org.apache.sqoop.mapreduce.JdbcCallExportJob Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of sqoop Show documentation
Bandwidth controlled sqoop for network aware data migration
The newest version!
/**
 * 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 java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.db.DBConfiguration;
import org.apache.sqoop.mapreduce.db.DBOutputFormat;

import com.cloudera.sqoop.manager.ConnManager;
import com.cloudera.sqoop.manager.ExportJobContext;
import com.google.common.base.Strings;

/**
 * Run an export using JDBC (JDBC-based ExportCallOutputFormat) to
 * call the stored procedure.
 */
public class JdbcCallExportJob extends JdbcExportJob {
  public static final String SQOOP_EXPORT_CALL_KEY = "sqoop.export.call";

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

  public JdbcCallExportJob(final ExportJobContext context) {
    super(context, null, null, ExportCallOutputFormat.class);
  }

  public JdbcCallExportJob(final ExportJobContext ctxt,
      final Class mapperClass,
      final Class inputFormatClass,
      final Class outputFormatClass) {
    super(ctxt, mapperClass, inputFormatClass, outputFormatClass);
  }

  /**
   * makes sure the job knows what stored procedure to call.
   */
  @Override
  protected void propagateOptionsToJob(Job job) {
    super.propagateOptionsToJob(job);
    job.getConfiguration().set(SQOOP_EXPORT_CALL_KEY, options.getCall());
  }

  @Override
  protected void configureOutputFormat(Job job, String tableName,
      String tableClassName) throws IOException {
    String procedureName = job.getConfiguration().get(SQOOP_EXPORT_CALL_KEY);

    ConnManager mgr = context.getConnManager();
    try {
      if (Strings.isNullOrEmpty(options.getUsername())) {
        DBConfiguration.configureDB(job.getConfiguration(),
            mgr.getDriverClass(),
            options.getConnectString(),
            options.getConnectionParams());
      } else {
        DBConfiguration.configureDB(job.getConfiguration(),
            mgr.getDriverClass(),
            options.getConnectString(),
            options.getUsername(),
            options.getPassword(),
            options.getConnectionParams());
      }

      String [] colNames = options.getColumns();
      if (null == colNames) {
        colNames = mgr.getColumnNamesForProcedure(procedureName);
      }
      DBOutputFormat.setOutput(
        job,
        mgr.escapeTableName(procedureName),
        mgr.escapeColNames(colNames));

      job.setOutputFormatClass(getOutputFormatClass());
      job.getConfiguration().set(SQOOP_EXPORT_TABLE_CLASS_KEY, tableClassName);
    } catch (ClassNotFoundException cnfe) {
      throw new IOException("Could not load OutputFormat", cnfe);
    }
  }

}