Spring Boot design principles and features incl. a hands on demo with Apache CXF

1. Spring Boot
quickstart
…with a little bit of Apache CXF
Jonas Hecht

2. 2
About me
Jonas Hecht,
Senior IT-Consultant
https://blog.codecentric.de/
author/jonas-hecht/
jonas.hecht@codecentric.de
@jonashackt
github.com/jonashackt

3. 3
I know Spring.
But what´s that Spring Boot thingy?

4. 4
https://spring.io/projects

5. 5
http://projects.spring.io/spring-boot
https://github.com/spring-projects/spring-boot
http://start.spring.io/
https://spring.io/blog/2016/07/28/spring-
boot-1-4-released
Where to start?

6. 6
Main design goals

7. 7
Picture: https://flic.kr/p/nZxKRM

8. 8
http://projects.spring.io/spring-boot/
“Spring Boot […] is designed
to get you up and running as
quickly as possible.”

9. 9
Picture: https://flic.kr/p/aD4qRA

10. 10
Spring Boot favors
convention over
configuration […].
http://projects.spring.io/spring-boot/

11. 11
And the details?

12. 12
Picture: https://flic.kr/p/qRbJHR

13. 13
Picture: https://flic.kr/p/cGmP7A

14. 14
Embedded Tomcat, Jetty…
Stand-alone
No need to deploy .war’s/.ear’s

15. 15
$ java -jar cxf-boot-simple-0.0.1-SNAPSHOT.jar!
or!
$ mvn spring-boot:run!
Stand-alone, no deployment

16. 16Picture: https://flic.kr/p/dwSu3Z

17. 17
'starter' POMs to simplify
Maven configuration

18. 18
! Batch, Messaging, Caching, Relational Databases, JPA,
NoSQL, whatever, Redis, Integration, Logging,
WebServices, Mail, Security, Webapps, REST,…
! official:
https://github.com/spring-projects/spring-boot/tree/
master/spring-boot-starters
! community:
https://github.com/spring-projects/spring-boot/tree/
master/spring-boot-starters#community-contributions
'starter' POMs

19. 19Picture: https://flic.kr/p/8Fyhn9

20. 20
Automatically configure
Spring whenever possible

21. 21
import org.springframework.boot.autoconfigure.condition.*;
@Configuration annotated Classes:
@Conditional
@ConditionalOnBean(YourClassHere.class)
@ConditionalOnProperty(“your.property.here“)
@ConditionalOnResource
...
Automatic configuration

22. 22Picture: https://flic.kr/p/6HgM6u

23. 23
Production-ready features
Metrics, health checks,
externalized configuration…

24. 24

25. 25
No code generation
No XML configuration!

26. 26
I want my own custom
Spring Boot Starter!

27. 27
Howto:
https://blog.codecentric.de/en/2014/11/extending-spring-boot-five-
steps-writing-spring-boot-starter/
Examples:
https://github.com/spring-projects/spring-boot/tree/master/spring-
boot-starters#community-contributions
https://github.com/codecentric/spring-boot-starter-batch-web
https://github.com/codecentric/cxf-spring-boot-starter
Custom Spring Boot Starters

28. 28
demo

29. 29
Complete Howto:
https://blog.codecentric.de/
2016/02/spring-boot-apache-cxf/
à http://start.spring.io/
group: de.codecentric.webservice
artifact: simpleservice
Web & Devtools
Demo: web service with Apache CXF 1/4
CXF-Dependencies
<!-- Apache CXF -->
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxws</artifactId>
<version>3.1.7</version>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-transports-http</artifactId>
<version>3.1.7</version>
</dependency>

30. 30
Demo: web service with Apache CXF 2/4
@Bean
public ServletRegistrationBean dispatcherServlet() {
return new ServletRegistrationBean(new CXFServlet(), "/soap-
api/*");
}
@Bean(name= Bus.DEFAULT_BUS_ID)
public SpringBus springBus() {
return new SpringBus();
}

31. 31
WSDL: https://github.com/jonashackt/weather-service-wsdl/
jaxws-maven-plugin config
see https://blog.codecentric.de/2016/02/spring-boot-apache-cxf/
http://cxf.apache.org/docs/jax-ws-configuration.html
Demo: web service with Apache CXF 3/4

32. 32
@Bean
public WeatherService weatherService() {
return new WeatherServiceEndpoint();
}
@Bean
public Endpoint endpoint() {
EndpointImpl endpoint = new EndpointImpl(springBus(), weatherService());
endpoint.publish("/WeatherSoapService_1.0");
return endpoint;
}
Demo: web service with Apache CXF 4/4

33. 33
Questions?
J