//Loads the possible plugin assemblies in a separate AppDomain
//in order to allow unloading of unneeded assemblies
public void LoadPlugins()
{
m_Plugins = new PluginCollection();
if (SearchDirectory == null ||
!Directory.Exists(SearchDirectory))
{
throw new DirectoryNotFoundException("Could not find plugin directory");
}
//The class actually created a new instance of the same class
//only in a different AppDomain. It then passes it all the needed
//parameters such as search path and file extensions.
AppDomain domain = AppDomain.CreateDomain("DynamicPluginLoader");
Assembly asm = domain.Load(Assembly.GetExecutingAssembly().FullName);
DynamicFindPluginProvider finder = (DynamicFindPluginProvider )asm.CreateInstance(typeof(DynamicFindPluginProvider).ToString());
//DynamicFindPluginProvider finder = (DynamicFindPluginProvider )domain.CreateInstanceFromAndUnwrap(,typeof(DynamicFindPluginProvider).ToString() );
finder.FileExtensionFilter = this.FileExtensionFilter;
finder.SearchDirectory = this.SearchDirectory;
ArrayList FoundPluginTypes = finder.SearchPath(this.SearchDirectory);
AppDomain.Unload(domain);
foreach (Type t in FoundPluginTypes)
{
try
{
if (t.IsAbstract)
{
continue;
}
//do not instantiate if this type has the "GenericPlugin" attribute
object[] customAttribs = t.GetCustomAttributes(typeof(GenericPluginAttribute), false);
if (customAttribs.Length > 0)
{
continue;
}
IPlugin plugin = (IPlugin )Activator.CreateInstance(t);
m_Plugins.Add(plugin);
}
catch (Exception e) {}
}
}
// private void InitPlugins()
// {
// PluginLoader loader = new PluginLoader();
// loader.FileName="plugins.xml";
// if(loader.ReadFile() && loader.LoadPlugins())
// {
// m_Plugins= loader.LoadedPlugins;
// }
// foreach (IPlugin plugin in m_Plugins)
// {
// plugin.OnInit(AppContext.Instance);
// }
// }
private static void InitPlugins(AppContext context)
{
DynamicFindPluginProvider loader = new DynamicFindPluginProvider();
loader.FileExtensionFilter="*.dll";
loader.SearchDirectory= AppContext.Instance.Settings.BaseDir;
loader.LoadPlugins();
foreach (IPlugin plugin in loader.LoadedPlugins)
{
if(plugin!=null)
{
context.Plugins.Add(plugin);
plugin.OnInit(context);
}
}
}