code: function(app, opts) {
    this.app = app;
    this.handlerMap = {};
    if(!!opts.reloadHandlers) {
      watchHandlers(app, this.handlerMap);
    }
  
    this.enableForwardLog = opts.enableForwardLog || false;
  }
docs: Handler service.
  Dispatch request to the relactive handler.
  
  @param {Object} app      current application context