AbstractAjaxTimerBehavior stop and restart using buttons - ajax

Question

timer= new AbstractAjaxTimerBehavior(Duration.seconds(4)) {
/**
*
*/
private static final long serialVersionUID = 1L;
#Override
protected void onTimer(AjaxRequestTarget target) {
List<Animal> newData = animalDaoImpl.getByCriteriaAndIdsAbove(
animal, lastId);
if (newData != null & newData.size() > 0) {
animals.getObject().addAll(newData);
}
target.add(animalWmc);
this.stop(target);
}
};
add(timer);
add(new AjaxLink<String>("start") {
private static final long serialVersionUID = 1L;
#Override
public void onClick(AjaxRequestTarget target) {
timer.restart(target);
}
});
Hi everyone.
above i have code that sets up a timer and stops it before it has a chance to start.
I then have a link which on click should restart the timer and then the timer should do it's thing.
However on click of the button the timer hits the database twice then stops for no reason. Can anyone shed some light on why this is happening. Thanks

Answer 1

Most simple solution (but sure not the best one):
Execute the code in onTimer depending on a boolean variable
#Override
protected void onTimer(AjaxRequestTarget target) {
if (executeTimer) {
// do your database stuff, ...
target.add(animalWmc);
}
}
and change the value for executeTimer in onClick(AjaxRequestTarget target)
#Override
public void onClick(AjaxRequestTarget target) {
executeTimer = true;
}