Timer fires all at once

edit

I'm on Ubuntu 14.04 with ROS Indigo. I'm trying to repeat a published message for a few times, with some delay in between. It seemed that a ros::Timer was the tool for the job. However, I'm getting unexpected results. Instead of the timer calling the function once every ros::Duration(0.1), the repetitions are called instantly.

Here's some pseudo code to illustrate the program, I haven't the checked this code:

class MyClass{
  private:
    void myFunction();
    void myTimerCallback(const ros::TimerEvent& event)
    ros::NodeHandle nh_;
    ros::Timer *timer_;
  ...
}

void MyClass::myFunction(){
  ...
  timer_ = new ros::Timer(nh_.createTimer(
    ros::Duration(0.1),
    &MyClass::myTimerCallback, 
    this));
  ...
}

void MyClass::myTimerCallback(const ros::TimerEvent& event){
  // do stuff
}

int main(int argc, char **argv){
  ros::init(argc, argv, "pseudo_timer");
  MyClass my_class;
  ros::spin();
}

What I expect is that myTimerCallback is called once every 0.1 seconds, until I call timer_->stop(). However, what I see is that myTimerCallback is called the number of times I want it to be called in less than 0.001 seconds. In other words, there's no timing whatsoever.

Any ideas on what might be going wrong here?