diff --git a/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/IFlowPusherService.java b/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/IFlowPusherService.java
index 94d6e35..570120f 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/IFlowPusherService.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/flowprogrammer/IFlowPusherService.java
@@ -13,6 +13,31 @@
 
 public interface IFlowPusherService extends IFloodlightService {
 	/**
+	 * Create a queue correspondent to the switch.
+	 * @param sw Switch to which new queue is attached.
+	 * @return true if new queue is successfully created.
+	 */
+	boolean createQueue(IOFSwitch sw);
+
+	/**
+	 * Delete a queue correspondent to the switch.
+	 * Messages remains in queue will be all sent before queue is deleted.
+	 * @param sw Switch of which queue is deleted.
+	 * @return true if queue is successfully deleted.
+	 */
+	boolean deleteQueue(IOFSwitch sw);
+	
+	/**
+	 * Delete a queue correspondent to the switch.
+	 * By setting force flag on, queue will be deleted immediately.
+	 * @param sw Switch of which queue is deleted.
+	 * @param force If this flag is on, queue will be deleted immediately
+	 *        regardless of any messages in the queue.
+	 * @return true if queue is successfully deleted.
+	 */
+	boolean deleteQueue(IOFSwitch sw, boolean force);
+	
+	/**
 	 * Add a message to the queue of the switch.
 	 * @param sw Switch to which message is pushed.
 	 * @param msg Message object to be added.
@@ -39,6 +64,13 @@
 	boolean add(IOFSwitch sw, IFlowPath flowObj, IFlowEntry flowEntryObj);
 
 	/**
+	 * Set sending rate to a switch.
+	 * @param sw Switch.
+	 * @param rate Rate in bytes/ms.
+	 */
+	public void setRate(IOFSwitch sw, long rate);
+	
+	/**
 	 * Add BARRIER message to queue and wait for reply.
 	 * @param sw Switch to which barrier message is pushed.
 	 * @return BARRIER_REPLY message sent from switch.