/**
* 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.db;
import java.io.IOException;
import java.sql.SQLException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.sqoop.mapreduce.DBWritable;
import org.apache.sqoop.lib.SqoopRecord;
import com.cloudera.sqoop.mapreduce.db.DBConfiguration;
/**
* A InputFormat that reads input data from a SQL table.
* Operates like DataDrivenDBInputFormat, but attempts to recover from
* connection failures based on set recovery options in job configurations
*/
public class SQLServerDBInputFormat<T extends SqoopRecord>
extends DataDrivenDBInputFormat<T> implements Configurable {
private static final Log LOG =
LogFactory.getLog(SQLServerDBInputFormat.class);
public static final String IMPORT_FAILURE_HANDLER_CLASS =
"sqoop.import.failure.handler.class";
@Override
/** {@inheritDoc} */
protected RecordReader<LongWritable, T> createDBRecordReader(
DBInputSplit split, Configuration conf) throws IOException {
DBConfiguration dbConf = getDBConf();
Class<T> inputClass = (Class<T>) (dbConf.getInputClass());
String dbProductName = getDBProductName();
LOG.debug("Creating db record reader for db product: " + dbProductName);
try {
return new SQLServerDBRecordReader<T>(split, inputClass,
conf, getConnection(), dbConf, dbConf.getInputConditions(),
dbConf.getInputFieldNames(), dbConf.getInputTableName(),
dbProductName);
} catch (SQLException ex) {
throw new IOException(ex);
}
}
/** Set Input for table. */
public static void setInput(Job job,
Class<? extends DBWritable> inputClass,
String tableName, String conditions,
String splitBy, String... fieldNames) {
DataDrivenDBInputFormat.setInput(job, inputClass, tableName, conditions,
splitBy, fieldNames);
job.setInputFormatClass(SQLServerDBInputFormat.class);
}
/** Set Input for query. */
public static void setInput(Job job,
Class<? extends DBWritable> inputClass,
String inputQuery, String inputBoundingQuery) {
DataDrivenDBInputFormat.setInput(job, inputClass, inputQuery,
inputBoundingQuery);
job.setInputFormatClass(SQLServerDBInputFormat.class);
}
}