tablet-leader command to check current Raft leader
Change-Id: Id360db21988a50c3e2895c5194d59b0ba4cb49e4
diff --git a/cli/src/main/java/org/onlab/onos/cli/TabletLeaderCommand.java b/cli/src/main/java/org/onlab/onos/cli/TabletLeaderCommand.java
new file mode 100644
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+++ b/cli/src/main/java/org/onlab/onos/cli/TabletLeaderCommand.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2014 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.onlab.onos.cli;
+
+import org.apache.karaf.shell.commands.Command;
+import org.onlab.onos.cluster.ControllerNode;
+import org.onlab.onos.store.service.DatabaseAdminService;
+
+import java.util.Optional;
+
+/**
+ * Lists mastership roles of nodes for each device.
+ */
+@Command(scope = "onos", name = "tablet-leader",
+ description = "Prints the current leader of a tablet.")
+public class TabletLeaderCommand extends AbstractShellCommand {
+
+ @Override
+ protected void execute() {
+ final DatabaseAdminService dbAdminService = get(DatabaseAdminService.class);
+
+ Optional<ControllerNode> leader = dbAdminService.leader();
+ if (leader.isPresent()) {
+ print("Leader: %s", leader.get());
+ } else {
+ print("No Leader");
+ }
+ }
+}