Added xmpp.muc.unload.empty_days system property so admins can configure the...

Added xmpp.muc.unload.empty_days system property so admins can configure the number of empty days before unloading the room. JM-235

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@3433 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/wildfire/muc/spi/MultiUserChatServerImpl.java

@@ -730,6 +730,15 @@ public class MultiUserChatServerImpl extends BasicModule implements MultiUserCha
                 Log.error("Wrong number format of property xmpp.muc.tasks.log.batchsize", e);
             }
         }
+        value = JiveGlobals.getProperty("xmpp.muc.unload.empty_days");
+        if (value != null) {
+            try {
+                emptyLimit = Integer.parseInt(value) * 24;
+            }
+            catch (NumberFormatException e) {
+                Log.error("Wrong number format of property xmpp.muc.unload.empty_days", e);
+            }
+        }
         if (chatServiceName == null) {
             chatServiceName = "conference";
         }