code: @Override
    public void write(DataOutput out) throws IOException {
      Text.writeString(out, filename);
      Text.writeString(out, jobid);
      out.writeBoolean(isJobConfFile);
      out.writeBoolean(isJobHistoryFile);
    }
docs: /*
  (non-Javadoc)
  
  @see org.apache.hadoop.io.Writable#write(java.io.DataOutput)