/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.hdfs.server.federation.fairness;

import org.apache.hadoop.hdfs.server.federation.router.Router;
import org.apache.hadoop.ipc.RefreshHandler;
import org.apache.hadoop.ipc.RefreshResponse;

public class RefreshFairnessPolicyControllerHandler implements RefreshHandler {

  final static public String HANDLER_IDENTIFIER = "RefreshFairnessPolicyController";
  private final Router router;

  public RefreshFairnessPolicyControllerHandler(Router router) {
    this.router = router;
  }

  @Override
  public RefreshResponse handleRefresh(String identifier, String[] args) {
    if (HANDLER_IDENTIFIER.equals(identifier)) {
      return new RefreshResponse(0, router.getRpcServer().refreshFairnessPolicyController());
    }
    return new RefreshResponse(-1, "Failed");
  }
}