001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to you under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.hadoop.hbase.master;
018
019import org.apache.yetus.audience.InterfaceAudience;
020
021/**
022 * Factory to create MetricsMasterQuotaSource instances when given a MetricsMasterWrapper.
023 */
024@InterfaceAudience.Private
025public class MetricsMasterQuotaSourceFactoryImpl implements MetricsMasterQuotaSourceFactory {
026
027  private MetricsMasterQuotaSource quotaSource;
028
029  @Override
030  public synchronized MetricsMasterQuotaSource create(MetricsMasterWrapper masterWrapper) {
031    if (quotaSource == null) {
032      quotaSource = new MetricsMasterQuotaSourceImpl(masterWrapper);
033    }
034    return quotaSource;
035  }
036}