/// <summary>
/// Override OnClose() to wait the async tasks which sending message to Slack api
/// This tasks was created to support Console application.
/// In case console app terminates itself without waiting message to be sent to Slack api
/// This method will trigger by "LogManager.Shutdown();"
/// </summary>
protected override void OnClose()
{
SlackHttpClient.WaitAll();
base.OnClose();
}
//public SlackClient slackClient;
//public SlackHttpClient httpClient;
protected override void Append(log4net.Core.LoggingEvent loggingEvent)
{
var attachments = new List <Attachment>();
if (AddAttachment)
{
// Set fallback string
var theAttachment = new Attachment(string.Format("[{0}] {1} in {2} on {3}",
loggingEvent.Level.DisplayName,
loggingEvent.LoggerName,
currentProcess.ProcessName,
Environment.MachineName));
// Determine attachment color
switch (loggingEvent.Level.DisplayName.ToLowerInvariant())
{
case "warn":
theAttachment.Color = "warning";
break;
case "error":
case "fatal":
theAttachment.Color = "danger";
break;
}
//override colors from config if available
var mapping = mappings?.FirstOrDefault(m => m.level.Equals(loggingEvent.Level.DisplayName, StringComparison.InvariantCultureIgnoreCase));
if (mapping != null)
{
var color = Color.FromName(mapping.backColor);
var hex = color.IsKnownColor ? $"#{color.R:X2}{color.G:X2}{color.B:X2}" : mapping.backColor;
theAttachment.Color = !string.IsNullOrEmpty(hex) ? hex : theAttachment.Color;
}
// Add attachment fields
theAttachment.Fields = new List <Field>
{
new Field("Process", currentProcess.ProcessName, true),
new Field("Machine", Environment.MachineName, true),
new Field("Environment", ProgramEnvironment, true),
};
if (!UsernameAppendLoggerName)
{
theAttachment.Fields.Insert(0, new Field("Logger", loggingEvent.LoggerName, true));
}
// Add exception fields if exception occurred
var exception = loggingEvent.ExceptionObject;
if (exception != null)
{
theAttachment.Fields.Insert(0, new Field("Exception Type", exception.GetType().Name, true));
if (AddExceptionTraceField && !string.IsNullOrWhiteSpace(exception.StackTrace))
{
var parts = exception.StackTrace.SplitOn(1990).ToArray(); // Split call stack into consecutive fields of ~2k characters
for (int idx = parts.Length - 1; idx >= 0; idx--)
{
var name = "Exception Trace" + (idx > 0 ? $" {idx + 1}" : null);
theAttachment.Fields.Insert(0, new Field(name, "```" + parts[idx].Replace("```", "'''") + "```"));
}
}
theAttachment.Fields.Insert(0, new Field("Exception Message", exception.Message));
}
attachments.Add(theAttachment);
}
var formattedMessage = (Layout != null ? Layout.FormatString(loggingEvent) : loggingEvent.RenderedMessage);
var username = Username.Expand() + (UsernameAppendLoggerName ? " - " + loggingEvent.LoggerName : null);
SlackHttpClient.PostMessageAsync(formattedMessage,
WebhookUrl.Expand(),
username,
Channel.Expand(),
IconUrl.Expand(),
IconEmoji.Expand(),
attachments,
LinkNames);
}