Introducing `errorback-logger`: The Ultimate Tool for Error Logging

Welcome to our comprehensive guide on `errorback-logger`, a powerful and flexible library designed to simplify error logging in your applications. Whether you are developing a small project or a large-scale application, this library provides efficient methods to handle and log errors effectively.

Key Features of `errorback-logger`

• Error logging with various levels (debug, info, warn, error)
• Custom error handlers
• Integration with external logging services
• Easy configuration and setup

Getting Started with `errorback-logger`

First, let’s install the `errorback-logger` package:

npm install errorback-logger

Basic Usage

Here’s how you can quickly set up error logging in your application:

const { createLogger, transports, format } = require('errorback-logger');

const logger = createLogger({
  level: 'info',
  format: format.json(),
  transports: [
    new transports.Console(),
    new transports.File({ filename: 'error.log', level: 'error' })
  ]
});

logger.info('Application started successfully!');
logger.warn('This is a warning message.');
logger.error('An error occurred!');

Custom Error Handlers

You can create custom error handlers to handle error logging as per your requirements:

const { createLogger, transports, format } = require('errorback-logger');

const customErrorHandler = (error) => {
  // Custom logic to handle errors
  console.error('Custom Error:', error.message);
};

const logger = createLogger({
  level: 'debug',
  format: format.combine(
    format.timestamp(),
    format.json()
  ),
  transports: [
    new transports.Console(),
    new transports.File({ filename: 'app.log' })
  ],
  exceptionHandlers: [
    new transports.File({ filename: 'exceptions.log' })
  ]
});

logger.on('error', customErrorHandler);

Integration with External Logging Services

`errorback-logger` can be easily integrated with external logging services like Loggly or Datadog:

const { createLogger, transports } = require('errorback-logger');
const Loggly = require('winston-loggly-bulk');

const logger = createLogger({
  transports: [
    new transports.Console(),
    new Loggly({
      token: 'your-loggly-token',
      subdomain: 'your-subdomain',
      tags: ['Winston-NodeJS'],
      json: true
    })
  ]
});

logger.info('Log message sent to Loggly!');

Complete App Example

Here’s a complete example demonstrating error logging in a sample application:

const express = require('express');
const { createLogger, transports, format } = require('errorback-logger');

const app = express();
const port = 3000;

const logger = createLogger({
  level: 'info',
  format: format.combine(
    format.timestamp(),
    format.json()
  ),
  transports: [
    new transports.Console(),
    new transports.File({ filename: 'app.log' })
  ],
  exceptionHandlers: [
    new transports.File({ filename: 'exceptions.log' })
  ]
});

app.get('/', (req, res) => {
  logger.info('GET / request received');
  res.send('Hello World!');
});

app.use((err, req, res, next) => {
  logger.error('Unhandled error: ' + err.message);
  res.status(500).send('Something went wrong!');
});

app.listen(port, () => {
  logger.info(`Server running at http://localhost:${port}/`);
});

With `errorback-logger`, you can ensure robust error handling and logging in your applications, enhancing the overall reliability and maintainability.

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