Building a

Spring BootApplication(ask the audience)

Hanno Embregts @hannotify

Hanno?

IntroducingSpring Boot

Spring Boot?

( )

"Takes an opinionated view of buildingproduction-ready Spring applications.

Favors convention over con guration andis designed to get you up and running as

quickly as possible."

https://projects.spring.io/spring-boot

Key features?create stand-alone Spring applicationsembed web server directly (no WAR les)automatic Spring con guration whereverpossibleno code generation and no XML con gurationstill offering all Spring features.

Pros?no separate web server neededbetter debugging in IDEsfaster deployments (about 50%)no web.xml or con guration classes needed

up and running with one Java le and a buildscript.

( )https://www.ethode.com/blog/6-simple-reasons-why-spring-boot-rocks

Cons?custom con guration will be a bit of a puzzle

porting your legacy Spring project would be adisaster!

it uses Spring, excluding roughly half of the Javacommunity.

Starting Out

About What We ClaimedEarlier...

"up and running with one Java le and abuild script"

Java le(s)// imports...

@RestController public class HelloController {

@RequestMapping("/") public String index() { return "Greetings from Spring Boot!"; } }

// imports...

@SpringBootApplication public class Application {

public static void main(String[] args) { SpringApplication.run(Application.class, args); } }

Build scriptapply plugin: 'java' apply plugin: 'idea' apply plugin: 'org.springframework.boot'

jar { // some properties... }

// repositories...

dependencies { compile("org.springframework.boot:spring-boot-starter-web") testCompile("junit:junit") }

Starter Dependenciesa set of convenient dependency descriptorsfollow the naming pattern spring-boot-starter-*

Name Purpose

spring-boot-starter Core starter, includes auto-con g & logging

spring-boot-starter-test Test starter, includes JUnit, Hamcrest & Mockito

spring-boot-starter-web Starter for Spring MVC Web applications

spring-boot-starter-data-jpa Spring Data with JPA

(more starters at )

https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#using-boot-starter

Spring Initializr(a quick way to download a project setup)

http://start.spring.io/

Live coding

Kahoot! #1

Kahoot! #2

Wrap-up &Questions

Wrap-upSpring Boot

gets you up & running quickly;assumes standard con guration for rapiddevelopment;plays nice with a wide range of frameworks;is up to the task no matter what choices you make.

And what if I prefer JavaEE?At least you can use embedded servers:

TomEE Embedded( )

Wild y Swarm ( )

Quick assembly with JBoss ShrinkWrap(

)

http://tomee.apache.org/advanced/tomee-embedded/index.html

http://wild y-swarm.io/

http://www.lordofthejars.com/2014/09/apache-tomee-shrinkwrap-javaee-boot-not.html

Any questions?

Thank you! ☺ You can contact me at:

@hannotify

hanno.embregts@infosupport.com