java - 在 RabbitMQ 中发布时提供不正确(不存在)的队列名称

Question

我正在使用 AyncRabbitTemplate 来发布消息。发布时提供不正确的(不存在的)队列名称 - 它会默默地删除消息。

我尝试在 AyncRabbitTemplate 上启用“确认”和“授权”，并添加了所需的回调方法，如下所示:

@Bean
AsyncRabbitTemplate template() {
    RabbitTemplate rabbit = rabbitTemplate();
    rabbit.setChannelTransacted(true);         //to throw error when channel shuts down in case of incorrect exchange names

    AsyncRabbitTemplate asyncRabbitTemplate = new AsyncRabbitTemplate(rabbit, rpcReplyMessageListenerContainer(connectionFactory()));
    asyncRabbitTemplate.setEnableConfirms(true);
    asyncRabbitTemplate.setMandatory(true);         //if the message cannot be delivered to a queue an AmqpMessageReturnedException will be thrown
    return asyncRabbitTemplate;
}

@Bean
public SimpleMessageListenerContainer rpcReplyMessageListenerContainer(ConnectionFactory connectionFactory) {
    SimpleMessageListenerContainer simpleMessageListenerContainer = new SimpleMessageListenerContainer(connectionFactory);
    simpleMessageListenerContainer.setQueueNames(Constants.REPLY_QUEUE);
    simpleMessageListenerContainer.setTaskExecutor(Executors.newCachedThreadPool());
    simpleMessageListenerContainer.setAcknowledgeMode(AcknowledgeMode.AUTO);
    return simpleMessageListenerContainer;
}

@Bean
public RabbitTemplate rabbitTemplate() {
    return new RabbitTemplate(connectionFactory());
}

@Bean
public ConnectionFactory connectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory("localhost");
    return connectionFactory;
}

回调方法为:

RabbitConverterFuture<String> future = this.asyncRabbitTemplate.convertSendAndReceive("",Constants.SNS_QUEUE, "This is the request message ",new MessagePostProcessor() {

        @Override
        public Message postProcessMessage(Message message) {
            message.getMessageProperties().setTimestamp(new Date());
            message.getMessageProperties().setMessageId(UUID.randomUUID().toString());
            return message;
        }
    });


    ListenableFuture<Boolean> future2 = future.getConfirm();
    future2.addCallback(new ListenableFutureCallback<Boolean>() {

        @Override
        public void onSuccess(Boolean result) {
            System.out.println("Publish Result " + result);

        }

        @Override
        public void onFailure(Throwable ex) {
            System.out.println("Publish Failed: " + ex);

        }
    });

Answer 1

如 the documentation 中所述您必须在连接工厂上启用返回消息。

发送不会引发异常，但无法送达的消息将返回到 ReturnCallback(如果强制为 true)。

对于无法送达的消息，不会发送确认。仅当经纪商存在某种问题时才会收到否定确认；它们很罕见。