Strategic Logger #

 __ ______  __ ______  __ ___  __        __  __  __ ___ ___
[__  | |__/|__| | |__ | _  |  |    |   |  || _ | _ |__ |__/
___] | |  \|  | | |___|__]_|_ |__  |___|__||__]|__]|___|  \

  Strategic Logger powered by Hypn Tech (hypn.com.br)

Why Strategic Logger? #

One Call, All Strategies #

Log once and send to multiple destinations simultaneously - Console, Firebase, Sentry, Datadog, New Relic.

Zero Configuration Required (v3.0.0) #

• Auto-initialization - Works out of the box, no setup needed
• Synchronous API - No await required, just call logger.info('msg')
• Fire-and-forget - Logging never blocks your app

Performance First #

• Isolate-based processing - Never block the main thread
• Async queue with backpressure - Handle high log volumes efficiently
• Batch processing - Automatic batching for network strategies
• Smart retry logic - Exponential backoff for failed operations

Beautiful Console Output #

• Auto-detect terminal capabilities - iOS/Android safe, no ANSI garbage
• Modern formatting with colors and structured layout
• Rich context display with metadata and stack traces
• Dynamic project banners - Your app name in ASCII art

Enterprise-Ready Integrations #

• Firebase Analytics & Crashlytics - Complete Firebase suite support
• Sentry - Full error tracking integration
• Datadog - APM and log management
• New Relic - Application monitoring
• Custom strategies - Extend with your own logging destinations

Quick Start #

Installation #

Add Strategic Logger to your pubspec.yaml:

dependencies:
  strategic_logger: ^3.0.0

Then run:

flutter pub get

Zero-Config Usage (NEW in v3.0.0) #

import 'package:strategic_logger/logger.dart';

void main() {
  // Just use it! No initialization needed.
  // Auto-initializes with ConsoleLogStrategy at debug level.
  logger.info('App started');
  logger.debug('Debug details', context: {'version': '3.0.0'});
  logger.error('Something failed', stackTrace: StackTrace.current);
}

Full Configuration (Recommended for Production) #

import 'package:strategic_logger/logger.dart';

void main() async {
  // Initialize with your preferred strategies
  await logger.initialize(
    projectName: 'My App',  // Your project name appears in the banner!
    level: LogLevel.info,
    strategies: [
      ConsoleLogStrategy(
        useModernFormatting: true,
        useColors: true,
      ),
      FirebaseAnalyticsLogStrategy(),
      FirebaseCrashlyticsLogStrategy(),
      DatadogLogStrategy(
        apiKey: 'your-datadog-api-key',
        service: 'my-app',
        env: 'production',
      ),
    ],
    enablePerformanceMonitoring: true,
  );

  // All logging methods are synchronous - no await needed!
  logger.info('App started successfully');
  logger.error('Something went wrong', stackTrace: StackTrace.current);
}

When initialized with a projectName, you'll see a beautiful colored banner with your app name in ASCII art. Without a projectName, it defaults to "STRATEGIC LOGGER".

Features #

Logging Strategies #

• ConsoleLogStrategy - Beautiful console output with ANSI color auto-detection
• FirebaseAnalyticsLogStrategy - Track events in Firebase Analytics
• FirebaseCrashlyticsLogStrategy - Report crashes and errors to Firebase Crashlytics
• SentryLogStrategy - Full Sentry integration for error tracking
• DatadogLogStrategy - APM and log management with HTTP batching
• NewRelicLogStrategy - Application monitoring with retry logic
• Custom Strategies - Extend LogStrategy for your own destinations

Core Features #

• Auto-initialization - Works out of the box with ConsoleLogStrategy
• Synchronous API - All logging methods return void, no await needed
• Log Levels - Debug, Info, Warning, Error, Fatal with intelligent routing
• Structured Logging - Rich metadata and context support
• Event System - Custom log events with parameters
• Context Propagation - Automatic context merging from entries and events
• Strategy Filtering - Filter logs by level and event type per strategy

Performance Features #

• Isolate Processing - Heavy operations run in background isolates
• Performance Monitoring - Built-in metrics and performance tracking
• Async Queue - Efficient log processing with backpressure control (1000 entry buffer)
• Batch Processing - Automatic batching for HTTP strategies (100 entries or 5s timeout)
• Retry Logic - Exponential backoff for failed network operations (3 retries max)

Developer Experience #

• Modern Console - Beautiful, colorful output with automatic terminal detection
• Dynamic Banners - Your project name displayed in ASCII art
• Type Safety - Full type safety in Dart with comprehensive documentation
• Hot Reload - Seamless development experience with Flutter
• Platform Support - Android, iOS, Linux, macOS, Web, Windows

Strategy Configuration #

ConsoleLogStrategy - Beautiful Terminal Output #

await logger.initialize(
  strategies: [
    ConsoleLogStrategy(
      logLevel: LogLevel.debug,
      useModernFormatting: true,  // Rich formatting with colors
      useColors: true,            // Enable ANSI colors
      autoDetectColors: true,     // Auto-detect terminal capabilities (iOS/Android safe)
      showTimestamp: true,        // Show timestamps
      showContext: true,          // Show context data
    ),
  ],
);

Auto-detection ensures:

• No ANSI garbage on iOS Simulator/Android Logcat
• Beautiful colors on macOS/Linux terminals
• Windows Terminal support (WT_SESSION, TERM, COLORTERM detection)

Firebase Strategies - Analytics & Crashlytics #

await logger.initialize(
  strategies: [
    FirebaseAnalyticsLogStrategy(
      logLevel: LogLevel.info,
    ),
    FirebaseCrashlyticsLogStrategy(
      logLevel: LogLevel.error,  // Only errors and fatals
    ),
  ],
);

// Logs automatically tracked in Firebase
logger.info('User logged in', context: {'userId': '123'});
logger.error('Payment failed', stackTrace: StackTrace.current);

Sentry - Error Tracking #

await logger.initialize(
  strategies: [
    SentryLogStrategy(
      logLevel: LogLevel.error,  // Only log errors to Sentry
    ),
  ],
);

// Errors sent to Sentry with full context
logger.error(
  'API request failed',
  context: {'endpoint': '/api/users', 'statusCode': 500},
  stackTrace: StackTrace.current,
);

Datadog - APM & Log Management #

await logger.initialize(
  strategies: [
    DatadogLogStrategy(
      apiKey: 'your-datadog-api-key',
      service: 'my-app',
      env: 'production',
      batchSize: 100,          // Batch 100 entries
      batchTimeout: Duration(seconds: 5),  // Or send after 5 seconds
      maxRetries: 3,           // Retry failed batches 3 times
    ),
  ],
);

Features:

• Automatic batching (100 entries or 5 seconds)
• Exponential backoff retry logic
• HTTP client with proper error handling

New Relic - Application Monitoring #

await logger.initialize(
  strategies: [
    NewRelicLogStrategy(
      licenseKey: 'your-newrelic-license',
      appName: 'my-app',
      batchSize: 50,
      batchTimeout: Duration(seconds: 10),
    ),
  ],
);

Usage Examples #

Basic Logging #

import 'package:strategic_logger/logger.dart';

void main() {
  // Works immediately - auto-initializes on first call!
  logger.debug('Debug message');
  logger.info('Info message');
  logger.warning('Warning message');
  logger.error('Error message');
  logger.fatal('Fatal error');
}

Structured Logging with Context #

// Rich context logging - context is passed to ALL strategies
logger.info('User action', context: {
  'userId': '123',
  'action': 'login',
  'timestamp': DateTime.now().toIso8601String(),
  'device': 'iPhone 15',
  'version': '1.2.3',
});

// Context is available in Datadog for indexing and filtering
// Context is added as Sentry extra fields
// Context is merged into Firebase Analytics parameters
// Context is displayed in console output

// Error with stack trace and context
try {
  throw Exception('Something went wrong');
} catch (e, stackTrace) {
  logger.error(
    'Operation failed',
    stackTrace: stackTrace,
    context: {
      'operation': 'data_sync',
      'retryCount': 3,
      'lastError': e.toString(),
    },
  );
}

Multi-Strategy Logging #

// Log to multiple destinations simultaneously
await logger.initialize(
  strategies: [
    ConsoleLogStrategy(useModernFormatting: true),
    SentryLogStrategy(),
    FirebaseCrashlyticsLogStrategy(),
    FirebaseAnalyticsLogStrategy(),
    DatadogLogStrategy(
      apiKey: 'your-datadog-api-key',
      service: 'my-app',
      env: 'production',
    ),
    NewRelicLogStrategy(
      licenseKey: 'your-newrelic-license',
      appName: 'my-app',
    ),
  ],
);

// One call, multiple destinations
logger.error('Critical system failure', context: {
  'component': 'payment_service',
  'severity': 'critical',
});
// This error will be logged to:
// - Console (with beautiful formatting)
// - Sentry (error tracking)
// - Firebase Crashlytics (crash reporting)
// - Firebase Analytics (event tracking)
// - Datadog (APM)
// - New Relic (monitoring)

Real-time Log Streaming #

// Listen to real-time log events
logger.logStream.listen((logEntry) {
  print('New log: ${logEntry.level} - ${logEntry.message}');

  // Update UI, send to external systems, etc.
  updateDashboard(logEntry);
});

// Logs will automatically appear in the stream
logger.info('User performed action');

Flutter App Integration #

import 'package:flutter/material.dart';
import 'package:strategic_logger/logger.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await logger.initialize(
    projectName: 'My App',
    strategies: [
      ConsoleLogStrategy(useModernFormatting: true),
      FirebaseCrashlyticsLogStrategy(),
    ],
    enablePerformanceMonitoring: true,
  );

  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: ElevatedButton(
            onPressed: () {
              logger.info('Button pressed', context: {
                'screen': 'home',
                'timestamp': DateTime.now().toIso8601String(),
              });
            },
            child: const Text('Log Action'),
          ),
        ),
      ),
    );
  }
}

Strategy-Specific Events #

// Send a generic event to all strategies
logger.log(
  'purchase completed',
  event: LogEvent(
    eventName: 'PURCHASE_COMPLETED',
    parameters: {'amount': '99.99', 'currency': 'USD'},
  ),
);

// Send to a specific strategy using specialized events
logger.log(
  'purchase completed',
  event: FirebaseAnalyticsLogEvent(
    eventName: 'PURCHASE_COMPLETED',
    parameters: {'amount': '99.99'},
  ),
);

logger.error(
  'non-fatal error',
  event: FirebaseCrashlyticsLogEvent(
    eventName: 'ERROR',
    parameters: {'component': 'checkout'},
  ),
);

Modern Console Output #

Experience beautiful, structured console output:

14:30:25.123 DEBUG  User action completed
 Event: USER_ACTION
   Message: User completed purchase
   Parameters:
     userId: 123
     amount: 99.99
 Context:
   timestamp: 2024-01-15T14:30:25.123Z
   source: mobile_app

Custom Strategies #

Create custom strategies by extending LogStrategy:

import 'package:strategic_logger/logger.dart';
import 'package:strategic_logger/src/core/log_queue.dart';

class MyCustomLogStrategy extends LogStrategy {
  @override
  Future<void> log(LogEntry entry) async => _processEntry(entry);

  @override
  Future<void> info(LogEntry entry) async => _processEntry(entry);

  @override
  Future<void> error(LogEntry entry) async => _processEntry(entry);

  @override
  Future<void> fatal(LogEntry entry) async => _processEntry(entry);

  Future<void> _processEntry(LogEntry entry) async {
    if (!shouldLog(event: entry.event)) return;

    // Merge context from entry and event parameters
    final context = <String, dynamic>{};
    if (entry.context != null) context.addAll(entry.context!);
    if (entry.event?.parameters != null) {
      context.addAll(entry.event!.parameters!);
    }

    // Your implementation here
    await _sendToService({
      'message': entry.message.toString(),
      'level': entry.level.name,
      'timestamp': entry.timestamp.toIso8601String(),
      'context': context,
    });
  }
}

The LogEntry object contains:

• message - The log message
• level - The log level (debug, info, warning, error, fatal)
• timestamp - When the log was created
• context - Structured context map (Map<String, dynamic>?)
• stackTrace - Stack trace for errors (StackTrace?)
• event - Optional LogEvent object

Performance #

Strategic Logger is designed for high performance:

• Isolate-based processing prevents blocking the main thread
• Automatic batching reduces network overhead
• Async queue with backpressure handles high log volumes
• Performance monitoring tracks operation metrics
• Synchronous fire-and-forget API - logging calls return immediately

Performance Metrics #

final stats = logger.getPerformanceStats();
print('Total operations: ${stats['processLogEntry']?.totalOperations}');
print('Average duration: ${stats['processLogEntry']?.averageDuration}ms');
print('Error rate: ${stats['processLogEntry']?.errorRate}%');

Migration Guide #

From v2.x to v3.0.0 #

v3.0.0 is a major release with breaking changes that simplify the API:

1. Remove await from logging calls

// v2.x (old)
await logger.info('message');
await logger.error('error', stackTrace: StackTrace.current);

// v3.0.0 (new) - all logging methods are now void
logger.info('message');
logger.error('error', stackTrace: StackTrace.current);

Note: In Dart, calling await on a void expression is a compilation error. You must remove await from all logging calls.

2. Auto-initialization (optional)

// v2.x (old) - required initialization, crashed with NotInitializedError otherwise
await logger.initialize(strategies: [ConsoleLogStrategy()]);
logger.info('message');

// v3.0.0 (new) - works immediately, auto-initializes with ConsoleLogStrategy
logger.info('message');  // Just works!

// Explicit initialization is still recommended for production
await logger.initialize(strategies: [ConsoleLogStrategy(), SentryLogStrategy()]);

3. Removed APIs

The following have been removed in v3.0.0:

Supported Platforms #

• Flutter (iOS, Android, Web, Desktop)
• Dart CLI applications
• Dart VM applications
• Flutter Web
• Flutter Desktop (Windows, macOS, Linux)

Contributing #

We welcome contributions! Please see our Code of Conduct for community guidelines.

Development Setup #

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Support #

If you find Strategic Logger helpful, please consider:

• Starring the repository
• Reporting bugs
• Suggesting new features
• Contributing code

Sponsored by #

License #

Strategic Logger is released under the MIT License. See LICENSE for details.

Documentation & Resources #

• API Documentation - Complete API reference
• Examples - Ready-to-use code examples
• Changelog - Version history and updates
• Code of Conduct - Community guidelines
• GitHub Issues - Report bugs and request features
• GitHub Repository - Source code and contributions