Summary

This chapter has explained the concept and importance of loggers and how they can help developers in debugging and maintaining applications. It has introduced Log4j2, a third-party framework for Spring Boot that offers several features, such as Appenders, Filters, and Markers, which can assist in categorizing and formatting log events for developers. It has also introduced the concept of SLF4J, which is an abstraction of logging frameworks that allows us to switch between different frameworks at runtime or deployment.

In the following chapter, we will learn about the concepts and integration of unit testing in our Spring Boot application.