/// <summary>
/// Logs ERROR level messages to CloudWatch
/// </summary>
/// <param name="context">The ILambdaContext</param>
/// <param name="message">The message to log</param>
/// <param name="ex">The exception that will be flattened into json and appended to the message</param>
/// <returns>The ILambdaContext that was used to log the message</returns>
public static ILambdaContext LogError(this ILambdaContext context, string message, Exception ex = null)
{
if (String.IsNullOrEmpty(message) && ex == null)
{
throw new ArgumentException("Both the message and exception cannot be null.");
}
if (!String.IsNullOrEmpty(message) && ex != null)
{
string Message = String.Empty;
try
{
Message = JsonConvert.SerializeObject(
new
{
Message = message,
Exception = ex
}
);
}
catch (Exception)
{
Message = JsonConvert.SerializeObject(
new
{
Message = message,
Exception = new
{
ClassName = ex.GetType().FullName,
Message = ex.Message,
InnerException = (ex.InnerException == null) ? "" : ex.InnerException.Message,
StackTrackString = ex.StackTrace
}
}
);
}
return(context.LogMessage(Message, LogLevel.ERROR));
}
else if (!String.IsNullOrEmpty(message))
{
return(context.LogMessage(message, LogLevel.ERROR));
}
else
{
try
{
return(context.LogMessage(JsonConvert.SerializeObject(ex), LogLevel.ERROR));
}
// This can occur in dotnetcore1.0 using Json.NET 10.0.1
// when trying to serialize a TaskCanceledException, it will
// throw a JsonSerializationException that there was an error
// getting the value of Result on System.Threading.Tasks.Task`1[TYPE]
catch (Exception)
{
string Message = JsonConvert.SerializeObject(
new
{
ClassName = ex.GetType().FullName,
Message = ex.Message,
InnerException = (ex.InnerException == null) ? "" : ex.InnerException.Message,
StackTrackString = ex.StackTrace
}
);
return(context.LogMessage(Message, LogLevel.ERROR));
}
}
}
/// <summary>
/// Logs DEBUG level messages to CloudWatch
/// </summary>
/// <param name="context">The ILambdaContext</param>
/// <param name="message">The message to log</param>
/// <returns>The ILambdaContext that was used to log the message</returns>
public static ILambdaContext LogDebug(this ILambdaContext context, string message)
{
return(context.LogMessage(message, LogLevel.DEBUG));
}
/// <summary>
/// Logs WARNING level messages to CloudWatch
/// </summary>
/// <param name="context">The ILambdaContext</param>
/// <param name="message">The message to log</param>
/// <returns>The ILambdaContext that was used to log the message</returns>
public static ILambdaContext LogWarning(this ILambdaContext context, string message)
{
return(context.LogMessage(message, LogLevel.WARNING));
}
/// <summary>
/// Logs INFO level messages to CloudWatch
/// </summary>
/// <param name="context">The ILambdaContext</param>
/// <param name="message">The message to log</param>
/// <returns>The ILambdaContext that was used to log the message</returns>
public static ILambdaContext LogInfo(this ILambdaContext context, string message)
{
return(context.LogMessage(message, LogLevel.INFO));
}