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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.Reflection;
using System.Collections.Generic;
using OpenSim.Framework;
using OpenSim.Services.Interfaces;
using OpenMetaverse;
using log4net;
namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.UserAccounts
{
public class UserAccountCache : IUserAccountCacheModule
{
private const double CACHE_ALIEN_EXPIRATION_SECONDS = 172800; // 48 hours
private const double CACHE_EXPIRATION_SECONDS = 3600.0; // 1 hour!
private const double CACHE_NULL_EXPIRATION_SECONDS = 600; // 10minutes
// private static readonly ILog m_log =
// LogManager.GetLogger(
// MethodBase.GetCurrentMethod().DeclaringType);
private ExpiringCache<UUID, UserAccount> m_UUIDCache;
private ExpiringCache<string, UUID> m_NameCache;
private object accessLock = new object();
public UserAccountCache()
{
m_UUIDCache = new ExpiringCache<UUID, UserAccount>();
m_NameCache = new ExpiringCache<string, UUID>();
}
public void Cache(UUID userID, UserAccount account)
{
// Cache even null accounts
lock(accessLock)
{
if (account == null)
m_UUIDCache.AddOrUpdate(userID, null, CACHE_NULL_EXPIRATION_SECONDS);
else if(account.LocalToGrid)
{
m_UUIDCache.AddOrUpdate(userID, account, CACHE_EXPIRATION_SECONDS);
m_NameCache.AddOrUpdate(account.Name, account.PrincipalID, CACHE_EXPIRATION_SECONDS);
}
else
{
m_UUIDCache.AddOrUpdate(userID, account, CACHE_ALIEN_EXPIRATION_SECONDS);
m_NameCache.AddOrUpdate(account.Name, account.PrincipalID, CACHE_ALIEN_EXPIRATION_SECONDS);
}
//m_log.DebugFormat("[USER CACHE]: cached user {0}", userID);
}
}
public UserAccount Get(UUID userID, out bool inCache)
{
UserAccount account = null;
inCache = false;
lock(accessLock)
{
if (m_UUIDCache.TryGetValue(userID, out account))
{
//m_log.DebugFormat("[USER CACHE]: Account {0} {1} found in cache", account.FirstName, account.LastName);
inCache = true;
return account;
}
}
return null;
}
public UserAccount Get(string name, out bool inCache)
{
inCache = false;
lock(accessLock)
{
if (!m_NameCache.Contains(name))
return null;
UserAccount account = null;
UUID uuid = UUID.Zero;
if (m_NameCache.TryGetValue(name, out uuid))
{
if (m_UUIDCache.TryGetValue(uuid, out account))
{
inCache = true;
return account;
}
}
}
return null;
}
public void Invalidate(UUID userID)
{
m_UUIDCache.Remove(userID);
}
public void Remove(UUID id)
{
lock(accessLock)
{
if (!m_UUIDCache.Contains(id))
return;
UserAccount account = null;
if (m_UUIDCache.TryGetValue(id, out account) && account != null)
m_NameCache.Remove(account.Name);
m_UUIDCache.Remove(id);
}
}
public void Remove(string name)
{
lock(accessLock)
{
if (!m_NameCache.Contains(name))
return;
UUID uuid = UUID.Zero;
if (m_NameCache.TryGetValue(name, out uuid))
{
m_NameCache.Remove(name);
m_UUIDCache.Remove(uuid);
}
}
}
}
}
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