Exceptions

Summary

This is an private npm module that provides a wrapper of Error type for use it with express framework for throwing server exceptions. And handlers for handle these exceptions.

Usage

• Install package npm i -S @vidaxl/exceptions
• Use it in your code for throw exceptions
• Use handlers as last middleware in you app

const { 
    exceptionLogger,
    exceptionHandler,

} = require('@vidaxl/exceptions');

const app = express();

app.get('/example_1', async () => {
    throw new NotImplementedException('Method is not implemented.');
});

// NOTE: Should set up as last middleware
app.use(exceptionLogger);
app.use(exceptionHandler);

Exception API

• constructor(message) - Create a instance of class Exception.
  • message type: String - A message which describes exception.
• purifyStackTrace() - Exception instance method. Returns purified stack trace of exception.
• toString() - Exception instance method. Returns a string represents exception data.
• toJSON() - Exception instance method. Returns a json string with exception data.

HTTPException

Inherits Exception base class, and extend it with static method:

• buildFromStatus(status, message) - receive parameters status and message and creates new instance of concret HTTP exception.