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;
019
020import org.apache.yetus.audience.InterfaceAudience;
021import org.apache.hadoop.conf.Configuration;
022import org.apache.hadoop.hbase.regionserver.HeapMemoryManager.TunerContext;
023import org.apache.hadoop.hbase.regionserver.HeapMemoryManager.TunerResult;
024
025/**
026 * An implementation of HeapMemoryTuner which is not doing any tuning activity but just allows to
027 * continue with old style fixed proportions.
028 */
029@InterfaceAudience.Private
030public class NoOpHeapMemoryTuner implements HeapMemoryTuner {
031  
032  private static final TunerResult NO_OP_TUNER_RESULT = new TunerResult(false);
033
034  @Override
035  public Configuration getConf() {
036    return null;
037  }
038
039  @Override
040  public void setConf(Configuration conf) {
041
042  }
043
044  @Override
045  public TunerResult tune(TunerContext context) {
046    return NO_OP_TUNER_RESULT;
047  }
048}