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