MessagingApplication.java

package demo;

import org.springframework.amqp.core.AmqpAdmin;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class MessagingApplication {

	public static final String NOTIFICATIONS = "notifications";

	@Bean
	public InitializingBean prepareQueues(AmqpAdmin amqpAdmin) {
		return () -> {
			Queue queue = new Queue(NOTIFICATIONS, true);
			DirectExchange exchange = new DirectExchange(NOTIFICATIONS);
			Binding binding = BindingBuilder.bind(queue).to(exchange).with(NOTIFICATIONS);
			amqpAdmin.declareQueue(queue);
			amqpAdmin.declareExchange(exchange);
			amqpAdmin.declareBinding(binding);

		};
	}

	public static void main(String[] args) {
		SpringApplication.run(MessagingApplication.class, args);
	}

}