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feat: Add diagnostic hooks and heartbeat logging for application lifecycle events

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HueByte
2026-02-19 13:30:36 +01:00
parent caba400f43
commit 2a6dbb4461
1 changed files with 26 additions and 3 deletions
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src/EchoHub.Server/Program.cs
+26 -3
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@@ -183,9 +183,32 @@ while (true)
app.MapControllers();
app.MapHub<ChatHub>(HubConstants.ChatHubPath);
Console.Error.WriteLine("[DIAG] Calling app.RunAsync()...");
await app.RunAsync();
Console.Error.WriteLine("[DIAG] app.RunAsync() returned.");
// ── Diagnostic hooks ────────────────────────────────────────────────
app.Lifetime.ApplicationStarted.Register(
() => Console.Error.WriteLine("[DIAG] ApplicationStarted fired"));
app.Lifetime.ApplicationStopping.Register(
() => Console.Error.WriteLine("[DIAG] ApplicationStopping fired"));
app.Lifetime.ApplicationStopped.Register(
() => Console.Error.WriteLine("[DIAG] ApplicationStopped fired"));
// Heartbeat — proves the process is alive even if nothing else logs
var heartbeatCts = new CancellationTokenSource();
_ = Task.Run(async () =>
{
while (!heartbeatCts.Token.IsCancellationRequested)
{
await Task.Delay(5000, heartbeatCts.Token).ConfigureAwait(false);
Console.Error.WriteLine($"[DIAG] heartbeat {DateTimeOffset.UtcNow:HH:mm:ss}");
}
}, heartbeatCts.Token);
Console.Error.WriteLine("[DIAG] Calling app.StartAsync()...");
await app.StartAsync();
Console.Error.WriteLine("[DIAG] app.StartAsync() completed — server is running.");
await app.WaitForShutdownAsync();
Console.Error.WriteLine("[DIAG] WaitForShutdownAsync returned.");
heartbeatCts.Cancel();
// Graceful shutdown (Ctrl+C) — exit the loop
Log.Information("Server shut down gracefully");