JavaEE workshop #9

Viktor Martiš

(spring-boot)

Previous workshop

  • IDEA shortcut: multicursor - Alt + J
  • Observer pattern
  • Web services
  • SOAP, WSDL
  • Spring-ws, soup-ui

Contents

  • IDEA shortcut (git commands): Ctrl + K, Ctrl + Shift +K,Alt + 9 
  • Design pattern: Chain of responsibility
  • spring-boot
  • lombok
  • spring-data-jpa

IDEA shortcut

  • IDEA shortcut:
    • Commit: Ctrl + K
    • Push:  Ctrl + Shift +K
    • Version control panel: Alt + 9

Chain of responsibility

  • comes under behavioral patterns
  • chain of receiver objects having the responsibility, depending on run-time conditions, to either handle a request or forward it to the next receiver on the chain
  • Real implementation: servlet filters

Spring boot

  • easy to create stand-alone, production-grade Spring based Applications
  • Run: java -jar XXX.jar
  • non-functional features:
    • embedded servers
    • security
    • metrics
    • health checks
    • externalized configuration
  • no code generation and non XML configuration

Spring boot

  • Stable version: 1.5.9, 2.0 RC
  • Servlet containers Tomcat [7,8], Jetty [9.2, 9.3]
  • Support Maven or Gradle
  • Java/Kotlin/Groovy

Spring-boot CLI

Starters

  • set of convenient dependency descriptors that you can include in your application
  • contain a lot of the dependencies

Configuration

  • Application class - place in root package
  • @EnableAutoConfiguration
  • @ComponentScan - default root package
  • @SpringBootApplication
    • @Configuration
    • @EnableAutoConfiguration
    • @ComponentScan

Running aps

Externalized configuration

Logging

  • By default Logback (other options JUL, LOG4J).
  • configuration in "application.properties"
  • console
  • file

Production ready

Lombok

  • Generation of getters, setters, constructos, toString, hashCode, ...
  • IntelliJ plugin
  • Other IDE plugins

Spring data JPA

Q&A