| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 kafka.server |
| |
| import kafka.utils.Logging |
| |
| /** |
| * This trait defines a leader elector If the existing leader is dead, this class will handle automatic |
| * re-election and if it succeeds, it invokes the leader state change callback |
| */ |
| trait LeaderElector extends Logging { |
| def startup |
| |
| def amILeader : Boolean |
| |
| def elect: Boolean |
| |
| def close |
| } |
