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.CompatibilitySingletonFactory;
021import org.apache.yetus.audience.InterfaceAudience;
022
023/**
024 * Faced for exposing metrics about the balancer.
025 */
026@InterfaceAudience.Private
027public class MetricsBalancer {
028
029  private MetricsBalancerSource source = null;
030
031  public MetricsBalancer() {
032    initSource();
033  }
034
035  /**
036   * A function to instantiate the metrics source. This function can be overridden in its subclasses
037   * to provide extended sources
038   */
039  protected void initSource() {
040    source = CompatibilitySingletonFactory.getInstance(MetricsBalancerSource.class);
041  }
042
043  public void balanceCluster(long time) {
044    source.updateBalanceCluster(time);
045  }
046
047  public void incrMiscInvocations() {
048    source.incrMiscInvocations();
049  }
050
051  public void balancerStatus(boolean status) {
052    source.updateBalancerStatus(status);
053  }
054}