/// <summary>
/// Main method in the ILogger interface that defines how to print a message.
/// </summary>
/// <param name="logLevel">Log severity</param>
/// <param name="eventId">Event category (no used in this project)</param>
/// <param name="state">Actual message wrapped</param>
/// <param name="exception">Associated exception</param>
/// <param name="formatter">Function that defines how to format a message.</param>
public void Log <TState>(
LogLevel logLevel,
EventId eventId,
TState state,
Exception exception,
Func <TState, Exception, string> formatter
)
{
/// <summary>
/// Return immediately is logging is not enabled for this log level
/// </summary>
if (!IsEnabled(logLevel))
{
return;
}
// Exception has to be set (by framework)
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
// Generate actual message
var message = formatter(state, exception);
// Return for empty message
if (string.IsNullOrEmpty(message))
{
return;
}
if (logLevel >= LogLevel.Error)
{
_loggingService.RecordLogMessageAsync(
message,
exception != null ?
JsonConvert.SerializeObject(new
{
Exception = exception.ToString()
}) :
"",
"status-site",
eventId.Id,
logLevel.GetSeverity()
);
}
// Define colors for thread identifiers
var threadColors = new ConsoleColor[] {
ConsoleColor.Cyan,
ConsoleColor.DarkCyan,
ConsoleColor.Blue,
ConsoleColor.DarkBlue,
ConsoleColor.DarkGreen,
ConsoleColor.DarkMagenta,
ConsoleColor.DarkYellow,
ConsoleColor.DarkRed
};
// Generate thread label text
var thread = Thread.CurrentThread;
var threadLabel =
string.IsNullOrEmpty(thread.Name) ?
$"ThreadID: {thread.ManagedThreadId.ToString().PadLeft(3)}" :
thread.Name.Substring(0, 12);
// Generate a thread label color
var threadColor = threadColors[Math.Abs(threadLabel.GetHashCode()) % threadColors.Length];
var label = logLevel.GetLabel();
// Do not let multiple threads enter the actual print section
lock (StatusLogger._lockKey)
{
// Print everything (watch for pads and new lines)
ColoredConsole.Write($"{threadLabel}", threadColor);
Console.Write("".PadLeft(6 - label.Text.Length));
ColoredConsole.Write($"{label.Text}", label.ForegroundColor, label.BackgroundColor);
Console.Write(" | ");
Console.Write($"[{eventId.ToString().PadRight(2)}] {_categoryName}");
Console.WriteLine();
Console.Write($"[{DateTime.UtcNow.ToString("MM/dd/yy HH:mm:ss")}]");
Console.Write(" | ");
if (exception != null)
{
message += Environment.NewLine + Environment.NewLine + exception.ToString();
}
if (message.Contains(Environment.NewLine))
{
message =
"See multiline message:" +
Environment.NewLine + "\t" +
message.Replace(Environment.NewLine, $"{Environment.NewLine}\t");
}
Console.WriteLine(message);
Console.WriteLine();
}
}