Spring Cloud Spring Service Connector with RabbitMQ - spring-amqp

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

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 2

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 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);
}
}