| /** |
| * 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.client; |
| |
| import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent; |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.client.backoff.ServerStatistics; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * Tracks the statistics for multiple regions |
| */ |
| @InterfaceAudience.Private |
| public class ServerStatisticTracker implements StatisticTrackable { |
| |
| private final ConcurrentHashMap<ServerName, ServerStatistics> stats = new ConcurrentHashMap<>(); |
| |
| @Override |
| public void updateRegionStats(ServerName server, byte[] region, RegionLoadStats currentStats) { |
| computeIfAbsent(stats, server, ServerStatistics::new).update(region, currentStats); |
| } |
| |
| public ServerStatistics getStats(ServerName server) { |
| return this.stats.get(server); |
| } |
| |
| public static ServerStatisticTracker create(Configuration conf) { |
| if (!conf.getBoolean(HConstants.ENABLE_CLIENT_BACKPRESSURE, |
| HConstants.DEFAULT_ENABLE_CLIENT_BACKPRESSURE)) { |
| return null; |
| } |
| return new ServerStatisticTracker(); |
| } |
| } |