Microservices for the Masses with Spring Boot, JHipster, and JWT - Rich Web 2016

Dec 8, 20165 likes4,184 views

Microservices are all the rage and being deployed by many Java Hipsters. If you’re working on 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. Share your knowledge and experience about microservices in this informative and code-heavy talk. We’ll use JHipster (a Yeoman generator) to create Angular + Spring Boot apps on separate instances with a unified front-end. I’ll also show you options for securing your API gateway and individual applications using JWT. Heroku, Kubernetes, Docker, ELK, Spring Cloud, Stormpath; there will be plenty of interesting demos to see!

Microservices for the Masses
Spring Boot · JWT · JHipster
Brought to you by Matt Raible and Stormpath

Microservices for the Masses with Spring Boot, JHipster, and JWT - Rich Web 2016

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

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

Microservices are awesome, but they’re not free.
Les Hazlewood Stormpath CTO

JHipster by the numbers
+250 contributors
+5400 Github stars
+320,000 installations
+100 companies ofﬁcially using it

How to use JHipster
To install JHipster, you run an npm command:
$ npm install -g generator-jhipster
$ mkdir myapp && cd myapp
$ yo jhipster

What’s Generated?
Spring Boot application
AngularJS application
Liquibase changelog ﬁles
Conﬁguration ﬁles

Security Screens
Several generated screens
Login, logout, forgot password
Account management
User management
Useful for most applications
Pages must be tweaked
User roles will be added/extended
Provides good examples of working screens
Forms, directives, validation…

Admin Screens
Monitoring
Health
Spring Boot conﬁguration
Spring Security audits
Log management
Very useful in production

Securing your API
Choose the Right API Security Protocol
Basic API Authentication w/ TLS (formlerly known as SSL)
OAuth1.0a, OAuth2
API Keys vs. Username/Password Authentication
Store Your API Security Key securely
Use globally unique IDs (e.g. Url62)
Avoid sessions, especially in URLs

How to Secure your API
https://www.youtube.com/watch?v=hdSrT4yjS1g
Learn more on the Stormpath blog

Create a JWT in Java
String jwt = Jwts.builder()
.setSubject("users/TzMUocMF4p")
.setExpiration(new Date(1300819380))
.claim("name", "Robert Token Man")
.claim("scope", "self groups/admins")
.signWith(
SignatureAlgorithm.HS256,
"secret".getBytes("UTF-8")
)
.compact();

Validating a JWT
String jwt = // get JWT from Authorization header
Jws<Claims> claims = Jwts.parser()
.setSigningKey("secret".getBytes("UTF-8"))
.parseClaimsJws(jwt)
String scope = claims.getBody().get("scope")
assertEquals(scope, "self groups/admins");

Better Secret
String b64EncodedSecret =
"Yn2kjibddFAWtnPJ2AFlL8WXmohJMCvigQggaEypa5E=";
.signWith(SignatureAlgorithm.HS256,
TextCodec.BASE64.decode(b64EncodedSecret))

JWTs in Java for CSRF and Microservices
https://www.youtube.com/watch?v=QSYK4OCmycI
Learn more on the Stormpath blog

Microservices are not free, but you get a deep discount
on microservices with JHipster.
Matt Raible 2016

JHipster.next
Angular 2
JUnit 5
Spring 5 and Reactive
Apache Kafka
HTTP/2
Progressive Web App Support

Do one thing and do it well.
Unix philosophy

This Presentation and Demos
https://github.com/mraible/microservices-for-the-masses

Image Credits
Fountain of colours - Paulius Malinovskis on Flickr
Ponte dell’Accademia at Sunrise - Trey Ratcliff on Stuck in Customs
Conway’s Law - Martin Fowler and James Lewis on Microservices
Good Morning Denver - Sheila Sund on Flickr
Monoliths - Arches National Park on Flickr
Mexico - Trish McGinity on McGinity Photo
Future - vivianhir on Flickr
Spring Runoff - Ian Sane on Flickr
The memory Seeker, Santa Monica Pier, CA - Pacheco on Flickr
San Francisco By Night - Trish McGinity on McGinity Photo

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Remember the choose your own adventure books that you used to read as a kid? This session is a reincarnation of a choose your own adventure book as a conference talk! You'll learn about Spring Boot, Docker, and Kubernetes in this talk, along with the choices you make in the following areas: * What kind of application architecture to build? Monolith or microservices? * Would you like to use Java or Kotlin? * MySQL, PostgreSQL, or MongoDB? * Spring MVC or Spring WebFlux? * Angular, React, or Vue.js? * PWA or mobile app? * Istio with Kubernetes or Kubernetes without Istio? GitHub repos of demos: * Monolith: https://github.com/mraible/healthy-hipster * Microservices: https://github.com/mraible/ujug-microservices

Experienced Selenium Interview questionsarchana singh

The document contains answers to various questions about automated testing using Selenium WebDriver. It discusses topics like how to handle dynamic objects, the WebDriver interface, locating elements, performing keyboard and mouse actions, dropdown handling, getting text from the UI, dealing with dynamic dropdowns, verifying colors, checking which tab is enabled, clicking links, implicit vs explicit waits, checking if elements are enabled, handling windows and alerts, switching frames, using the Actions class for mouse and keyboard actions, autocomplete text boxes, proxy settings, file uploads, calendar popups, reading and writing to Excel, finding row counts in tables, TestNG annotations and advantages, and group execution in TestNG XML files.

Automatic deployment on .NET web stack (Minsk .NET meetup 12.02.14)Is Antipov

Microservices for the Masses with Spring Boot, JHipster, and OAuth - Switzerl...Matt Raible

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! Related blog posts: * Java Microservices with Spring Boot and Spring Cloud: https://developer.okta.com/blog/2019/05/22/java-microservices-spring-boot-spring-cloud * Java Microservices with Spring Cloud Config and JHipster: https://developer.okta.com/blog/2019/05/23/java-microservices-spring-cloud-config * Secure Reactive Microservices with Spring Cloud Gateway: https://developer.okta.com/blog/2019/08/28/reactive-microservices-spring-cloud-gateway

#MBLTdev: Разработка первоклассных SDK для Android (Twitter)e-Legion

Ty Smith discusses building lightweight yet powerful Fabric SDKs. The SDKs are easy to integrate, extensible to support different app types, minimize permissions and network usage, and reduce startup time and binary size. Fabric SDKs provide powerful functionality while remaining lightweight through techniques like using protocol buffers to reduce network traffic, setting lower thread priorities to decrease startup time, and minimizing included methods to reduce the Dalvik method count.

Internet and Web Technology (CLASS-9) [React.js] | NIC/NIELIT Web TechnologyAyes Chinmay

The Awesome jOOQ JavaOne TalkLukas Eder

The document discusses the challenges of integrating SQL and Java applications. It covers traditional approaches like JDBC and EJB that require developers to handle low-level SQL details manually. This can lead to error-prone and inefficient code. The document proposes an alternative approach called jOOQ that aims to simplify SQL usage from Java. It provides examples of how jOOQ can be used to avoid complexities of other approaches and more directly express SQL queries and results from Java code.

Entrepreneurship3Yenwen Feng

This document summarizes the experiences of Feng Yanwen in technology entrepreneurship. It discusses the companies he has founded, including Willmobile, and the lessons learned around development processes, tools, scalability, hosting, and entrepreneurship. Key points include choosing the right framework for a project, using agile development methods, planning for scalability from the start, and understanding burn rate and operations costs when starting a business.

Building Twitter's SDKs for AndroidAndy Piper

Learn hints, tips and tricks from the Twitter Fabric development team, and the principles that guided their creation of this modular and powerful SDK. Presentation delivered at DroidconNL, Amsterdam, Nov 2014 Thanks to Andrea Falcone and the Fabric team for content and materials. You can see a lightning version of this talk delivered at Twitter Flight here -> https://www.youtube.com/watch?v=3h7jQU1AOvw&index=2&list=PLFKjcMIU2WsjUiy7UcPiWNxktpin0WDgu

Microservices for the Masses with Spring Boot, JHipster, and OAuth - Utah JUG...Matt Raible

Microservices are all the rage and 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. Share your knowledge and experience about microservices in this informative and code-heavy talk. We’ll use JHipster (a Yeoman generator) to create Angular + Spring Boot apps on separate instances with a unified front-end. I’ll also show you options for securing your API gateway and individual applications using JWT. Heroku, Kubernetes, Docker, ELK, Spring Cloud, Okta; there will be plenty of interesting demos to see!

10 Excellent Ways to Secure Your Spring Boot Application - The Secure Develop...Matt Raible

Spring Boot is an excellent way to build Java applications with the Spring Framework. If you’re developing apps that handle sensitive data, you should make sure they’re secure. This session will cover HTTPS, dependency checking, CSRF, using a CSP to prevent XSS, OIDC, password hashing, and much more! You’ll learn how to add these features to a real application, using the Java language you know and love. YouTube: https://www.thesecuredeveloper.com/post/10-excellent-ways-to-secure-your-spring-boot-application Blog post: https://developer.okta.com/blog/2018/07/30/10-ways-to-secure-spring-boot Cheat sheet: https://snyk.io/blog/spring-boot-security-best-practices/

6 ways to hack your JavaScript application by Viktor Turskyi OdessaJS Conf

Creating Custom Dojo Widgets Using WTPnsandonato

Microservices for the Masses with Spring Boot, JHipster, and JWT - Devoxx UK...Matt Raible

Microservices for the Masses with Spring Boot, JHipster, and JWT - J-Spring 2017Matt Raible

jRecruiter - The AJUG Job Posting ServiceGunnar Hillert

Microservices for the Masses with Spring Boot, JHipster, and OAuth - South We...Matt Raible

#NoXML: Eliminating XML in Spring Projects - SpringOne 2GX 2015Matt Raible

Mockito a software testing project a.pdfshohrehajoudanian1

JS Fest 2019. Виктор Турский. 6 способов взломать твое JavaScript приложениеJSFestUA

Choose Your Own Adventure with JHipster & Kubernetes - Utah JUG 2020Matt Raible

Experienced Selenium Interview questionsarchana singh

Automatic deployment on .NET web stack (Minsk .NET meetup 12.02.14)Is Antipov

Microservices for the Masses with Spring Boot, JHipster, and OAuth - Switzerl...Matt Raible

#MBLTdev: Разработка первоклассных SDK для Android (Twitter)e-Legion

Internet and Web Technology (CLASS-9) [React.js] | NIC/NIELIT Web TechnologyAyes Chinmay

The Awesome jOOQ JavaOne TalkLukas Eder

Entrepreneurship3Yenwen Feng

Building Twitter's SDKs for AndroidAndy Piper

Microservices for the Masses with Spring Boot, JHipster, and OAuth - Utah JUG...Matt Raible

10 Excellent Ways to Secure Your Spring Boot Application - The Secure Develop...Matt Raible

6 ways to hack your JavaScript application by Viktor Turskyi OdessaJS Conf

Creating Custom Dojo Widgets Using WTPnsandonato

More from Matt Raible (20)

Keep Identities in Sync the SCIMple Way - ApacheCon NA 2022Matt Raible

What if keeping your user stores in sync across domains was as simple as running "java -jar"? With Apache SCIMPle, it is! Apache SCIMple is a SCIM 2.0-compliant server powered by Spring Boot 3. You can run it standalone or embedded in your existing app. It exposes user management REST endpoints and handles the hassle of user synchronization for you. If your identity provider supports SCIM, use the simple way! GitHub example: https://github.com/mraible/okta-scim-spring-boot-example Demo script: https://github.com/mraible/okta-scim-spring-boot-example/blob/main/demo.adoc

Micro Frontends for Java Microservices - Belfast JUG 2022Matt Raible

You've figured out how to split up your backend services into microservices and scale your teams to the moon, right? But what about the frontend? Are you still building monoliths for your UI? If so, you might want to check out micro frontends—basically extensions to the microservices pattern, where the concept is extended to the frontend. Find out how to package and deploy your microservices and their UIs in the same artifact, as well as make it possible to test and develop them independently. In this live session, Matt will show you how to build a microservices and micro frontends architecture using Angular, Spring Boot, and Spring Cloud. Related blog post: https://auth0.com/blog/micro-frontends-for-java-microservices GitHub repo: https://github.com/oktadev/auth0-micro-frontends-jhipster-example

Micro Frontends for Java Microservices - Dublin JUG 2022Matt Raible

The document discusses micro frontends for Java microservices. It provides an overview of microservices and frameworks like Spring and JHipster that can be used to develop microservices in Java. It then introduces the concept of micro frontends as an architecture for microservice applications and demonstrates how to build a sample application with micro frontends using JHipster. It also covers securing microservices with OAuth 2.1 and shows a live demo of creating and running microservice applications with JHipster.

Micro Frontends for Java Microservices - Cork JUG 2022Matt Raible

Comparing Native Java REST API Frameworks - Seattle JUG 2022Matt Raible

Use Spring Boot! No, use Micronaut!! Nooooo, Quarkus is the best!!! What about Helidon? There are a lot of developers praising the hottest, and fastest, Java REST frameworks: Micronaut, Quarkus, Spring Boot, and Helidon. In this session, you'll learn how to do the following with each framework: ✅ Build a REST API ✅ Secure your API with OAuth 2.0 ✅ Optimize for production with Docker and GraalVM I'll also share some performance numbers and pretty graphs to compare community metrics. Related blog post: https://developer.okta.com/blog/2021/06/18/native-java-framework-comparison Helidon companion post: https://developer.okta.com/blog/2022/01/06/native-java-helidon GitHub repo: https://github.com/oktadev/native-java-examples

Reactive Java Microservices with Spring Boot and JHipster - Spring I/O 2022Matt Raible

Microservice architectures are all the rage in JavaLand. They allow teams to develop services independently and deploy autonomously. Why microservices? IF you are developing a large/complex application AND you need to deliver it rapidly, frequently, and reliably over a long period of time THEN the Microservice Architecture is often a good choice. Reactive architectures are becoming increasingly popular for organizations that need to do more, with less hardware. Reactive programming allows you to build systems that are resilient to high load. In this session, I'll show you how to use JHipster to create a reactive microservices architecture with Spring Boot, Spring Cloud, Keycloak, and run it all in Docker. You will leave with the know-how to create your own resilient apps! Related blog post: https://developer.okta.com/blog/2021/01/20/reactive-java-microservices YouTube demo: https://youtu.be/clkEUHWT9-M GitHub repo: https://github.com/oktadev/java-microservices-examples/tree/main/reactive-jhipster

Comparing Native Java REST API Frameworks - Devoxx France 2022Matt Raible

Lock That Sh*t Down! Auth Security Patterns for Apps, APIs, and Infra - Devne...Matt Raible

In this session, you'll learn about recommended patterns for securing your backend APIs, the infrastructure they run on, and your SPAs and mobile apps. The world is no longer a place where you just need to secure your apps’ UI. You need to pay attention to your dependency pipeline and open-source frameworks, too. Once you have the app built, with secure-by-design code, what about the cloud it runs on? Are the servers secure? What about the accounts you use to access them? If you lock all that sh*t down, how do you codify your solution so you can transport it cloud-to-cloud, or back to on-premises? This session will explore these concepts and many more!

Native Java with Spring Boot and JHipster - Garden State JUG 2021Matt Raible

Do you want to deploy your Spring Boot apps in a serverless environment and have them start up in milliseconds? Of course, you do! In this talk, Josh Long and Matt Raible will introduce you to Spring Native. They'll teach you all about how it can compile Spring Boot apps into native binaries that start faster than a speeding bullet! You'll learn about native testing support with JUnit 5 and the pros and cons of native vs JVM deployments. This talk will also highlight a customer, the JHipster project. JHipster generates Spring Boot-based monoliths and microservices. You'll learn about the project's experience with Spring Boot, Spring Cloud, Spring WebFlux, and Spring Native. It ain't easy being a Java Hipster, but the Spring ecosystem does simplify the process quite a bit. Recording on YouTube: https://youtu.be/k6nBB8FOmQ8 Examples on GitHub: https://github.com/mraible/spring-native-examples Writeup on LinkedIn: https://www.linkedin.com/pulse/jhipster-works-spring-native-part-2-matt-raible/

Java REST API Framework Comparison - PWX 2021Matt Raible

Use Spring Boot! No, use Micronaut!! Nooooo, Quarkus is the best!!! There's a lot of developers praising the hottest, and fastest, Java REST frameworks: Micronaut, Quarkus, and Spring Boot. In this session, you'll learn how to do the following with each framework: ✅ Build a REST API ✅ Secure your API with OAuth 2.0 ✅ Optimize for production with Docker and GraalVM I'll also share some performance numbers and pretty graphs to compare community metrics. Related blog post: https://developer.okta.com/blog/2021/06/18/native-java-framework-comparison

Web App Security for Java Developers - PWX 2021Matt Raible

Web app security is not just authentication and authorization. It's also the things you do to protect your web app from attackers with their XSS (cross-site scripting), SQL injection, DoS/DDoS attacks, and CSRF (cross-site request forgery), to name a few. Web app security is a central component of any web-based business. The internet exposes web apps to attacks from different locations and various levels of scale and complexity. Web application security deals specifically with the security surrounding websites, web applications, and web services such as APIs. In this presentation, you'll learn seven ways to better web app security, using Spring Security for code samples. You'll also see some quick demos of Spring Boot, Angular, and JHipster with Keycloak, Auth0, and Okta.

Mobile App Development with Ionic, React Native, and JHipster - Connect.Tech ...Matt Raible

Mobile development offers a lot of options. To develop native apps, you can use Java or Kotlin on Android. On iOS, you can use Objective C or Swift. There are other options, too. You can build hybrid mobile apps and Progressive Web Apps (PWAs). Hybrid mobile apps are those created with web technologies (HTML, JavaScript, and CSS) that look like native apps. PWAs have the ability to work offline and act like mobile apps. In this talk, we'll explore a few different mobile technologies: PWAs, React Native, and Ionic (with Angular). You'll walk away with knowledge of how to build mobile + Spring Boot apps in minutes with JHipster. * GitHub repo: https://github.com/mraible/mobile-jhipster * Demo script: https://github.com/mraible/mobile-jhipster/blob/main/demo.adoc

Lock That Shit Down! Auth Security Patterns for Apps, APIs, and Infra - Joker...Matt Raible

Web App Security for Java Developers - UberConf 2021Matt Raible

Java REST API Framework Comparison - UberConf 2021Matt Raible

Native Java with Spring Boot and JHipster - SF JUG 2021Matt Raible

Do you want to deploy your Spring Boot apps in a serverless environment and have them start up in milliseconds? Of course, you do! In this talk, Josh Long and Matt Raible will introduce you to Spring Native. They'll teach you all about how it can compile Spring Boot apps into native binaries that start faster than a speeding bullet! You'll learn about native testing support with JUnit 5 and the pros and cons of native vs JVM deployments. This talk will also highlight a customer, the JHipster project. JHipster generates Spring Boot-based monoliths and microservices. You'll learn about the project's experience with Spring Boot, Spring Cloud, Spring WebFlux, and Spring Native. It ain't easy being a Java Hipster, but the Spring ecosystem does simplify the process quite a bit. Recording on YouTube: https://youtu.be/F9oydL_MndA Examples on GitHub: https://github.com/mraible/spring-native-examples Writeup on LinkedIn: https://www.linkedin.com/pulse/jhipster-works-spring-native-matt-raible/

Lock That Shit Down! Auth Security Patterns for Apps, APIs, and Infra - Sprin...Matt Raible

In this session, you'll learn about recommended patterns for securing your backend APIs, the infrastructure they run on, and your SPAs and mobile apps. The world is no longer a place where you just need to secure your apps’ UI. You need to pay attention to your dependency pipeline and open source frameworks, too. Once you have the app built, with secure-by-design code, what about the cloud it runs on? Are the servers secure? What about the accounts you use to access them? If you lock all that sh*t down, how do you codify your solution so you can transport it cloud-to-cloud, or back to on-premises? This session will explore these concepts and many more!

Reactive Java Microservices with Spring Boot and JHipster - Denver JUG 2021Matt Raible

Microservice architectures are all the rage in JavaLand. They allow teams to develop services independently and deploy autonomously. Why microservices? IF you are developing a large/complex application AND you need to deliver it rapidly, frequently, and reliably over a long period of time THEN the Microservice Architecture is often a good choice Reactive architectures are becoming increasingly popular for organizations that need to do more, with less hardware. Reactive programming allows you to build systems that are resilient to high loads. In this session, I'll show you how to use JHipster to create a reactive microservices architecture with Spring Boot, Spring Cloud, Keycloak, and run it all in Docker. You will leave with the know-how to create your own resilient apps! Related blog post: https://developer.okta.com/blog/2021/01/20/reactive-java-microservices YouTube demo: https://youtu.be/clkEUHWT9-M YouTube recording: https://youtu.be/8OuZMFyh0xE GitHub repo: https://github.com/oktadev/java-microservices-examples/tree/main/reactive-jhipster

Get Hip with JHipster - Colorado Springs Open Source User Group 2021Matt Raible

JHipster is bad-ass. It's an Apache-licensed open source project that allows you to generate Spring Boot APIs and Angular (or React/Vue) apps. It has a vibrant community and ecosystem with support for deploying to many cloud providers and using the latest DevOps buzzwords, like Docker and K8s. This session will show you JHipster, why it's cool, and show you how to create an app with it. JHipster 7 Demo: https://www.youtube.com/watch?v=6lf64CctDAQ JHipster 7 Tutorial: https://github.com/mraible/jhipster7-demo#readme

JHipster and Okta - JHipster Virtual Meetup December 2020Matt Raible

YouTube video: https://www.youtube.com/watch?v=ym-OPn4e_nQ When I first started working at Okta, I refactored JHipster's OAuth support to move from authentication on the client to the server, leveraging Spring Security. This allowed for easier client integration since we didn't need to worry about finding an OIDC client for each frontend framework. Fast forward four years and JHipster's OAuth 2.0 and OIDC support is first-class! It uses Keycloak in a Docker container by default, but it's easy to switch to another identity provider (IdP) thanks to Spring Boot. Other blueprints like Micronaut, Quarkus, Node.js, and .NET support OAuth and OIDC too! This presentation explains what OAuth 2.0 and OIDC is, gives an overview of JHipster’s OAuth implementation, and provides three quick demos with Keycloak, the Okta CLI, and Heroku. See https://developer.okta.com/blog/tags/jhipster for Okta + JHipster tutorials and screencasts! 邏 You also might enjoy my What the Heck is OAuth? blog post: https://developer.okta.com/blog/2017/06/21/what-the-heck-is-oauth