Book Image

Developing Java Applications with Spring and Spring Boot

By : Claudio Eduardo de Oliveira, Greg L. Turnquist, Alex Antonov
Book Image

Developing Java Applications with Spring and Spring Boot

By: Claudio Eduardo de Oliveira, Greg L. Turnquist, Alex Antonov

Overview of this book

Spring Framework has become the most popular framework for Java development. It not only simplifies software development but also improves developer productivity. This book covers effective ways to develop robust applications in Java using Spring. The course is up made of three modules, each one having a take-away relating to building end-to-end java applications. The first module takes the approach of learning Spring frameworks by building applications.You will learn to build APIs and integrate them with popular fraemworks suh as AngularJS, Spring WebFlux, and Spring Data. You will also learn to build microservices using Spring's support for Kotlin. You will learn about the Reactive paradigm in the Spring architecture using Project Reactor. In the second module, after getting hands-on with Spring, you will learn about the most popular tool in the Spring ecosystem-Spring Boot. You will learn to build applications with Spring Boot, bundle them, and deploy them on the cloud. After learning to build applications with Spring Boot, you will be able to use various tests that are an important part of application development. We also cover the important developer tools such as AMQP messaging, websockets, security, and more. This will give you a good functional understanding of scalable development in the Spring ecosystem with Spring Boot. In the third and final module, you will tackle the most important challenges in Java application development with Spring Boot using practical recipes. Including recipes for testing, deployment, monitoring, and securing your applications. This module will also address the functional and technical requirements for building enterprise applications. By the end of the course you will be comfortable with using Spring and Spring Boot to develop Java applications and will have mastered the intricacies of production-grade applications.
Table of Contents (34 chapters)
Title Page - Courses
Copyright and Credits - Courses
Packt Upsell - Courses

Logging reactive operations

So far, we have crafted a domain object for MongoDB, defined a reactive repository, and updated our ImageService to use it. If we fire things up, though, how can we see what's happening? Apart from viewing the web page, what can we expect to see in the console logs?

So far, this appears to be the most we get:

We see some log messages about connecting to an instance of MongoDB, but that's it! Not much there to debug things, ehh? Never fear, Spring Boot to the rescue.

Spring Boot comes with extensive logging support. Off the cuff, we can create a logback.xml file, and add it to our configuration in src/main/resources. Spring Boot will read it, and override its default logging policy. That's nice if we want to totally overhaul the log settings.

But often times, we just want to adjust some logging levels for specific packages. Spring Boot grants us a more fine-grained way to alter what gets logged.

Simply add this to src/main/resources/