Microservices are being deployed by many Java Hipsters. If you're working with a large team that needs different release cycles for product components, microservices can be a blessing. If you're working at your VW Restoration Shop and running its online store with your own software, having five services to manage and deploy can be a real pain. This presentation will show you how to use JHipster to create Angular + Spring Boot apps with a unified front-end. You will leave with the know-how to create your own excellent apps! Bonus: I'll show you how to use Ionic for JHipster to create native applications on mobile. It's pretty darn slick!

1. Microservices for the Masses with Spring Boot, JHipster, and OAuth
April 24, 2019
Matt Raible | @mraible
Photo by Premnath Thirumalaisamy flickr.com/photos/premnath/8220483905
#GIDS19

2. Do you use microservices?

4. Blogger on raibledesigns.com and
developer.okta.com/blog
Web Developer and Java Champion
Father, Husband, Skier, Mountain
Biker, Whitewater Rafter
Open Source Connoisseur
Hi, I’m Matt Raible!
Bus Lover
Okta Developer Advocate

8. developer.okta.com

9. What About You?

10. Agenda
1. Introduction to Microservices
2. Microservices with JHipster
3. Deploying to the Cloud
4. Developing Mobile Apps with JHipster
5. JHipster Roadmap

11. Part 1
Introduction to Microservices
History of Microservices
Microservices Architecture Philosophy
Why Microservices?
Demo: A Microservices Architecture with
Spring Boot and Spring Cloud

13. Microservices Visionaries

15. “Any organization that designs a system
(defined broadly) will produce a design
whose structure is a copy of the
organization's communication structure.”
Conway’s Law
Melvin Conway 1967

16. “Do one thing and do it well.”

17. “You shouldn't start with a microservices
architecture. Instead begin with a
monolith, keep it modular, and split it
into microservices once the monolith
becomes a problem.”
Martin Fowler March 2014

19. start.spring.io

22. Microservices with Spring Boot
developer.okta.com/blog/2017/06/15/build-microservices-architecture-spring-boot

23. Demo
Using start.spring.io, create:
A service registry
A gateway
A catalog service
Create an endpoint in the catalog service
Create a filtered endpoint in the gateway
Show failover capabilities
Show Spring Security OAuth
https://github.com/oktadeveloper/spring-
boot-microservices-example

24. Microservices with JHipster
What is JHipster?
Installing and Using JHipster
JHipster’s Microservice Features
Progressive Web Applications Overview
Part 2

25. What is JHipster?
+ =

26. @spring_io
#springio17
JHipster jhipster.tech
JHipster is a development platform to generate, develop and deploy
Spring Boot + Angular/React Web applications and Spring microservices.
and Vue! ✨

27. JHipster is Inclusive
https://github.com/jhipster/jhipster-artwork

28. A powerful workflow to build your
application with Yeoman, Webpack/
Gulp and Maven/Gradle
JHipster Goals
A sleek, modern, mobile-first front-
end with Angular and Bootstrap
A high-performance and robust
Java stack on the server side with
Spring Boot
A robust microservice architecture
with JHipster Registry, Netflix OSS,
Elastic Stack, and Docker

29. How to Use JHipster
Install JHipster and Yeoman, using npm:
npm install -g generator-jhipster
Create a directory and cd into it:
mkdir newapp && cd newapp
Run it!
jhipster

30. @spring_io
#springio17
Microservices with JHipster

31. https://www.jhipster.tech/microservices-architecture

32. Validate ID
Token
Token Endpoint
Authorization Endpoint
/.well-known/
openid-configuration
JWKS Endpoint
UserInfo Endpoint
OAuth 2.0 Authorization Server &
OpenID Connect Provider (OP)
OAuth 2.0 Resource Server
Client
(Relying Party)
1
3
2
54
1 Discover OpenID Provider Metadata
2
Perform OAuth flow to obtain a ID
token and/or access token
3 Get JSON Web Key Set (JWKS) for
signature keys
4 Validate ID token
(JSON Web Token)
5 Get additional user attributes with
access token from UserInfo
endpoint
OAuth 2.0 and OIDC

33. yelp.com/callback
Back to redirect URI
with authorization code
Exchange code for
access token and ID token
accounts.google.com
Email
**********
Go to authorization server
Redirect URI: yelp.com/cb
Scope: openid profile
Authorization Server
yelp.com
Connect with Google
Resource owner
Client
accounts.google.com
Allow Yelp to access your public
profile and contacts?
No Yes
Request consent
from resource owner
Hello Matt!
accounts.google
Get user info
with access token
/userinfo
OAuth 2.0 and OIDC

34. Monolith Examples
JHipster 5 Demo
github.com/mraible/jhipster5-demo
youtu.be/-VQ_SVkaXbs
21-Points Health
github.com/mraible/21-points
infoq.com/minibooks/jhipster-mini-book-5

35. Progressive Web Apps
Originate from a secure origin, load while offline, and reference a
web app manifest.

36. Progressive Web Apps
Can be installed on your mobile device, look and act like a native
application, but are distributed through the web.

37. Progressive Web Apps
Are fast!

38. Enable PWA in JHipster
<script>
if ('serviceWorker' in navigator) {
window.addEventListener('load', function() {
navigator.serviceWorker.register('/service-worker.js')
.then(function () {
console.log('Service Worker Registered');
});
});
}
</script>
gateway/src/main/webapp/index.html

39. Force HTTPS in Spring Boot
gateway/src/main/java/com/okta/developer/gateway/config/OAuth2SsoConfiguration.java
@Configuration
public class OAuth2SsoConfiguration extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.requiresChannel()
.requestMatchers(r -> r.getHeader("X-Forwarded-Proto") != null)
.requiresSecure();
}
}
developer.okta.com/blog/2018/07/30/10-ways-to-secure-spring-boot

40. Demo
Using JHipster, create:
A gateway
A store microservices app
A blog microservices app
Generate entities in apps and on gateway
Convert gateway to be a PWA
Run everything in Docker
https://github.com/oktadeveloper/okta-
jhipster-microservices-oauth-example

41. Part 3
Deploy to the Cloud
Options for Deploying JHipster
Heroku
Cloud Foundry
AWS
Google Cloud
Microsoft Azure

42. For monoliths:
jhipster heroku
For microservices:
Deploy JHipster Registry
Build and deploy microservice
Build and deploy gateway
http://bit.ly/heroku-jhipster-microservices

43. For monoliths:
jhipster cloudfoundry
For microservices:
Deploy JHipster Registry
Build and deploy microservice
Build and deploy gateway
http://www.jhipster.tech/cloudfoundry

44. Using Elastic Container Service
jhipster aws-containers
Using Elastic Beanstalk
jhipster aws
Boxfuse
boxfuse run -env=prod
http://www.jhipster.tech/aws
http://www.jhipster.tech/boxfuse

45. mvn package -Pprod jib:dockerBuild
jhipster kubernetes
./kubectl-apply.sh
kubectl get svc gateway
https://developer.okta.com/blog/2017/06/20/
develop-microservices-with-jhipster

46. Demo Build Your JHipster App for Production
Deploy with Kubernetes and Minikube
Deploy to Google Cloud
https://github.com/oktadeveloper/
jhipster-microservices-example

47. Part 4
Developing Mobile Apps with JHipster
What is Ionic?
Why?
Ionic Module for JHipster
JWT and OIDC Support
Entity Generator

48. Ionic
Ionic Framework
Develop Hybrid & PWA
Apps
https://ionicframework.com
Stencil
Vanilla Web
Components
https://stenciljs.com
PWA Toolkit
Lightning fast PWAs
https://github.com/ionic-
team/ionic-pwa-toolkit

49. Why?
The first version of 21-Points Health I wrote with JHipster 2.x was
painful to use on a mobile device. Versions 4.x and 5.x are better, but
still not great.
I want to develop the best user experience. Native apps are painful to
distribute, but work better than PWAs (on iOS).

50. How is a mobile app for JHipster
different from its Angular UI?

51. Run it!
yo jhipster-ionic
Ionic Module for JHipster
Because Ionic Apps need some JHipster 💙 too!
https://github.com/oktadeveloper/generator-jhipster-ionic
Install Ionic and the Ionic Module for JHipster, using npm:
npm install -g ionic generator-jhipster-ionic
Profit!
🤑

52. Use Ionic for JHipster to Create Mobile Apps
developer.okta.com/blog/2018/01/30/jhipster-ionic-with-oidc-authentication

53. Create an app:
ignite new myapp -b ignite-jhipster
Ignite JHipster
https://github.com/ruddell/ignite-jhipster
Install Ignite CLI and Ignite JHipster, using npm:
npm i -g ignite-cli ignite-jhipster
Ignite!
🔥
A React Native boilerplate for JHipster apps

54. Build a Mobile App with React Native
developer.okta.com/blog/2018/10/10/react-native-spring-boot-mobile-app

55. Part 5 JHipster Roadmap
What You Learned
What’s Next for JHipster

56. What You Learned

57. JHipster Mobile Apps and Microservices on Pluralsight
pluralsight.com/courses/play-by-play-developing-microservices-mobile-apps-jhipster

58. What’s Next for JHipster?
💥 JHipster v6.0
Soon!
start.jhipster.techSpring WebFlux Support
Blueprint Support
React Support

59. The JHipster Mini-Book
Written with Asciidoctor
Free download from InfoQ:
infoq.com/minibooks/jhipster-mini-book-5
Quick and to the point, 164 pages
Developed a real world app:
www.21-points.com
v5.0.2 released last week!

60. Learn More
stackoverflow.com
Spring Boot
spring.io/guides
JHipster
www.jhipster.tech
Okta APIs
developer.okta.com

61. developer.okta.com/blog
@oktadev

62. React PWA with JHipster 5
developer.okta.com/blog/2018/06/25/react-spring-boot-photo-gallery-pwa

63. Action: Try JHipster!
JHipster 5 Demo
github.com/mraible/jhipster5-demo
youtu.be/-VQ_SVkaXbs
21-Points Health
github.com/mraible/21-points
infoq.com/minibooks/jhipster-mini-book-5

64. git clone https://github.com/oktadeveloper/okta-spring-webflux-react-
example.git
github.com/oktadeveloper/okta-jhipster-microservices-oauth-example
Use the Source, Luke!

65. Thanks!
Keep in Touch
raibledesigns.com
@mraible
Presentations
speakerdeck.com/mraible
Code
github.com/oktadeveloper
developer.okta.com

66. developer.okta.com