/**
* 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.manager.ConnManager;
import com.cloudera.sqoop.manager.ExportJobContext;
import com.cloudera.sqoop.mapreduce.ExportJobBase;
import com.cloudera.sqoop.mapreduce.db.DBConfiguration;
import com.cloudera.sqoop.mapreduce.db.DBOutputFormat;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.io.DefaultStringifier;
import org.apache.hadoop.io.MapWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.InputFormat;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.OutputFormat;
import org.apache.sqoop.mapreduce.hcat.SqoopHCatUtilities;
import org.kitesdk.data.mapreduce.DatasetKeyInputFormat;
import java.io.IOException;
import java.util.Map;
/**
* Run an export using JDBC (JDBC-based ExportOutputFormat).
*/
public class JdbcExportJob extends ExportJobBase {
private FileType fileType;
public static final Log LOG = LogFactory.getLog(
JdbcExportJob.class.getName());
public JdbcExportJob(final ExportJobContext context) {
super(context);
}
public JdbcExportJob(final ExportJobContext ctxt,
final Class<? extends Mapper> mapperClass,
final Class<? extends InputFormat> inputFormatClass,
final Class<? extends OutputFormat> outputFormatClass) {
super(ctxt, mapperClass, inputFormatClass, outputFormatClass);
}
@Override
protected void configureInputFormat(Job job, String tableName,
String tableClassName, String splitByCol)
throws ClassNotFoundException, IOException {
fileType = getInputFileType();
super.configureInputFormat(job, tableName, tableClassName, splitByCol);
if (isHCatJob) {
SqoopHCatUtilities.configureExportInputFormat(options, job,
context.getConnManager(), tableName, job.getConfiguration());
return;
} else if (fileType == FileType.AVRO_DATA_FILE) {
LOG.debug("Configuring for Avro export");
configureGenericRecordExportInputFormat(job, tableName);
} else if (fileType == FileType.PARQUET_FILE) {
LOG.debug("Configuring for Parquet export");
configureGenericRecordExportInputFormat(job, tableName);
FileSystem fs = FileSystem.get(job.getConfiguration());
String uri = "dataset:" + fs.makeQualified(getInputPath());
DatasetKeyInputFormat.configure(job).readFrom(uri);
}
}
private void configureGenericRecordExportInputFormat(Job job, String tableName)
throws IOException {
ConnManager connManager = context.getConnManager();
Map<String, Integer> columnTypeInts;
if (options.getCall() == null) {
columnTypeInts = connManager.getColumnTypes(
tableName,
options.getSqlQuery());
} else {
columnTypeInts = connManager.getColumnTypesForProcedure(
options.getCall());
}
MapWritable columnTypes = new MapWritable();
for (Map.Entry<String, Integer> e : columnTypeInts.entrySet()) {
Text columnName = new Text(e.getKey());
Text columnText = new Text(
connManager.toJavaType(tableName, e.getKey(), e.getValue()));
columnTypes.put(columnName, columnText);
}
DefaultStringifier.store(job.getConfiguration(), columnTypes,
AvroExportMapper.AVRO_COLUMN_TYPES_MAP);
}
@Override
protected Class<? extends InputFormat> getInputFormatClass()
throws ClassNotFoundException {
if (isHCatJob) {
return SqoopHCatUtilities.getInputFormatClass();
}
switch (fileType) {
case AVRO_DATA_FILE:
return AvroInputFormat.class;
case PARQUET_FILE:
return DatasetKeyInputFormat.class;
default:
return super.getInputFormatClass();
}
}
@Override
protected Class<? extends Mapper> getMapperClass() {
if (isHCatJob) {
return SqoopHCatUtilities.getExportMapperClass();
}
switch (fileType) {
case SEQUENCE_FILE:
return SequenceFileExportMapper.class;
case AVRO_DATA_FILE:
return AvroExportMapper.class;
case PARQUET_FILE:
return ParquetExportMapper.class;
case UNKNOWN:
default:
return TextExportMapper.class;
}
}
@Override
protected void configureOutputFormat(Job job, String tableName,
String tableClassName) throws IOException {
ConnManager mgr = context.getConnManager();
try {
String username = options.getUsername();
if (null == username || username.length() == 0) {
DBConfiguration.configureDB(job.getConfiguration(),
mgr.getDriverClass(),
options.getConnectString(),
options.getConnectionParams());
} else {
DBConfiguration.configureDB(job.getConfiguration(),
mgr.getDriverClass(),
options.getConnectString(),
username, options.getPassword(),
options.getConnectionParams());
}
String [] colNames = options.getColumns();
if (null == colNames) {
colNames = mgr.getColumnNames(tableName);
}
if (mgr.escapeTableNameOnExport()) {
DBOutputFormat.setOutput(job, mgr.escapeTableName(tableName), colNames);
} else {
DBOutputFormat.setOutput(job, tableName, colNames);
}
job.setOutputFormatClass(getOutputFormatClass());
job.getConfiguration().set(SQOOP_EXPORT_TABLE_CLASS_KEY, tableClassName);
} catch (ClassNotFoundException cnfe) {
throw new IOException("Could not load OutputFormat", cnfe);
}
}
}