node.js - Setting up kafka listener in nodejs microservice -


i wondering how proceed set of kafka listener. should running 2 separate processes node server.js , node kafka-listener.js every micro service?

i have sample code of both of them:

this server.js runs node server

    require('dotenv').config() // accesses environment variables .env file @ root of folder or docker environment  var port = process.env.port; const express = require("express"),     createtables = require("./config/createtables.js"),     vogels = require('vogels'),     morgan = require('morgan'),     logger = require('./config/logger'),     app = express(),     bodyparser = require("body-parser");  createtables();   app.use(bodyparser.urlencoded({extended:true})); app.use(bodyparser.json());  //we using different port testing because might want have development server on when run tests if (process.env.node_env === "test") {     port = 3002 }  app.use(morgan('dev', {     skip: function (req, res) {         return res.statuscode < 400     }, stream: process.stderr }));  app.use(morgan('dev', {     skip: function (req, res) {         return res.statuscode >= 400     }, stream: process.stdout }));  var routes = require('./api/routes/lrroutes'); routes(app);   app.listen(port, function(){     logger.info('example app listening on port ' + port); });  module.exports = app; // testing

this sample kafka listener (kafka-listener.js):

var kafka = require('kafka-node'),         consumer = kafka.consumer,         client = new kafka.client(),         consumer = new consumer(client,                     [{ topic: 'name', offset: 0}],                     {                                     autocommit: false                                 }                 );  consumer.on('message', function (message) {         console.log(message); });  consumer.on('error', function (err) {         console.log('error:',err); })  consumer.on('offsetoutofrange', function (err) {         console.log('offsetoutofrange:',err); })

should listener run separate process? or there other alternative this?

if have inputs how routing done once there message listener. please add too.


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