Adding monitoring library

package.json

@@ -78,6 +78,7 @@
   "dependencies": {
     "@aws-sdk/client-sqs": "^3.682.0",
     "@ministryofjustice/frontend": "^3.0.1",
+    "@ministryofjustice/hmpps-monitoring": "^0.0.1-alpha.6",
     "agentkeepalive": "^4.5.0",
     "applicationinsights": "^2.9.6",
     "body-parser": "^1.20.3",

server/applicationInfo.ts

@@ -9,7 +9,7 @@ export type ApplicationInfo = {
   buildNumber: string
   gitRef: string
   gitShortHash: string
-  productId?: string
+  productId: string
   branchName: string
 }
 

server/config.ts

@@ -70,6 +70,7 @@ export default {
   apis: {
     hmppsAuth: {
       url: get('HMPPS_AUTH_URL', 'http://localhost:9090/auth', requiredInProduction),
+      healthPath: '/health/ping`',
       externalUrl: get('HMPPS_AUTH_EXTERNAL_URL', get('HMPPS_AUTH_URL', 'http://localhost:9090/auth')),
       timeout: {
         response: Number(get('HMPPS_AUTH_TIMEOUT_RESPONSE', 10000)),
@@ -83,6 +84,7 @@ export default {
     },
     tokenVerification: {
       url: get('TOKEN_VERIFICATION_API_URL', 'http://localhost:8100', requiredInProduction),
+      healthPath: '/health/ping`',
       timeout: {
         response: Number(get('TOKEN_VERIFICATION_API_TIMEOUT_RESPONSE', 5000)),
         deadline: Number(get('TOKEN_VERIFICATION_API_TIMEOUT_DEADLINE', 5000)),

server/middleware/setUpHealthChecks.ts

@@ -1,39 +1,23 @@
 import express, { Router } from 'express'
 
-import healthcheck from '../services/healthCheck'
+import { monitoringMiddleware, endpointHealthComponent } from '@ministryofjustice/hmpps-monitoring'
 import type { ApplicationInfo } from '../applicationInfo'
+import logger from '../../logger'
+import config from '../config'
 
 export default function setUpHealthChecks(applicationInfo: ApplicationInfo): Router {
   const router = express.Router()
 
-  router.get('/health', (req, res, next) => {
-    healthcheck(applicationInfo, result => {
-      if (result.status !== 'UP') {
-        res.status(503)
-      }
-      res.json(result)
-    })
-  })
+  const apiConfig = Object.entries(config.apis)
 
-  router.get('/ping', (req, res) => {
-    res.send({
-      status: 'UP',
-    })
+  const middleware = monitoringMiddleware({
+    applicationInfo,
+    healthComponents: apiConfig.map(([name, options]) => endpointHealthComponent(logger, name, options)),
   })
 
-  router.get('/info', (req, res) => {
-    res.json({
-      git: {
-        branch: applicationInfo.branchName,
-      },
-      build: {
-        artifact: applicationInfo.applicationName,
-        version: applicationInfo.buildNumber,
-        name: applicationInfo.applicationName,
-      },
-      productId: applicationInfo.productId,
-    })
-  })
+  router.get('/health', middleware.health)
+  router.get('/info', middleware.info)
+  router.get('/ping', middleware.ping)
 
   return router
 }