/**
* 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);
}