org.apache.hadoop.hbase.client.ServerStatisticTracker Maven / Gradle / Ivy
/**
* 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.CollectionUtils.computeIfAbsent;
import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
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.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.client.backoff.ServerStatistics;
/**
* Tracks the statistics for multiple regions
*/
@InterfaceAudience.Private
public class ServerStatisticTracker implements StatisticTrackable {
private final ConcurrentHashMap 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();
}
@VisibleForTesting
ServerStatistics getServerStatsForTesting(ServerName server) {
return stats.get(server);
}
}