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Microservices for the Masses with Spring Boot, JHipster, and OAuth September 5, 2019 Matt Raible | @mraible Photo by Nicolas Raymond on https://www.flickr.com/photos/82955120@N05/7995406469

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Do you use microservices?

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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

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developer.okta.com

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What About You?

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

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

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Microservices Visionaries

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“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

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“Do one thing and do it well.”

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“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

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start.spring.io

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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/java- microservices-examples

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Java Microservices with Spring Boot and Spring Cloud https://developer.okta.com/blog/2019/05/22/java-microservices-spring-boot-spring-cloud

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

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What is JHipster? + =

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

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

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A powerful workflow to build your application with Webpack and Maven/Gradle JHipster Goals A sleek, modern, mobile-first front-end with modern frameworks 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

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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

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Microservices with JHipster

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

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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

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Monolith Examples JHipster 6 Demo github.com/mraible/jhipster6-demo youtu.be/uQqlO3IGpTU 21-Points Health github.com/mraible/21-points infoq.com/minibooks/jhipster-mini-book

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

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

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Progressive Web Apps Are fast!

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

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

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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/java- microservices-examples

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JHipster 6.2.0 Lighthouse Report

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

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

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

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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

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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

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

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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

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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).

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

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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!

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Use Ionic for JHipster to Create Mobile Apps https://developer.okta.com/blog/2019/06/24/ionic-4-angular-spring-boot-jhipster

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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

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

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Demo Create an Ionic 4 app for JHipster Generate entities that exist on gateway Deploy to emulator Deploy to phone https://github.com/oktadeveloper/ okta-ionic4-jhipster-example

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

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What You Learned

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Microservices with Spring Cloud Config and JHipster https://developer.okta.com/blog/2019/05/23/java-microservices-spring-cloud-config

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

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What’s Next for JHipster? Full Reactive with WebFlux and Spring Cloud Gateway Spring Boot 2.2 GraphQL and Micro Frontends

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The JHipster Mini-Book
 Written with Asciidoctor Free download from InfoQ: infoq.com/minibooks/jhipster-mini-book Quick and to the point, 164 pages Developed a real world app: www.21-points.com Buy for $20 or download for FREE

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

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developer.okta.com/blog @oktadev

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Reactive Microservices with Spring Cloud Gateway https://developer.okta.com/blog/2019/08/28/reactive-microservices-spring-cloud-gateway

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Action: Try JHipster! https://developer.okta.com/blog/2019/04/04/java-11-java-12-jhipster-oidc

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

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

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developer.okta.com