Added get DB object
diff --git a/src/main/java/net/onrc/onos/ofcontroller/floodlightlistener/NetworkGraphPublisher.java b/src/main/java/net/onrc/onos/ofcontroller/floodlightlistener/NetworkGraphPublisher.java
index 79ed3ed..c1dbe54 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/floodlightlistener/NetworkGraphPublisher.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/floodlightlistener/NetworkGraphPublisher.java
@@ -152,6 +152,7 @@
 
     protected void switchCleanup() {
     	//op.close();
+	op = GraphDBManager.getDBOperation("ramcloud", "/tmp/ramcloudconf");
     	Iterable<ISwitchObject> switches = op.getActiveSwitches();
     	
     	log.debug("Checking for inactive switches");