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.thrift;
020
021import org.apache.yetus.audience.InterfaceAudience;
022
023/**
024 * Class used to create metrics sources for Thrift and Thrift2 servers.
025 */
026@InterfaceAudience.Private
027public class MetricsThriftServerSourceFactoryImpl implements MetricsThriftServerSourceFactory {
028
029  /**
030   * A singleton used to make sure that only one thrift metrics source per server type is ever
031   * created.
032   */
033  private enum FactoryStorage {
034    INSTANCE;
035    MetricsThriftServerSourceImpl thriftOne;
036    MetricsThriftServerSourceImpl thriftTwo;
037  }
038
039  @Override
040  public MetricsThriftServerSource createThriftOneSource() {
041    if (FactoryStorage.INSTANCE.thriftOne == null) {
042      FactoryStorage.INSTANCE.thriftOne = new MetricsThriftServerSourceImpl(METRICS_NAME,
043          METRICS_DESCRIPTION,
044          THRIFT_ONE_METRICS_CONTEXT,
045          THRIFT_ONE_JMX_CONTEXT);
046    }
047    return FactoryStorage.INSTANCE.thriftOne;
048  }
049
050  @Override
051  public MetricsThriftServerSource createThriftTwoSource() {
052    if (FactoryStorage.INSTANCE.thriftTwo == null) {
053      FactoryStorage.INSTANCE.thriftTwo = new MetricsThriftServerSourceImpl(METRICS_NAME,
054          METRICS_DESCRIPTION,
055          THRIFT_TWO_METRICS_CONTEXT,
056          THRIFT_TWO_JMX_CONTEXT);
057    }
058    return FactoryStorage.INSTANCE.thriftTwo;
059  }
060}