可以使用自定义插件来解决这个问题。在自定义插件中，可以直接从BrokerService中获取目的地列表，并计算每个目的地的统计数据。以下是一个示例代码：

public class CustomStatisticsPlugin extends BrokerPlugin {
  
  private final Map destinationStats = new HashMap<>();

  @Override
  public Broker installPlugin(Broker broker) throws Exception {
    final ManagementContext managementContext = broker.getManagementContext();

    destinationStats.clear(); // make sure destinationStats is empty

    // register MBean listener to listen to destination creation events
    final DestinationInterceptor destinationInterceptor = new DestinationInterceptor() {
      @Override
      public Destination intercept(Destination destination) {
        // only intercept wildcard destinations
        if (destination instanceof DestinationFilter && ((DestinationFilter) destination).getDestination() == null) {
          final String destinationName = destination.getName();
          // create DestinationStatistics for new destination
          final DestinationStatistics stats = new DestinationStatistics();
          destinationStats.put(destinationName, stats);

          // register DestinationStatistics as MBean
          final ObjectName destinationObjectName = managementContext.createObjectName(destinationName);
          managementContext.registerMBean(stats, destinationObjectName);
        }
        return destination;
      }
    };

    // combine existing destination interceptor with custom destination interceptor
    final DestinationInterceptor[] interceptors = broker.getDestinationInterceptors();
    final DestinationInterceptor[] newInterceptors = new DestinationInterceptor[interceptors.length + 1];
    newInterceptors[0] = destinationInterceptor;
    System.arraycopy(interceptors, 0, newInterceptors, 1, interceptors.length);

    // install custom destination interceptor
    final BrokerService brokerService = broker.getBrokerService();
    brokerService.setDestinationInterceptors(newInterceptors);

    // create and register broker statistics MBean
    final BrokerStatistics brokerStats = new BrokerStatistics();
    final ObjectName brokerObjectName = managementContext.createObjectName("org.apache.activemq:type=Broker,brokerName=" + brokerService.getBrokerName());
    managementContext.registerMBean(brokerStats, brokerObjectName);

    // create and start ScheduledExecutorService to update statistics periodically
    final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
    final long updateInterval = 1000; // update statistics every second
    executorService.scheduleAtFixedRate(new Runnable() {
      @Override
      public void run() {
        for (Map.Entry entry : destinationStats.entrySet()) {
          final String destinationName = entry.getKey();
          final DestinationStatistics stats = entry.getValue();
          final Destination destination = brokerService.getDestination(destinationName);
          if (destination != null) {
            stats.update(destination);
          }
        }
        brokerStats.update(broker);
      }
    }, updateInterval, updateInterval, TimeUnit.MILLISECONDS);

    // store executorService in broker context so it can be stopped later
    brokerService.setContext(new BrokerContext() {
      @Override
      public void stop() {
        executorService.shutdown();
        try {
          executorService.awaitTermination(10, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
          Thread.currentThread().interrupt();
        }
      }

      @Override
      public void start() {
      }

      @Override
      public void init() {
      }
    });

    return broker;
  }
}

要使用此自定义插件，请将其添加到ActiveMQ配置文件中。以下是一个示例配置文件：

  
    com.example.CustomStatisticsPlugin
  

这将使用CustomStatisticsPlugin类作为自定义插件。