| |
| /** |
| * 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.sqoop.mapreduce; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.generic.GenericRecord; |
| import org.apache.avro.mapred.Pair; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.sqoop.avro.AvroUtil; |
| |
| import org.apache.sqoop.lib.SqoopRecord; |
| |
| |
| public class MergeParquetReducer extends Reducer<Text, MergeRecord,GenericRecord,NullWritable> { |
| |
| private Schema schema = null; |
| private boolean bigDecimalFormatString = true; |
| private Map<String, Pair<String, String>> sqoopRecordFields = new HashMap<String, Pair<String, String>>(); |
| |
| @Override |
| protected void setup(Context context) throws IOException, InterruptedException { |
| schema = new Schema.Parser().parse(context.getConfiguration().get("parquetjob.avro.schema")); |
| bigDecimalFormatString = context.getConfiguration().getBoolean( |
| ImportJobBase.PROPERTY_BIGDECIMAL_FORMAT, ImportJobBase.PROPERTY_BIGDECIMAL_FORMAT_DEFAULT); |
| } |
| |
| @Override |
| public void reduce(Text key, Iterable<MergeRecord> vals, Context context) |
| throws IOException, InterruptedException { |
| SqoopRecord bestRecord = null; |
| try { |
| for (MergeRecord mergeRecord : vals) { |
| if (null == bestRecord && !mergeRecord.isNewRecord()) { |
| // Use an old record if we don't have a new record. |
| bestRecord = (SqoopRecord) mergeRecord.getSqoopRecord().clone(); |
| } else if (mergeRecord.isNewRecord()) { |
| bestRecord = (SqoopRecord) mergeRecord.getSqoopRecord().clone(); |
| } |
| } |
| } catch (CloneNotSupportedException cnse) { |
| throw new IOException(cnse); |
| } |
| |
| if (null != bestRecord) { |
| GenericRecord outKey = AvroUtil.toGenericRecord(bestRecord.getFieldMap(), schema, |
| bigDecimalFormatString); |
| context.write(outKey, null); |
| } |
| } |
| } |