[ONOS-3535] Accumulate control message stats using monitor service

- Augment the control message class to have device id
- Initial implementation of accumulating control message stats
- Add more adpator for unit test
- Change Collection<ControlMessage> to Set<ControlMessage>
- Fix the arithmatic exception
- Fix some javadoc warnings

Change-Id: I2abaf0d91edca5419b26f1c5a69246bcdb9201bf
diff --git a/apps/cpman/app/src/test/java/org/onosproject/cpman/impl/message/ControlPlaneMonitorServiceAdaptor.java b/apps/cpman/app/src/test/java/org/onosproject/cpman/impl/message/ControlPlaneMonitorServiceAdaptor.java
new file mode 100644
index 0000000..85b361c
--- /dev/null
+++ b/apps/cpman/app/src/test/java/org/onosproject/cpman/impl/message/ControlPlaneMonitorServiceAdaptor.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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.cpman.impl.message;
+
+import org.onosproject.cluster.NodeId;
+import org.onosproject.cpman.ControlLoad;
+import org.onosproject.cpman.ControlMetric;
+import org.onosproject.cpman.ControlMetricType;
+import org.onosproject.cpman.ControlPlaneMonitorService;
+import org.onosproject.cpman.ControlResource;
+import org.onosproject.net.DeviceId;
+
+import java.util.Optional;
+import java.util.Set;
+
+/**
+ * Test adapter control plane monitoring service.
+ */
+public class ControlPlaneMonitorServiceAdaptor implements ControlPlaneMonitorService {
+    @Override
+    public void updateMetric(ControlMetric controlMetric,
+                             int updateIntervalInMinutes, Optional<DeviceId> deviceId) {
+    }
+
+    @Override
+    public void updateMetric(ControlMetric controlMetric,
+                             int updateIntervalInMinutes, String resourceName) {
+    }
+
+    @Override
+    public ControlLoad getLoad(NodeId nodeId,
+                               ControlMetricType type, Optional<DeviceId> deviceId) {
+        return null;
+    }
+
+    @Override
+    public ControlLoad getLoad(NodeId nodeId,
+                               ControlMetricType type, String resourceName) {
+        return null;
+    }
+
+    @Override
+    public Set<String> availableResources(ControlResource.Type resourceType) {
+        return null;
+    }
+}