Spring Cloud Spring Service Connector with RabbitMQ

Question

I use Spring cloud Spring service connector to connect Rabbitmq service on CloudFoundry.

public class CloudConfig extends AbstractCloudConfig {

    @Bean
    public ConnectionFactory rabbitFactory()
    {
         return connectionFactory().rabbitConnectionFactory();
    }
}

But I need to declare a CachingConnectionFactory and set its PublisherConfirms true. Because we need use publisherConfirm to check ack when we send message to queue. I have no idea about how to inject the connectionFactory which is got from cloud spring service connector. Or how we could handle this situation.

Answer 1

You can reconfigure the CCF created by the connector as follows:

@Bean
public SmartInitializingSingleton factoryConfigurer() {
    return new SmartInitializingSingleton() {

        @Autowired
        private CachingConnectionFactory connectionFactory;

        @Override
        public void afterSingletonsInstantiated() {
            this.connectionFactory.setPublisherConfirms(true);
        }
    };
}

You must be sure not to perform any RabbitMQ operations before the application context is fully initialized (which is best practice anyway).

Answer 2

The documentation includes examples of customizing details of the connection provided by Connectors.

In your case, you should be able to do something like this:

@Bean
public RabbitConnectionFactory rabbitFactory() {
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("publisherConfirms", true);

    RabbitConnectionFactoryConfig rabbitConfig = new RabbitConnectionFactoryConfig(properties);
    return connectionFactory().rabbitConnectionFactory(rabbitConfig);
}

Answer 3

This is RabbitTemplate

@Bean
public RabbitTemplate rabbitTemplate() {
    RabbitTemplate template = new RabbitTemplate(connectionFactory);
    template.setMandatory(true);
    template.setMessageConverter(new Jackson2JsonMessageConverter());
    template.setConfirmCallback((correlationData, ack, cause) -> {
        if (!ack) {
            System.out.println("send message failed: " + cause + correlationData.toString());
        } else {
            System.out.println("Publisher Confirm" + correlationData.toString());
        }
    });
    return template;
}

This is spring-cloud config:

@Bean
public ConnectionFactory rabbitConnectionFactory() {
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("publisherConfirms", true);
    RabbitConnectionFactoryConfig rabbitConfig = new RabbitConnectionFactoryConfig(properties);
    return connectionFactory().rabbitConnectionFactory(rabbitConfig);
}

When I use this sender to send message.The result is not expected.

@Component
public class TestSender {

@Autowired
private RabbitTemplate rabbitTemplate;

@Scheduled(cron = "0/5 * *  * * ? ")
public void send() {
System.out.println("===============================================================");
    this.rabbitTemplate.convertAndSend(EXCHANGE, "routingkey", "hello world",
            (Message m) -> {
                m.getMessageProperties().setHeader("tenant", "aaaaa");
                return m;
            }, new CorrelationData(UUID.randomUUID().toString()));
    Date date = new Date();
    System.out.println("Sender Msg Successfully - " + date);
}

}