Logging Output of Azure Startup Tasks to the Event Log
- by Your DisplayName here!
This can come in handy when troubleshooting:
using System;
using System.Diagnostics;
using System.Text;
namespace Thinktecture.Azure
{
class Program
{
static EventLog _eventLog
= new EventLog("Application", ".", "StartupTaskShell");
static StringBuilder _out
= new StringBuilder(64);
static StringBuilder _err
= new StringBuilder(64);
static int Main(string[]
args)
{
if (args.Length
!= 1)
{
Console.WriteLine("Invalid
arguments: " + String.Join(",
",
args));
_eventLog.WriteEntry("Invalid
arguments: " + String.Join(",
",
args));
return -1;
}
var task
= args[0];
ProcessStartInfo info
= new ProcessStartInfo()
{
FileName = task,
WorkingDirectory = Environment.CurrentDirectory,
UseShellExecute = false,
ErrorDialog = false,
CreateNoWindow = true,
RedirectStandardOutput = true,
RedirectStandardError = true
};
var process
= new Process();
process.StartInfo = info;
process.OutputDataReceived += (s, e) =>
{
if (e.Data
!= null)
{
_out.AppendLine(e.Data);
}
};
process.ErrorDataReceived += (s, e) =>
{
if (e.Data
!= null)
{
_err.AppendLine(e.Data);
}
};
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();
var outString
= _out.ToString();
var errString
= _err.ToString();
if (!string.IsNullOrWhiteSpace(outString))
{
outString = String.Format("Standard
Out for {0}\n\n{1}",
task, outString);
_eventLog.WriteEntry(outString, EventLogEntryType.Information);
}
if (!string.IsNullOrWhiteSpace(errString))
{
errString = String.Format("Standard
Err for {0}\n\n{1}",
task, errString);
_eventLog.WriteEntry(errString, EventLogEntryType.Error);
}
return 0;
}
}
}
You then wrap your startup tasks with the StartupTaskShell and you’ll be able to see
stdout and stderr in the application event log.
