public async Task <bool> StartAsync()
{
MonitoringSuspended = true;
EnsureDead(Process);
string commandLineArgs = string.Empty;
string executablePath = ExecutablePath;
try
{
if (Port < 0)
{
Port = GrpcUtils.GetFreeTcpPort();
}
commandLineArgs = CommandLineArguments?
.Replace("{HostName}", HostName)
.Replace("{Port}", Port.ToString());
executablePath = GetActualExePath();
_logger.LogInformation(
"Starting {executablePath} with parameters {commandLineArgs}...",
executablePath, commandLineArgs);
Process = ProcessUtils.StartProcess(executablePath, commandLineArgs,
false, true, EnvironmentVariables);
// Very important. Otherwise the process hangs once the buffer is full.
Process.BeginOutputReadLine();
Process.BeginErrorReadLine();
double startupWait =
StartupWaitSeconds == 0 ? _defaultStartupWait : StartupWaitSeconds;
TimeSpan startupWaitTime = TimeSpan.FromSeconds(startupWait);
_logger.LogDebug("Configured startup wait time is {startupWaitSeconds}s...",
startupWait);
// Let the process start the services...
await Task.Delay(startupWaitTime);
bool healthy = await IsServingAsync();
if (healthy)
{
_logger.LogInformation("Successfully started {process}", this);
}
else
{
_logger.LogWarning("Startup of {process} has failed", this);
}
return(healthy);
}
catch (Exception e)
{
string errorMessage = e.Message;
_logger.LogError(e,
"Error starting {ExecutablePath} with parameters {CommandLineArguments}: {errorMessage}",
executablePath, commandLineArgs, errorMessage);
return(false);
}
finally
{
MonitoringSuspended = false;
}
}