/// <summary>
/// Unloads a <see cref="PluginAppDomain"/>.
/// </summary>
public void Unload(PluginAppDomain appdomain)
{
if (!Contains(appdomain))
{
return;
}
OnAppDomainUnloading(appdomain);
appdomains.Remove(appdomain.AssemblyName.FullName);
appdomain.Unload();
}
protected void OnAppDomainUnloading(PluginAppDomain appDomain)
{
AppDomainEventHandler appDomainUnloading = AppDomainUnloading;
if (appDomainUnloading == null)
{
return; // no listeners
}
appDomainUnloading(appDomain);
}
protected void OnAppDomainLoaded(PluginAppDomain appDomain)
{
AppDomainEventHandler appDomainLoaded = AppDomainLoaded;
if (appDomainLoaded == null)
{
return; // no listeners
}
appDomainLoaded(appDomain);
}
/// <summary>
/// Unloads all plugin assemblies.
/// </summary>
public void UnloadAll()
{
lock ( appdomains )
{
PluginAppDomain[] appdomainsArray = new PluginAppDomain[appdomains.Count];
appdomains.Values.CopyTo(appdomainsArray, 0);
for (int i = 0; i < appdomainsArray.Length; i++)
{
Unload(appdomainsArray[i]);
}
}
}
/// <summary>
/// Loads all plugin assemblies found in a given directory.
/// </summary>
/// <param name="assemblyDirectory">
/// The file system directory to scan for plugins.
/// </param>
/// <returns>
/// A list of all <see cref="PluginAppDomain"/> objects
/// created to host the plugin assemblies.
/// </returns>
public PluginAppDomain[] LoadAll(string assemblyDirectory)
{
ArrayList domainsLoaded = new ArrayList();
foreach (string filename in Directory.GetFiles(assemblyDirectory, "*.dll"))
{
PluginAppDomain appdomain = Load(filename);
if (appdomain != null)
{
domainsLoaded.Add(appdomain);
}
}
return((PluginAppDomain[])domainsLoaded.ToArray(typeof(PluginAppDomain)));
}
private void pluginAppDomains_AppDomainLoaded(PluginAppDomain appDomain)
{
foreach (IPlugin plugin in appDomain.Handlers)
{
Console.WriteLine("Starting {0} handler plugin.", plugin.Name);
plugin.Startup(Server);
Plugins.Add(plugin);
}
foreach (IPlugin plugin in appDomain.Filters)
{
Console.WriteLine("Starting {0} filter plugin.", plugin.Name);
plugin.Startup(Server);
Plugins.Add(plugin);
}
OnChanged();
}
/// <summary>
/// Loads the plugins in a given assembly into the server.
/// </summary>
/// <param name="assemblyName">
/// The <see cref="AssemblyName"/> of the plugin assembly to load.
/// </param>
/// <returns>
/// The <see cref="PluginAppDomain"/> created to host the
/// loaded assembly.
/// </returns>
public PluginAppDomain Load(AssemblyName assemblyName)
{
try
{
if (appdomains.Contains(assemblyName.FullName))
{
throw new InvalidOperationException("Assembly already loaded.");
}
PluginAppDomain appdomain = new PluginAppDomain(assemblyName);
// Keep track of the appdomain so we can unload it if the plugin changes or is removed.
appdomains.Add(assemblyName.FullName, appdomain);
OnAppDomainLoaded(appdomain);
return(appdomain);
}
catch (Exception ex)
{
Console.Error.WriteLine("Error loading assembly: {0}" + Environment.NewLine + "{1}", assemblyName.FullName, ex.ToString());
return(null);
}
}
private void pluginAppDomains_AppDomainUnloading(PluginAppDomain appDomain)
{
foreach (IPlugin plugin in appDomain.Filters)
{
Plugins.Remove(plugin);
Console.WriteLine("Stopping {0} filter plugin.", plugin.Name);
plugin.Shutdown();
}
foreach (IPlugin plugin in appDomain.Handlers)
{
Plugins.Remove(plugin);
try
{
Console.WriteLine("Stopping {0} handler plugin.", plugin.Name);
plugin.Shutdown();
}
catch (System.Runtime.Remoting.RemotingException ex)
{
Console.Error.WriteLine("Plugin disconnected prematurely.\n{0}", ex.ToString());
}
}
OnChanged();
}
protected void OnAppDomainUnloading(PluginAppDomain appDomain)
{
AppDomainEventHandler appDomainUnloading = AppDomainUnloading;
if( appDomainUnloading == null ) return; // no listeners
appDomainUnloading(appDomain);
}
protected void OnAppDomainLoaded(PluginAppDomain appDomain)
{
AppDomainEventHandler appDomainLoaded = AppDomainLoaded;
if( appDomainLoaded == null ) return; // no listeners
appDomainLoaded(appDomain);
}
/// <summary>
/// Unloads all plugin assemblies.
/// </summary>
public void UnloadAll()
{
lock( appdomains )
{
PluginAppDomain[] appdomainsArray = new PluginAppDomain[appdomains.Count];
appdomains.Values.CopyTo(appdomainsArray, 0);
for( int i = 0; i < appdomainsArray.Length; i++ )
Unload(appdomainsArray[i]);
}
}
/// <summary>
/// Unloads a <see cref="PluginAppDomain"/>.
/// </summary>
public void Unload(PluginAppDomain appdomain)
{
if( !Contains( appdomain ) ) return;
OnAppDomainUnloading(appdomain);
appdomains.Remove( appdomain.AssemblyName.FullName );
appdomain.Unload();
}
/// <summary>
/// Loads the plugins in a given assembly into the server.
/// </summary>
/// <param name="assemblyName">
/// The <see cref="AssemblyName"/> of the plugin assembly to load.
/// </param>
/// <returns>
/// The <see cref="PluginAppDomain"/> created to host the
/// loaded assembly.
/// </returns>
public PluginAppDomain Load(AssemblyName assemblyName)
{
try
{
if( appdomains.Contains(assemblyName.FullName) ) throw new InvalidOperationException("Assembly already loaded.");
PluginAppDomain appdomain = new PluginAppDomain(assemblyName);
// Keep track of the appdomain so we can unload it if the plugin changes or is removed.
appdomains.Add( assemblyName.FullName, appdomain );
OnAppDomainLoaded(appdomain);
return appdomain;
}
catch( Exception ex )
{
Console.Error.WriteLine("Error loading assembly: {0}" + Environment.NewLine + "{1}", assemblyName.FullName, ex.ToString());
return null;
}
}
/// <summary>
/// Checks whether a given <see cref="PluginAppDomain"/> is already
/// a member of this collection.
/// </summary>
public bool Contains(PluginAppDomain appdomain)
{
return Contains(appdomain.AssemblyName);
}
/// <summary>
/// Checks whether a given <see cref="PluginAppDomain"/> is already
/// a member of this collection.
/// </summary>
public bool Contains(PluginAppDomain appdomain)
{
return(Contains(appdomain.AssemblyName));
}
