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Program.cs
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Program.cs
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using System;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;
using System.ServiceProcess;
using System.Text;
using NLog;
using sensu_client.net.Exceptions;
using sensu_client.net.pluginterface;
namespace sensu_client.net
{
class Program
{
[ImportMany(typeof(ISensuClientPlugin))]
private ISensuClientPlugin[] m_plugins = null;
static Logger _log;
public ISensuClientPlugin[] Plugins => m_plugins;
static void Main()
{
_log = LogManager.GetCurrentClassLogger();
#if DEBUG
LogManager.GlobalThreshold = LogLevel.Trace;
#endif
new Program().Run();
}
static void CurrentDomainUnhandledException(object sender, UnhandledExceptionEventArgs e)
{
_log.Error("Global Exception handler called with exectpion: {0}", e.ExceptionObject);
}
public void LoadPlugins()
{
#region "Loading Plugins"
try
{
_log.Info("Trying to load Plugins...");
string m_plugin_dir = System.IO.Path.Combine(System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), "plugins");
var catalog = new DirectoryCatalog(m_plugin_dir);
var container = new CompositionContainer(catalog);
container.ComposeParts(this);
foreach (ISensuClientPlugin m_plugin in m_plugins)
{
StringBuilder m_plugin_info = new StringBuilder();
try
{
if (m_plugin.Name() != null && !String.IsNullOrWhiteSpace(m_plugin.Name()) && m_plugin.GUID() != null && !String.IsNullOrWhiteSpace(m_plugin.GUID().ToString()))
{
if (m_plugin.Handlers().Count == 0)
{
throw new InvalidPluginException(String.Format("Plugin {0} / {1} has no valid Handlers to register!", m_plugin.Name(), m_plugin.GUID().ToString()));
}
else
{
m_plugin_info.AppendLine(String.Format("Found plugin {0}", m_plugin.Name()));
m_plugin_info.AppendLine(String.Format("Plugin ID: {0}", m_plugin.GUID()));
m_plugin_info.AppendLine(String.Format("Plugin Author: {0}", m_plugin.Author()));
m_plugin_info.AppendLine(String.Format("Plugin Version: {0}", m_plugin.Version()));
m_plugin_info.AppendLine("Plugin Handlers:");
foreach (string m_handler in m_plugin.Handlers())
{
m_plugin_info.AppendLine(String.Format("- {0}", m_handler.ToString()));
}
_log.Info(m_plugin_info.ToString());
try
{
_log.Debug("Calling 'Initialize' of plugin {0}", m_plugin.Name());
m_plugin.Initialize();
_log.Info("Plugin {0} successfully loaded!", m_plugin.Name());
}
catch (Exception ex)
{
_log.Error(ex, "Plugin initializion failed!");
}
}
}
else
{
throw new InvalidPluginException("Invalid Plugin found!");
}
}
catch (InvalidPluginException ex)
{
_log.Error(ex, ex.Message);
}
}
_log.Info("Done - loaded {0} Plugin(s)!", m_plugins.Length);
}
catch (CompositionException compositionException)
{
Console.WriteLine(compositionException.ToString());
}
#endregion
}
public void UnloadPlugins()
{
foreach (ISensuClientPlugin m_plugin in m_plugins)
{
try
{
m_plugin.Dispose();
}
catch
{
_log.Error(string.Format("Dispose of plugin {0} failed", m_plugin.Name()));
}
}
}
void Run()
{
AppDomain.CurrentDomain.UnhandledException += CurrentDomainUnhandledException;
if (Environment.UserInteractive)
{
SensuClient.Start();
Console.CancelKeyPress += delegate
{
_log.Info("Cancel Key Pressed. Shutting Down.");
};
}
else
{
var servicesToRun = new ServiceBase[] { new SensuClient() };
ServiceBase.Run(servicesToRun);
}
}
}
}