The best way to do batch processing with JPA and Hibernate

https://vladmihalcea.com/the-best-way-to-do-batch-processing-with-jpa-and-hibernate/

https://stackoverflow.com/questions/2773302/jpa-hibernate-bulkbatch-insert

Mysql clustering

https://shazi.info/%E6%9E%B6%E8%A8%AD-ha-%E9%AB%98%E5%8F%AF%E7%94%A8%E6%80%A7%EF%BC%9Amysql-cluster-%E5%8F%A2%E9%9B%86-7-4-115-6-29/

http://stackoverflow.max-everyday.com/2017/10/mysql-for-commercial/

http://www.clusterdb.com/mysql-cluster/using-clusterjpa-part-of-mysql-cluster-connector-for-java-a-tutorial

Easily secure your Spring Boot applications with Keycloak

https://developers.redhat.com/blog/2017/05/25/easily-secure-your-spring-boot-applications-with-keycloak/

How to use JPA correctly to avoid complaints of a slow application

https://zeroturnaround.com/rebellabs/how-to-use-jpa-correctly-to-avoid-complaints-of-a-slow-application/

Modified Java Script Value & Dynamic SQL

https://stackoverflow.com/questions/36918706/pentaho-insert-a-list-in-sql-where-clause

Spring Batch With Spring Boot

http://ashismo.github.io/java-spring/2017/05/16/Spring-Batch-with-Spring-Boot

Java Generic Type & get-put principle

https://stackoverflow.com/questions/1292109/explanation-of-the-get-put-principle