Constructor Detail

• Compressor

  public Compressor()

Method Detail

• main

  public static void main(String[] args)
                   throws IOException

  Command line tool to compress and uncompress WALs.

  Throws:

  IOException

• printHelp

  private static void printHelp()

• transformFile

  private static void transformFile(org.apache.hadoop.fs.Path input,
                   org.apache.hadoop.fs.Path output)
                             throws IOException

  Throws:

  IOException

• readCompressed

  @Deprecated
  static byte[] readCompressed(DataInput in,
                                 Dictionary dict)
                        throws IOException

  Deprecated. 
  Reads the next compressed entry and returns it as a byte array

  Parameters:

  in - the DataInput to read from

  dict - the dictionary we use for our read.

  Returns:

  the uncompressed array.

  Throws:

  IOException

• uncompressIntoArray

  @Deprecated
  static int uncompressIntoArray(byte[] to,
                                   int offset,
                                   DataInput in,
                                   Dictionary dict)
                          throws IOException

  Deprecated. 
  Reads a compressed entry into an array. The output into the array ends up length-prefixed.

  Parameters:

  to - the array to write into

  offset - array offset to start writing to

  in - the DataInput to read from

  dict - the dictionary to use for compression

  Returns:

  the length of the uncompressed data

  Throws:

  IOException

• writeCompressed

  @Deprecated
  static void writeCompressed(byte[] data,
                                int offset,
                                int length,
                                DataOutput out,
                                Dictionary dict)
                       throws IOException

  Deprecated. 
  Compresses and writes an array to a DataOutput

  Parameters:

  data - the array to write.

  out - the DataOutput to write into

  dict - the dictionary to use for compression

  Throws:

  IOException

• toShort

  static short toShort(byte hi,
              byte lo)