adding target load balancer demo

Author: Rolando Santamaria Maso

demos/target-load-balancer.js

@@ -0,0 +1,29 @@
+'use strict'
+
+const gateway = require('../index')
+const { P2cBalancer } = require('load-balancers')
+
+// @TODO: update the list of target origins
+const targets = [
+  'http://localhost:3000',
+  'https://httpbin.org'
+]
+const balancer = new P2cBalancer(targets.length)
+
+gateway({
+  routes: [{
+    proxyHandler: (req, res, url, proxy, proxyOpts) => {
+      proxyOpts.base = targets[balancer.pick()]
+
+      return proxy(req, res, url, proxyOpts)
+    },
+    prefix: '/balanced'
+  }]
+}).start(8080).then(() => console.log('API Gateway listening on 8080 port!'))
+
+const service = require('restana')({})
+service
+  .get('/get', (req, res) => res.send({ msg: 'Hello from service 1!' }))
+  .start(3000).then(() => console.log('Public service listening on 3000 port!'))
+
+// Usage: curl 'http://localhost:8080/balanced/get'

package.json

@@ -51,6 +51,7 @@
     "fg-multiple-hooks": "^1.2.0",
     "helmet": "^4.2.0",
     "http-lambda-proxy": "^1.1.2",
+    "load-balancers": "^1.3.52",
     "micromatch": "^4.0.2",
     "mocha": "^8.2.1",
     "nyc": "^15.1.0",