Index: /opt/cafe-trunk/event/event-impl/impl/src/java/org/sakaiproject/event/impl/NotificationCache.java
===================================================================
--- /opt/cafe-trunk/event/event-impl/impl/src/java/org/sakaiproject/event/impl/NotificationCache.java	(revision 38962)
+++ /opt/cafe-trunk/event/event-impl/impl/src/java/org/sakaiproject/event/impl/NotificationCache.java	(working copy)
@@ -118,7 +118,7 @@
 	 *        The cache key.
 	 * @return true if the key maps to an entry, false if not.
 	 */
-	public boolean containsKey(Object key)
+	public boolean containsKey(String key)
 	{
 		return cache.containsKey(key);
 		
@@ -176,7 +176,7 @@
 	 *        The cache key.
 	 * @return The entry associated with the key, or null if the a null is cached, or the key is not found (Note: use containsKey() to remove this ambiguity).
 	 */
-	public Notification get(Object key)
+	public Notification get(String key)
 	{
 		if (disabled()) return null;
 
@@ -373,7 +373,7 @@
 	 * @param key
 	 *        The cache key.
 	 */
-	public synchronized void remove(Object key)
+	public synchronized void remove(String key)
 	{
 		if (disabled()) return;