Delve into creating REST APIs with Spring Framework, integrating databases with JPA, implementing Aspect-Oriented Programming, unit testing, and documenting with Springfox, and monitoring with Spring Boot Actuator.

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In this advanced-level course, you’ll learn to create REST APIs using the Spring Framework. The course gives a detailed experience in designing, implementing, and documenting REST APIs with end-to-end features like database integration and monitoring.

Firstly, you'll set up a Spring Boot project and create fully-functional REST APIs to manage your to-do lists. Secondly, you’ll learn database integration using Spring Data JPA and consume APIs using various tools such as cURL, Postman, and the Swagger UI. Thirdly, you'll learn Aspect-Oriented Programming (AOP) in Spring and Unit test the APIs using Spring Framework. Lastly, you’ll learn to document APIs using Springfox and Spring REST Docs and monitor them using the Spring Boot Actuator. 

By the end of this course, you'll be confident to design, implement, and document REST APIs end-to-end using the Spring Framework, including advanced topics like AOP, Unit Testing, and Monitoring.

REST APIs with Spring, JPA, and Springfox

Open the `TodoApplication` class in the `src/main/java/io/educative` package and check out the `@SpringBootApplication` annotation.

package io.educative;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class TodoApplication {

    public static void main(String[] args) {
        SpringApplication.run(TodoApplication.class, args);
    }

}



This annotation contains a combination of the following three primary annotations:

* The `@ComponentScan` annotation looks for components like controllers, services, and repositories to add them to the classpath.
* The `@SpringBootConfiguration` annotation enables the Spring container to generate bean definitions and serve those beans on runtime.
* The `@EnableAutoConfiguration` annotation does a lot of magic behind the scenes. It intelligently decides which auto-configurations to pick up (defined in the `spring.factories`) based on the classpath. 
For example, if it finds the H2 database in the classpath, it'll pick the auto-configuration for the H2 database and set it up with the default configurations.

To start the `todo` application, we can run the `TodoApplication` class as a Java application or use Gradle’s `bootRun` command.

Let’s explore the auto-configuration provided by Spring Boot and interact with the live app.

Introduction to Spring Boot

Develop REST APIs

Database Integration With Spring Data JPA

REST APIs With Spring Data REST

Aspect Oriented Programming

Spring Framework Testing

Consuming APIs

API Documentation With Swagger

API Documentation Using Spring REST Docs

Spring Boot Actuator

Wrapping Up

Configuration and Application Start-Up

SpringBootApplication annotation