Hands-On Reactive Programming in Spring 5

Writing custom actuator endpoints

A Spring Boot actuator allows registering custom endpoints that will not only display data but also may update the application's behavior. For that purpose, a Spring bean should be decorated with an @Endpoint annotation. To register read/write operations as an actuator endpoint, the library provides @ReadOperation, @WriteOperation, and @DeleteOperation annotations that are in turn mapped to HTTP GET, POST, and DELETE respectively. Note though, generated REST endpoints consume and produce the following content type:application/vnd.spring-boot.actuator.v2+json, application/json.

To demonstrate how this feature can be used within the reactive application, let's create a custom endpoint that reports the current ...