Error handling and API documentation

Error handling is a critical aspect of building robust microservices to ensure graceful degradation and effective debugging. Clear and comprehensive API documentation is essential for enabling developers to understand and consume your microservices.

Error handling

Here’s how you can handle errors in a Node.js microservices environment:

• Express.js error handling middleware: Use Express.js middleware to handle errors globally. This middleware is invoked for unhandled errors that occur during request processing. The following snippet is an example of this:

  app.use((err, req, res, next) => {

    console.error(err.stack);

    res.status(500).send('Something went wrong!');

  });

• Custom error classes: Create custom error classes for different types of errors that may occur in your application. This helps in identifying and handling errors more precisely. The following snippet is an example of this:

  class CustomError...