publish from gazebo

edit

hi guys, i want to publish from a gazebo plugin. How can i do that? In the same way as i publish from a common node? so do i have to write a main() and while{} and so on? I want to publish torque in order to plot it with rxplot. this is the part of the plugin:

torque.x = inertia.x *  controllers_.roll.update(roll_command, euler.x, angular_velocity.x, dt);
torque.y = inertia.y *  controllers_.pitch.update(pitch_command, euler.y, angular_velocity.y, dt);

body_->SetTorque(torque);

i try following, is this the right way?

ros::Publisher wrench_publisher;
geometry_msgs::Wrench moment;
int main(int argc, char **argv)
{
  ros::init(argc, argv, "hector_quadrotor_gazebo_plugins");
  ros::NodeHandle node_handle;
  ros::Rate loop_rate(100);
  wrench_publisher_ = node_handle.advertise<geometry_msgs::Wrench>("force", 1);
  while(ros::ok())
  {
  ros::spinOnce();
  moment.torque.x = torque.x ;
  moment.torque.y = torque.y;

  wrench_publisher.publish(moment);
  }
  return 0;
}