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Lidarr/NzbDrone/Providers/MonitoringProvider.cs

122 lines
4.2 KiB

using System;
using System.Diagnostics;
using System.Net;
using System.Runtime.Remoting;
using System.Threading;
using NLog;
using NzbDrone.Common;
using NzbDrone.Common.Model;
namespace NzbDrone.Providers
{
public class MonitoringProvider
{
private static readonly Logger logger = LogManager.GetLogger("Host.MonitoringProvider");
private readonly IISProvider _iisProvider;
private readonly ProcessProvider _processProvider;
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private readonly HttpProvider _httpProvider;
private readonly ConfigFileProvider _configFileProvider;
private int _pingFailCounter;
private Timer _pingTimer;
private Timer _processPriorityCheckTimer;
public MonitoringProvider(ProcessProvider processProvider, IISProvider iisProvider,
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HttpProvider httpProvider, ConfigFileProvider configFileProvider)
{
_processProvider = processProvider;
_iisProvider = iisProvider;
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_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(_iisProvider.IISProcessId);
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 (!_iisProvider.ServerStarted) return;
try
{
ICredentials identity = CredentialCache.DefaultCredentials;
_httpProvider.DownloadString(_iisProvider.AppUrl, identity); //This should preload the home page, making the first load faster.
string response = _httpProvider.DownloadString(_iisProvider.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;
_iisProvider.RestartServer();
}
}
}
private void ProgramExited(object sender, EventArgs e)
{
_iisProvider.StopServer();
}
public static void AppDomainException(Exception excepion)
{
Console.WriteLine("EPIC FAIL: {0}", excepion);
logger.FatalException("EPIC FAIL: " + excepion.Message, excepion);
}
}
}