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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.thrift;
20  
21  import org.apache.hadoop.classification.InterfaceAudience;
22  
23  /**
24   * Class used to create metrics sources for Thrift and Thrift2 servers.
25   */
26  @InterfaceAudience.Private
27  public class MetricsThriftServerSourceFactoryImpl implements MetricsThriftServerSourceFactory {
28  
29    /**
30     * A singleton used to make sure that only one thrift metrics source per server type is ever
31     * created.
32     */
33    private static enum FactoryStorage {
34      INSTANCE;
35      MetricsThriftServerSourceImpl thriftOne = new MetricsThriftServerSourceImpl(METRICS_NAME,
36          METRICS_DESCRIPTION,
37          THRIFT_ONE_METRICS_CONTEXT,
38          THRIFT_ONE_JMX_CONTEXT);
39      MetricsThriftServerSourceImpl thriftTwo = new MetricsThriftServerSourceImpl(METRICS_NAME,
40          METRICS_DESCRIPTION,
41          THRIFT_TWO_METRICS_CONTEXT,
42          THRIFT_TWO_JMX_CONTEXT);
43    }
44  
45    @Override
46    public MetricsThriftServerSource createThriftOneSource() {
47      return FactoryStorage.INSTANCE.thriftOne;
48    }
49  
50    @Override
51    public MetricsThriftServerSource createThriftTwoSource() {
52      return FactoryStorage.INSTANCE.thriftTwo;
53    }
54  }