async-retry-wrapper

Documentation

Retry wrapper for async function.

Installation

$ npm install async-retry-wrapper

Javascript

const retryWrapper = require('async-retry-wrapper');

Typescript

import * as retryWrapper from 'async-retry-wrapper';

Usage

functions

An object consisting of an async function may be used. If it is not an async function, an error occurs.

const retryWrapper = require('async-retry-wrapper');

const functions = {
    logger: async () => {
        console.log('hello world!!');
    },
};

const wrappedFunctions = retryWrapper(functions);

option

You can also change the retry settings if you want(If there is no parameter, it operates as Default).

There are a total of three options.

• options
  • count : How many times are you going to try again?
    • default: 1
  • interval: How often will you try again?, 0 means as quickly as possible.
    • default: 0 (milliseconds)
  • rule: When are you gonna stop trying again?, Only one parameter is error.
    • default: Retry if an error occurs
  • logging: Do I need a log for retries?
    • default: false

The example is an option to retry twice more at 100 ms intervals when the response status is not 500.

const retryWrapper = require('async-retry-wrapper');

const options = {
    count: 2,
    interval: 100, 
    // If the response status code is not 500, the retry will be stopped
    rule: err => err.status !== 500,
    logging: true,
};

const wrappedFunctions = retryWrapper(someFunObject, options);

Demo

// import library
const retryWrapper = require('async-retry-wrapper');

// test object to be wrapped
const testFunctions = {
    logAndThrow: async () => {
        console.log('welcome');
        throw new Error('with occur error!');
    },
    log: async () => {
        console.log('hello world!');
    },
};

// wrapping object
const wrappedFunctions = retryWrapper(testFunctions);

// now you can see the function retries
wrappedFunctions['logAndThrow']();

License

MIT License