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

Microservices for the Masses with Spring Boot, JHipster, and JWT - J-Spring 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.

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. Docker, ELK, Spring Cloud, Okta; there will be plenty of interesting demos to see!

Matt Raible

May 10, 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

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  2. "Do one thing and do it well."

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  3. 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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  4. start.spring.io

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

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  6. Spring Boot Demo

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  7. 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

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  8. JSON Web Tokens

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  9. 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();

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

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

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  12. JHipster by the numbers
    +250 contributors
    +6800 Github stars
    +480,000 installations
    +150 companies officially using it

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

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  14. What’s Generated?
    Spring Boot application
    Angular application
    Liquibase changelog files
    Configuration files

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  15. 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…

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

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  17. Microservices with JHipster

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

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  19. JHipster.next
    JHipster CLI
    gRPC Support
    React Support
    Spring 5 and Reactive
    Improved Kafka Support

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  20. Do one thing and do it well.
    Unix philosophy

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

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  22. 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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