/**
* 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 com.cloudera.sqoop.lib.LargeObjectLoader;
import com.cloudera.sqoop.lib.SqoopRecord;
import com.cloudera.sqoop.mapreduce.AutoProgressMapper;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.mapred.AvroWrapper;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.sqoop.avro.AvroUtil;
import java.io.IOException;
import java.sql.SQLException;
/**
* Imports records by transforming them to Avro records in an Avro data file.
*/
public class AvroImportMapper
extends AutoProgressMapper<LongWritable, SqoopRecord,
AvroWrapper<GenericRecord>, NullWritable> {
private final AvroWrapper<GenericRecord> wrapper =
new AvroWrapper<GenericRecord>();
private Schema schema;
private LargeObjectLoader lobLoader;
private boolean bigDecimalFormatString;
@Override
protected void setup(Context context)
throws IOException, InterruptedException {
Configuration conf = context.getConfiguration();
schema = AvroJob.getMapOutputSchema(conf);
lobLoader = new LargeObjectLoader(conf);
bigDecimalFormatString = conf.getBoolean(
ImportJobBase.PROPERTY_BIGDECIMAL_FORMAT,
ImportJobBase.PROPERTY_BIGDECIMAL_FORMAT_DEFAULT);
}
@Override
protected void map(LongWritable key, SqoopRecord val, Context context)
throws IOException, InterruptedException {
try {
// Loading of LOBs was delayed until we have a Context.
val.loadLargeObjects(lobLoader);
} catch (SQLException sqlE) {
throw new IOException(sqlE);
}
GenericRecord outKey = AvroUtil.toGenericRecord(val.getFieldMap(),
schema, bigDecimalFormatString);
wrapper.datum(outKey);
context.write(wrapper, NullWritable.get());
}
@Override
protected void cleanup(Context context) throws IOException {
if (null != lobLoader) {
lobLoader.close();
}
}
}