Can a spring boot @RestController be enabled/disabled using properties?

Question

Given a \"standard\" spring boot application with a @RestController, eg

@RestController
@RequestMapping(value = \"foo\", produces = \"applicatio         


        

Answer 1

In some case, the @ConditionalOnXXX cannot work, for example, depends on another bean instance to check condition. (XXXCondition class cannot invoke a bean).

In such case, register controller in Java configuration file.

See source code(Spring webmvc 5.1.6):

org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.isHandler(Class)

       @Override
       protected boolean isHandler(Class beanType) {
              return (AnnotatedElementUtils.hasAnnotation(beanType, Controller.class) ||
                           AnnotatedElementUtils.hasAnnotation(beanType, RequestMapping.class));
       }

Should add @RequestMapping annotation on type level for the controller bean. See:

@RequestMapping // Make Spring treat the bean as request hanlder
public class MyControllerA {
    @RequestMapping(path = { "/path1" })
    public .. restMethod1(...) {
  ........
    }
}

@RequestMapping // Make Spring treat the bean as request hanlder
public class MyControllerB {
    @RequestMapping(path = { "/path1" })
    public .. restMethod1(...) {
  ........
    }
}

@Configuration
public class ControllerConfiguration {

    /**
     *
     * Programmingly register Controller based on certain condition.
     *
     */
    @Bean
    public IMyController myController() {
        IMyController controller;
        if (conditionA) {
            cntroller = new MyControllerA();
        } else {
            controller = new MyControllerB();
        }
        return controller;
    }
}