Files
opensim/OpenSim/Framework/Communications/Cache/CachedUserInfo.cs
Melanie c72f78215b Backport the fixes to WebFetchInventoryDescendents to the UDP
InventoryDescendents packet. Testing has shown that UDP inventory now
works flawlessly and, unlike CAPS inventory, doesn't download the entire
agent inventory on start. Neither does it incessantly re-request folder
NULL_KEY. Therefore, I have disabled CAPS inventory.
2009-11-04 01:56:19 +00:00

848 lines
34 KiB
C#

/*
* 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.Reflection;
using log4net;
using OpenMetaverse;
using OpenSim.Services.Interfaces;
namespace OpenSim.Framework.Communications.Cache
{
internal delegate void AddItemDelegate(InventoryItemBase itemInfo);
internal delegate void UpdateItemDelegate(InventoryItemBase itemInfo);
internal delegate void DeleteItemDelegate(UUID itemID);
internal delegate void QueryItemDelegate(UUID itemID);
internal delegate void QueryFolderDelegate(UUID folderID);
internal delegate void CreateFolderDelegate(string folderName, UUID folderID, ushort folderType, UUID parentID);
internal delegate void MoveFolderDelegate(UUID folderID, UUID parentID);
internal delegate void PurgeFolderDelegate(UUID folderID);
internal delegate void UpdateFolderDelegate(string name, UUID folderID, ushort type, UUID parentID);
internal delegate void SendInventoryDescendentsDelegate(
IClientAPI client, UUID folderID, bool fetchFolders, bool fetchItems);
public delegate void OnItemReceivedDelegate(UUID itemID);
public delegate void OnInventoryReceivedDelegate(UUID userID);
/// <summary>
/// Stores user profile and inventory data received from backend services for a particular user.
/// </summary>
public class CachedUserInfo
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
//// <value>
/// Fired when a particular item has been received from the inventory service
/// </value>
public event OnItemReceivedDelegate OnItemReceived;
/// <value>
/// Fired once the entire inventory has been received for the user
/// </value>
public event OnInventoryReceivedDelegate OnInventoryReceived;
/// <summary>
/// The comms manager holds references to services (user, grid, inventory, etc.)
/// </summary>
private readonly IInventoryService m_InventoryService;
public UserProfileData UserProfile { get { return m_userProfile; } }
private UserProfileData m_userProfile;
/// <summary>
/// Have we received the user's inventory from the inventory service?
/// </summary>
public bool HasReceivedInventory { get { return m_hasReceivedInventory; } }
private bool m_hasReceivedInventory;
/// <summary>
/// Inventory requests waiting for receipt of this user's inventory from the inventory service.
/// </summary>
private readonly IList<IInventoryRequest> m_pendingRequests = new List<IInventoryRequest>();
/// <summary>
/// The root folder of this user's inventory. Returns null if the root folder has not yet been received.
/// </summary>
public InventoryFolderImpl RootFolder { get { return m_rootFolder; } }
private InventoryFolderImpl m_rootFolder;
public UUID SessionID
{
get { return m_session_id; }
set { m_session_id = value; }
}
private UUID m_session_id = UUID.Zero;
/// <summary>
/// Constructor
/// </summary>
/// <param name="commsManager"></param>
/// <param name="userProfile"></param>
public CachedUserInfo(IInventoryService invService, UserProfileData userProfile)
{
m_userProfile = userProfile;
m_InventoryService = invService;
}
/// <summary>
/// This allows a request to be added to be processed once we receive a user's inventory
/// from the inventory service. If we already have the inventory, the request
/// is executed immediately instead.
/// </summary>
/// <param name="parent"></param>
protected void AddRequest(IInventoryRequest request)
{
lock (m_pendingRequests)
{
if (HasReceivedInventory)
{
request.Execute();
}
else
{
m_pendingRequests.Add(request);
}
}
}
/// <summary>
/// Helper function for InventoryReceive() - Store a folder temporarily until we've received entire folder list
/// </summary>
/// <param name="folder"></param>
private void AddFolderToDictionary(InventoryFolderImpl folder, IDictionary<UUID, IList<InventoryFolderImpl>> dictionary)
{
UUID parentFolderId = folder.ParentID;
if (dictionary.ContainsKey(parentFolderId))
{
dictionary[parentFolderId].Add(folder);
}
else
{
IList<InventoryFolderImpl> folders = new List<InventoryFolderImpl>();
folders.Add(folder);
dictionary[parentFolderId] = folders;
}
}
/// <summary>
/// Recursively, in depth-first order, add all the folders we've received (stored
/// in a dictionary indexed by parent ID) into the tree that describes user folder
/// heirarchy
/// Any folder that is resolved into the tree is also added to resolvedFolderDictionary,
/// indexed by folder ID.
/// </summary>
/// <param name="parentId">
/// A <see cref="UUID"/>
/// </param>
private void ResolveReceivedFolders(InventoryFolderImpl parentFolder,
IDictionary<UUID, IList<InventoryFolderImpl>> receivedFolderDictionary,
IDictionary<UUID, InventoryFolderImpl> resolvedFolderDictionary)
{
if (receivedFolderDictionary.ContainsKey(parentFolder.ID))
{
List<InventoryFolderImpl> resolvedFolders = new List<InventoryFolderImpl>(); // Folders we've resolved with this invocation
foreach (InventoryFolderImpl folder in receivedFolderDictionary[parentFolder.ID])
{
if (parentFolder.ContainsChildFolder(folder.ID))
{
m_log.WarnFormat(
"[INVENTORY CACHE]: Received folder {0} {1} from inventory service which has already been received",
folder.Name, folder.ID);
}
else
{
if (resolvedFolderDictionary.ContainsKey(folder.ID))
{
m_log.WarnFormat(
"[INVENTORY CACHE]: Received folder {0} {1} from inventory service has already been received but with different parent",
folder.Name, folder.ID);
}
else
{
resolvedFolders.Add(folder);
resolvedFolderDictionary[folder.ID] = folder;
parentFolder.AddChildFolder(folder);
}
}
} // foreach (folder in pendingCategorizationFolders[parentFolder.ID])
receivedFolderDictionary.Remove(parentFolder.ID);
foreach (InventoryFolderImpl folder in resolvedFolders)
ResolveReceivedFolders(folder, receivedFolderDictionary, resolvedFolderDictionary);
} // if (receivedFolderDictionary.ContainsKey(parentFolder.ID))
}
/// <summary>
/// Drop all cached inventory.
/// </summary>
public void DropInventory()
{
m_log.Debug("[INVENTORY CACHE]: DropInventory called");
// Make sure there aren't pending requests around when we do this
// FIXME: There is still a race condition where an inventory operation can be requested (since these aren't being locked).
// Will have to extend locking to exclude this very soon.
lock (m_pendingRequests)
{
m_hasReceivedInventory = false;
m_rootFolder = null;
}
}
/// <summary>
/// Fetch inventory for this user.
/// </summary>
/// This has to be executed as a separate step once user information is retreived.
/// This will occur synchronously if the inventory service is in the same process as this class, and
/// asynchronously otherwise.
public void FetchInventory()
{
m_InventoryService.GetUserInventory(UserProfile.ID, InventoryReceive);
}
/// <summary>
/// Callback invoked when the inventory is received from an async request to the inventory service
/// </summary>
/// <param name="userID"></param>
/// <param name="inventoryCollection"></param>
public void InventoryReceive(ICollection<InventoryFolderImpl> folders, ICollection<InventoryItemBase> items)
{
// FIXME: Exceptions thrown upwards never appear on the console. Could fix further up if these
// are simply being swallowed
try
{
// collection of all received folders, indexed by their parent ID
IDictionary<UUID, IList<InventoryFolderImpl>> receivedFolders =
new Dictionary<UUID, IList<InventoryFolderImpl>>();
// collection of all folders that have been placed into the folder heirarchy starting at m_rootFolder
// This dictonary exists so we don't have to do an InventoryFolderImpl.FindFolder(), which is O(n) on the
// number of folders in our inventory.
// Maybe we should make this structure a member so we can skip InventoryFolderImpl.FindFolder() calls later too?
IDictionary<UUID, InventoryFolderImpl> resolvedFolders =
new Dictionary<UUID, InventoryFolderImpl>();
// Take all received folders, find the root folder, and put ther rest into
// the pendingCategorizationFolders collection
foreach (InventoryFolderImpl folder in folders)
AddFolderToDictionary(folder, receivedFolders);
if (!receivedFolders.ContainsKey(UUID.Zero))
throw new Exception("Database did not return a root inventory folder");
else
{
IList<InventoryFolderImpl> rootFolderList = receivedFolders[UUID.Zero];
m_rootFolder = rootFolderList[0];
resolvedFolders[m_rootFolder.ID] = m_rootFolder;
if (rootFolderList.Count > 1)
{
for (int i = 1; i < rootFolderList.Count; i++)
{
m_log.WarnFormat(
"[INVENTORY CACHE]: Discarding extra root folder {0}. Using previously received root folder {1}",
rootFolderList[i].ID, RootFolder.ID);
}
}
receivedFolders.Remove(UUID.Zero);
}
// Now take the pendingCategorizationFolders collection, and turn that into a tree,
// with the root being RootFolder
if (RootFolder != null)
ResolveReceivedFolders(RootFolder, receivedFolders, resolvedFolders);
// Generate a warning for folders that are not part of the heirarchy
foreach (KeyValuePair<UUID, IList<InventoryFolderImpl>> folderList in receivedFolders)
{
foreach (InventoryFolderImpl folder in folderList.Value)
m_log.WarnFormat("[INVENTORY CACHE]: Malformed Database: Unresolved Pending Folder {0}", folder.Name);
}
// Take all ther received items and put them into the folder tree heirarchy
foreach (InventoryItemBase item in items) {
InventoryFolderImpl folder = resolvedFolders.ContainsKey(item.Folder) ? resolvedFolders[item.Folder] : null;
ItemReceive(item, folder);
}
}
catch (Exception e)
{
m_log.ErrorFormat("[INVENTORY CACHE]: Error processing inventory received from inventory service, {0}", e);
}
// Deal with pending requests
lock (m_pendingRequests)
{
// We're going to change inventory status within the lock to avoid a race condition
// where requests are processed after the AddRequest() method has been called.
m_hasReceivedInventory = true;
foreach (IInventoryRequest request in m_pendingRequests)
{
request.Execute();
}
}
if (OnInventoryReceived != null)
OnInventoryReceived(UserProfile.ID);
}
/// <summary>
/// Callback invoked when an item is received from an async request to the inventory service.
///
/// We're assuming here that items are always received after all the folders
/// received.
/// If folder is null, we will search for it starting from RootFolder (an O(n) operation),
/// otherwise we'll just put it into folder
/// </summary>
/// <param name="folderInfo"></param>
private void ItemReceive(InventoryItemBase itemInfo, InventoryFolderImpl folder)
{
// m_log.DebugFormat(
// "[INVENTORY CACHE]: Received item {0} {1} for user {2}",
// itemInfo.Name, itemInfo.ID, userID);
if (folder == null && RootFolder != null)
folder = RootFolder.FindFolder(itemInfo.Folder);
if (null == folder)
{
m_log.WarnFormat(
"Received item {0} {1} but its folder {2} does not exist",
itemInfo.Name, itemInfo.ID, itemInfo.Folder);
return;
}
lock (folder.Items)
{
folder.Items[itemInfo.ID] = itemInfo;
}
if (OnItemReceived != null)
OnItemReceived(itemInfo.ID);
}
/// <summary>
/// Create a folder in this agent's inventory.
/// </summary>
///
/// If the inventory service has not yet delievered the inventory
/// for this user then the request will be queued.
///
/// <param name="parentID"></param>
/// <returns></returns>
public bool CreateFolder(string folderName, UUID folderID, ushort folderType, UUID parentID)
{
// m_log.DebugFormat(
// "[AGENT INVENTORY]: Creating inventory folder {0} {1} for {2} {3}", folderID, folderName, remoteClient.Name, remoteClient.AgentId);
if (m_hasReceivedInventory)
{
InventoryFolderImpl parentFolder = RootFolder.FindFolder(parentID);
if (null == parentFolder)
{
m_log.WarnFormat(
"[AGENT INVENTORY]: Tried to create folder {0} {1} but the parent {2} does not exist",
folderName, folderID, parentID);
return false;
}
InventoryFolderImpl createdFolder = parentFolder.CreateChildFolder(folderID, folderName, folderType);
if (createdFolder != null)
{
InventoryFolderBase createdBaseFolder = new InventoryFolderBase();
createdBaseFolder.Owner = createdFolder.Owner;
createdBaseFolder.ID = createdFolder.ID;
createdBaseFolder.Name = createdFolder.Name;
createdBaseFolder.ParentID = createdFolder.ParentID;
createdBaseFolder.Type = createdFolder.Type;
createdBaseFolder.Version = createdFolder.Version;
m_InventoryService.AddFolder(createdBaseFolder);
return true;
}
else
{
m_log.WarnFormat(
"[AGENT INVENTORY]: Tried to create folder {0} {1} but the folder already exists",
folderName, folderID);
return false;
}
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(CreateFolderDelegate), this, "CreateFolder"),
new object[] { folderName, folderID, folderType, parentID }));
return true;
}
}
/// <summary>
/// Handle a client request to update the inventory folder
/// </summary>
///
/// If the inventory service has not yet delievered the inventory
/// for this user then the request will be queued.
///
/// FIXME: We call add new inventory folder because in the data layer, we happen to use an SQL REPLACE
/// so this will work to rename an existing folder. Needless to say, to rely on this is very confusing,
/// and needs to be changed.
///
/// <param name="folderID"></param>
/// <param name="type"></param>
/// <param name="name"></param>
/// <param name="parentID"></param>
public bool UpdateFolder(string name, UUID folderID, ushort type, UUID parentID)
{
// m_log.DebugFormat(
// "[AGENT INVENTORY]: Updating inventory folder {0} {1} for {2} {3}", folderID, name, remoteClient.Name, remoteClient.AgentId);
if (m_hasReceivedInventory)
{
InventoryFolderImpl folder = RootFolder.FindFolder(folderID);
// Delegate movement if updated parent id isn't the same as the existing parentId
if (folder.ParentID != parentID)
MoveFolder(folderID, parentID);
InventoryFolderBase baseFolder = new InventoryFolderBase();
baseFolder.Owner = m_userProfile.ID;
baseFolder.ID = folderID;
baseFolder.Name = name;
baseFolder.ParentID = parentID;
baseFolder.Type = (short)type;
baseFolder.Version = RootFolder.Version;
m_InventoryService.UpdateFolder(baseFolder);
folder.Name = name;
folder.Type = (short)type;
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(UpdateFolderDelegate), this, "UpdateFolder"),
new object[] { name, folderID, type, parentID }));
}
return true;
}
/// <summary>
/// Handle an inventory folder move request from the client.
///
/// If the inventory service has not yet delievered the inventory
/// for this user then the request will be queued.
/// </summary>
///
/// <param name="folderID"></param>
/// <param name="parentID"></param>
/// <returns>
/// true if the delete was successful, or if it was queued pending folder receipt
/// false if the folder to be deleted did not exist.
/// </returns>
public bool MoveFolder(UUID folderID, UUID parentID)
{
// m_log.DebugFormat(
// "[AGENT INVENTORY]: Moving inventory folder {0} into folder {1} for {2} {3}",
// parentID, remoteClient.Name, remoteClient.Name, remoteClient.AgentId);
if (m_hasReceivedInventory)
{
InventoryFolderBase baseFolder = new InventoryFolderBase();
baseFolder.Owner = m_userProfile.ID;
baseFolder.ID = folderID;
baseFolder.ParentID = parentID;
m_InventoryService.MoveFolder(baseFolder);
InventoryFolderImpl folder = RootFolder.FindFolder(folderID);
InventoryFolderImpl parentFolder = RootFolder.FindFolder(parentID);
if (parentFolder != null && folder != null)
{
InventoryFolderImpl oldParentFolder = RootFolder.FindFolder(folder.ParentID);
if (oldParentFolder != null)
{
oldParentFolder.RemoveChildFolder(folderID);
parentFolder.AddChildFolder(folder);
}
else
{
return false;
}
}
else
{
return false;
}
return true;
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(MoveFolderDelegate), this, "MoveFolder"),
new object[] { folderID, parentID }));
return true;
}
}
/// <summary>
/// This method will delete all the items and folders in the given folder.
/// </summary>
/// If the inventory service has not yet delievered the inventory
/// for this user then the request will be queued.
///
/// <param name="folderID"></param>
public bool PurgeFolder(UUID folderID)
{
// m_log.InfoFormat("[AGENT INVENTORY]: Purging folder {0} for {1} uuid {2}",
// folderID, remoteClient.Name, remoteClient.AgentId);
if (m_hasReceivedInventory)
{
InventoryFolderImpl purgedFolder = RootFolder.FindFolder(folderID);
if (purgedFolder != null)
{
// XXX Nasty - have to create a new object to hold details we already have
InventoryFolderBase purgedBaseFolder = new InventoryFolderBase();
purgedBaseFolder.Owner = purgedFolder.Owner;
purgedBaseFolder.ID = purgedFolder.ID;
purgedBaseFolder.Name = purgedFolder.Name;
purgedBaseFolder.ParentID = purgedFolder.ParentID;
purgedBaseFolder.Type = purgedFolder.Type;
purgedBaseFolder.Version = purgedFolder.Version;
m_InventoryService.PurgeFolder(purgedBaseFolder);
purgedFolder.Purge();
return true;
}
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(PurgeFolderDelegate), this, "PurgeFolder"),
new object[] { folderID }));
return true;
}
return false;
}
/// <summary>
/// Add an item to the user's inventory.
/// </summary>
/// If the item has no folder set (i.e. it is UUID.Zero), then it is placed in the most appropriate folder
/// for that type.
/// <param name="itemInfo"></param>
public void AddItem(InventoryItemBase item)
{
if (m_hasReceivedInventory)
{
if (item.Folder == UUID.Zero)
{
InventoryFolderImpl f = FindFolderForType(item.AssetType);
if (f != null)
item.Folder = f.ID;
else
item.Folder = RootFolder.ID;
}
ItemReceive(item, null);
m_InventoryService.AddItem(item);
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(AddItemDelegate), this, "AddItem"),
new object[] { item }));
}
}
/// <summary>
/// Update an item in the user's inventory
/// </summary>
/// <param name="userID"></param>
/// <param name="itemInfo"></param>
public void UpdateItem(InventoryItemBase item)
{
if (m_hasReceivedInventory)
{
m_InventoryService.UpdateItem(item);
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(UpdateItemDelegate), this, "UpdateItem"),
new object[] { item }));
}
}
/// <summary>
/// Delete an item from the user's inventory
///
/// If the inventory service has not yet delievered the inventory
/// for this user then the request will be queued.
/// </summary>
/// <param name="itemID"></param>
/// <returns>
/// true on a successful delete or a if the request is queued.
/// Returns false on an immediate failure
/// </returns>
public bool DeleteItem(UUID itemID)
{
if (m_hasReceivedInventory)
{
// XXX For historical reasons (grid comms), we need to retrieve the whole item in order to delete, even though
// really only the item id is required.
InventoryItemBase item = RootFolder.FindItem(itemID);
if (null == item)
{
m_log.WarnFormat("[AGENT INVENTORY]: Tried to delete item {0} which does not exist", itemID);
return false;
}
if (RootFolder.DeleteItem(item.ID))
{
List<UUID> uuids = new List<UUID>();
uuids.Add(itemID);
return m_InventoryService.DeleteItems(this.UserProfile.ID, uuids);
}
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(DeleteItemDelegate), this, "DeleteItem"),
new object[] { itemID }));
return true;
}
return false;
}
/// <summary>
/// Send details of the inventory items and/or folders in a given folder to the client.
/// </summary>
/// <param name="client"></param>
/// <param name="folderID"></param>
/// <param name="fetchFolders"></param>
/// <param name="fetchItems"></param>
/// <returns>true if the request was queued or successfully processed, false otherwise</returns>
public bool SendInventoryDecendents(IClientAPI client, UUID folderID, int version, bool fetchFolders, bool fetchItems)
{
if (m_hasReceivedInventory)
{
InventoryFolderImpl folder;
if ((folder = RootFolder.FindFolder(folderID)) != null)
{
// m_log.DebugFormat(
// "[AGENT INVENTORY]: Found folder {0} for client {1}",
// folderID, remoteClient.AgentId);
client.SendInventoryFolderDetails(
client.AgentId, folderID, folder.RequestListOfItems(),
folder.RequestListOfFolders(), version, fetchFolders, fetchItems);
return true;
}
else
{
m_log.WarnFormat(
"[AGENT INVENTORY]: Could not find folder {0} requested by user {1} {2}",
folderID, client.Name, client.AgentId);
return false;
}
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(SendInventoryDescendentsDelegate), this, "SendInventoryDecendents", false, false),
new object[] { client, folderID, fetchFolders, fetchItems }));
return true;
}
}
/// <summary>
/// Find an appropriate folder for the given asset type
/// </summary>
/// <param name="type"></param>
/// <returns>null if no appropriate folder exists</returns>
public InventoryFolderImpl FindFolderForType(int type)
{
if (RootFolder == null)
return null;
return RootFolder.FindFolderForType(type);
}
// Load additional items that other regions have put into the database
// The item will be added tot he local cache. Returns true if the item
// was found and can be sent to the client
//
public bool QueryItem(InventoryItemBase item)
{
if (m_hasReceivedInventory)
{
InventoryItemBase invItem = RootFolder.FindItem(item.ID);
if (invItem != null)
{
// Item is in local cache, just update client
//
return true;
}
InventoryItemBase itemInfo = null;
itemInfo = m_InventoryService.GetItem(item);
if (itemInfo != null)
{
InventoryFolderImpl folder = RootFolder.FindFolder(itemInfo.Folder);
ItemReceive(itemInfo, folder);
return true;
}
return false;
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(QueryItemDelegate), this, "QueryItem"),
new object[] { item.ID }));
return true;
}
}
public bool QueryFolder(InventoryFolderBase folder)
{
if (m_hasReceivedInventory)
{
InventoryFolderBase invFolder = RootFolder.FindFolder(folder.ID);
if (invFolder != null)
{
// Folder is in local cache, just update client
//
return true;
}
InventoryFolderBase folderInfo = null;
folderInfo = m_InventoryService.GetFolder(folder);
if (folderInfo != null)
{
InventoryFolderImpl createdFolder = RootFolder.CreateChildFolder(folderInfo.ID, folderInfo.Name, (ushort)folderInfo.Type);
createdFolder.Version = folderInfo.Version;
createdFolder.Owner = folderInfo.Owner;
createdFolder.ParentID = folderInfo.ParentID;
return true;
}
return false;
}
else
{
AddRequest(
new InventoryRequest(
Delegate.CreateDelegate(typeof(QueryFolderDelegate), this, "QueryFolder"),
new object[] { folder.ID }));
return true;
}
}
}
/// <summary>
/// Should be implemented by callers which require a callback when the user's inventory is received
/// </summary>
public interface IInventoryRequest
{
/// <summary>
/// This is the method executed once we have received the user's inventory by which the request can be fulfilled.
/// </summary>
void Execute();
}
/// <summary>
/// Generic inventory request
/// </summary>
class InventoryRequest : IInventoryRequest
{
private Delegate m_delegate;
private Object[] m_args;
internal InventoryRequest(Delegate delegat, Object[] args)
{
m_delegate = delegat;
m_args = args;
}
public void Execute()
{
if (m_delegate != null)
m_delegate.DynamicInvoke(m_args);
}
}
}