Added a summary command.
diff --git a/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java b/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java
index 5fa92f3..833d6a6 100644
--- a/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java
+++ b/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java
@@ -57,6 +57,11 @@
 
 
     @Override
+    public int getFlowRuleCount() {
+        return flowEntries.size();
+    }
+
+    @Override
     public synchronized FlowEntry getFlowEntry(FlowRule rule) {
         for (FlowEntry f : flowEntries.get(rule.deviceId())) {
             if (f.equals(rule)) {