/**
*
* 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.classification.InterfaceAudience;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.ServerName;
/**
* Abstraction that allows different modules in RegionServer to update/get
* the favored nodes information for regions.
*/
@InterfaceAudience.Private
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);
}