DefaultLoggingListener class final

A default implementation of LoggingListener that outputs logs to the console.

DefaultLoggingListener provides a simple and human-readable logging mechanism by printing log messages to the standard output (stdout). Each log entry is timestamped, tagged, and categorized by LogLevel.

This listener is ideal for:

• Development and debugging environments
• Local testing
• Simple CLI applications

Output Format

Logs are printed in the following format:

[2025-06-18 14:22:01.534][MyService][info] Service started successfully.
[2025-06-18 14:22:05.882][Database][error] Connection failed: Timeout

Example Usage

final logger = MyCustomLogger('Database');
final listener = DefaultApplicationLogListener();

logger.add(LogLevel.error, 'Connection failed');

// Somewhere internally, the listener gets notified:
listener.onLog(LogLevel.error, DateTime.now(), 'Connection failed', 'Database');

Integration with Logging System

To use this with a custom logger or broadcasting mechanism:

final listener = DefaultApplicationLogListener();

void broadcastLog(LogLevel level, String message, String tag) {
  final now = DateTime.now();
  listener.onLog(level, now, message, tag);
  // other listeners can also be notified here
}