Adaptive Gateway

adaptive-gateway is a lightweight Express-compatible gateway middleware with caching, circuit-breaker fallback, and rate limiting.

Install

npm install adaptive-gateway

Usage

import express from 'express';
import gateKeep from 'adaptive-gateway';

const app = express();

app.use(express.json());

app.use('/proxy', gateKeep({
  target: 'http://localhost:3000',
  ttl: 300,
  latencyThreshold: 500,
  pathRewrite: path => path.replace(/^\/proxy/, ''),
  breakerOptions: {
    timeout: 8000,
    errorThresholdPercentage: 50,
    resetTimeout: 10000
  }
}));

app.listen(4000, () => {
  console.log('Gateway running on http://localhost:4000');
});

Named exports

import { adaptiveGateway, createGateKeepMiddleware, gateKeep } from 'adaptive-gateway';

• adaptiveGateway(options) — gateway wrapper with built-in rate limiting
• createGateKeepMiddleware(options) — reusable middleware factory
• gateKeep — alias for createGateKeepMiddleware

Options

• target — backend URL to proxy to
• ttl — cache TTL in seconds
• latencyThreshold — threshold for request caching decisions
• pathRewrite — function to rewrite the incoming request path before proxying
• breakerOptions — opossum circuit breaker configuration

Notes

This package is designed to be used in an Express app and assumes a Redis client and metrics pipeline are configured in the local project.