| /* |
| * 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.cluster; |
| |
| /** |
| * Service for obtaining information about the leader election. |
| */ |
| public interface LeadershipService { |
| |
| /** |
| * Returns the current leader controller node. |
| * |
| * @return current leader controller node |
| */ |
| ControllerNode getLeader(); |
| |
| /** |
| * Adds the specified leadership event listener. |
| * |
| * @param listener the leadership listener |
| */ |
| void addListener(LeadershipEventListener listener); |
| |
| /** |
| * Removes the specified leadership event listener. |
| * |
| * @param listener the leadership listener |
| */ |
| void removeListener(LeadershipEventListener listener); |
| |
| } |