@ConfigurationProperties(prefix="app-props") is not working in spring-boot

Question

application.yaml

app-props:
  uuidMap:
    customerId: "af241470-7a1a-41b9-8861-33c37069b8f2"
    resourceId: "213e8652-bb34-4709-bc4b-a3ad1587f619"

AppProps class:

@Component
@ConfigurationProperties(prefix="app-props")
public class AppProps
{
  private Map<String, String> uuidMap;

  public Map<String, String> getUuidMap() {
    return uuidMap;
  }

  public void setUuidMap(Map<String, String> uuidMap) {
    this.uuidMap = uuidMap;
  }
}

MyClass:

@Component
public class MyClass
{
  @Autowired
  private AppProps appProps;

  public void printInfo()
  {
    Map<String, String> uuidMap = appProps.getUuidMap();
    String customerId = uuidMap.get("customerId");
    System.out.println(customerId);
  }
}

Main class

@SpringBootApplication
@EnableConfigurationProperties
public class MainEntry  {
    public static void main(String[] args)
    {
      AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MainEntry.class);

      MyClass myClass = context.getBean(MyClass.class);
      myClass.printInfo();
      context.close();
    }
}

When running the main class, the myClass.uuidMap is null and I got:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.util.Map.get(Object)" because "uuidMap" is null at project1.MyClass.printInfo(MyClass.java:18) at project1.MainEntry.main(MainEntry.java:27)

How to fix this and get the member variable uuidMap populated with the data in application.yaml?

I noticed that there is a similar question @ConfigurationProperties prefix not working. But the difference is that I have the setter in AppProps, and The uuidMap is a map not just a String. Also, I got a warning Spring Boot Configuration Annotation Processor not configured in a red bar on my IntelliJ and I am not sure if that is related.

Answer 1

Thank you @M.Deinum. changing main class as below solved the problem

public class MainEntry  {
    public static void main(String[] args)
    {
AnnotationConfigApplicationContext(MainEntry.class);
      ConfigurableApplicationContext context = SpringApplication.run(MainEntry.class, args);
      MyClass myClass = context.getBean(MyClass.class);
      myClass.printInfo();
      context.close();
    }