Express Cowboy

It calms the thundering herd

NPM

Why?

When you have a service that is failing, you don't want to keep hitting it. You want to give it a break and try again later. This is what circuit breakers are for.

For some reason NPM didn't have anything good for Express. Now it does.

This code is heavily based on Opossum's Circuit Breaker implementation.

How?

import * as express from "express";
import { circuitBreakerMiddleware } from "express-cowboy";

const app = express();
const cb = circuitBreakerMiddleware({
  maxFailures: 5,
  timeout: 10000,
  resetTimeout: 30000,
});
app.use(cb.middleware);