Packet throttle support

Change-Id: I6f2da5ed25f794561349013bfcbf9afa85d5e190
diff --git a/apps/packet-throttle/app/src/main/java/org/onosproject/packetthrottle/cli/PacketOverFlowStatsShowCommand.java b/apps/packet-throttle/app/src/main/java/org/onosproject/packetthrottle/cli/PacketOverFlowStatsShowCommand.java
new file mode 100644
index 0000000..2fd9192
--- /dev/null
+++ b/apps/packet-throttle/app/src/main/java/org/onosproject/packetthrottle/cli/PacketOverFlowStatsShowCommand.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.packetthrottle.cli;
+
+import org.apache.karaf.shell.api.action.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.net.packet.PacketInFilter;
+import org.onosproject.packetthrottle.api.PacketThrottleService;
+import java.util.Map;
+
+
+/**
+ * Displays the statistics of the packets dropped due to throttle.
+ */
+@Service
+@Command(scope = "onos", name = "pkt-stats-overflow-show",
+        description = "Displays the packet overflow statistics values")
+public class PacketOverFlowStatsShowCommand extends AbstractShellCommand {
+
+    private static final String FORMAT = "PacketType = %s, Count = %s";
+
+
+
+    @Override
+    protected void doExecute() {
+        PacketInFilter filter;
+        PacketThrottleService packetThrottleService = get(PacketThrottleService.class);
+        Map<String, PacketInFilter> filterMap = packetThrottleService.filterMap();
+        for (Map.Entry<String, PacketInFilter> entry: filterMap.entrySet()) {
+            filter = entry.getValue();
+            print(FORMAT, filter.name(), filter.droppedPackets());
+        }
+    }
+}