[SDFAB-359] Allow purging flows, groups and meters by device and application ID

Change-Id: I5e507d230789979ac997dbc99697fa0483363f70
(cherry picked from commit cfd774018c0ed926873b1e171c106217cb2ac568)
diff --git a/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java b/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
index 2e632ed..811b418 100644
--- a/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
+++ b/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.net.meter;
 
+import org.onosproject.core.ApplicationId;
 import org.onosproject.net.DeviceId;
 import org.onosproject.store.Store;
 
@@ -196,9 +197,19 @@
 
     /**
      * Removes all meters of given device from store.
+     * This API is typically used when the device is offline.
      *
      * @param deviceId the device id
      */
     void purgeMeter(DeviceId deviceId);
 
+    /**
+     * Removes all meters of given device and for the given application from store.
+     * This API is typically used when the device is offline.
+     *
+     * @param deviceId the device id
+     * @param appId the application id
+     */
+    void purgeMeters(DeviceId deviceId, ApplicationId appId);
+
 }