Fix live log reads and timestamp service output

README.md

@@ -62,7 +62,9 @@ operatora:
 Szczegółowe logowanie włącza parametr `/debug` albo `/verbose` (obsługiwane są też
 warianty `--debug` i `--verbose`). Wyłącza je brak parametru lub jawny parametr
 `/nodebug` albo `/noverbose`. Błędy są zapisywane do `stderr` niezależnie od tego
-ustawienia. W usłudze Windows parametr można włączyć przez odkomentowanie elementu
+ustawienia. Każdy wiersz `stdout` i `stderr` zaczyna się znacznikiem czasu ISO 8601
+w UTC, np. `2026-09-18T12:34:56.7890000+00:00`. W usłudze Windows parametr można
+włączyć przez odkomentowanie elementu
 `<arguments>/verbose</arguments>` w `daemon-enova/smartb2bsync-enova.xml` i restart usługi.
 
 W trybie szczegółowym zapis ZO raportuje kolejne etapy: walidację żądania, logowanie

release-optima/daemon/smartb2bsync-optima.xml

@@ -52,8 +52,8 @@
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/Microsoft.VisualBasic.dll" to="%BASE%\..\Microsoft.VisualBasic.dll" failOnError="false" />
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/Microsoft.Win32.Primitives.dll" to="%BASE%\..\Microsoft.Win32.Primitives.dll" failOnError="false" />
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/Microsoft.Win32.Registry.dll" to="%BASE%\..\Microsoft.Win32.Registry.dll" failOnError="false" />
-  <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/mscordaccore.dll" to="%BASE%\..\mscordaccore.dll" failOnError="false" />
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/mscordaccore_x86_x86_8.0.3126.42015.dll" to="%BASE%\..\mscordaccore_x86_x86_8.0.3126.42015.dll" failOnError="false" />
+  <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/mscordaccore.dll" to="%BASE%\..\mscordaccore.dll" failOnError="false" />
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/mscordbi.dll" to="%BASE%\..\mscordbi.dll" failOnError="false" />
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/mscorlib.dll" to="%BASE%\..\mscorlib.dll" failOnError="false" />
   <download from="https://demo.smartb2b.eu/files/smartb2b-sync-optima/mscorrc.dll" to="%BASE%\..\mscorrc.dll" failOnError="false" />

src/SmartB2B.Enova.Service/Program.cs

@@ -11,6 +11,7 @@ internal static class Program
 {
     public static async Task<int> Main(string[] args)
     {
+        ConsoleLogger.InstallTimestampedOutput();
         IDisposable? sentry = null;
         IErpOrderAdapter? adapter = null;
         var cancellation = new CancellationTokenSource();

src/SmartB2B.Optima.Service/Program.cs

@@ -11,6 +11,7 @@ internal static class Program
 {
     public static async Task<int> Main(string[] args)
     {
+        ConsoleLogger.InstallTimestampedOutput();
         IDisposable? sentry = null;
         IErpOrderAdapter? adapter = null;
         var cancellation = new CancellationTokenSource();

src/SmartB2B.Sync.Service/Diagnostics/ConsoleLogger.cs

@@ -4,6 +4,12 @@ public static class ConsoleLogger
 {
     public static bool VerboseEnabled { get; private set; }
 
+    public static void InstallTimestampedOutput()
+    {
+        Console.SetOut(new TimestampedTextWriter(Console.Out));
+        Console.SetError(new TimestampedTextWriter(Console.Error));
+    }
+
     public static void Configure(bool verboseEnabled) => VerboseEnabled = verboseEnabled;
 
     public static void Verbose(string message)

src/SmartB2B.Sync.Service/Diagnostics/DiagnosticsHandler.cs

@@ -88,9 +88,16 @@ public sealed partial class DiagnosticsHandler
 
         var compactDate = date.Replace("-", string.Empty, StringComparison.Ordinal);
         var path = Path.Combine(_logDirectory, $"{_logPrefix}_{compactDate}.{stream}.log");
-        return File.Exists(path)
+        if (!File.Exists(path))
-            ? await File.ReadAllTextAsync(path, cancellationToken).ConfigureAwait(false)
+        {
-            : null;
+            return null;
+        }
+
+        await using var log = new FileStream(
+            path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete,
+            bufferSize: 4096, useAsync: true);
+        using var reader = new StreamReader(log);
+        return await reader.ReadToEndAsync(cancellationToken).ConfigureAwait(false);
     }
 
     [GeneratedRegex("^\\d{4}-\\d{2}-\\d{2}$", RegexOptions.CultureInvariant)]

src/SmartB2B.Sync.Service/Diagnostics/TimestampedTextWriter.cs

@@ -0,0 +1,93 @@
+using System.Globalization;
+using System.Text;
+
+namespace SmartB2B.Sync.Service.Diagnostics;
+
+internal sealed class TimestampedTextWriter : TextWriter
+{
+    private readonly TextWriter _inner;
+    private readonly object _sync = new();
+    private bool _atLineStart = true;
+
+    public TimestampedTextWriter(TextWriter inner) => _inner = inner;
+
+    public override Encoding Encoding => _inner.Encoding;
+
+    public override void Write(char value)
+    {
+        lock (_sync)
+        {
+            WriteCore(value.ToString().AsSpan());
+        }
+    }
+
+    public override void Write(string? value)
+    {
+        if (value is null) return;
+        lock (_sync)
+        {
+            WriteCore(value.AsSpan());
+        }
+    }
+
+    public override void Write(char[] buffer, int index, int count)
+    {
+        ArgumentNullException.ThrowIfNull(buffer);
+        lock (_sync)
+        {
+            WriteCore(buffer.AsSpan(index, count));
+        }
+    }
+
+    public override void Write(ReadOnlySpan<char> buffer)
+    {
+        lock (_sync)
+        {
+            WriteCore(buffer);
+        }
+    }
+
+    public override void WriteLine(string? value)
+    {
+        lock (_sync)
+        {
+            if (value is not null) WriteCore(value.AsSpan());
+            WriteCore(NewLine.AsSpan());
+        }
+    }
+
+    public override void WriteLine()
+    {
+        lock (_sync)
+        {
+            WriteCore(NewLine.AsSpan());
+        }
+    }
+
+    public override void Flush()
+    {
+        lock (_sync)
+        {
+            _inner.Flush();
+        }
+    }
+
+    private void WriteCore(ReadOnlySpan<char> text)
+    {
+        while (!text.IsEmpty)
+        {
+            if (_atLineStart)
+            {
+                _inner.Write(DateTimeOffset.UtcNow.ToString("O", CultureInfo.InvariantCulture));
+                _inner.Write(' ');
+                _atLineStart = false;
+            }
+
+            var newline = text.IndexOf('\n');
+            var length = newline >= 0 ? newline + 1 : text.Length;
+            _inner.Write(text[..length]);
+            _atLineStart = newline >= 0;
+            text = text[length..];
+        }
+    }
+}

tests/SmartB2B.Optima.Tests/Program.cs

@@ -1,7 +1,9 @@
 using System.Collections.Concurrent;
+using System.Globalization;
 using Newtonsoft.Json.Linq;
 using SmartB2B.Optima.Adapter;
 using SmartB2B.Sync.Contracts;
+using SmartB2B.Sync.Service.Diagnostics;
 using SmartB2B.Sync.Service.Orders;
 using SmartB2B.Sync.Service.Rpc;
 using WampSharp.V2.Core.Contracts;
@@ -26,7 +28,9 @@ var tests = new (string Name, Func<Task> Run)[]
     ("Wynik Optimy zachowuje kwargs WAMP", HandlerReturnsKeywordResult),
     ("Operacje zamówień są serializowane", ConcurrentOrdersAreSerialized),
     ("Fasada COM działa na jednym wątku STA", FacadeRunsOnSingleStaThread),
-    ("Adapter serializuje bezpośrednie wywołania COM", AdapterSerializesComCalls)
+    ("Adapter serializuje bezpośrednie wywołania COM", AdapterSerializesComCalls),
+    ("Diagnostyka czyta log podczas zapisu", DiagnosticsReadsOpenLogs),
+    ("Każdy wiersz logu ma czas ISO", ConsoleOutputHasIsoTimestamps)
 };
 
 var failures = 0;
@@ -111,6 +115,84 @@ static async Task HandlerMapsOptimaContract()
     AssertEqual(123m, request.Items[0].UnitPriceGross, "brutto");
 }
 
+static async Task DiagnosticsReadsOpenLogs()
+{
+    var directory = Path.Combine(Path.GetTempPath(), $"smartb2b-log-test-{Guid.NewGuid():N}");
+    Directory.CreateDirectory(directory);
+    try
+    {
+        var diagnostics = new DiagnosticsHandler("test", "1", ".NET", "test", null, directory, "service");
+        var invocation = new RpcInvocation([], new Dictionary<string, object?> { ["date"] = "2026-09-18" });
+
+        foreach (var stream in new[] { "out", "err" })
+        {
+            var path = Path.Combine(directory, $"service_20260918.{stream}.log");
+            await using var writer = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
+            var content = $"Log {stream} zażółć";
+            var bytes = System.Text.Encoding.UTF8.GetBytes(content);
+            await writer.WriteAsync(bytes);
+            await writer.FlushAsync();
+
+            var result = stream == "out"
+                ? await diagnostics.GetLogAsync(invocation, CancellationToken.None)
+                : await diagnostics.GetErrorLogAsync(invocation, CancellationToken.None);
+            AssertEqual(content, result, $"odczyt otwartego pliku {stream}");
+        }
+    }
+    finally
+    {
+        Directory.Delete(directory, recursive: true);
+    }
+}
+
+static Task ConsoleOutputHasIsoTimestamps()
+{
+    var originalOut = Console.Out;
+    var originalError = Console.Error;
+    using var output = new StringWriter();
+    using var error = new StringWriter();
+    try
+    {
+        Console.SetOut(output);
+        Console.SetError(error);
+        ConsoleLogger.InstallTimestampedOutput();
+
+        Console.Write("pierw");
+        Console.WriteLine("szy\ndrugi");
+        ConsoleLogger.Error("błąd\nszczegóły");
+
+        AssertTimestampedLines(output.ToString(), ["pierwszy", "drugi"]);
+        AssertTimestampedLines(error.ToString(), ["błąd", "szczegóły"]);
+    }
+    finally
+    {
+        Console.SetOut(originalOut);
+        Console.SetError(originalError);
+    }
+
+    return Task.CompletedTask;
+}
+
+static void AssertTimestampedLines(string output, string[] expectedMessages)
+{
+    var lines = output.Split('\n', StringSplitOptions.RemoveEmptyEntries);
+    AssertEqual(expectedMessages.Length, lines.Length, "liczba wierszy logu");
+    for (var index = 0; index < lines.Length; index++)
+    {
+        var line = lines[index].TrimEnd('\r');
+        var separator = line.IndexOf(' ');
+        if (separator < 0 ||
+            !DateTimeOffset.TryParseExact(line[..separator], "O", CultureInfo.InvariantCulture,
+                DateTimeStyles.None, out var timestamp) ||
+            timestamp.Offset != TimeSpan.Zero)
+        {
+            throw new InvalidOperationException($"Brak czasu ISO UTC w wierszu: {line}");
+        }
+
+        AssertEqual(expectedMessages[index], line[(separator + 1)..], "treść wiersza logu");
+    }
+}
+
 static async Task HandlerMapsOptionalExtraFields()
 {
     using var adapter = new CapturingAdapter();