Enable to query the control metrics from remote node

Change-Id: Ifef1c6eafd7cc79ed99be51f7faa26d97aeb2f67
diff --git a/apps/cpman/api/src/main/java/org/onosproject/cpman/ControlLoadSnapshot.java b/apps/cpman/api/src/main/java/org/onosproject/cpman/ControlLoadSnapshot.java
new file mode 100644
index 0000000..36e436a
--- /dev/null
+++ b/apps/cpman/api/src/main/java/org/onosproject/cpman/ControlLoadSnapshot.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2016-present 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 com.google.common.base.MoreObjects;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * A container class that is used to wrap the control metric response.
+ */
+public class ControlLoadSnapshot {
+
+    private final long latest;
+    private final long average;
+    private final long time;
+
+    /**
+     * Instantiates a new control metric response with given latest, average, time.
+     *
+     * @param latest latest value of control metric
+     * @param average average value of control metric
+     * @param time last logging time fo control metric
+     */
+    public ControlLoadSnapshot(long latest, long average, long time) {
+        this.latest = latest;
+        this.average = average;
+        this.time = time;
+    }
+
+    /**
+     * Returns latest value of control metric.
+     *
+     * @return latest value of control metric
+     */
+    public long latest() {
+        return latest;
+    }
+
+    /**
+     * Returns last logging time of control metric.
+     *
+     * @return last logging time of control metric
+     */
+    public long time() {
+        return time;
+    }
+
+    /**
+     * Returns average value of control metric.
+     *
+     * @return average value of control metric
+     */
+    public long average() {
+        return average;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(latest, average, time);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof ControlLoadSnapshot) {
+            final ControlLoadSnapshot other = (ControlLoadSnapshot) obj;
+            return Objects.equals(this.latest, other.latest) &&
+                    Objects.equals(this.average, other.average) &&
+                    Objects.equals(this.time, other.time);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        MoreObjects.ToStringHelper helper;
+        helper = toStringHelper(this)
+                .add("latest", latest)
+                .add("average", average)
+                .add("time", time);
+        return helper.toString();
+    }
+}