Introduction to Joi-Logger

Joi-Logger is a powerful and flexible logging utility for Node.js applications, enabling developers to record log messages with ease. Each log level (info, warn, error, debug) provides developers with the necessary tools to keep track of application events and debug issues effectively.

Installation

  npm install joi-logger

Basic Usage

Here is a quick example of how to set up and use Joi-Logger in your Node.js application:

  
    const JoiLogger = require('joi-logger');
    const logger = new JoiLogger();

    logger.info('This is an info message');
    logger.warn('This is a warning');
    logger.error('This is an error message');
    logger.debug('Debugging information here');
  

Advanced Usage

Joi-Logger also provides more advanced features for customized logging:

Setting Log Levels

  
    const logger = new JoiLogger({ level: 'debug' });

    logger.debug('This debug message will be shown');
    logger.info('This info message will be shown');
  

Customizing Log Output

  
    const logger = new JoiLogger({ 
      format: '{timestamp} {level}: {message}', 
      dateFormat: 'YYYY-MM-DD HH:mm:ss' 
    });

    logger.info('This info message has custom formatting');
  

Writing Logs to a File

  
    const logger = new JoiLogger({ 
      filePath: './logs/app.log' 
    });

    logger.info('This message will be saved to a file');
  

Asynchronous Logging

  
    async function logAsync() {
      await logger.asyncInfo('Logging this message asynchronously');
    }

    logAsync();
  

App Example with Joi-Logger

  
    const express = require('express');
    const JoiLogger = require('joi-logger');
    const app = express();
    const logger = new JoiLogger({ level: 'debug', filePath: './logs/app.log' });

    app.use((req, res, next) => {
      logger.info(`${req.method} ${req.url}`);
      next();
    });

    app.get('/', (req, res) => {
      logger.debug('Handling request to /');
      res.send('Hello, world!');
    });

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

By utilizing the advanced functionalities of Joi-Logger, developers can ensure comprehensive logging and debugging for their applications.

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