/*
  Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; version 2 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef COMPRESSION_LZ4_WRITER_INCLUDED
#define COMPRESSION_LZ4_WRITER_INCLUDED

#include "i_output_writer.h"
#include "abstract_output_writer_wrapper.h"
#include "i_callable.h"
#include <lz4frame.h>
#include "base/mutex.h"
#include <string.h>

namespace Mysql{
namespace Tools{
namespace Dump{

/**
  Wrapper to another Output Writer, compresses formatted data stream with LZ4.
 */
class Compression_lz4_writer : public I_output_writer,
  public Abstract_output_writer_wrapper
{
public:
  Compression_lz4_writer(
    Mysql::I_callable<bool, const Mysql::Tools::Base::Message_data&>*
    message_handler, Simple_id_generator* object_id_generator);

  ~Compression_lz4_writer();

  void append(const std::string& data_to_append);

private:
  void process_buffer(size_t lz4_result);

  void prepare_buffer(size_t src_size);

  my_boost::mutex m_lz4_mutex;
  LZ4F_compressionContext_t m_compression_context;
  std::vector<char> m_buffer;
};

}
}
}

#endif