Introducing Magnus Logger

Magnus Logger is a powerful and versatile logging library designed to provide developers with an easy-to-use tool for managing and analyzing logs in their applications. With dozens of useful API methods, Magnus Logger can cater to various logging needs, ensuring that capturing, categorizing, and retrieving log information becomes a seamless process.

Getting Started

To start using Magnus Logger, you need to install it via your package manager. For example:

  
    npm install magnus-logger
  

Basic Configuration

Here’s how you can set up Magnus Logger with basic configuration:

  
    const logger = require('magnus-logger');

    // Setting up the basic configuration
    const config = {
      level: 'info',
      format: 'json',
      transports: ['console', 'file'],
      fileOptions: {
        filename: 'app.log'
      }
    };

    logger.configure(config);
  

API Methods

1. Logging Messages

Capture different levels of log messages using:

  
    logger.info('This is an info message');
    logger.warn('This is a warning message');
    logger.error('This is an error message');
  

2. Dynamic Log Levels

  
    logger.setLevel('debug');
    logger.debug('This is a debug message');
  

3. Custom Formats

Create custom formats to structure log output:

  
    logger.setFormat((info) => {
       return `${info.timestamp} ${info.level.toUpperCase()}: ${info.message}`;
    });
  

4. Tagged Logging

Attaching tags to logs:

  
    logger.info('User logged in', { tags: ['auth', 'user'] });
  

5. Conditional Logging

  
    logger.info('This log will appear only if condition is true', { condition: true });
  

6. Log Rotation

  
    const rotatingConfig = {
      level: 'info',
      format: 'json',
      transports: ['rotatingFile'],
      fileOptions: {
        filename: 'app.log',
        maxFiles: 5,
        maxSize: '10m'
      }
    };
    logger.configure(rotatingConfig);
  

App Example

Below is an example of a simple application utilizing Magnus Logger:

  
    const express = require('express');
    const bodyParser = require('body-parser');
    const logger = require('magnus-logger');

    // Configure the logger
    const config = {
      level: 'info',
      format: 'json',
      transports: ['console', 'file'],
      fileOptions: {
        filename: 'app.log'
      }
    };

    logger.configure(config);

    const app = express();
    app.use(bodyParser.json());

    // Middleware to log all incoming requests
    app.use((req, res, next) => {
      logger.info(`Incoming request on ${req.path}`);
      next();
    });

    // Sample route
    app.get('/', (req, res) => {
      logger.info('Handling GET request for root route');
      res.send('Hello, world!');
    });

    // Start the server
    app.listen(3000, () => {
      logger.info('Server started on port 3000');
    });
  

By integrating Magnus Logger into your applications, you can drastically improve logging efficiency, gain better insights, and enhance the debugging process.

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