001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.client.coprocessor;
019
020import com.google.protobuf.Message;
021import java.io.IOException;
022import org.apache.hadoop.hbase.HBaseInterfaceAudience;
023import org.apache.hadoop.hbase.protobuf.generated.RowProcessorProtos.ProcessRequest;
024import org.apache.hadoop.hbase.regionserver.RowProcessor;
025import org.apache.yetus.audience.InterfaceAudience;
026import org.apache.yetus.audience.InterfaceStability;
027
028/**
029 * Convenience class that is used to make RowProcessorEndpoint invocations. For example usage, refer
030 * TestRowProcessorEndpoint
031 */
032@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)
033@InterfaceStability.Evolving
034public class RowProcessorClient {
035  public static <S extends Message, T extends Message> ProcessRequest
036    getRowProcessorPB(RowProcessor<S, T> r) throws IOException {
037    final ProcessRequest.Builder requestBuilder = ProcessRequest.newBuilder();
038    requestBuilder.setRowProcessorClassName(r.getClass().getName());
039    S s = r.getRequestData();
040    if (s != null) {
041      requestBuilder.setRowProcessorInitializerMessageName(s.getClass().getName());
042      requestBuilder.setRowProcessorInitializerMessage(s.toByteString());
043    }
044    return requestBuilder.build();
045  }
046}