MemphisDJ/src/notification/AbstractEventGenerator.java

   1 package notification;
   2
   3 import java.util.ArrayList;
   4 import java.util.HashSet;
   5 import java.util.Set;
   6
   7 public class AbstractEventGenerator<T extends Listener> implements EventGenerator<T> {
   8
   9         public synchronized void registerListener(T listener) {
  10                 listeners.add(listener);
  11         }
  12
  13         public synchronized void removeListener(T listener) {
  14                 listeners.remove(listener);
  15         }
  16
  17         protected synchronized Iterable<T> listeners() {
  18                 return new ArrayList<T>(listeners);
  19         }
  20
  21         private volatile Set<T> listeners = new HashSet<T>();
  22 }