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.master.balancer;
019
020import org.apache.hadoop.hbase.RegionMetrics;
021import org.apache.hadoop.hbase.Size;
022import org.apache.yetus.audience.InterfaceAudience;
023import org.apache.yetus.audience.InterfaceStability;
024
025/**
026 * Wrapper class for the few fields required by the {@link StochasticLoadBalancer} from the full
027 * {@link RegionMetrics}.
028 */
029@InterfaceAudience.Private
030@InterfaceStability.Evolving
031class BalancerRegionLoad {
032  private final long readRequestsCount;
033  private final long cpRequestsCount;
034  private final long writeRequestsCount;
035  private final int memStoreSizeMB;
036  private final int storefileSizeMB;
037  private final int regionSizeMB;
038  private final float currentRegionPrefetchRatio;
039  private final float regionColdDataRatio;
040
041  BalancerRegionLoad(RegionMetrics regionMetrics) {
042    readRequestsCount = regionMetrics.getReadRequestCount();
043    cpRequestsCount = regionMetrics.getCpRequestCount();
044    writeRequestsCount = regionMetrics.getWriteRequestCount();
045    memStoreSizeMB = (int) regionMetrics.getMemStoreSize().get(Size.Unit.MEGABYTE);
046    storefileSizeMB = (int) regionMetrics.getStoreFileSize().get(Size.Unit.MEGABYTE);
047    regionSizeMB = (int) regionMetrics.getRegionSizeMB().get(Size.Unit.MEGABYTE);
048    currentRegionPrefetchRatio = regionMetrics.getCurrentRegionCachedRatio();
049    regionColdDataRatio = regionMetrics.getCurrentRegionColdDataRatio();
050  }
051
052  public long getReadRequestsCount() {
053    return readRequestsCount;
054  }
055
056  public long getCpRequestsCount() {
057    return cpRequestsCount;
058  }
059
060  public long getWriteRequestsCount() {
061    return writeRequestsCount;
062  }
063
064  public int getMemStoreSizeMB() {
065    return memStoreSizeMB;
066  }
067
068  public int getStorefileSizeMB() {
069    return storefileSizeMB;
070  }
071
072  public int getRegionSizeMB() {
073    return regionSizeMB;
074  }
075
076  public float getCurrentRegionCacheRatio() {
077    return currentRegionPrefetchRatio;
078  }
079
080  public float getRegionColdDataRatio() {
081    return regionColdDataRatio;
082  }
083}