A log entry representation used to propagate information from Logger to individual Handlers.

class LogRecord {
  final Level level;
  final String message;

  /** Logger where this record is stored. */
  final String loggerName;

  /** Time when this record was created. */
  final Date time;

  /** Unique sequence number greater than all log records created before it. */
  final int sequenceNumber;

  static int _nextNumber = 0;

  /** Associated exception (if any) when recording errors messages. */
  Exception exception;

  /** Associated exception message (if any) when recording errors messages. */
  String exceptionText;

  LogRecord(
      this.level, this.message, this.loggerName,
      [time, this.exception, this.exceptionText]) :
    this.time = (time == null) ? new Date.now() : time,
    this.sequenceNumber = LogRecord._nextNumber++;
}