| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.phoenix.mapreduce; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.phoenix.util.ColumnInfo; |
| import org.apache.phoenix.util.UpsertExecutor; |
| import org.apache.phoenix.util.json.JsonUpsertExecutor; |
| import org.codehaus.jackson.map.ObjectMapper; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * MapReduce mapper that converts JSON input lines into KeyValues that can be written to HFiles. |
| * <p/> |
| * KeyValues are produced by executing UPSERT statements on a Phoenix connection and then |
| * extracting the created KeyValues and rolling back the statement execution before it is |
| * committed to HBase. |
| */ |
| public class JsonToKeyValueMapper extends FormatToBytesWritableMapper<Map<?, ?>> { |
| |
| private LineParser<Map<?, ?>> lineParser; |
| |
| @Override |
| protected LineParser<Map<?, ?>> getLineParser() { |
| return lineParser; |
| } |
| |
| @Override |
| protected void setup(Context context) throws IOException, InterruptedException { |
| super.setup(context); |
| lineParser = new JsonLineParser(); |
| } |
| |
| @VisibleForTesting |
| @Override |
| protected UpsertExecutor<Map<?, ?>, ?> buildUpsertExecutor(Configuration conf) { |
| String tableName = conf.get(TABLE_NAME_CONFKEY); |
| Preconditions.checkNotNull(tableName, "table name is not configured"); |
| |
| List<ColumnInfo> columnInfoList = buildColumnInfoList(conf); |
| |
| return new JsonUpsertExecutor(conn, tableName, columnInfoList, upsertListener); |
| } |
| |
| @VisibleForTesting |
| static class JsonLineParser implements LineParser<Map<?, ?>> { |
| private final ObjectMapper mapper = new ObjectMapper(); |
| |
| @Override |
| public Map<?, ?> parse(String input) throws IOException { |
| return mapper.readValue(input, Map.class); |
| } |
| } |
| } |