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allow service to restart itself

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This commit is contained in:
Luke Pulverenti 2013-09-27 17:09:21 -04:00
parent df29ed5a6f
commit 207fbbbcc3
4 changed files with 124 additions and 74 deletions
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7
MediaBrowser.Mono.userprefs
View file

@ -2,10 +2,9 @@
<MonoDevelop.Ide.Workspace ActiveConfiguration="Debug|x86" />
<MonoDevelop.Ide.Workbench ActiveDocument="MediaBrowser.Server.Mono\Program.cs">
<Files>
<File FileName="MediaBrowser.Server.Mono\Program.cs" Line="3" Column="40" />
<File FileName="MediaBrowser.Server.Mono\Native\NativeApp.cs" Line="1" Column="1" />
<File FileName="d:\Development\MediaBrowser\MediaBrowser.Common.Implementations\Logging\NLogger.cs" Line="1" Column="1" />
<File FileName="d:\Development\MediaBrowser\MediaBrowser.Common.Implementations\BaseApplicationHost.cs" Line="1" Column="1" />
<File FileName="MediaBrowser.Server.Mono\app.config" Line="10" Column="44" />
<File FileName="MediaBrowser.ServerApplication\ApplicationHost.cs" Line="1" Column="1" />
<File FileName="MediaBrowser.Server.Mono\Program.cs" Line="63" Column="5" />
</Files>
</MonoDevelop.Ide.Workbench>
<MonoDevelop.Ide.DebuggingService.Breakpoints>

2
MediaBrowser.Server.Mono/Program.cs
View file

@ -81,7 +81,7 @@ namespace MediaBrowser.Server.Mono
private static ServerApplicationPaths CreateApplicationPaths()
{
return new ServerApplicationPaths("D:\\MonoTest");
return new ServerApplicationPaths();
}
private static void RunApplication(ServerApplicationPaths appPaths, ILogManager logManager)

2
MediaBrowser.Server.Mono/app.config
View file

@ -7,7 +7,7 @@
<targets async="true"></targets>
</nlog>
<appSettings>
<add key="DebugProgramDataPath" value="..\..\..\..\ProgramData-Server" />
<add key="DebugProgramDataPath" value="ProgramData-Server" />
<add key="ReleaseProgramDataPath" value="%ApplicationData%" />
<add key="ProgramDataFolderName" value="MediaBrowser-Server" />
</appSettings>

187
MediaBrowser.ServerApplication/MainStartup.cs
View file

@ -5,31 +5,28 @@ using MediaBrowser.Model.Logging;
using MediaBrowser.Server.Implementations;
using Microsoft.Win32;
using System;
using System.ComponentModel;
using System.Configuration.Install;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.ServiceProcess;
using System.Threading;
using System.Windows;
namespace MediaBrowser.ServerApplication
{
public class MainStartup
{
/// <summary>
/// The single instance mutex
/// </summary>
private static Mutex _singleInstanceMutex;
private static ApplicationHost _appHost;
private static App _app;
private static BackgroundService _backgroundService;
private static ILogger _logger;
private static bool _isRestarting = false;
private static bool _isRunningAsService = false;
/// <summary>
/// Defines the entry point of the application.
/// </summary>
@ -37,9 +34,9 @@ namespace MediaBrowser.ServerApplication
public static void Main()
{
var startFlag = Environment.GetCommandLineArgs().ElementAtOrDefault(1);
var runService = string.Equals(startFlag, "-service", StringComparison.OrdinalIgnoreCase);
_isRunningAsService = string.Equals(startFlag, "-service", StringComparison.OrdinalIgnoreCase);
var appPaths = CreateApplicationPaths(runService);
var appPaths = CreateApplicationPaths(_isRunningAsService);
var logManager = new NlogManager(appPaths.LogDirectoryPath, "server");
logManager.ReloadLogger(LogSeverity.Info);
@ -82,15 +79,12 @@ namespace MediaBrowser.ServerApplication
AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
bool createdNew;
RunServiceInstallationIfNeeded();
var runningPath = Process.GetCurrentProcess().MainModule.FileName.Replace(Path.DirectorySeparatorChar.ToString(), string.Empty);
var currentProcess = Process.GetCurrentProcess();
_singleInstanceMutex = new Mutex(true, @"Local\" + runningPath, out createdNew);
if (!createdNew)
if (IsAlreadyRunning(currentProcess))
{
_singleInstanceMutex = null;
logger.Info("Shutting down because another instance of Media Browser Server is already running.");
return;
}
@ -103,18 +97,49 @@ namespace MediaBrowser.ServerApplication
try
{
RunApplication(appPaths, logManager, runService);
RunApplication(appPaths, logManager, _isRunningAsService);
}
finally
{
logger.Info("Shutting down");
ReleaseMutex(logger);
_appHost.Dispose();
OnServiceShutdown();
}
}
/// <summary>
/// Determines whether [is already running] [the specified current process].
/// </summary>
/// <param name="currentProcess">The current process.</param>
/// <returns><c>true</c> if [is already running] [the specified current process]; otherwise, <c>false</c>.</returns>
private static bool IsAlreadyRunning(Process currentProcess)
{
var runningPath = Process.GetCurrentProcess().MainModule.FileName;
var duplicate = Process.GetProcesses().FirstOrDefault(i =>
{
try
{
return string.Equals(runningPath, i.MainModule.FileName) && currentProcess.Id != i.Id;
}
catch (Win32Exception)
{
return false;
}
});
if (duplicate != null)
{
_logger.Info("Found a duplicate process. Giving it time to exit.");
if (!duplicate.WaitForExit(5000))
{
_logger.Info("The duplicate process did not exit.");
return true;
}
}
return false;
}
/// <summary>
/// Creates the application paths.
/// </summary>
@ -159,8 +184,6 @@ namespace MediaBrowser.ServerApplication
{
SystemEvents.SessionEnding += SystemEvents_SessionEnding;
var commandLineArgs = Environment.GetCommandLineArgs();
_appHost = new ApplicationHost(appPaths, logManager);
_app = new App(_appHost, _appHost.LogManager.GetLogger("App"), runService);
@ -178,20 +201,11 @@ namespace MediaBrowser.ServerApplication
/// </summary>
private static void StartService(ILogManager logManager)
{
var ctl = ServiceController.GetServices().FirstOrDefault(s => s.ServiceName == BackgroundService.Name);
if (ctl == null)
{
RunServiceInstallation();
}
var service = new BackgroundService(logManager.GetLogger("Service"));
service.Disposed += service_Disposed;
ServiceBase.Run(service);
_backgroundService = service;
}
/// <summary>
@ -199,9 +213,27 @@ namespace MediaBrowser.ServerApplication
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
static async void service_Disposed(object sender, EventArgs e)
static void service_Disposed(object sender, EventArgs e)
{
await _appHost.Shutdown();
OnServiceShutdown();
}
private static void OnServiceShutdown()
{
_logger.Info("Shutting down");
_appHost.Dispose();
if (_isRestarting)
{
using (var process = Process.Start("cmd", "/c net start " + BackgroundService.Name))
{
}
_logger.Info("New service process started");
}
_app.Dispatcher.Invoke(_app.Shutdown);
}
/// <summary>
@ -242,6 +274,16 @@ namespace MediaBrowser.ServerApplication
}
}
private static void RunServiceInstallationIfNeeded()
{
var ctl = ServiceController.GetServices().FirstOrDefault(s => s.ServiceName == BackgroundService.Name);
if (ctl == null)
{
RunServiceInstallation();
}
}
/// <summary>
/// Runs the service installation.
/// </summary>
@ -299,7 +341,7 @@ namespace MediaBrowser.ServerApplication
/// <param name="e">The <see cref="SessionEndingEventArgs"/> instance containing the event data.</param>
static void SystemEvents_SessionEnding(object sender, SessionEndingEventArgs e)
{
if (e.Reason == SessionEndReasons.SystemShutdown || _backgroundService == null)
if (e.Reason == SessionEndReasons.SystemShutdown || !_isRunningAsService)
{
Shutdown();
}
@ -316,7 +358,7 @@ namespace MediaBrowser.ServerApplication
_logger.ErrorException("UnhandledException", exception);
if (_backgroundService == null)
if (!_isRunningAsService)
{
_app.OnUnhandledException(exception);
}
@ -327,24 +369,6 @@ namespace MediaBrowser.ServerApplication
}
}
/// <summary>
/// Releases the mutex.
/// </summary>
internal static void ReleaseMutex(ILogger logger)
{
if (_singleInstanceMutex == null)
{
return;
}
logger.Debug("Releasing mutex");
_singleInstanceMutex.ReleaseMutex();
_singleInstanceMutex.Close();
_singleInstanceMutex.Dispose();
_singleInstanceMutex = null;
}
/// <summary>
/// Performs the update if needed.
/// </summary>
@ -378,40 +402,67 @@ namespace MediaBrowser.ServerApplication
public static void Shutdown()
{
if (_backgroundService != null)
if (_isRunningAsService)
{
_backgroundService.Stop();
ShutdownWindowsService();
}
else
{
_app.Dispatcher.Invoke(_app.Shutdown);
ShutdownWindowsApplication();
}
}
public static void Restart()
{
// Second instance will start first, so release the mutex and dispose the http server ahead of time
_app.Dispatcher.Invoke(() => ReleaseMutex(_logger));
_logger.Info("Disposing app host");
_appHost.Dispose();
_logger.Info("Starting new instance of server");
RestartInternal();
_app.Dispatcher.Invoke(_app.Shutdown);
_logger.Info("Shutting down existing instance of server.");
Shutdown();
}
private static void RestartInternal()
{
if (_backgroundService == null)
if (!_isRunningAsService)
{
System.Windows.Forms.Application.Restart();
_logger.Info("Starting server application");
RestartWindowsApplication();
}
else
{
//var controller = new ServiceController()
//{
// ServiceName = BackgroundService.Name
//};
_logger.Info("Starting windows service");
RestartWindowsService();
}
}
private static void RestartWindowsApplication()
{
System.Windows.Forms.Application.Restart();
}
private static void RestartWindowsService()
{
_isRestarting = true;
}
private static void ShutdownWindowsApplication()
{
_app.Dispatcher.Invoke(_app.Shutdown);
}
private static void ShutdownWindowsService()
{
_logger.Info("Stopping background service");
var service = new ServiceController(BackgroundService.Name);
service.Refresh();
if (service.Status == ServiceControllerStatus.Running)
{
service.Stop();
}
}
}