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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  package org.apache.hadoop.hbase.ipc;
19  
20  import java.util.List;
21  
22  import org.apache.hadoop.conf.Configuration;
23  import org.apache.hadoop.hbase.CellScannable;
24  import org.apache.hadoop.hbase.CellScanner;
25  import org.apache.hadoop.hbase.classification.InterfaceAudience;
26  import org.apache.hadoop.hbase.util.ReflectionUtils;
27  
28  /**
29   * Factory to create a {@link PayloadCarryingRpcController}
30   */
31  @InterfaceAudience.Private
32  public class RpcControllerFactory {
33  
34    public static final String CUSTOM_CONTROLLER_CONF_KEY = "hbase.rpc.controllerfactory.class";
35    protected final Configuration conf;
36  
37    public RpcControllerFactory(Configuration conf) {
38      this.conf = conf;
39    }
40  
41    public PayloadCarryingRpcController newController() {
42      return new PayloadCarryingRpcController();
43    }
44  
45    public PayloadCarryingRpcController newController(final CellScanner cellScanner) {
46      return new PayloadCarryingRpcController(cellScanner);
47    }
48  
49    public PayloadCarryingRpcController newController(final List<CellScannable> cellIterables) {
50      return new PayloadCarryingRpcController(cellIterables);
51    }
52  
53  
54    public static RpcControllerFactory instantiate(Configuration configuration) {
55      String rpcControllerFactoryClazz =
56          configuration.get(CUSTOM_CONTROLLER_CONF_KEY,
57            RpcControllerFactory.class.getName());
58      return ReflectionUtils.instantiateWithCustomCtor(rpcControllerFactoryClazz,
59        new Class[] { Configuration.class }, new Object[] { configuration });
60    }
61  }