001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.regionserver.throttle; 019 020import org.apache.hadoop.conf.Configuration; 021import org.apache.hadoop.hbase.HBaseInterfaceAudience; 022import org.apache.hadoop.hbase.regionserver.RegionServerServices; 023import org.apache.hadoop.util.ReflectionUtils; 024import org.apache.yetus.audience.InterfaceAudience; 025import org.slf4j.Logger; 026import org.slf4j.LoggerFactory; 027 028@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) 029public final class FlushThroughputControllerFactory { 030 031 private static final Logger LOG = LoggerFactory.getLogger(FlushThroughputControllerFactory.class); 032 033 public static final String HBASE_FLUSH_THROUGHPUT_CONTROLLER_KEY = 034 "hbase.regionserver.flush.throughput.controller"; 035 036 private static final Class< 037 ? extends ThroughputController> DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS = 038 NoLimitThroughputController.class; 039 040 private FlushThroughputControllerFactory() { 041 } 042 043 public static ThroughputController create(RegionServerServices server, Configuration conf) { 044 Class<? extends ThroughputController> clazz = getThroughputControllerClass(conf); 045 ThroughputController controller = ReflectionUtils.newInstance(clazz, conf); 046 controller.setup(server); 047 return controller; 048 } 049 050 public static Class<? extends ThroughputController> 051 getThroughputControllerClass(Configuration conf) { 052 String className = conf.get(HBASE_FLUSH_THROUGHPUT_CONTROLLER_KEY, 053 DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS.getName()); 054 try { 055 return Class.forName(className).asSubclass(ThroughputController.class); 056 } catch (Exception e) { 057 LOG.warn("Unable to load configured flush throughput controller '" + className 058 + "', load default throughput controller " 059 + DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS.getName() + " instead", e); 060 return DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS; 061 } 062 } 063}