void RestartProcess(Process proc)
{
Logger.Log(string.Format("Trying to restart application {0}", proc.StartInfo.FileName));
BackOffHandler.WaitAppropriateAmountOfTime(proc.StartInfo);
if (ShouldProcessBeRestarted(proc))
{
// It seems like we cannot capture output to the stdout or stderr when we restart the process (we get no events),
// and calling BeginOutputReadLine fails, so... we create a new process object altogether.
processes.Remove(proc);
var app = GetApplication(proc);
proc = new Process
{
StartInfo = proc.StartInfo
};
ConfigureProcess(proc, app);
processes.Add(proc);
proc.Start();
proc.BeginOutputReadLine();
proc.BeginErrorReadLine();
BackOffHandler.RegisterProcessStart(proc.StartInfo);
Logger.Log(string.Format("Application {0} restarted with PID {1}", proc.StartInfo.FileName, proc.Id));
}
}
void StartApplication(Application app)
{
var proc = new Process();
processes.Add(proc);
proc.StartInfo.FileName = app.FileName;
proc.StartInfo.Arguments = string.Join(" ", app.Arguments.ToArray());
//proc.StartInfo.CreateNoWindow = true;
foreach (var env in app.EnvironmentVariables)
{
Logger.Log(String.Format("Adding environment variable {0} with value {1}", env.Key, env.Value));
proc.StartInfo.EnvironmentVariables[env.Key] = env.Value;
}
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardError = true;
proc.StartInfo.RedirectStandardInput = true;
proc.StartInfo.RedirectStandardOutput = true;
ConfigureProcess(proc, app);
Logger.Log(string.Format("Starting application {0} with arguments {1}", app.FileName, string.Join(" ", app.Arguments.ToArray())));
try
{
proc.Start();
proc.BeginOutputReadLine();
proc.BeginErrorReadLine();
BackOffHandler.RegisterProcessStart(proc.StartInfo);
Logger.Log(string.Format("Application {0} started with PID {1}", app.FileName, proc.Id));
}
catch (Win32Exception e)
{
// FIXME: What is the correct action to take here?
Logger.Log(string.Format("Application {0} failed to start: {1}. Terminating service.", app.FileName, e.Message));
throw new Exception("One or more applications failed to start. Service terminating.", e);
}
}
