import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

/**

* Setter DI injection Hello World using Java annotation

*

* Created by vvedenin on 11/14/2015.

*/

public class SpringSetterAutowired {

public static class Notifier {

private NotificationService service;

@Autowired

public void setService(NotificationService service) {

this.service = service;

}

public void send(String message) {

service.send("email: " + message);

}

}

public static class EMailService implements NotificationService {

public void send(String message) {

System.out.println("I send " + message);

}

}

public interface NotificationService {

void send(String message);

}

@Configuration

public static class DIConfiguration {

@Bean

public Notifier getNotifier(NotificationService service){

return new Notifier();

}

@Bean

public NotificationService getNotificationService(){

return new EMailService();

}

}

public static void main(String[] args) throws Exception {

AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DIConfiguration.class);

Notifier notifier = context.getBean(Notifier.class);

notifier.send("Hello World!"); // Print "I send email: Hello World!"

}

}