/**
* 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.job.etl;
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.sqoop.common.SqoopException;
import org.apache.sqoop.job.JobConstants;
import org.apache.sqoop.job.MapreduceExecutionError;
import org.apache.sqoop.job.io.Data;
import org.apache.sqoop.etl.io.DataReader;
import org.apache.sqoop.utils.ClassUtils;
public class HdfsTextImportLoader extends Loader {
private final char fieldDelimiter;
private final char recordDelimiter;
public HdfsTextImportLoader() {
fieldDelimiter = Data.DEFAULT_FIELD_DELIMITER;
recordDelimiter = Data.DEFAULT_RECORD_DELIMITER;
}
@Override
public void load(LoaderContext context, Object oc, Object oj) throws Exception{
DataReader reader = context.getDataReader();
reader.setFieldDelimiter(fieldDelimiter);
Configuration conf = new Configuration();
// Configuration conf = ((EtlContext)context).getConfiguration();
String filename = context.getString(JobConstants.JOB_MR_OUTPUT_FILE);
String codecname = context.getString(JobConstants.JOB_MR_OUTPUT_CODEC);
CompressionCodec codec = null;
if (codecname != null) {
Class<?> clz = ClassUtils.loadClass(codecname);
if (clz == null) {
throw new SqoopException(MapreduceExecutionError.MAPRED_EXEC_0009, codecname);
}
try {
codec = (CompressionCodec) clz.newInstance();
if (codec instanceof Configurable) {
((Configurable) codec).setConf(conf);
}
} catch (Exception e) {
throw new SqoopException(MapreduceExecutionError.MAPRED_EXEC_0010, codecname, e);
}
filename += codec.getDefaultExtension();
}
try {
Path filepath = new Path(filename);
FileSystem fs = filepath.getFileSystem(conf);
BufferedWriter filewriter;
DataOutputStream filestream = fs.create(filepath, false);
if (codec != null) {
filewriter = new BufferedWriter(new OutputStreamWriter(
codec.createOutputStream(filestream, codec.createCompressor()),
Data.CHARSET_NAME));
} else {
filewriter = new BufferedWriter(new OutputStreamWriter(
filestream, Data.CHARSET_NAME));
}
String csv;
while ((csv = reader.readCsvRecord()) != null) {
filewriter.write(csv + recordDelimiter);
}
filewriter.close();
} catch (IOException e) {
throw new SqoopException(MapreduceExecutionError.MAPRED_EXEC_0018, e);
}
}
}