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-rw-r--r--OpenSim/Framework/PluginLoader.cs115
1 files changed, 115 insertions, 0 deletions
diff --git a/OpenSim/Framework/PluginLoader.cs b/OpenSim/Framework/PluginLoader.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSim Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.IO;
30using System.Collections.Generic;
31using System.Reflection;
32using log4net;
33using Mono.Addins;
34
35namespace OpenSim.Framework
36{
37 public class PluginLoader <T> : IDisposable where T : IPlugin
38 {
39 private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
40 private List<T> loaded = new List<T>();
41
42 public PluginLoader (string dir)
43 {
44 AddPluginDir (dir);
45 }
46
47 public void AddPluginDir (string dir)
48 {
49 suppress_console_output_ (true);
50 AddinManager.Initialize (dir);
51 suppress_console_output_ (false);
52 }
53
54 public delegate void Initialiser (IPlugin p);
55 private void default_initialiser_ (IPlugin p) { p.Initialise(); }
56
57 public void Load (string extpoint)
58 {
59 Load (extpoint, default_initialiser_);
60 }
61
62 public void Load (string extpoint, Initialiser initialize)
63 {
64 AddinManager.Registry.Update (null);
65
66 ExtensionNodeList ns = AddinManager.GetExtensionNodes(extpoint);
67 foreach (TypeExtensionNode n in ns)
68 {
69 T p = (T) n.CreateInstance();
70 initialize (p);
71 Plugins.Add (p);
72
73 log.Info("[PLUGINS]: Loading plugin " + n.Path + "/" + p.Name);
74 }
75 }
76
77 public List<T> Plugins
78 {
79 get { return loaded; }
80 }
81
82 public void Dispose ()
83 {
84 foreach (T p in Plugins)
85 p.Dispose ();
86 }
87
88 public void ClearCache()
89 {
90 // The Mono addin manager (in Mono.Addins.dll version 0.2.0.0) occasionally seems to corrupt its addin cache
91 // Hence, as a temporary solution we'll remove it before each startup
92 if (Directory.Exists("addin-db-000"))
93 Directory.Delete("addin-db-000", true);
94
95 if (Directory.Exists("addin-db-001"))
96 Directory.Delete("addin-db-001", true);
97 }
98
99 private static TextWriter prev_console_;
100 public void suppress_console_output_ (bool save)
101 {
102 if (save)
103 {
104 prev_console_ = System.Console.Out;
105 System.Console.SetOut(new StreamWriter(Stream.Null));
106 }
107 else
108 {
109 if (prev_console_ != null)
110 System.Console.SetOut(prev_console_);
111 }
112 }
113
114 }
115}