| /** |
| * |
| * 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.hbase.regionserver; |
| |
| import java.net.InetSocketAddress; |
| import java.util.List; |
| |
| import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.ServerName; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * Abstraction that allows different modules in RegionServer to update/get |
| * the favored nodes information for regions. |
| */ |
| @InterfaceAudience.Private |
| public interface FavoredNodesForRegion { |
| /** |
| * Used to update the favored nodes mapping when required. |
| * @param encodedRegionName |
| * @param favoredNodes |
| */ |
| void updateRegionFavoredNodesMapping(String encodedRegionName, List<ServerName> favoredNodes); |
| |
| /** |
| * Get the favored nodes mapping for this region. Used when the HDFS create API |
| * is invoked to pass in favored nodes hints for new region files. |
| * @param encodedRegionName |
| * @return array containing the favored nodes' InetSocketAddresses |
| */ |
| InetSocketAddress[] getFavoredNodesForRegion(String encodedRegionName); |
| } |