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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.client.coprocessor;
20  
21  import java.io.IOException;
22  
23  import org.apache.hadoop.classification.InterfaceAudience;
24  import org.apache.hadoop.classification.InterfaceStability;
25  import org.apache.hadoop.hbase.protobuf.generated.RowProcessorProtos.RowProcessorRequest;
26  import org.apache.hadoop.hbase.regionserver.RowProcessor;
27  
28  import com.google.protobuf.Message;
29  /**
30   * Convenience class that is used to make RowProcessorEndpoint invocations.
31   * For example usage, refer TestRowProcessorEndpoint
32   *
33   */
34  @InterfaceAudience.Public
35  @InterfaceStability.Evolving
36  public class RowProcessorClient {
37    public static <S extends Message, T extends Message>
38    RowProcessorRequest getRowProcessorPB(RowProcessor<S,T> r)
39        throws IOException {
40      final RowProcessorRequest.Builder requestBuilder =
41          RowProcessorRequest.newBuilder();
42      requestBuilder.setRowProcessorClassName(r.getClass().getName());
43      S s = r.getRequestData();
44      if (s != null) {
45        requestBuilder.setRowProcessorInitializerMessageName(s.getClass().getName());
46        requestBuilder.setRowProcessorInitializerMessage(s.toByteString());
47      }
48      return requestBuilder.build();
49    }
50  }