Spring Boot - How to get the running port

Question

I have a spring boot application (using embedded tomcat 7), and I've set server.port = 0 in my application.properties so I can have a random port. After the server is booted up and running on a port, I need to be able to get the port that that was chosen.

I cannot use @Value("$server.port") because it's zero. This is a seemingly simple piece of information, so why can't I access it from my java code? How can I access it?

Answer 1

Is it also possible to access the management port in a similar way, e.g.:

  @SpringBootTest(classes = {Application.class}, webEnvironment = WebEnvironment.RANDOM_PORT)
  public class MyTest {

    @LocalServerPort
    int randomServerPort;

    @LocalManagementPort
    int randomManagementPort;