angular-vertxbus duplicate messages

app.js

/* global angular:false,console:false */
(function () {
  'use strict';

  angular.module('app', ['ng', 'knalli.angular-vertxbus'])
  .config(function(vertxEventBusProvider) {
    vertxEventBusProvider
    .useDebug(true)
    .useUrlServer('http://localhost:8080');
  })
  .run(function ($rootScope, vertxEventBus, vertxEventBusService, $interval) {
    $rootScope.sessionIsValid = false;
    $rootScope.$on('vertx-eventbus.system.login.succeeded', function (event, data) {
      console.log('Vert.X Login succeeded (status)', data);
      $rootScope.sessionIsValid = (data && data.status === 'ok');
    });
    $rootScope.$on('vertx-eventbus.system.login.failed', function (event, data) {
      console.log('Vert.X Login failed (status)', data);
      $rootScope.sessionIsValid = false;
    });

    $rootScope.$on('vertx-eventbus.system.connected', function(event, data) {
      var holder = {};
        holder.timeServiceDeconstructor = vertxEventBusService.on('what-time-is-it', function (data) {
          console.log("what time is it2 ");
        });
    });

    $rootScope.moduleStats = {
      wrapper: {},
      service: {}
    };
    $interval(function () {
      try {
        $rootScope.moduleStats.wrapper.readyState = vertxEventBus.readyState();
        $rootScope.moduleStats.service.readyState = vertxEventBusService.readyState();
        $rootScope.moduleStats.service.getConnectionState = vertxEventBusService.getConnectionState();
        $rootScope.moduleStats.service.isEnabled = vertxEventBusService.isEnabled();
        $rootScope.moduleStats.service.isConnected = vertxEventBusService.isConnected();
      } catch (e) {}
    }, 1000);
  })
  .filter('eventBusState', function () {
    var states = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED'];
    return function (value) {
      return states[value] || value;
    };
  })
  .controller('MyController', function($scope, vertxEventBusService) {
    $scope.login = function (username, password) {
      vertxEventBusService.login(username, password)
        .then(function (reply) {
          $scope.reply = reply;
        })
        ['catch'](function (reply) {
          $scope.reply = reply;
        });
    };


  });
}());