public override async Task Start(string args)
{
await _process.Start($"{args} --InitializationPipeName {_ipcConnection.ConnectionId}");
try
{
await _ipcConnection.Connect().Timeout(_config.IpcConnectTimeout,
$"Connecting to initialization pipe has timed out, make sure that the app {this.Identity} is connecting to the same pipe");
Trace.TraceInformation($"Yams is waiting for the app {this.Identity} to finish initializing");
string msg = await _ipcConnection.ReadMessage()
.Timeout(_config.AppInitTimeout, $"Did not receive initialized message from the app {ExePath}");
if (msg != "[INITIALIZE_DONE]")
{
throw new InvalidOperationException($"Unexpected message '{msg}' received from app {this.Identity}");
}
}
catch (Exception)
{
await Kill();
throw;
}
Trace.TraceInformation($"Received initialized message from App {this.Identity}; App is ready to receive requests");
}
private void MonitorProcessHealth()
{
_watchProcessHealthCancellationTokenSource = new CancellationTokenSource();
CancellationToken cancellationToken = _watchProcessHealthCancellationTokenSource.Token;
_watchProcessHealthTask = Task.Run(async() =>
{
while (!cancellationToken.IsCancellationRequested)
{
Trace.TraceInformation("Waiting for heart beat from app");
Task <string> readMessageTask = _ipcConnection.ReadMessage();
await WaitForHeartBeat(cancellationToken, readMessageTask);
}
}, cancellationToken);
}
private async Task WaitForExit()
{
if (_exitConnection == null)
{
return;
}
while (true)
{
Trace.TraceInformation("Waiting for an exit message from Yams..");
string msg = await _exitConnection.ReadMessage();
if (msg == "[EXIT]")
{
Trace.TraceInformation("Exit request received from Yams");
ExitMessageReceived?.Invoke(this, EventArgs.Empty);
break;
}
Trace.TraceError($"Unexpected message received from app: {msg}, Expected [EXIT]");
}
}
