FriendsServiceBase.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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 *       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
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using System;
using System.Reflection;
using log4net;
using Nini.Config;
using OpenSim.Framework;
using OpenSim.Data;
using OpenSim.Services.Interfaces;
using OpenSim.Services.Base;

namespace OpenSim.Services.Friends
{
    public class FriendsServiceBase : ServiceBase
    {
        protected IFriendsData m_Database = null;

        public FriendsServiceBase(IConfigSource config) : base(config)
        {
            string dllName = String.Empty;
            string connString = String.Empty;

            //
            // Try reading the [FriendsService] section first, if it exists
            //
            IConfig friendsConfig = config.Configs["FriendsService"];
            if (friendsConfig != null)
            {
                dllName = friendsConfig.GetString("StorageProvider", dllName);
                connString = friendsConfig.GetString("ConnectionString", connString);
            }

            //
            // Try reading the [DatabaseService] section, if it exists
            //
            IConfig dbConfig = config.Configs["DatabaseService"];
            if (dbConfig != null)
            {
                if (dllName == String.Empty)
                    dllName = dbConfig.GetString("StorageProvider", String.Empty);
                if (connString == String.Empty)
                    connString = dbConfig.GetString("ConnectionString", String.Empty);
            }

            //
            // We tried, but this doesn't exist. We can't proceed.
            //
            if (String.Empty.Equals(dllName))
                throw new Exception("No StorageProvider configured");

            string realm = "Friends";
            if (friendsConfig != null)
                realm = friendsConfig.GetString("Realm", realm);

            m_Database = LoadPlugin<IFriendsData>(dllName, new Object[] { connString, realm });
            if (m_Database == null)
            {
                throw new Exception(
                    string.Format(
                        "Could not find a storage interface {0} in the given StorageProvider {1}", "IFriendsData", dllName));
            }
        }
    }
}