Revert "chore: remove workload script (#33)"

This reverts commit 3a1a2a5.

.workload.js

@@ -0,0 +1,70 @@
+'use strict'
+
+require('elastic-apm-node').start({
+  servieName: process.env.WORKLOAD_ELASTIC_APM_SERVICE_NAME,
+  serverUrl: process.env.WORKLOAD_ELASTIC_APM_SERVER_URL,
+  active: process.env.NODE_ENV === 'production'
+})
+
+var Workload = require('workload')
+var conf = require('./server/config')
+var url = conf.server.url + '/'
+var api = url + 'api/'
+
+module.exports = {
+  max: 120,
+  filters: [
+    Workload.stdFilters.expand,
+    Workload.stdFilters.workdays,
+    fillOutOrder
+  ],
+  requests: [
+    {weight: 10, url: url},
+    {weight: 10, url: url + 'favicon.ico'},
+    {weight: 1, url: url, method: 'OPTIONS'},
+
+    // api
+    {weight: 8, url: api + 'stats'},
+    {weight: 7, url: api + 'products'},
+    {weight: 8, url: api + 'products/top'},
+    {weight: 6, url: api + 'products/{1..6}'},
+    {weight: 3, url: api + 'products/{1..6}/customers'},
+    {weight: 1, url: api + 'products/5/customers?count=orders&limit=50'},
+    {weight: 3, url: api + 'types'},
+    {weight: 3, url: api + 'types/{1..3}'},
+    {weight: 5, url: api + 'customers'},
+    {weight: 4, url: api + 'customers/{1..1000}'},
+    {weight: 7, url: api + 'orders'},
+    {weight: 1, url: api + 'orders', method: 'POST'},
+    {weight: 6, url: api + 'orders/{1..500}'},
+
+    // errors
+    {weight: 2, url: url + 'log-error'},
+    {weight: 2, url: url + 'log-message'},
+    {weight: 1, url: url + 'is-it-coffee-time'},
+    {weight: 1, url: url + 'throw-error'},
+    {weight: 1, url: url + 'throw-async-error'}
+  ]
+}
+
+function fillOutOrder (req, next) {
+  if (req.method === 'POST' && req.url === api + 'orders') {
+    var order = {
+      customer_id: randId(1000),
+      lines: []
+    }
+    for (var n = 0; n < 5; n++) {
+      order.lines.push({id: randId(3), amount: rand(3) + 1})
+    }
+    req.json = order
+  }
+  next(req)
+}
+
+function rand (max) {
+  return Math.round(Math.random() * max)
+}
+
+function randId (max) {
+  return rand(max - 1) + 1
+}

package.json

@@ -10,7 +10,8 @@
     "express": "^4.14.0",
     "pg": "^6.1.2",
     "redis": "^2.6.3",
-    "request": "^2.79.0"
+    "request": "^2.79.0",
+    "workload": "^2.3.0"
   },
   "devDependencies": {
     "dotenv": "^4.0.0",
@@ -25,7 +26,8 @@
     "client-pull": "(cd client && git pull)",
     "client-install": "npm install --prefix client",
     "client-build": "npm run build --prefix client",
-    "start": "node server.js"
+    "start": "node server.js",
+    "workload": "workload -f .workload.js"
   },
   "repository": {
     "type": "git",