add initial UserGrid service classes as per diva's direction

this will initially store home location data instead of the presence service
compiles but not enough to actually test yet

8 files changed, 525 insertions, 2 deletions

diff --git a/OpenSim/Data/IUserGridData.cs b/OpenSim/Data/IUserGridData.cs
new file mode 100644
index 0000000..6f7467e
--- /dev/null
+++ b/OpenSim/Data/IUserGridData.cs
@@ -0,0 +1,50 @@
+/*
+ * 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 OpenMetaverse;
+using OpenSim.Framework;
+
+namespace OpenSim.Data
+{
+    // This MUST be a ref type!
+    public class UserGridData
+    {
+        public string UserID;
+        public Dictionary<string, string> Data;
+    }
+
+    /// <summary>
+    /// An interface for connecting to the user grid datastore
+    /// </summary>
+    public interface IUserGridData 
+    {
+        UserGridData GetUserGridData(string userID);        
+        bool StoreUserGridData(UserGridData data);
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs b/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs
index b170dde..756b42d 100644
--- a/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs
+++ b/OpenSim/Data/MySQL/MySQLGenericTableHandler.cs
@@ -197,8 +197,7 @@ namespace OpenSim.Data.MySQL
         public virtual T[] Get(string where)
         {
             using (MySqlCommand cmd = new MySqlCommand())
-            {
-            
+            {            
                 string query = String.Format("select * from {0} where {1}",
                                              m_Realm, where);
                 
diff --git a/OpenSim/Data/MySQL/MySQLUserGridData.cs b/OpenSim/Data/MySQL/MySQLUserGridData.cs
new file mode 100644
index 0000000..7209b18
--- /dev/null
+++ b/OpenSim/Data/MySQL/MySQLUserGridData.cs
@@ -0,0 +1,64 @@
+/*
+ * 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.Data;
+using System.Reflection;
+using System.Threading;
+using log4net;
+using OpenMetaverse;
+using OpenSim.Framework;
+using MySql.Data.MySqlClient;
+
+namespace OpenSim.Data.MySQL
+{
+    /// <summary>
+    /// A MySQL Interface for user grid data
+    /// </summary>
+    public class MySQLUserGridData : MySQLGenericTableHandler<UserGridData>, IUserGridData
+    {
+//        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        public MySQLUserGridData(string connectionString, string realm) : base(connectionString, realm, "UserGrid") {}
+
+        public UserGridData GetUserGridData(string userID)
+        {
+            UserGridData[] ret = Get("UserID", userID);
+
+            if (ret.Length == 0)
+                return null;
+
+            return ret[0];
+        }        
+
+        public bool StoreUserGridData(UserGridData data)
+        {
+            return Store(data);
+        }
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/UserGrid/LocalUserGridServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/UserGrid/LocalUserGridServiceConnector.cs
new file mode 100644
index 0000000..f4309fe
--- /dev/null
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/UserGrid/LocalUserGridServiceConnector.cs
@@ -0,0 +1,139 @@
+/*
+ * 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 Nini.Config;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Server.Base;
+using OpenSim.Services.Interfaces;
+
+using OpenMetaverse;
+
+namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.UserGrid
+{
+    public class LocalUserGridServicesConnector : ISharedRegionModule, IUserGridService
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private IUserGridService m_service;
+
+        private bool m_Enabled = false;
+
+        public Type ReplaceableInterface 
+        {
+            get { return null; }
+        }
+
+        public string Name
+        {
+            get { return "LocalUserGridServicesConnector"; }
+        }
+
+        public void Initialise(IConfigSource source)
+        {
+            IConfig moduleConfig = source.Configs["Modules"];
+            if (moduleConfig != null)
+            {
+                string name = moduleConfig.GetString("UserGridServices", "");
+                if (name == Name)
+                {
+                    IConfig userConfig = source.Configs["UserGridService"];
+                    if (userConfig == null)
+                    {
+                        m_log.Error("[LOCAL USER GRID SERVICE CONNECTOR]: UserGridService missing from ini files");
+                        return;
+                    }
+
+                    string serviceDll = userConfig.GetString("LocalServiceModule", String.Empty);
+
+                    if (serviceDll == String.Empty)
+                    {
+                        m_log.Error("[LOCAL USER GRID SERVICE CONNECTOR]: No LocalServiceModule named in section UserGridService");
+                        return;
+                    }
+
+                    Object[] args = new Object[] { source };
+                    m_service = ServerUtils.LoadPlugin<IUserGridService>(serviceDll, args);
+
+                    if (m_service == null)
+                    {
+                        m_log.Error("[LOCAL USER GRID SERVICE CONNECTOR]: Can't load UserGrid service");
+                        return;
+                    }
+                    m_Enabled = true;
+                    m_log.Info("[LOCAL USER GRID SERVICE CONNECTOR]: Local UserGrid connector enabled");
+                }
+            }
+        }
+
+        public void PostInitialise()
+        {
+            if (!m_Enabled)
+                return;
+        }
+
+        public void Close()
+        {
+            if (!m_Enabled)
+                return;
+        }
+
+        public void AddRegion(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+
+            scene.RegisterModuleInterface<IUserGridService>(m_service);
+        }
+
+        public void RemoveRegion(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+        }
+
+        public void RegionLoaded(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+        }
+
+        public UserGridInfo GetUserGridInfo(string userID)
+        {
+            return m_service.GetUserGridInfo(userID);
+        }
+        
+        public bool StoreUserGridInfo(UserGridInfo info)
+        {
+            return m_service.StoreUserGridInfo(info);
+        }
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Services/Connectors/UserGrid/UserGridServiceConnector.cs b/OpenSim/Services/Connectors/UserGrid/UserGridServiceConnector.cs
new file mode 100644
index 0000000..3aa8940
--- /dev/null
+++ b/OpenSim/Services/Connectors/UserGrid/UserGridServiceConnector.cs
@@ -0,0 +1,38 @@
+/*
+ * 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;
+
+namespace OpenSim.Services.Connectors
+{     
+    public class UserGridServiceConnector
+    {       
+        public UserGridServiceConnector()
+        {
+        }
+    }
+}
diff --git a/OpenSim/Services/Interfaces/IUserGridService.cs b/OpenSim/Services/Interfaces/IUserGridService.cs
new file mode 100644
index 0000000..50134e0
--- /dev/null
+++ b/OpenSim/Services/Interfaces/IUserGridService.cs
@@ -0,0 +1,75 @@
+/*
+ * 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 OpenMetaverse;
+
+namespace OpenSim.Services.Interfaces
+{
+    /// <summary>
+    /// Records user information specific to a grid but which is not part of a user's account.
+    /// </summary>
+    public class UserGridInfo
+    {
+        public string UserID;
+        public UUID HomeRegionID;
+        public Vector3 HomePosition;
+        public Vector3 HomeLookAt;
+
+        public UserGridInfo() {}
+        
+        public UserGridInfo(Dictionary<string, object> kvp)
+        {
+            if (kvp.ContainsKey("UserID"))
+                UserID = kvp["UserID"].ToString();
+            if (kvp.ContainsKey("HomeRegionID"))
+                UUID.TryParse(kvp["HomeRegionID"].ToString(), out HomeRegionID);
+            if (kvp.ContainsKey("HomePosition"))
+                Vector3.TryParse(kvp["HomePosition"].ToString(), out HomePosition);
+            if (kvp.ContainsKey("HomeLookAt"))
+                Vector3.TryParse(kvp["HomeLookAt"].ToString(), out HomeLookAt);
+        }
+
+        public Dictionary<string, object> ToKeyValuePairs()
+        {
+            Dictionary<string, object> result = new Dictionary<string, object>();
+            result["UserID"] = UserID;
+            result["HomeRegionID"] = HomeRegionID.ToString();
+            result["HomePosition"] = HomePosition.ToString();
+            result["HomeLookAt"] = HomeLookAt.ToString();
+
+            return result;
+        }
+    }
+    
+    public interface IUserGridService
+    {
+        UserGridInfo GetUserGridInfo(string userID);
+        bool StoreUserGridInfo(UserGridInfo info);
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Services/UserAccountService/UserGridService.cs b/OpenSim/Services/UserAccountService/UserGridService.cs
new file mode 100644
index 0000000..2d28b33
--- /dev/null
+++ b/OpenSim/Services/UserAccountService/UserGridService.cs
@@ -0,0 +1,76 @@
+/*
+ * 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 Nini.Config;
+using OpenSim.Data;
+using OpenSim.Services.Interfaces;
+using OpenSim.Framework.Console;
+using GridRegion = OpenSim.Services.Interfaces.GridRegion;
+
+using OpenMetaverse;
+using log4net;
+
+namespace OpenSim.Services.UserAccountService
+{
+    public class UserGridService : UserGridServiceBase, IUserGridService
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        public UserGridService(IConfigSource config) : base(config) 
+        {
+            m_log.Debug("[USER GRID SERVICE]: Starting user grid service");
+        }
+
+        public UserGridInfo GetUserGridInfo(string userID)
+        {
+            UserGridData d = m_Database.GetUserGridData(userID);
+            
+            UserGridInfo info = new UserGridInfo();
+            info.UserID = d.UserID;
+            info.HomeRegionID = new UUID(d.Data["HomeRegionID"]);
+            info.HomePosition = Vector3.Parse(d.Data["HomePosition"]);
+            info.HomeLookAt = Vector3.Parse(d.Data["HomeLookAt"]);
+
+            return info;            
+        }
+        
+        public bool StoreUserGridInfo(UserGridInfo info)
+        {
+            UserGridData d = new UserGridData();
+
+            d.Data["UserID"] = info.UserID;
+            d.Data["HomeRegionID"] = info.HomeRegionID.ToString();
+            d.Data["HomePosition"] = info.HomePosition.ToString();
+            d.Data["HomeLookAt"] = info.HomeLookAt.ToString();
+
+            return m_Database.StoreUserGridData(d);
+        }
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Services/UserAccountService/UserGridServiceBase.cs b/OpenSim/Services/UserAccountService/UserGridServiceBase.cs
new file mode 100644
index 0000000..80aaa49
--- /dev/null
+++ b/OpenSim/Services/UserAccountService/UserGridServiceBase.cs
@@ -0,0 +1,82 @@
+/*
+ * 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 Nini.Config;
+using OpenSim.Framework;
+using OpenSim.Data;
+using OpenSim.Services.Interfaces;
+using OpenSim.Services.Base;
+
+namespace OpenSim.Services.UserAccountService
+{
+    public class UserGridServiceBase : ServiceBase
+    {
+        protected IUserGridData m_Database = null;
+
+        public UserGridServiceBase(IConfigSource config) : base(config)
+        {
+            string dllName = String.Empty;
+            string connString = String.Empty;
+            string realm = "UserGrid";
+
+            //
+            // 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);
+            }
+
+            //
+            // [PresenceService] section overrides [DatabaseService], if it exists
+            //
+            IConfig presenceConfig = config.Configs["PresenceService"];
+            if (presenceConfig != null)
+            {
+                dllName = presenceConfig.GetString("StorageProvider", dllName);
+                connString = presenceConfig.GetString("ConnectionString", connString);
+                realm = presenceConfig.GetString("Realm", realm);
+            }
+            
+            //
+            // We tried, but this doesn't exist. We can't proceed.
+            //
+            if (dllName.Equals(String.Empty))
+                throw new Exception("No StorageProvider configured");
+
+            m_Database = LoadPlugin<IUserGridData>(dllName, new Object[] { connString, realm });
+            if (m_Database == null)
+                throw new Exception("Could not find a storage interface in the given module " + dllName);
+        }
+    }
+}
\ No newline at end of file