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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;
using GridRegion = OpenSim.Services.Interfaces.GridRegion;
namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Grid
{
public class RegionInfoCache
{
private const double CACHE_EXPIRATION_SECONDS = 300.0; // 5 minutes
// private static readonly ILog m_log =
// LogManager.GetLogger(
// MethodBase.GetCurrentMethod().DeclaringType);
internal struct ScopedRegionUUID
{
public UUID m_scopeID;
public UUID m_regionID;
public ScopedRegionUUID(UUID scopeID, UUID regionID)
{
m_scopeID = scopeID;
m_regionID = regionID;
}
}
internal struct ScopedRegionName
{
public UUID m_scopeID;
public string m_name;
public ScopedRegionName(UUID scopeID, string name)
{
m_scopeID = scopeID;
m_name = name;
}
}
internal struct ScopedRegionPosition
{
public UUID m_scopeID;
public ulong m_regionHandle;
public ScopedRegionPosition(UUID scopeID, ulong handle)
{
m_scopeID = scopeID;
m_regionHandle = handle;
}
}
private ExpiringCache<ScopedRegionUUID, GridRegion> m_UUIDCache;
private ExpiringCache<ScopedRegionName, ScopedRegionUUID> m_NameCache;
private ExpiringCache<ScopedRegionPosition, GridRegion> m_PositionCache;
public RegionInfoCache()
{
m_UUIDCache = new ExpiringCache<ScopedRegionUUID, GridRegion>();
m_NameCache = new ExpiringCache<ScopedRegionName, ScopedRegionUUID>();
m_PositionCache = new ExpiringCache<ScopedRegionPosition, GridRegion>();
}
public void Cache(GridRegion rinfo)
{
if (rinfo != null)
this.Cache(rinfo.ScopeID,rinfo.RegionID,rinfo);
}
public void Cache(UUID scopeID, UUID regionID, GridRegion rinfo)
{
// for now, do not cache negative results; this is because
// we need to figure out how to handle regions coming online
// in a timely way
if (rinfo == null)
return;
ScopedRegionUUID id = new ScopedRegionUUID(scopeID,regionID);
// Cache even null accounts
m_UUIDCache.AddOrUpdate(id, rinfo, CACHE_EXPIRATION_SECONDS);
if (rinfo != null)
{
ScopedRegionName name = new ScopedRegionName(scopeID,rinfo.RegionName);
m_NameCache.AddOrUpdate(name, id, CACHE_EXPIRATION_SECONDS);
ScopedRegionPosition pos = new ScopedRegionPosition(scopeID, rinfo.RegionHandle);
m_PositionCache.AddOrUpdate(pos, rinfo, CACHE_EXPIRATION_SECONDS);
}
}
public GridRegion Get(UUID scopeID, UUID regionID, out bool inCache)
{
inCache = false;
GridRegion rinfo = null;
ScopedRegionUUID id = new ScopedRegionUUID(scopeID,regionID);
if (m_UUIDCache.TryGetValue(id, out rinfo))
{
inCache = true;
return rinfo;
}
return null;
}
public GridRegion Get(UUID scopeID, ulong handle, out bool inCache)
{
inCache = false;
GridRegion rinfo = null;
ScopedRegionPosition pos = new ScopedRegionPosition(scopeID, handle);
if (m_PositionCache.TryGetValue(pos, out rinfo))
{
inCache = true;
return rinfo;
}
return null;
}
public GridRegion Get(UUID scopeID, string name, out bool inCache)
{
inCache = false;
ScopedRegionName sname = new ScopedRegionName(scopeID,name);
ScopedRegionUUID id;
if (m_NameCache.TryGetValue(sname, out id))
{
GridRegion rinfo = null;
if (m_UUIDCache.TryGetValue(id, out rinfo))
{
inCache = true;
return rinfo;
}
}
return null;
}
}
}
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