Notify CacheListeners on calling refresh and removeAll (#51)

- Fix bug where 2 methods failed to notify appropriate CacheListeners.
- Enhance refresh() to accept vararg for the list of IDs to refresh.

gemini/src/main/java/com/techempower/cache/EntityStore.java

@@ -1029,14 +1029,24 @@ public <T extends Identifiable> T get(Class<T> type, String methodName, Object v
    * 
    * @param id the id of the object
    */
-  public void refresh(Class<? extends Identifiable> type, long id)
+  public void refresh(Class<? extends Identifiable> type, long... ids)
   {
-    getGroupSafe(type).refresh(id);
+    getGroupSafe(type).refresh(ids);
 
     final MethodValueCache<?> methodValueCache = methodValueCaches.get(type);
     if (methodValueCache != null)
     {
-      methodValueCache.update(id);
+      for (long id : ids) {
+        methodValueCache.update(id);
+      }
+    }
+
+    // Notify the listeners.
+    final CacheListener[] toNotify = listeners;
+    for (CacheListener listener : toNotify) {
+      for (long id : ids) {
+        listener.cacheObjectExpired(type, id);
+      }
     }
   }
 
@@ -1714,6 +1724,14 @@ public <T extends Identifiable> void removeAll(Collection<T> objects)
           methodValueCache.delete(id);
         }
       }
+
+      // Notify the listeners.
+      final CacheListener[] toNotify = listeners;
+      for (CacheListener listener : toNotify) {
+        for (long id : collection) {
+          listener.removeFromCache(type, id);
+        }
+      }
     }
   }