Springboot: show registered mappings - spring-boot

Question

I have created simple spring boot application using spring initilzr. POM is:
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
then I add simple controller which returns string 'hello'. Endpoint works and I am happy but I would like to have all registered mappings in log during starting application. How to achieve that?

Answer 1

One way could be to use Spring Boot Actuator to monitor the application mappings.
You will then be able to monitor the data either with JMX or HTTP.
How to :
Add Spring Boot Actuator (see https://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-features.html#production-ready-enabling)
Add this dependency :
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
Expose the mappings (see https://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-features.html#production-ready-endpoints-exposing-endpoints)
2a. For HTTP :
Add this line to application.properties :
management.endpoints.web.exposure.include=info, health, mappings
Then check this endpoint : http://localhost:8080/actuator/mappings (JSON data)
2b. For JMX :
Add this line to application.properties :
spring.jmx.enabled=true
Then check the MBeans prefixed by org.springframework.boot, with VisualVM for example.