From 12a32b06083547a0b789bc58d3b32603700ce1f2 Mon Sep 17 00:00:00 2001
From: Johan Berntsson
Date: Mon, 24 Mar 2008 01:21:01 +0000
Subject: Added a plugin loader in GridServer

---
 OpenSim/Grid/GridServer/GridServerBase.cs | 34 ++++++++++++++++++++++++-
 OpenSim/Grid/GridServer/IGridPlugin.cs    | 41 +++++++++++++++++++++++++++++++
 prebuild.xml                              |  1 +
 3 files changed, 75 insertions(+), 1 deletion(-)
 create mode 100644 OpenSim/Grid/GridServer/IGridPlugin.cs

diff --git a/OpenSim/Grid/GridServer/GridServerBase.cs b/OpenSim/Grid/GridServer/GridServerBase.cs
index faf1d8b..c29924b 100644
--- a/OpenSim/Grid/GridServer/GridServerBase.cs
+++ b/OpenSim/Grid/GridServer/GridServerBase.cs
@@ -28,9 +28,14 @@
 using System;
 using System.IO;
 using System.Timers;
+using System.Collections;
+using System.Collections.Generic;
 using OpenSim.Framework;
 using OpenSim.Framework.Console;
 using OpenSim.Framework.Servers;
+using Nwc.XmlRpc;
+using Mono.Addins;
+using Mono.Addins.Description;
 
 namespace OpenSim.Grid.GridServer
 {
@@ -40,6 +45,13 @@ namespace OpenSim.Grid.GridServer
     {
         protected GridConfig m_config;
         protected GridManager m_gridManager;
+		protected BaseHttpServer httpServer;
+        protected List<IGridPlugin> m_plugins = new List<IGridPlugin>();
+
+        public BaseHttpServer
+		{
+			get { return httpServer; }
+		}
 
         public void Work()
         {
@@ -76,7 +88,7 @@ namespace OpenSim.Grid.GridServer
             SetupGridManager();
 
             m_console.Status("[GRID]: Starting HTTP process");
-            BaseHttpServer httpServer = new BaseHttpServer(m_config.HttpPort);
+            httpServer = new BaseHttpServer(m_config.HttpPort);
             //GridManagementAgent GridManagerAgent = new GridManagementAgent(httpServer, "gridserver", m_config.SimSendKey, m_config.SimRecvKey, managercallback);
 
             httpServer.AddXmlRPCHandler("simulator_login", m_gridManager.XmlRpcSimulatorLoginMethod);
@@ -99,6 +111,8 @@ namespace OpenSim.Grid.GridServer
             //httpServer.AddRestHandler("GET", "/regions/", m_gridManager.RestGetRegionMethod);
             //httpServer.AddRestHandler("POST", "/regions/", m_gridManager.RestSetRegionMethod);
 
+            LoadGridPlugins();
+
             httpServer.Start();
 
             m_console.Status("[GRID]: Starting sim status checker");
@@ -108,6 +122,23 @@ namespace OpenSim.Grid.GridServer
             simCheckTimer.Enabled = true;
         }
 
+        protected void LoadGridPlugins()
+        {
+            //m_console.Status("[GRIDPLUGINS]: Looking for plugins");
+            AddinManager.Initialize(".");
+            AddinManager.Registry.Update(null);
+
+            ExtensionNodeList nodes = AddinManager.GetExtensionNodes("/OpenSim/GridServer");
+            foreach (TypeExtensionNode node in nodes)
+            {
+                m_console.Status("[GRIDPLUGINS]: Loading OpenSim plugin "+node.Path);
+                IGridPlugin plugin = (IGridPlugin) node.CreateInstance();
+                plugin.Initialise(this);
+                m_plugins.Add(plugin);
+            }
+        }
+		
+
         protected virtual void SetupGridManager()
         {
             m_console.Status("[GRID]: Connecting to Storage Server");
@@ -169,6 +200,7 @@ namespace OpenSim.Grid.GridServer
                     break;                                        
 
                 case "shutdown":
+                    foreach(IGridPlugin plugin in m_plugins) plugin.Close();
                     m_console.Close();
                     Environment.Exit(0);
                     break;
diff --git a/OpenSim/Grid/GridServer/IGridPlugin.cs b/OpenSim/Grid/GridServer/IGridPlugin.cs
new file mode 100644
index 0000000..fbadfce
--- /dev/null
+++ b/OpenSim/Grid/GridServer/IGridPlugin.cs
@@ -0,0 +1,41 @@
+/*
+* 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 OpenSim 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 Mono.Addins;
+
+[assembly : AddinRoot("OpenSim", "0.5")]
+
+namespace OpenSim.Grid.GridServer
+{
+    [TypeExtensionPoint("/OpenSim/GridServer")]
+    public interface IGridPlugin
+    {
+        void Initialise(GridServerBase gridServer);
+        void Close();
+    }
+}
diff --git a/prebuild.xml b/prebuild.xml
index 1d4d4c1..f9b1602 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1092,6 +1092,7 @@
       <Reference name="System" localCopy="false"/>
       <Reference name="System.Data" localCopy="false"/>
       <Reference name="System.Xml" localCopy="false"/>
+      <Reference name="Mono.Addins.dll" />
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Console"/>
       <Reference name="OpenSim.Framework.Servers"/>
-- 
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