Summary:

• A new interface to fetch comments on the screen is defined in the comment controller.
• The processor for the interface is imported at the top of the file from comment service within the current directory.
• A processor named "index" is defined to execute the function get comments, which retrieves a list of comments and sends it to the client.
• This is enclosed in a try-catch block, with the try block declaring a variable comments to store the result of get comments.
• The response is sent back to the client using response.send with the retrieved comments data.
• Errors are handled in the catch block using next to pass the error to the application's error handler.
• The comment route is defined in the comment router with method get at the route /comment, linked to the index handler in the comment controller.
• The interface is tested with an HTTP client by creating a request named "comments list request" using the HTTP GET method to the URL api/comment.
• The server response contains all the comments in the application.