| /** |
| * 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 org.apache.avro.Schema; |
| import org.apache.avro.generic.GenericRecord; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| import java.lang.reflect.Field; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.avro.mapred.Pair; |
| |
| import org.apache.sqoop.avro.AvroUtil; |
| import org.apache.sqoop.lib.SqoopRecord; |
| |
| |
| public class MergeParquetMapper |
| extends MergeGenericRecordExportMapper<GenericRecord, GenericRecord> { |
| |
| private Map<String, Pair<String, String>> sqoopRecordFields = new HashMap<String, Pair<String, String>>(); |
| private SqoopRecord sqoopRecordImpl; |
| |
| @Override |
| protected void setup(Context context) throws IOException, InterruptedException { |
| super.setup(context); |
| Configuration conf = context.getConfiguration(); |
| final String userClassName = conf.get(MergeJob.MERGE_SQOOP_RECORD_KEY); |
| try { |
| final Class<? extends Object> clazz = Class.forName(userClassName, true, |
| Thread.currentThread().getContextClassLoader()); |
| sqoopRecordImpl = (SqoopRecord) ReflectionUtils.newInstance(clazz, conf); |
| for (final Field field : clazz.getDeclaredFields()) { |
| final String fieldName = field.getName(); |
| final String fieldTypeName = field.getType().getName(); |
| sqoopRecordFields.put(fieldName.toLowerCase(), new Pair<String, String>(fieldName, |
| fieldTypeName)); |
| } |
| } catch (ClassNotFoundException e) { |
| throw new IOException("Cannot find the user record class with class name" |
| + userClassName, e); |
| } |
| } |
| |
| @Override |
| protected void map(GenericRecord key, GenericRecord val, Context context) |
| throws IOException, InterruptedException { |
| processRecord(toSqoopRecord(val), context); |
| } |
| |
| private SqoopRecord toSqoopRecord(GenericRecord genericRecord) throws IOException { |
| Schema avroSchema = genericRecord.getSchema(); |
| for (Schema.Field field : avroSchema.getFields()) { |
| Pair<String, String> sqoopRecordField = sqoopRecordFields.get(field.name().toLowerCase()); |
| if (null == sqoopRecordField) { |
| throw new IOException("Cannot find field '" + field.name() + "' in fields of user class" |
| + sqoopRecordImpl.getClass().getName() + ". Fields are: " |
| + Arrays.deepToString(sqoopRecordFields.values().toArray())); |
| } |
| Object avroObject = genericRecord.get(field.name()); |
| Object fieldVal = AvroUtil.fromAvro(avroObject, field.schema(), sqoopRecordField.value()); |
| sqoopRecordImpl.setField(sqoopRecordField.key(), fieldVal); |
| } |
| return sqoopRecordImpl; |
| } |
| |
| } |