Segui um exemplo simples de configuração e execução do ActiveMQ incorporado com o Spring Boot (versão 1.4.X). Aqui está o link para o exemplohttps://spring.io/guides/gs/messaging-jms/

Minha turma está estruturada da seguinte forma:

@SpringBootApplication
@EnableJms
public class Application {

@Autowired
ConfigurableApplicationContext context;

@Bean
JmsListenerContainerFactory<?> myJmsContainerFactory(ConnectionFactory connectionFactory) {
    SimpleJmsListenerContainerFactory factory = new SimpleJmsListenerContainerFactory();
    factory.setConnectionFactory(connectionFactory);

    return factory;
}

@JmsListener(destination = "mailbox-destination", containerFactory = "myJmsContainerFactory")
public void receiveMessage(String message) {
    System.out.println("Message received: " + message);
    context.close();
}

public static void main(String[] args) throws Exception {
    FileSystemUtils.deleteRecursively(new File("active-data"));
    ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);

    JmsTemplate template = context.getBean(JmsTemplate.class);
    MessageCreator messageCreator = new MessageCreator() {
        public Message createMessage(Session session) throws JMSException {
            return session.createTextMessage("Test");
        }
    };
    template.send("mailbox-destination", messageCreator);
}
}

E build.gradle como abaixo:

apply plugin: 'java'
apply plugin: 'maven'

group = 'jms.activemq'
version = '0.0.1-SNAPSHOT'

description = """jms.activemq"""

sourceCompatibility = 1.5
targetCompatibility = 1.5

repositories {
     maven { url "http://repo.maven.apache.org/maven2" }
}
dependencies {
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-activemq', version:'1.4.0.RELEASE'
    testCompile(group: 'org.springframework.boot', name: 'spring-boot-starter-test', version:'1.4.0.RELEASE') {
exclude(module: 'commons-logging')
}
}

Tudo funciona bem até o momento (desde que eu deixe o application.properties vazio), mas se eu tentar configurar a URL do broker (para que clientes remotos possam se conectar) adicionando o seguinte ao arquivo application.properties:

spring.activemq.broker-url=tcp://localhost:61616
spring.activemq.user=admin
spring.activemq.password=admin

Eu recebo uma exceção:

2016-08-03 12:46:00.938  WARN 88180 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.jms.config.internalJmsListenerEndpointRegistry'; nested exception is org.springframework.jms.UncategorizedJmsException: Uncategorized exception occurred during JMS processing; nested exception is javax.jms.JMSException: Could not connect to broker URL: tcp://localhost:61616. Reason: java.net.ConnectException: Connection refused: connect
2016-08-03 12:46:00.939  INFO 88180 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
2016-08-03 12:46:00.945  INFO 88180 --- [           main] utoConfigurationReportLoggingInitializer :
org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.jms.config.internalJmsListenerEndpointRegistry'; nested exception is org.springframework.jms.UncategorizedJmsException: Uncategorized exception occurred during JMS processing; nested exception is javax.jms.JMSException: Could not connect to broker URL: tcp://localhost:61616. Reason: java.net.ConnectException: Connection refused: connect
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:874) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
at jms.activemq.Application.main(Application.java:37) [main/:na]
Caused by: org.springframework.jms.UncategorizedJmsException: Uncategorized exception occurred during JMS processing; nested exception is javax.jms.JMSException: Could not connect to broker URL: tcp://localhost:61616. Reason: java.net.ConnectException: Connection refused: connect
at org.springframework.jms.support.JmsUtils.convertJmsAccessException(JmsUtils.java:316) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.support.JmsAccessor.convertJmsAccessException(JmsAccessor.java:169) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.listener.AbstractJmsListeningContainer.start(AbstractJmsListeningContainer.java:273) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.config.JmsListenerEndpointRegistry.startIfNecessary(JmsListenerEndpointRegistry.java:243) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.config.JmsListenerEndpointRegistry.start(JmsListenerEndpointRegistry.java:206) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
... 12 common frames omitted
Caused by: javax.jms.JMSException: Could not connect to broker URL: tcp://localhost:61616. Reason: java.net.ConnectException: Connection refused: connect
at org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:36) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:373) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:303) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.ActiveMQConnectionFactory.createConnection(ActiveMQConnectionFactory.java:243) ~[activemq-client-5.13.4.jar:5.13.4]
at org.springframework.jms.support.JmsAccessor.createConnection(JmsAccessor.java:180) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.listener.AbstractJmsListeningContainer.createSharedConnection(AbstractJmsListeningContainer.java:413) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.listener.AbstractJmsListeningContainer.establishSharedConnection(AbstractJmsListeningContainer.java:381) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.listener.AbstractJmsListeningContainer.doStart(AbstractJmsListeningContainer.java:285) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.listener.SimpleMessageListenerContainer.doStart(SimpleMessageListenerContainer.java:210) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.jms.listener.AbstractJmsListeningContainer.start(AbstractJmsListeningContainer.java:270) ~[spring-jms-4.3.2.RELEASE.jar:4.3.2.RELEASE]
... 15 common frames omitted
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_92]
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) ~[na:1.8.0_92]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_92]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_92]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_92]
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_92]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_92]
at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_92]
at org.apache.activemq.transport.tcp.TcpTransport.connect(TcpTransport.java:525) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.tcp.TcpTransport.doStart(TcpTransport.java:488) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.util.ServiceSupport.start(ServiceSupport.java:55) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.AbstractInactivityMonitor.start(AbstractInactivityMonitor.java:168) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.InactivityMonitor.start(InactivityMonitor.java:52) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.WireFormatNegotiator.start(WireFormatNegotiator.java:72) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58) ~[activemq-client-5.13.4.jar:5.13.4]
at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:353) ~[activemq-client-5.13.4.jar:5.13.4]
... 23 common frames omitted 

Analisei alguns links e ainda não consigo determinar o que está causando o problema. Realmente apreciaria alguma visão ou material que possa ajudar.

Meu pensamento inicial era que o Spring Boot ler esses valores e usá-los para configurar o broker do ActiveMQ, mas, ao contrário, parece que usa esses valores para conectar-se ao broker (o broker já foi configurado com diferentes configurações). Como posso alterar a configuração do broker para que clientes externos (que não estejam executando com a mesma JVM que o broker) possam acessar o broker usando tcp: // localhost: 61616

ATUALIZAR:

Eu segui uma das maneiras de incorporar um corretor listadoaqui e capaz de incorporar um broker com o URL necessário e capaz de se conectar a ele. No entanto, parece que acabo tendo dois corretores, pois parece que o Spring Boot ainda segue em frente e cria um como antes.

Basicamente, estou apenas adicionando esse pedaço de código e no início do método principal antes de chamar SpringApplication.run (Application.class, args);

BrokerService broker = new BrokerService();
broker.addConnector("tcp://localhost:61617");
broker.setPersistent(false);
broker.start();

Não parece certo, ter duas instâncias do broker (acredito) em execução.

1) Essa é a maneira correta de incorporar um corretor

2) Em caso afirmativo, como posso impedir que o Spring Boot inicie outro? (Sem precisar remover a dependência do spring-boot-starter-activemq).

Desde já, obrigado.