/// <summary>
/// 初始化
/// </summary>
public static void Initialize()
{
using (new WriteLockDisposable(Locker))
{
var pluginFolder = new DirectoryInfo(CommonHelper.MapPath(PluginsPath));
_shadowCopyFolder = new DirectoryInfo(CommonHelper.MapPath(ShadowCopyPath));
var referencedPlugins = new List <PluginDescriptor>();
var incompatiblePlugins = new List <string>();
_clearShadowDirectoryOnStartup = !String.IsNullOrEmpty(ConfigurationManager.AppSettings["ClearPluginsShadowDirectoryOnStartup"]) &&
Convert.ToBoolean(ConfigurationManager.AppSettings["ClearPluginsShadowDirectoryOnStartup"]);
try
{
var installedPluginSystemNames = PluginFileParser.ParseInstalledPluginsFile(GetInstalledPluginsFilePath());
Debug.WriteLine("Creating shadow copy folder and querying for dlls");
Directory.CreateDirectory(pluginFolder.FullName);
Directory.CreateDirectory(_shadowCopyFolder.FullName);
//获取bin中所有文件的列表
var binFiles = _shadowCopyFolder.GetFiles("*", SearchOption.AllDirectories);
if (_clearShadowDirectoryOnStartup)
{
foreach (var f in binFiles)
{
Debug.WriteLine("Deleting" + f.Name);
try
{
File.Delete(f.FullName);
}
catch (Exception exc)
{
Debug.WriteLine("Error deleting file " + f.Name + ". Exception: " + exc);
}
}
}
///加载描述文件
foreach (var dfd in GetDescriptionFilesAndDescriptors(pluginFolder))
{
var descriptionFile = dfd.Key;
var pluginDescriptor = dfd.Value;
//var isSupport = pluginDescriptor.SupportedVersions.Contains(SunFrameworkVersion.CurrentVersion, StringComparer.InvariantCultureIgnoreCase);
///确保版本正确
if (!pluginDescriptor.SupportedVersions.Contains(SunFrameworkVersion.CurrentVersion, StringComparer.InvariantCultureIgnoreCase))
{
incompatiblePlugins.Add(pluginDescriptor.SystemName);
continue;
}
//some validation
if (String.IsNullOrWhiteSpace(pluginDescriptor.SystemName))
{
throw new Exception(string.Format("A plugin '{0}' has no system name. Try assigning the plugin a unique name and recompiling.", descriptionFile.FullName));
}
if (referencedPlugins.Contains(pluginDescriptor))
{
throw new Exception(string.Format("A plugin with '{0}' system name is already defined", pluginDescriptor.SystemName));
}
//set 'Installed' property
pluginDescriptor.Installed = installedPluginSystemNames
.FirstOrDefault(x => x.Equals(pluginDescriptor.SystemName, StringComparison.InvariantCultureIgnoreCase)) != null;
try
{
if (descriptionFile.Directory == null)
{
throw new Exception(string.Format("Directory cannot be resolved for '{0}' description file", descriptionFile.Name));
}
//获取插件中所有dll的列表 (not in bin!)
var pluginFiles = descriptionFile.Directory.GetFiles("*dll", SearchOption.AllDirectories)
.Where(x => !binFiles.Select(q => q.Name).Contains(x.FullName))
.Where(x => IsPackagePluginFolder(x.Directory))
.ToList();
//插件其他描述信息
var mainPluginFile = pluginFiles
.FirstOrDefault(x => x.Name.Equals(pluginDescriptor.PluginFileName, StringComparison.InvariantCultureIgnoreCase));
pluginDescriptor.OriginalAssemblyFile = mainPluginFile;
//shadow copy main plugin file
pluginDescriptor.ReferencedAssembly = PerformFileDeploy(mainPluginFile);
//加载所有其他引用的程序集
foreach (var plugin in pluginFiles
.Where(x => !x.Name.Equals(mainPluginFile.Name, StringComparison.InvariantCultureIgnoreCase))
.Where(x => !IsAlreadyLoaded(x)))
{
PerformFileDeploy(plugin);
}
//初始化插件（每个程序集只允许一个插件）
foreach (var t in pluginDescriptor.ReferencedAssembly.GetTypes())
{
if (typeof(IPlugin).IsAssignableFrom(t))
{
if (!t.IsInterface)
{
if (t.IsClass && !t.IsAbstract)
{
pluginDescriptor.PluginType = t;
break;
}
}
}
}
referencedPlugins.Add(pluginDescriptor);
}
catch (ReflectionTypeLoadException ex)
{
//add a plugin name. this way we can easily identify a problematic plugin
var msg = string.Format("Plugin '{0}'. ", pluginDescriptor.FriendlyName);
foreach (var e in ex.LoaderExceptions)
{
msg += e.Message + Environment.NewLine;
}
var fail = new Exception(msg, ex);
throw fail;
}
catch (Exception ex)
{
//add a plugin name. this way we can easily identify a problematic plugin
var msg = string.Format("Plugin '{0}'. {1}", pluginDescriptor.FriendlyName, ex.Message);
var fail = new Exception(msg, ex);
throw fail;
}
}
}
catch (Exception ex)
{
var msg = string.Empty;
for (var e = ex; e != null; e = e.InnerException)
{
msg += e.Message + Environment.NewLine;
}
var fail = new Exception(msg, ex);
throw fail;
}
ReferencedPlugins = referencedPlugins;
IncompatiblePlugins = incompatiblePlugins;
}
}
