Asynchronous RequestHandler

package se.schildmeijer;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

public class Playground {

	@Retention(RetentionPolicy.RUNTIME)	
	@Target(ElementType.METHOD)
	@interface Asynchronous {
	}


	interface RequestHandler {

		void get();
	}

	static class AsyncRequestHandler implements RequestHandler {

		@Asynchronous
		public void get() { }

	}

	static class SyncRequestHandler implements RequestHandler {

		public void get() { }

	}

	public static void main(String[] args) throws SecurityException, NoSuchMethodException {
		RequestHandler arh = new AsyncRequestHandler();
		RequestHandler srh = new SyncRequestHandler();

		Asynchronous c1 = arh.getClass().getDeclaredMethod("get", null).getAnnotation(Asynchronous.class);
		Asynchronous c2 = srh.getClass().getDeclaredMethod("get", null).getAnnotation(Asynchronous.class);
		if (c1 != null) {
			System.out.println("asynch har @annotering");
		}
		if (c2 != null) {
			System.out.println("synch har @annotering");
		}
	}
}