Spring + RabbitMQ basic configuration with topic exchange

SignupServiceApplication.java

package com.phoneservice.phoneservice;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class SignupServiceApplication {
    static final String EXCHANGE_NAME = "devpeer";
    static final String QUEUE_NAME = "signups";
    static final String SIGNUP_ROUTING_KEY_BASE = "signup";
    static final String SIGNUP_ROUTING_KEY_BINDING_PATTERN = SIGNUP_ROUTING_KEY_BASE + ".#";

    @Bean
    Queue queue() {
        return new Queue(QUEUE_NAME, false);
    }

    @Bean
    TopicExchange exchange() {
        return new TopicExchange(EXCHANGE_NAME);
    }

    @Bean
    Binding binding(Queue queue, TopicExchange exchange) {
        return BindingBuilder.bind(queue).to(exchange).with(SIGNUP_ROUTING_KEY_BINDING_PATTERN);
    }

    @Bean
    ConnectionFactory connectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        // Connect to RabbitMQ server with URI
        connectionFactory.setUri("amqp://guest:guest@localhost:5672/%2F");
        return connectionFactory;
    }

    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate template = new RabbitTemplate(connectionFactory());
        template.setMessageConverter(jsonMessageConverter());
        return template;
    }

    @Bean
    public MessageConverter jsonMessageConverter() {
        return new Jackson2JsonMessageConverter();
    }

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