Building Reactive Microservices with JHipster & K8s

@sendilkumarn Reactive Microservices with JHipster SENDIL KUMAR N

@sendilkumarn @sendilkumarn

@sendilkumarn Why Microservices?

@sendilkumarn Microservices

@sendilkumarn Microservices Microservices Microservices

@sendilkumarn Microservices Microservices

@sendilkumarn Microservices Independent Deployability Microservices

@sendilkumarn Microservices contract contract contract contract Microservices

@sendilkumarn Microservices I own my data I own my data
I own my data I own my data Microservices

@sendilkumarn Microservices Microservices Microservices Microservices

@sendilkumarn Do one thing & do it well Independent deployability
No single point of failure

@sendilkumarn Why Reactive microservices?

@sendilkumarn Highly-interactive & ultra-fast experiences Things that scale dynamically Utilize
the maximum benefit out of the systems Reactive µ-service

@sendilkumarn Service Service Over a network Reactive µ-service

@sendilkumarn Reactive µ-service Get me some data. Green → Yellow
service - latency : 50ms Yellow → Orange service - latency : 100ms Yellow → Blue service - latency : 20ms 170 ms

@sendilkumarn Reactive µ-service Get me some data. Green → Yellow
service - latency : 50ms Green → Orange service - latency : 100ms Green → Blue service - latency : 20ms 100 ms Reactive µ-service

@sendilkumarn Non-blocking Reactive µ-service

@sendilkumarn Reactive µ-service Responsive Resilient Elastic Message Driven Reactive µ-service

@sendilkumarn Reactive µ-service Asynchronous Message Passing Reactive µ-service

@sendilkumarn Reactive µ-service In a reactive system, every part should
be reactive Reactive µ-service

@sendilkumarn more than 750 req/s Reactive µ-service

@sendilkumarn Reactive µ-service

@sendilkumarn

@sendilkumarn Spring Reactive

@sendilkumarn Spring Reactive @PostMapping("/users") public User createUser(@Valid @RequestBody User user)
{ // Handle errors User result = userRepository.save(user); // do something with the result return ResponseEntity .created(new URI("/api/users/" + result.getId())) .headers(HeaderUtil.createEntityCreationAlert (...)) .body(result); } Spring Reactive

@sendilkumarn Spring Reactive @PostMapping("/users") public Mono<User> createUser(@Valid @RequestBody User user)
{ // Handle errors return userRepository.save(user) .flatMap( // Do something with the users ) .map( result -> return ResponseEntity .created(new URI("/api/users/" + result.getId())) .headers(HeaderUtil.createEntityCreationAlert (...)) .body(result); ) } Reactive Spring Reactive

@sendilkumarn Spring Reactive Gateway Service A Service B Message Queue

@sendilkumarn Spring Reactive Gateway Service A Service B Message Queue
reactive reactive reactive reactive Spring Reactive

@sendilkumarn Spring Reactive Spring Reactive

@sendilkumarn Being Reactive makes our services responsive, resilient, elastic, and
message-driven Spring Boot 2.0 introduced reactive programming for spring based applications But that is a lot…

@sendilkumarn JHipster

@sendilkumarn JHipster JHipster is a open source app. generator

@sendilkumarn JHipster JHipster is a development platform open source app.
generator

@sendilkumarn JHipster JHipster generates all bells & whistles development platform

@sendilkumarn JHipster Server Client Deployments CI/CD templates Angular / React
/ Vue / Svelte Java / Kotlin Docker / K8s / AWS / GAE GitHub / Gitlab / Sonar…

@sendilkumarn npm i -g generator-jhipster JHipster

@sendilkumarn mkdir app && cd app npm i -g generator-jhipster
JHipster

@sendilkumarn mkdir app && cd app npm i -g generator-jhipster
jhipster JHipster

@sendilkumarn Options • Monolithic / Microservices / Gateway • Spring
WebFlux / Spring MVC • Authentication • Database • Build Tool - Maven / Gradle • Web Framework JHipster

@sendilkumarn https://start.jhipster.tech/ JHipster

@sendilkumarn Demo!

@sendilkumarn Recap Why Microservices? Why Reactive µ-service? Spring Reactive Code
walkthrough JHipster Generated microservices with JHipster Deploy on Kubernetes

@sendilkumarn Questions

@sendilkumarn Thanks!!!

Building Reactive Microservices with JHipster &...

Building Reactive Microservices with JHipster & K8s

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