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