com.cloudera.sqoop.mapreduce.MySQLExportJob.java Source code

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Here is the source code for com.cloudera.sqoop.mapreduce.MySQLExportJob.java

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/**
 * Licensed to Cloudera, Inc. under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Cloudera, Inc. 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 com.cloudera.sqoop.mapreduce;

import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.output.NullOutputFormat;
import com.cloudera.sqoop.mapreduce.db.DBConfiguration;
import com.cloudera.sqoop.mapreduce.db.DataDrivenDBInputFormat;
import org.apache.hadoop.mapreduce.lib.db.DBWritable;

import com.cloudera.sqoop.manager.ConnManager;
import com.cloudera.sqoop.manager.ExportJobContext;
import com.cloudera.sqoop.manager.MySQLUtils;

/**
 * Class that runs an export job using mysqlimport in the mapper.
 */
public class MySQLExportJob extends ExportJobBase {

    public static final Log LOG = LogFactory.getLog(MySQLExportJob.class.getName());

    public MySQLExportJob(final ExportJobContext context) {
        super(context, null, null, NullOutputFormat.class);
    }

    @Override
    /**
     * Configure the inputformat to use for the job.
     */
    protected void configureInputFormat(Job job, String tableName, String tableClassName, String splitByCol)
            throws ClassNotFoundException, IOException {

        // Configure the delimiters, etc.
        Configuration conf = job.getConfiguration();
        conf.setInt(MySQLUtils.OUTPUT_FIELD_DELIM_KEY, options.getOutputFieldDelim());
        conf.setInt(MySQLUtils.OUTPUT_RECORD_DELIM_KEY, options.getOutputRecordDelim());
        conf.setInt(MySQLUtils.OUTPUT_ENCLOSED_BY_KEY, options.getOutputEnclosedBy());
        conf.setInt(MySQLUtils.OUTPUT_ESCAPED_BY_KEY, options.getOutputEscapedBy());
        conf.setBoolean(MySQLUtils.OUTPUT_ENCLOSE_REQUIRED_KEY, options.isOutputEncloseRequired());
        String[] extraArgs = options.getExtraArgs();
        if (null != extraArgs) {
            conf.setStrings(MySQLUtils.EXTRA_ARGS_KEY, extraArgs);
        }

        ConnManager mgr = context.getConnManager();
        String username = options.getUsername();
        if (null == username || username.length() == 0) {
            DBConfiguration.configureDB(job.getConfiguration(), mgr.getDriverClass(), options.getConnectString());
        } else {
            DBConfiguration.configureDB(job.getConfiguration(), mgr.getDriverClass(), options.getConnectString(),
                    username, options.getPassword());
        }

        String[] colNames = options.getColumns();
        if (null == colNames) {
            colNames = mgr.getColumnNames(tableName);
        }

        String[] sqlColNames = null;
        if (null != colNames) {
            sqlColNames = new String[colNames.length];
            for (int i = 0; i < colNames.length; i++) {
                sqlColNames[i] = mgr.escapeColName(colNames[i]);
            }
        }

        // Note that mysqldump also does *not* want a quoted table name.
        DataDrivenDBInputFormat.setInput(job, DBWritable.class, tableName, null, null, sqlColNames);

        // Configure the actual InputFormat to use. 
        super.configureInputFormat(job, tableName, tableClassName, splitByCol);
    }

    @Override
    protected Class<? extends Mapper> getMapperClass() {
        if (inputIsSequenceFiles()) {
            return MySQLRecordExportMapper.class;
        } else {
            return MySQLTextExportMapper.class;
        }
    }
}