[VOL-4246] Feature parity with the previous implementation

Change-Id: I3741edb3c1b88b1cf8b5e6d4ff0900132e2e5e6a
diff --git a/impl/src/main/java/org/opencord/olt/cli/ShowProgrammedMeters.java b/impl/src/main/java/org/opencord/olt/cli/ShowProgrammedMeters.java
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@@ -0,0 +1,53 @@
+/*
+ * Copyright 2021-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.opencord.olt.cli;
+
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.net.DeviceId;
+import org.opencord.olt.impl.MeterData;
+import org.opencord.olt.impl.OltMeterServiceInterface;
+
+import java.util.Map;
+/**
+ * Displays the programmed meters through the OLT app.
+ */
+@Service
+@Command(scope = "onos", name = "volt-programmed-meters",
+        description = "Shows information about programmed meters, including the relation with the Bandwidth Profile")
+public class ShowProgrammedMeters extends AbstractShellCommand {
+
+    @Override
+    protected void doExecute() {
+        OltMeterServiceInterface service = AbstractShellCommand.get(OltMeterServiceInterface.class);
+        Map<DeviceId, Map<String, MeterData>> meters = service.getProgrammedMeters();
+        if (meters.isEmpty()) {
+            print("No meters programmed by the olt app");
+            return;
+        }
+        meters.forEach(this::display);
+    }
+
+    private void display(DeviceId deviceId, Map<String, MeterData> data) {
+        print("deviceId=%s, meterCount=%d", deviceId, data.size());
+        data.forEach((bp, md) ->
+                print("\tmeterId=%s bandwidthProfile=%s status=%s",
+                        md.getMeterId(), bp, md.getMeterStatus()));
+
+    }
+}
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