RabbitMQ交换机和队列不会自动创建

Question

我已经创建了一个新的Spring应用程序，它将向rabbitmq服务器推送消息。我的rabbitMQConfig java文件如下：

@Configuration
public class RabbitMQConfig {

    private static final Logger LOGGER = LoggerFactory.getLogger(RabbitMQConfig.class);

    @Value("${spring.rabbitmq.host}")
    private String SPRING_RABBITMQ_HOST;

    @Value("${spring.rabbitmq.port}")
    private int SPRING_RABBITMQ_PORT;

    @Value("${spring.rabbitmq.username}")
    private String SPRING_RABBITMQ_USERNAME;

    @Value("${spring.rabbitmq.password}")
    private String SPRING_RABBITMQ_PASSWORD;

    @Bean
    public RabbitTemplate rabbitTemplate(){
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory(SPRING_RABBITMQ_HOST,SPRING_RABBITMQ_PORT);
        connectionFactory.setUsername(SPRING_RABBITMQ_USERNAME);
        connectionFactory.setPassword(SPRING_RABBITMQ_PASSWORD);
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        rabbitTemplate.setExchange("my.controller.exchange");
        rabbitTemplate.setRoutingKey("my.controller.key");
        return rabbitTemplate;
    }

    @Bean
    DirectExchange exchange() {
            return new DirectExchange("my.controller.exchange", true, false);
    }

    @Bean
    public Queue queue() {
            return new Queue("my.controller", true);
    }

    @Bean
    Binding exchangeBinding(DirectExchange exchange, Queue queue) {
            return BindingBuilder.bind(queue).to(exchange).with("my.controller.key");
    }
}

以下是我如何将消息推送到队列中的方式:

@Service
public class RabbitPublisher {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    private static Logger LOGGER = Logger.getLogger(RabbitPublisher.class);

    public  Boolean  pushToMyQueue(HashMap<String, Object> message) {
        try {
            rabbitTemplate.convertAndSend("my.controller.exchange","my.controller.key",message);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            LOGGER.error("Error in pushing to my queue", e);
        }
        return false;
    }
}

由于RabbitMQ服务器上不存在交换机和队列，我期望它们会自动创建并推送消息。但是却出现了以下错误：

ERROR 18198 --- [168.201.18:5672] o.s.a.r.c.CachingConnectionFactory       : 
Channel shutdown: channel error; protocol method: #method<channel.close>
(reply-code=404, reply-text=NOT_FOUND - no exchange 
'my.controller.exchange' in vhost '/', class-id=60, method-id=40)

当我在服务器上手动创建交换机、队列并绑定它们时，消息成功推送了。如果我漏掉了什么，请告诉我。谢谢。

- Jayram Kumar

Answer 1

您需要添加一个RabbitAdmin @Bean。当连接第一次打开时，管理器将声明元素。

- Gary Russell

Answer 2

您需要按照以下方式添加AmqpAdmin管理bean，同时使用所需的连接工厂:

   @Bean(name = "pimAmqpAdmin")
    public AmqpAdmin pimAmqpAdmin(@Qualifier("defaultConnectionFactory") ConnectionFactory connectionFactory) {
        return new RabbitAdmin(connectionFactory);
    }

- enes.acikoglu