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 */
018
019package org.apache.hadoop.hbase.master.balancer;
020
021import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
022import org.apache.yetus.audience.InterfaceAudience;
023
024/**
025 * Faced for exposing metrics about the balancer.
026 */
027@InterfaceAudience.Private
028public class MetricsBalancer {
029
030  private MetricsBalancerSource source = null;
031
032  public MetricsBalancer() {
033    initSource();
034  }
035  
036  /**
037   * A function to instantiate the metrics source. This function can be overridden in its 
038   * subclasses to provide extended sources
039   */
040  protected void initSource() {
041    source = CompatibilitySingletonFactory.getInstance(MetricsBalancerSource.class);
042  }
043
044  public void balanceCluster(long time) {
045    source.updateBalanceCluster(time);
046  }
047
048  public void incrMiscInvocations() {
049    source.incrMiscInvocations();
050  }
051
052  public void balancerStatus(boolean status) {
053    source.updateBalancerStatus(status);
054  }
055}