollection inv = null;
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InventoryCollection c;
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if (m_Inventories.TryGetValue(userID, out inv))
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{
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c = new InventoryCollection();
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c.OwnerID = userID;
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c.Folders = inv.Folders.FindAll(delegate(InventoryFolderBase f)
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{
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return f.ParentID == folderID;
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});
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c.Items = inv.Items.FindAll(delegate(InventoryItemBase i)
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{
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return i.Folder == folderID;
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});
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return c;
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}
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return null;
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}
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public List<InventoryItemBase> GetFolderItems(UUID userID, UUID folderID)
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{
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InventoryCollection inv = null;
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if (m_Inventories.TryGetValue(userID, out inv))
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{
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List<InventoryItemBase> items = inv.Items.FindAll(delegate(InventoryItemBase i)
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{
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return i.Folder == folderID;
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});
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return items;
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}
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return null;
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}
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}
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}
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