| /** |
| * 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.throttle; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.hbase.regionserver.RegionServerServices; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) |
| public final class CompactionThroughputControllerFactory { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(CompactionThroughputControllerFactory.class); |
| |
| public static final String HBASE_THROUGHPUT_CONTROLLER_KEY = |
| "hbase.regionserver.throughput.controller"; |
| |
| private CompactionThroughputControllerFactory() { |
| } |
| |
| private static final Class<? extends ThroughputController> |
| DEFAULT_THROUGHPUT_CONTROLLER_CLASS = PressureAwareCompactionThroughputController.class; |
| |
| // for backward compatibility and may not be supported in the future |
| private static final String DEPRECATED_NAME_OF_PRESSURE_AWARE_THROUGHPUT_CONTROLLER_CLASS = |
| "org.apache.hadoop.hbase.regionserver.compactions.PressureAwareCompactionThroughputController"; |
| private static final String DEPRECATED_NAME_OF_NO_LIMIT_THROUGHPUT_CONTROLLER_CLASS = |
| "org.apache.hadoop.hbase.regionserver.compactions.NoLimitThroughputController"; |
| |
| public static ThroughputController create(RegionServerServices server, |
| Configuration conf) { |
| Class<? extends ThroughputController> clazz = getThroughputControllerClass(conf); |
| ThroughputController controller = ReflectionUtils.newInstance(clazz, conf); |
| controller.setup(server); |
| return controller; |
| } |
| |
| public static Class<? extends ThroughputController> getThroughputControllerClass( |
| Configuration conf) { |
| String className = |
| conf.get(HBASE_THROUGHPUT_CONTROLLER_KEY, DEFAULT_THROUGHPUT_CONTROLLER_CLASS.getName()); |
| className = resolveDeprecatedClassName(className); |
| try { |
| return Class.forName(className).asSubclass(ThroughputController.class); |
| } catch (Exception e) { |
| LOG.warn( |
| "Unable to load configured throughput controller '" + className |
| + "', load default throughput controller " |
| + DEFAULT_THROUGHPUT_CONTROLLER_CLASS.getName() + " instead", e); |
| return DEFAULT_THROUGHPUT_CONTROLLER_CLASS; |
| } |
| } |
| |
| /** |
| * Resolve deprecated class name to keep backward compatibiliy |
| * @param oldName old name of the class |
| * @return the new name if there is any |
| */ |
| private static String resolveDeprecatedClassName(String oldName) { |
| String className = oldName.trim(); |
| if (className.equals(DEPRECATED_NAME_OF_PRESSURE_AWARE_THROUGHPUT_CONTROLLER_CLASS)) { |
| className = PressureAwareCompactionThroughputController.class.getName(); |
| } else if (className.equals(DEPRECATED_NAME_OF_NO_LIMIT_THROUGHPUT_CONTROLLER_CLASS)) { |
| className = NoLimitThroughputController.class.getName(); |
| } |
| if (!className.equals(oldName)) { |
| LOG.warn(oldName + " is deprecated, please use " + className + " instead"); |
| } |
| return className; |
| } |
| } |