Spring @Transactional - Isolation Level

May 04, 2018

Spring `@Transactional` annotation is concise and powerful. To understand what's the best property setting for your use case in this annotation could be confusing if you don't clearly understand what transaction management key concepts are. In this s... Read more

Spring Data Substitutes ObjectMapper

Apr 27, 2018

Most of the times when we need a DTO mapping from our persistent entity, we would think of using an ObjectMapper. However, with the help of the Spring Data, you might not need an ObjectMapper. This lesson presents a solution to use Spring Data to rep... Read more

Java Servlet CORS Filter with Preflight Options

Apr 26, 2018

A CORS filter determines what types of access control header will be set for the server response to the client's request. However, when the resource being accessed is behind a security layer, in order to send the payload to the security filters, an ... Read more