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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Tango.Core.Helpers;
using Tango.Logging;
using Tango.PPC.Common.WatchDog;
using Tango.SharedUI;
using Tango.SharedUI.Components;
namespace Tango.PPC.WatchDog
{
public class MainWindowVM : ViewModel
{
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);
private const String tango_process_name = "Tango.PPC.UI";
private WatchDogClient _watchdog;
public TextController Log { get; set; }
public MainWindowVM()
{
var logger = new SimpleStringLogger();
logger.LogReceived += Logger_LogReceived;
LogManager.RegisterLogger(logger);
_watchdog = new WatchDogClient();
_watchdog.ServerNotResponding += _watchdog_ServerNotResponding;
Log = new TextController();
_watchdog.Start();
}
private void Logger_LogReceived(object sender, LogItemBase e)
{
if (e is ExceptionLogItem)
{
Log.WriteLine(e.ToString());
}
else
{
Log.WriteLine($"[{e.TimeStamp.ToString()}] {e.Message}");
}
}
private void _watchdog_ServerNotResponding(object sender, EventArgs e)
{
LogManager.Log("PPC application failed to respond!", LogCategory.Warning);
LogManager.Log("Ensuring PPC application is down...");
var appProcess = Process.GetProcessesByName(tango_process_name).FirstOrDefault();
Process p = new Process();
p.StartInfo.CreateNoWindow = true;
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
p.StartInfo.FileName = "wmic";
p.StartInfo.Arguments = String.Format("process where name='{0}' delete", tango_process_name);
try
{
if (appProcess != null)
{
LogManager.Log("PPC application process found and seems to be frozen. Trying to kill the process...");
appProcess.Kill();
appProcess = Process.GetProcessesByName(tango_process_name).FirstOrDefault();
if (appProcess != null)
{
LogManager.Log("Process kill failed. Trying again...");
p.Start();
Thread.Sleep(2000);
appProcess = Process.GetProcessesByName(tango_process_name).FirstOrDefault();
if (appProcess == null)
{
LogManager.Log("PPC application is down.");
}
}
else
{
LogManager.Log("PPC application is down.");
}
}
}
catch
{
try
{
LogManager.Log("Process kill failed. Trying again...");
p.Start();
Thread.Sleep(2000);
appProcess = Process.GetProcessesByName(tango_process_name).FirstOrDefault();
if (appProcess == null)
{
LogManager.Log("PPC application is down.");
}
}
catch { }
}
LogManager.Log("Restarting PPC application...");
try
{
var process = Process.Start(Path.Combine(AssemblyHelper.GetCurrentAssemblyFolder(), tango_process_name + ".exe"));
LogManager.Log("PPC application started.");
LogManager.Log("Waiting for the application main window....");
if (WaitForPPCWindow(TimeSpan.FromSeconds(5), TimeSpan.FromMinutes(1)))
{
LogManager.Log("Application main window opened. waiting another 10 seconds...");
Thread.Sleep(TimeSpan.FromSeconds(10));
_watchdog.Start();
}
else
{
LogManager.Log("The PPC application main window has failed to open within 1 minute. The Watchdog will not start again!");
}
}
catch (Exception ex)
{
LogManager.Log(ex, "Error starting PPC application.");
}
}
private bool WaitForPPCWindow(TimeSpan interval, TimeSpan timeout)
{
for (TimeSpan time = TimeSpan.Zero; time < timeout; time = time.Add(interval))
{
IntPtr windowPtr = FindWindowByCaption(IntPtr.Zero, "Tango - PPC");
if (windowPtr != IntPtr.Zero)
{
return true;
}
Thread.Sleep(interval);
}
return false;
}
}
}
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