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 java.util.HashMap;
021import java.util.Map;
022
023public class DummyMetricsStochasticBalancer extends MetricsStochasticBalancer {
024  // We use a map to record those metrics that were updated to MetricsStochasticBalancer when
025  // running
026  // unit tests.
027  private Map<String, Double> costsMap;
028
029  public DummyMetricsStochasticBalancer() {
030    // noop
031  }
032
033  @Override
034  protected void initSource() {
035    costsMap = new HashMap<>();
036  }
037
038  @Override
039  public void balanceCluster(long time) {
040    // noop
041  }
042
043  @Override
044  public void incrMiscInvocations() {
045    // noop
046  }
047
048  @Override
049  public void balancerStatus(boolean status) {
050    // noop
051  }
052
053  @Override
054  public void updateMetricsSize(int size) {
055    // noop
056  }
057
058  @Override
059  public void updateStochasticCost(String tableName, String costFunctionName,
060    String costFunctionDesc, Double value) {
061    String key = tableName + "#" + costFunctionName;
062    costsMap.put(key, value);
063  }
064
065  public Map<String, Double> getDummyCostsMap() {
066    return this.costsMap;
067  }
068
069  /**
070   * Clear all metrics in the cache map then prepare to run the next test
071   */
072  public void clearDummyMetrics() {
073    this.costsMap.clear();
074  }
075
076}