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ServiceBase.cs 4.6 KB

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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 OpenSimulator 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. using System;
  28. using System.IO;
  29. using System.Collections.Generic;
  30. using System.Reflection;
  31. using log4net;
  32. using Nini.Config;
  33. using OpenSim.Services.Interfaces;
  34. namespace OpenSim.Services.Base
  35. {
  36. public class ServiceBase
  37. {
  38. private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
  39. public T LoadPlugin<T>(string dllName) where T:class
  40. {
  41. return LoadPlugin<T>(dllName, new Object[0]);
  42. }
  43. public T LoadPlugin<T>(string dllName, Object[] args) where T:class
  44. {
  45. // The path:type separator : is unfortunate because it collides
  46. // with Windows paths like C:\...
  47. // When the path provided includes the drive, this fails.
  48. // Hence the root/noroot thing going on here.
  49. string pathRoot = Path.GetPathRoot(dllName);
  50. string noRoot = dllName.Substring(pathRoot.Length);
  51. string[] parts = noRoot.Split(new char[] {':'});
  52. dllName = pathRoot + parts[0];
  53. string className = String.Empty;
  54. if (parts.Length > 1)
  55. className = parts[1];
  56. return LoadPlugin<T>(dllName, className, args);
  57. }
  58. public T LoadPlugin<T>(string dllName, string className, Object[] args) where T:class
  59. {
  60. string interfaceName = typeof(T).ToString();
  61. try
  62. {
  63. Assembly pluginAssembly = Assembly.LoadFrom(dllName);
  64. // m_log.DebugFormat("[SERVICE BASE]: Found assembly {0}", dllName);
  65. foreach (Type pluginType in pluginAssembly.GetTypes())
  66. {
  67. // m_log.DebugFormat("[SERVICE BASE]: Found type {0}", pluginType);
  68. if (pluginType.IsPublic)
  69. {
  70. if (className != String.Empty &&
  71. pluginType.ToString() !=
  72. pluginType.Namespace + "." + className)
  73. continue;
  74. Type typeInterface =
  75. pluginType.GetInterface(interfaceName);
  76. if (typeInterface != null)
  77. {
  78. T plug = (T)Activator.CreateInstance(pluginType,
  79. args);
  80. return plug;
  81. }
  82. }
  83. }
  84. return null;
  85. }
  86. catch (Exception e)
  87. {
  88. List<string> strArgs = new List<string>();
  89. foreach (Object arg in args)
  90. strArgs.Add(arg.ToString());
  91. m_log.Error(
  92. string.Format(
  93. "[SERVICE BASE]: Failed to load plugin {0} from {1} with args {2}",
  94. interfaceName, dllName, string.Join(", ", strArgs.ToArray())), e);
  95. return null;
  96. }
  97. }
  98. public ServiceBase(IConfigSource config)
  99. {
  100. }
  101. }
  102. }