Ultimate Guide to Using All-in-One Logger for Effective Application Logging

Welcome to the ultimate guide on using the All-in-One Logger for your application. This powerful logging utility provides a wide array of APIs to meet your logging needs, from basic logging to more advanced features. Let’s dive into the capabilities of this logger with code snippets and a comprehensive app example.

Logger Initialization

First, you need to initialize the logger:

  const logger = new AllInOneLogger({
    level: 'info',
    format: 'json',
    transports: [
      new ConsoleTransport(),
      new FileTransport({ filename: 'app.log' })
    ]
  });

Basic Logging

Basic logging includes logging messages at different levels:

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

Contextual Logging

Logging with context for better traceability:

  const requestId = '12345';
  logger.info('User logged in', { requestId, userId: '67890' });

Conditional Logging

Log messages only when a condition is met:

  if (process.env.NODE_ENV !== 'production') {
    logger.debug('Debugging information');
  }

Performance Monitoring

Logging execution time for performance monitoring:

  console.time('query');
  // Perform some query
  console.timeEnd('query');

Error Handling

Advanced error logging with stack traces:

  try {
    // some code
  } catch (error) {
    logger.error('An error occurred', { error });
  }

App Example

Here’s an example app integrating some of the logging features:

  const express = require('express');
  const app = express();
  const logger = new AllInOneLogger({
    level: 'debug',
    format: 'json',
    transports: [
      new ConsoleTransport(),
      new FileTransport({ filename: 'app.log' })
    ]
  });

  app.use((req, res, next) => {
    logger.info('Request received', { method: req.method, url: req.url });
    next();
  });

  app.get('/', (req, res) => {
    logger.debug('Home route accessed');
    res.send('Hello, World!');
  });

  app.use((err, req, res, next) => {
    logger.error('Server Error', { error: err });
    res.status(500).send('Internal Server Error');
  });

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

By using the All-in-One Logger, you can easily keep track of your application behavior, monitor performance, and handle errors efficiently. Happy logging!

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