private void addObserver(Observer<D> observer) throws Exception {
// verify this observer doesn't already exist
if (observers.containsKey(observer.getName())) {
throw new Exception(
"Observer with name ["
+ observer.getName()
+ "] already exists (observer names MUST be unique)");
}
// add to list of observers as well as group
observers.put(observer.getName(), observer);
this.groups.addAll(observer.getConfiguration().getGroups());
}
