Created
August 28, 2019 20:54
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ACME product microservice for IBM Watson Assistant
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| 'use strict'; | |
| const express = require('express'); | |
| const Prometheus = require('prom-client') | |
| const client = require('prom-client'); | |
| const bodyParser = require('body-parser'); | |
| var mongo = require('./mongo.js'); | |
| //Prometheus | |
| const counterProductAll = new client.Counter({ | |
| name: 'product_request_calls_counter', | |
| help: 'count product calls' | |
| }); | |
| // Constants | |
| const port = process.env.PORT || 8080; | |
| // App | |
| const app = express(); | |
| app.use(bodyParser.urlencoded({ | |
| extended: true | |
| })); | |
| app.use(bodyParser.json()); | |
| //products exposed as POST method and context '/products' | |
| app.post('/products', (req, res) => { | |
| console.log(req.headers) | |
| console.log(req.body); | |
| counterProductAll.inc(); | |
| res.set('Content-Type', "application/json") | |
| if (req.body.param_name == 'Products') { | |
| console.log("calling mongodb - retrieving Product list") | |
| mongo.configDB.collection = 'product'; | |
| mongo.find(mongo.configDB, {}).then(result => { | |
| console.log(result); | |
| var text = result.map(function(elem){ | |
| return elem.name; | |
| }).join("\n\u2022"); | |
| res.send({'response': '\n\u2022'.concat(text)}) | |
| }).catch(err=> { | |
| res.send({'response': err}) | |
| }) | |
| } | |
| }) | |
| app.get('/metrics', (req, res) => { | |
| res.set('Content-Type', Prometheus.register.contentType) | |
| res.end(Prometheus.register.metrics()) | |
| }); | |
| var server = app.listen(port, function () { | |
| console.log('Server running at http://127.0.0.1:' + port + '/'); | |
| }); |
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