Java Spring guides

https://www.youtube.com/watch?v=WDlifgLS8iQ&list=PLU2ftbIeotGoGSEUf54LQH-DgiQPF2XRO&index=3


https://spring.io/guides/gs/rest-service/

https://spring.io/guides/gs/securing-web/

http://logging.apache.org/log4j/2.x/manual/configuration.html

https://attacomsian.com/blog/spring-boot-console-application

Spring Data JPA

Supported keywords inside method name: 
https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#jpa.query-methods.query-creation

https://spring.io/guides/gs/accessing-data-jpa/

https://spring.io/guides/gs/accessing-data-mysql/ 

https://attacomsian.com/blog/spring-data-jpa-one-to-many-mapping