[ONOS-3535] Implement control metrics aggregation logic
Change-Id: I9953146851d5f3fdf7bcee9561fa86ddb7c7b3fe
diff --git a/apps/cpman/src/main/java/org/onosproject/cpman/ControlMetricsObserver.java b/apps/cpman/src/main/java/org/onosproject/cpman/ControlMetricsObserver.java
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index 0000000..dae5b0f
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+++ b/apps/cpman/src/main/java/org/onosproject/cpman/ControlMetricsObserver.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 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;
+
+import org.onosproject.net.DeviceId;
+
+import java.util.Optional;
+
+/**
+ * Control metrics observer interface.
+ */
+public interface ControlMetricsObserver {
+
+ /**
+ * Feeds the extracted value from MetricAggregator to back-end storage.
+ *
+ * @param metricsAggregator metric aggregator
+ * @param deviceId device id {@link org.onosproject.net.DeviceId}
+ */
+ void feedMetrics(MetricsAggregator metricsAggregator, Optional<DeviceId> deviceId);
+}