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Spring Boot
Spring Boot is a framework that makes it easy to create stand-alone, production-grade Spring based applications that you can "just run". It allows you to create stand-alone applications, embed Tomcat/Jetty directly with no need to deploy WAR files, and provides starter POMs to simplify configuration. Spring Boot applications are run by adding a spring-boot-gradle-plugin and can then be run as an executable JAR. Features include REST endpoints, security, external configuration, and production monitoring via Actuators.
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Spring Boot
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- 2. Jaran Flaath • Seniorconsultant at Kodehuset • 12 years of professional software development experience • Frequent speaker • Previous leader of javaBin Sørlandet and VP of javaBin • When not coding: Building LEGO and driving R/C cars • http://twitter.com/jaranflaath
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- 6. What is Spring? Modularapplication framework assisting with almost any aspect of modern application development
- 7. What is Spring? Modularapplication framework assisting with almost any aspect of modern application development
- 8. What is SpringBoot?
- 9. Spring Boot makesit easy to create stand-alone, production-grade Spring based Applications that you can "just run". What is Spring Boot?
- 10. Spring Boot makesit easy to create stand-alone, production-grade Spring based Applications that you can "just run". What is Spring Boot?
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- 12. • Create stand-aloneSpring applications
- 13. • Embed Tomcat,Jetty or Undertow directly (no need to deploy WAR files)
- 14. • Provide opinionated'starter' POMs to simplify your Maven or Gradle configuration
- 15. • Automatically configureSpring whenever possible
- 16. • Provide production-readyfeatures such as metrics, health checks and externalised configuration
- 17. • No codegeneration or XML configuration
- 18. Maven and Gradlesupport via starter-artifacts • Provides a range of spring-boot-starter-* artifacts that contains what you need to get up and running fast • Customise when you need!
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- 21. Versions • Current stable:1.3.5 • Very soon arriving: 1.4.0 We will be using 1.3.5 for the demo today, but have a look at the new features in 1.4.0 towards the end.
- 22. Our goal • Createa REST web service with Spring Boot, Groovy and Gradle • Use case: A simple R/C Car registry!
- 23. What we willcover • Creating an application • Executable JAR • Custom banner (because they’re awesome) • Application configuration • Creating REST endpoints • Testing • Security • Actuators
- 24. Step 1: Createapplication and run it
- 25. Step 1: Takeaways •@SpringBootApplication-annotation: A convenience annotation combining @EnableAutoConfiguration, @Configuration and @ComponentScan • We start our application with SpringApplication.run()
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- 27. Step 2: Takeaways •Add spring-boot-gradle-plugin (or spring-boot-maven- plugin) • Application JAR can then be run as an executable If linked as a service from /etc/init.d you will be able to run the application as a daemon and use start, stop and status arguments
- 28. Step 3: Custombanner
- 29. Step 3: Takeaways •Well… It is very cool!
- 30. Step 4: Applicationconfiguration
- 31. Step 4: Takeaways •Configuration provided with @Configuration annotated class(es) • Provide beans using @Bean annotated methods Configuration properties can be declared using .properties or .yaml files both in- and outside your application http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-external-config-application-property-files
- 32. Step 5: Serviceendpoint
- 33. Step 5: Takeaways •Add endpoints with @RestController and @RequestMapping annotations • No further configuration needed
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- 35. Step 6: Takeaways •Easy testing of endpoints using RestTemplate • Point your integration test to your application using @SpringApplicationConfiguration(AppClass.class) • Configure random testing port using @WebIntegrationTest(randomPort = true) and obtain the port using @Value('${local.server.port}')
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- 37. Step 7: Takeaways •Simply adding spring-security to class path enables security • @EnableWebSecurity disables default configuration and allows us to customise security • Extend WebSecurityConfigurerAdapter to customise security
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- 39. Step 8: Takeaways •Use TestRestTemplate for additional functionality in a test context NOTE: Disabling CSRF should only be done for quick testing and prototyping
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- 41. Step 9: Takeaways •Actuators are a set of endpoints exposing useful information and controls for your application Full list of Actuators: http://docs.spring.io/spring-boot/docs/1.3.3.RELEASE/ reference/htmlsingle/#production-ready-endpoints
- 42. What’s new in1.4.0?
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- 44. New test annotation •@SpringBootTest with parameters is used instead of @SpringApplicationConfiguration, @IntegrationTest and @WebIntegrationTest • @LocalServerPort for injecting the port of the web server used during test
- 45. Upgraded dependencies • Basedon Spring 4.3 • Default JPA persistence provider is Hibernate 5, up from 4.3
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- 47. New annotation formocking existing beans • @MockBean for mocking existing beans in your application • @SpyBean for spying existing beans
- 48. • See therest here: https://github.com/spring-projects/spring-boot/wiki/ Spring-Boot-1.4-Release-Notes
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- 51. Thank you! twitter.com/jaranflaath jaran.flaath@gmail.com ImageCC BY-SA 4.0 Ashashyou (https://commons.wikimedia.org/wiki/User:Ashashyou)