/// <summary>
/// logs <paramref name="exception"/> to error log file.
/// </summary>
/// <param name="exception"></param>
/// <exception cref="ObjectDisposedException">
/// <seealso cref="logExceptionToConsole(string)"/>
/// </exception>
public void LogException(Exception exception)
{
string exceptionMessage = ExceptionUtils.GetExceptionMessageString(exception);
// log exception log to error log file and to console
logExceptionToErrorFile(exceptionMessage, false);
logExceptionToConsole(exceptionMessage);
}
/// <summary>
/// <para>
/// logs <paramref name="exception"/> to error log file.
/// </para>
/// <para>
/// if an exception is thrown while trying to write to log file,
/// and <paramref name="previousLogAttemptFailed"/> is false, attempt another write
/// (this time setting <paramref name="previousLogAttemptFailed"/> to true, so that in total
/// only two write attempts are made.)
/// </para>
/// </summary>
/// <param name="exception"></param>
/// <param name="previousLogAttemptFailed"></param>
private void logExceptionToErrorFile(string exceptionLog, bool previousLogAttemptFailed)
{
try
{
// construct exception log
StringBuilder stringBuilder = new StringBuilder();
if (!FileIOManager.Instance.FileExists(ERROR_LOG_FILE_PATH))
{
// write error log file header
stringBuilder.Append(ERROR_LOG_FILE_HEADER);
}
// add padding between two entries / between header and first entry
stringBuilder.Append(Environment.NewLine);
string exceptionMessageHeader = string.Format(
"[{0}]{1}",
DateTimeUtils.GetCurrentDateTimeString(),
Environment.NewLine);
stringBuilder.Append(exceptionMessageHeader);
stringBuilder.Append(exceptionLog);
stringBuilder.Append(Environment.NewLine);
// write log to error log file
FileIOManager.Instance.AppendTextToFile(ERROR_LOG_FILE_PATH, stringBuilder.ToString());
}
catch (Exception ex) // error occurred while trying to write to error log file
{
if (!previousLogAttemptFailed) // first failed attempt to write to log file
{
ErrorLogFileWriteException errorLogFileWriteException
= new ErrorLogFileWriteException(ex);
// write ErrorLogFileWriteException exception log to file
string errorLogFileWriteExceptionLog = ExceptionUtils.GetExceptionMessageString(
errorLogFileWriteException);
logExceptionToErrorFile(errorLogFileWriteExceptionLog, true);
}
}
}