RemoteAssetServiceConnector.cs

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/*
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 * 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:
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 *       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.
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 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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using log4net;
using Mono.Addins;
using System;
using System.Collections.Generic;
using System.Reflection;
using Nini.Config;
using OpenSim.Framework;
using OpenSim.Services.Connectors;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Services.Interfaces;

namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
{
    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "RemoteAssetServicesConnector")]
    public class RemoteAssetServicesConnector :
            AssetServicesConnector, ISharedRegionModule, IAssetService
    {
        private static readonly ILog m_log =
                LogManager.GetLogger(
                MethodBase.GetCurrentMethod().DeclaringType);

        private bool m_Enabled = false;
        private IImprovedAssetCache m_Cache;

        public Type ReplaceableInterface 
        {
            get { return null; }
        }

        public string Name
        {
            get { return "RemoteAssetServicesConnector"; }
        }

        public override void Initialise(IConfigSource source)
        {
            IConfig moduleConfig = source.Configs["Modules"];
            if (moduleConfig != null)
            {
                string name = moduleConfig.GetString("AssetServices", "");
                if (name == Name)
                {
                    IConfig assetConfig = source.Configs["AssetService"];
                    if (assetConfig == null)
                    {
                        m_log.Error("[ASSET CONNECTOR]: AssetService missing from OpenSim.ini");
                        return;
                    }

                    m_Enabled = true;

                    base.Initialise(source);

                    m_log.Info("[ASSET CONNECTOR]: Remote assets enabled");
                }
            }
        }

        public void PostInitialise()
        {
        }

        public void Close()
        {
        }

        public void AddRegion(Scene scene)
        {
            if (!m_Enabled)
                return;

            scene.RegisterModuleInterface<IAssetService>(this);
        }

        public void RemoveRegion(Scene scene)
        {
        }

        public void RegionLoaded(Scene scene)
        {
            if (!m_Enabled)
                return;

            if (m_Cache == null)
            {
                m_Cache = scene.RequestModuleInterface<IImprovedAssetCache>();

                // Since we are a shared module and scene data is not
                // available for every method, the cache must be shared, too
                //
                if (!(m_Cache is ISharedRegionModule))
                    m_Cache = null;
                else
                    SetCache(m_Cache);

            }

            m_log.InfoFormat("[ASSET CONNECTOR]: Enabled remote assets for region {0}", scene.RegionInfo.RegionName);

            if (m_Cache != null)
            {
                m_log.InfoFormat("[ASSET CONNECTOR]: Enabled asset caching for region {0}", scene.RegionInfo.RegionName);
            }
        }
    }
}