Added a set of CLIs for update and enable/disable telemetry svc cfg

Change-Id: I518585f7941c98aa0479acc3583a0f1a751e6db9
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/cli/TelemetryServiceDisableCommand.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/cli/TelemetryServiceDisableCommand.java
new file mode 100644
index 0000000..13524d6
--- /dev/null
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/cli/TelemetryServiceDisableCommand.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2018-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.onosproject.openstacktelemetry.cli;
+
+import org.apache.karaf.shell.api.action.Argument;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.openstacktelemetry.api.TelemetryConfigAdminService;
+import org.onosproject.openstacktelemetry.api.config.TelemetryConfig;
+
+/**
+ * Disables a telemetry service.
+ */
+@Service
+@Command(scope = "onos", name = "telemetry-disable",
+        description = "Disable a specific telemetry service")
+public class TelemetryServiceDisableCommand extends AbstractShellCommand {
+
+    @Argument(index = 0, name = "config name", description = "telemetry config name",
+            required = true, multiValued = false)
+    @Completion(TelemetryConfigNameCompleter.class)
+    private String configName = null;
+
+    private static final String FORMAT = "Successfully disabled telemetry service %s!";
+    private static final String NO_ELEMENT =
+            "No telemetry config is found with the given name";
+
+    @Override
+    protected void doExecute() {
+        TelemetryConfigAdminService service = get(TelemetryConfigAdminService.class);
+        TelemetryConfig config = service.getConfig(configName);
+
+        if (config == null) {
+            print(NO_ELEMENT);
+            return;
+        }
+
+        TelemetryConfig updatedConfig = config.updateEnabled(false);
+
+        service.updateTelemetryConfig(updatedConfig);
+        print(FORMAT, config.name());
+    }
+}