| /** |
| * 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 org.apache.hadoop.ipc; |
| |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * Used to registry custom methods to refresh at runtime. |
| */ |
| @InterfaceStability.Unstable |
| public interface RefreshHandler { |
| /** |
| * Implement this method to accept refresh requests from the administrator. |
| * @param identifier is the identifier you registered earlier |
| * @param args contains a list of string args from the administrator |
| * @throws Exception as a shorthand for a RefreshResponse(-1, message) |
| * @return a RefreshResponse |
| */ |
| RefreshResponse handleRefresh(String identifier, String[] args); |
| } |