How to set custom name for RabbitMQ connection?

Question

It would be useful to be able to identify the RabbitMQ client by its connection name.

I'm using Spring Cloud Streams abstraction and with default settings I getting something like that:

How can I set a custom RabbitMQ connection name in my Spring Boot client?

---

EDIT

Spring Boot 1.7+

This is solution based on Gary Russell's answer:

@Configuration
public class MessagingConfiguration {
    private final String instanceId = UUID.randomUUID().toString().substring(0, 8); // TODO: Environment/Consul/Eureka
    private final String connectionNamePrefix;
    private AtomicInteger connectionNumber = new AtomicInteger(0);

    public MessagingConfiguration(@Value("${custom.rabbitmq.connection-name-prefix:SpringBootApp}") String connectionNamePrefix) {
        this.connectionNamePrefix = connectionNamePrefix;
    }

    private String generateConnectionName() {
        return connectionNamePrefix + '#' + instanceId + ':' +  connectionNumber.getAndIncrement();
    }

    @Bean
    public SmartInitializingSingleton reconfigureConnectionFactory(final AbstractConnectionFactory cf) {
        return () -> cf.setConnectionNameStrategy(f -> generateConnectionName());
    }
}

It works with the default configuration, but doesn't work for a multiple systems connection.

Spring Boot 2.0.1+

@Configuration
public class MessagingConfiguration {
    private final String instanceId = UUID.randomUUID().toString().substring(0, 8); // TODO: Environment/Consul/Eureka
    private final String connectionNamePrefix;
    private AtomicInteger connectionNumber = new AtomicInteger(0);

    public MessagingConfiguration(@Value("${custom.rabbitmq.connection-name-prefix:SpringBootApp}") String connectionNamePrefix) {
        this.connectionNamePrefix = connectionNamePrefix;
    }

    private String generateConnectionName() {
        return connectionNamePrefix + '#' + instanceId + ':' +  connectionNumber.getAndIncrement();
    }

    @Bean
    public ConnectionNameStrategy defineConnectionNameStrategy() {
        return connectionFactory -> generateConnectionName();
    }
}

Note, there is a bug in a multi-binder scenario.

Answer 1

Starting with version 2.0 1.7 (see the documentation) you can provide a ConnectionNameStrategy...

@Bean
public CachingConnectionFactory connectionFactory() {
    CachingConnectionFactory cf = new CachingConnectionFactory("localhost");
    cf.setConnectionNameStrategy(f -> "myConnectionName");
    return cf;
}

EDIT

The strategy can be set any time before the connection is opened. If, say, you want to use Spring Boot's auto configured factory (which is used by Spring Cloud Stream by default), you could do something like this...

@Bean
public SmartInitializingSingleton reconfigureCf(final CachingConnectionFactory cf) {
    return () -> cf.setConnectionNameStrategy(f -> "myName");
}

This will be run before anything is start()ed.

Actually it was backported to 1.7.x.