Spring Boot

Scope

• Big environment wich is use to help us develop applications.
• if Spring MVC need configuration ? Spring Boot does it.
• Other jars needed to develop web applications ? there are starters allowing to easily build application
• Monitoring, and developer friendly tools
• Good integration with embeded servers: No need to develop a WAR file always, it is possible to develop a JAR and directly run it cause the Tomcat server is directly inside the JAR.

Comparaison with Spring Boot and Spring https://www.springboottutorial.com/spring-boot-vs-spring-mvc-vs-spring

What's new

Come with:

• Autoconfiguration
  • Previously (Spring_MVC) Bean, Resources, Servlet, View Resolver configuration
• Starters (Spring boot starter web ...)
  • Bring all the dependencis required to build web applications

Mock - Dependency Injection

<source lang="java">

@Component
public class WelcomeService {
  //Bla Bla Bla
}

@RestController
public class WelcomeController {

  @Autowired
  private WelcomeService service;

  @RequestMapping("/welcome")
  public String welcome() {
    return service.retrieveWelcomeMessage();
  }
}

</source>

Spring Boot Starter Project Options

Dependencies to use in pom.xml available to start faster a spring boot project.

spring-boot-starter-*:

• -web-services - SOAP Web Services
• -web - Web & RESTful applications
• -test - Unit testing and Integration Testing
• -jdbc - Traditional JDBC
• -hateoas - Add HATEOAS features to your services
• -security - Authentication and Authorization using Spring Security
• -data-jpa - Spring Data JPA with Hibernate
• -cache - Enabling Spring Framework’s caching support
• -data-rest - Expose Simple REST Services using Spring Data REST

Technical Stuff

spring-boot-starter-*:

• -actuator - To use advanced features like monitoring & tracing to your application out of the box
• -undertow, -jetty, -tomcat To pick your specific choice of Embedded Servlet Container
• -logging - For Logging using logback
• -log4j2 - Logging using Log4j2