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Microservices for the Masses with Spring Boot, JHipster, and JWT - Devoxx UK 2017

Microservices for the Masses with Spring Boot, JHipster, and JWT - Devoxx UK 2017

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.

You'll see how to 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!

Matt Raible

May 11, 2017

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  1. 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
  2. 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
  3. Securing Your API Choose the Right API Security Protocol Basic

    API Authentication with TLS (aka SSL) OAuth 1.0a, OAuth 2.0, OpenID Connect API Keys vs. Username/Password Authentication Store Your API Security Key securely Use globally unique IDs (e.g. Url62) Avoid sessions, especially in URLs
  4. 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();
  5. 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");
  6. JHipster by the numbers +250 contributors +6800 Github stars +480,000

    installations +150 companies officially using it
  7. How to use JHipster To install JHipster, you run an

    npm command: $ npm install -g generator-jhipster $ mkdir myapp && cd myapp $ yo jhipster
  8. 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…
  9. Microservices are not free, but you get a deep discount

    on microservices with JHipster. Matt Raible 2016
  10. 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