private PluginDescriptor LoadPlugin(string pluginAssemblyPath)
{
PluginDescriptorInternal pluginDescriptor = null;
try
{
var setup = AppDomain.CurrentDomain.SetupInformation;
setup.PrivateBinPath = PluginDirectory;
var appDomain = AppDomain.CreateDomain(string.Format("Plugin_{0}", Guid.NewGuid()), null, setup);
pluginDescriptor = new PluginDescriptorInternal(appDomain, null, null, pluginAssemblyPath);
var handler = new PluginUnhandledExceptionHandler(pluginDescriptor);
handler.UnhandledExceptionOccurred += (sender, args) =>
{
OnUnhandledExceptionOccurred(args);
};
var pluginWrapper =
(PluginWrapper)
appDomain.CreateInstanceAndUnwrap(Assembly.GetExecutingAssembly().FullName,
typeof(PluginWrapper).FullName);
pluginWrapper.CreatePluginInstance(pluginAssemblyPath);
pluginDescriptor.DataReaderPlugin = pluginWrapper;
pluginDescriptor.FriendlyName = pluginWrapper.FriendlyName;
pluginDescriptor.Id = pluginWrapper.Id;
_descriptors[pluginWrapper.Id] = pluginDescriptor;
return pluginDescriptor.ToPluginDescriptor();
}
catch (Exception e)
{
if (pluginDescriptor != null)
{
UnloadPlugin(pluginDescriptor);
}
throw;
}
}
internal void UnloadPlugin(PluginDescriptorInternal pluginDescriptor)
{
try
{
UnloadPluginDomain(pluginDescriptor);
}
catch (CannotUnloadAppDomainException unloadAppDomainException)
{
throw new PluginLoadingException("Cannot unload the plugin.", unloadAppDomainException);
}
}
private void UnloadPluginDomain(PluginDescriptorInternal descriptor)
{
if (descriptor == null || descriptor.AppDomain == null)
{
return;
}
try
{
AppDomain.Unload(descriptor.AppDomain);
}
finally
{
descriptor.AppDomain = null;
descriptor.DataReaderPlugin = null;
}
}
public PluginUnhandledExceptionHandler(PluginDescriptorInternal pluginDescriptor)
{
_pluginDescriptor = pluginDescriptor;
_pluginDescriptor.AppDomain.UnhandledException += PluginAppDomainUnhandledException;
}