package com.gamewave.sqoop.extensions.tansformat_row_key;
 
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.sqoop.hbase.PutTransformer;
 
public class DdtMapInfoTransFormat extends PutTransformer {
 
  public static final Log LOG = LogFactory.getLog(DdtMapInfoTransFormat.class.getName());
  private Map<String, byte[]> serializedFieldNames;
 
  public DdtMapInfoTransFormat() {
      serializedFieldNames = new TreeMap<String, byte[]>();
  }<br>
  /**
   * Return the serialized bytes for a field name, using the cache if it‘s
   * already in there.
   */
  private byte[] getFieldNameBytes(String fieldName) {
      byte[] cachedName = serializedFieldNames.get(fieldName);
      if (null != cachedName) {
          // Cache hit. We‘re done.
          return cachedName;
      }
      // Do the serialization and memoize the result.
      byte[] nameBytes = Bytes.toBytes(fieldName);
      serializedFieldNames.put(fieldName, nameBytes);
      return nameBytes;
  }
 
  @Override
  /** {@inheritDoc} */
  public List<Put> getPutCommand(Map<String, Object> fields)throws IOException {
      String rowKeyCol = getRowKeyColumn();
      String colFamily = getColumnFamily();
      byte[] colFamilyBytes = Bytes.toBytes(colFamily);
      Object rowKey = fields.get(rowKeyCol);
      if (null == rowKey) {
          // If the row-key column is null, we don‘t insert this row.
          LOG.warn("Could not insert row with null value for row-key column: "+ rowKeyCol);
          return null;
      }
      Put put = new Put(Bytes.toBytes(rowKey.toString() + ":custom"));
      for (Map.Entry<String, Object> fieldEntry : fields.entrySet()) {
          String colName = fieldEntry.getKey();
          if (!colName.equals(rowKeyCol)) {
              // This is a regular field, not the row key.
              // Add it if it‘s not null.
              Object val = fieldEntry.getValue();
              if (null != val) {
                  put.add(colFamilyBytes, getFieldNameBytes(colName),Bytes.toBytes(val.toString()));
              }
          }
      }
      return Collections.singletonList(put);
  }
}

./sqoop-import -D sqoop.hbase.insert.put.transformer.class=com.gamewave.sqoop.extensions.tansformat_row_key.DdtMapInfoTransFormat –connect jdbc:mysql://xxx.xxx.xxx.xxx/service --table ddt_map_info_copy --hbase-create-table --hbase-table ddt_map_info_copy --column-family info --split-by mapId --username root --P --compression-codec lzo