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  /**
22   * Class used to create metrics sources for Thrift and Thrift2 servers in hadoop 1's compat
23   * library.
24   */
25  public class MetricsThriftServerSourceFactoryImpl implements MetricsThriftServerSourceFactory {
26  
27    /**
28     * A singleton used to make sure that only one thrift metrics source per server type is ever
29     * created.
30     */
31    private static enum FactoryStorage {
32      INSTANCE;
33      MetricsThriftServerSourceImpl thriftOne = new MetricsThriftServerSourceImpl(METRICS_NAME,
34          METRICS_DESCRIPTION,
35          THRIFT_ONE_METRICS_CONTEXT,
36          THRIFT_ONE_JMX_CONTEXT);
37      MetricsThriftServerSourceImpl thriftTwo = new MetricsThriftServerSourceImpl(METRICS_NAME,
38          METRICS_DESCRIPTION,
39          THRIFT_TWO_METRICS_CONTEXT,
40          THRIFT_TWO_JMX_CONTEXT);
41    }
42  
43    @Override
44    public MetricsThriftServerSource createThriftOneSource() {
45      return FactoryStorage.INSTANCE.thriftOne;
46    }
47  
48    @Override
49    public MetricsThriftServerSource createThriftTwoSource() {
50      return FactoryStorage.INSTANCE.thriftTwo;
51    }
52  }