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Sonarr/NzbDrone/Providers/MonitoringProvider.cs
2013-02-18 17:57:28 -08:00

121 lines
4.3 KiB
C#

using System;
using System.Diagnostics;
using System.Net;
using System.Runtime.Remoting;
using System.Threading;
using NLog;
using NzbDrone.Common;
namespace NzbDrone.Providers
{
public class MonitoringProvider
{
private static readonly Logger logger = LogManager.GetLogger("Host.MonitoringProvider");
private readonly IHostController _hostController;
private readonly ProcessProvider _processProvider;
private readonly HttpProvider _httpProvider;
private readonly ConfigFileProvider _configFileProvider;
private int _pingFailCounter;
private Timer _pingTimer;
private Timer _processPriorityCheckTimer;
public MonitoringProvider(ProcessProvider processProvider, IHostController hostController,
HttpProvider httpProvider, ConfigFileProvider configFileProvider)
{
_processProvider = processProvider;
_hostController = hostController;
_httpProvider = httpProvider;
_configFileProvider = configFileProvider;
}
public MonitoringProvider()
{
}
public void Start()
{
AppDomain.CurrentDomain.UnhandledException += ((s, e) => AppDomainException(e.ExceptionObject as Exception));
AppDomain.CurrentDomain.ProcessExit += ProgramExited;
AppDomain.CurrentDomain.DomainUnload += ProgramExited;
_processPriorityCheckTimer = new Timer(EnsurePriority);
_processPriorityCheckTimer.Change(TimeSpan.FromSeconds(15), TimeSpan.FromMinutes(30));
_pingTimer = new Timer(PingServer);
_pingTimer.Change(TimeSpan.FromSeconds(5), TimeSpan.FromMinutes(1));
}
public virtual void EnsurePriority(object sender)
{
try
{
var currentProcess = _processProvider.GetCurrentProcess();
if (currentProcess.Priority != ProcessPriorityClass.Normal)
{
_processProvider.SetPriority(currentProcess.Id, ProcessPriorityClass.Normal);
}
var iisProcess = _processProvider.GetProcessById(_processProvider.GetCurrentProcess().Id);
if (iisProcess != null && iisProcess.Priority != ProcessPriorityClass.Normal &&
iisProcess.Priority != ProcessPriorityClass.AboveNormal)
{
_processProvider.SetPriority(iisProcess.Id, ProcessPriorityClass.Normal);
}
}
catch (Exception e)
{
logger.WarnException("Unable to verify priority", e);
}
}
public virtual void PingServer(object sender)
{
if (!_hostController.ServerStarted) return;
try
{
ICredentials identity = CredentialCache.DefaultCredentials;
_httpProvider.DownloadString(_hostController.AppUrl, identity); //This should preload the home page, making the first load faster.
string response = _httpProvider.DownloadString(_hostController.AppUrl + "/health", identity);
if (!response.Contains("OK"))
{
throw new ServerException("Health services responded with an invalid response.");
}
if (_pingFailCounter > 0)
{
logger.Info("Application pool has been successfully recovered.");
}
_pingFailCounter = 0;
}
catch (Exception ex)
{
_pingFailCounter++;
logger.Error("Application pool is not responding. Count: {0} - {1}", _pingFailCounter, ex.Message);
if (_pingFailCounter >= 10)
{
_pingFailCounter = 0;
_hostController.RestartServer();
}
}
}
private void ProgramExited(object sender, EventArgs e)
{
_hostController.StopServer();
}
public static void AppDomainException(Exception excepion)
{
Console.WriteLine("EPIC FAIL: {0}", excepion);
logger.FatalException("EPIC FAIL: " + excepion.Message, excepion);
}
}
}