I haven’t found it on the Internet or at least it wasn’t easy, so I leave it here: How to create an embedded ActiveMQ Broker which is started with the application context, listens on a given TCP port and is configured in Java Config @Configuration class.

@Configuration
public class AppConfig {

    public static final String BROKER_URL = "tcp://localhost:6060";

    @Bean
    public BrokerService broker() throws Exception {
        BrokerService brokerService = new BrokerService();
        brokerService.addConnector(new URI(BROKER_URL));
        brokerService.setPersistent(false);
        return brokerService;
    }
}