std_trace_stream.hpp

/*

Copyright (c) 2002-2005, Yauheni Akhotnikau
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

- The name of the author may not be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.

*/

#if !defined( _OESS_1__DB__STORAGE__TRX__STD_TRACE_STREAM_HPP_ )
#define _OESS_1__DB__STORAGE__TRX__STD_TRACE_STREAM_HPP_

#include <memory>

#include <oess_1/db/storage/trx/h/types.hpp>

namespace oess_1 {

namespace db {

namespace storage {

namespace trx {

namespace impl
{
  class chain_ostream_t;
} /* namespace impl */

//
// std_trace_stream_t
//

class std_trace_stream_t
  : public trace_stream_t
  {
  public :
    std_trace_stream_t();
    virtual ~std_trace_stream_t();

    virtual void
    open(
      const std::string & physic_name,
      const config_t & config,
      bool is_read_only );

    virtual void
    create(
      const std::string & physic_name,
      const config_t & config );

    virtual void
    destroy(
      const std::string & physic_name );

    virtual bool
    is_exists(
      const std::string & physic_name );

    virtual void
    append(
      const trace_stream_item_t & item );

    virtual void
    reverse_replay(
      committer_t & committer,
      trace_file_number_set_t * used_files = 0,
      trace_file_number_set_t * unused_files = 0,
      std::ostream * verbose_stream = 0 );

    virtual void
    close();

  protected :

    virtual std::auto_ptr< impl::chain_ostream_t >
    create_chain_ostream();


    bool
    is_open() const;


    const std::string &
    physic_name() const;


    const config_t &
    config() const;


    trace_file_number_set_t &
    all_traces();

  private :

    std::string m_physic_name;


    config_t  m_config;


    trace_file_number_set_t m_all_traces;


    bool  m_is_open;


    bool  m_is_read_only;


    std::auto_ptr< impl::chain_ostream_t >  m_chain_ostream;
  };

//
// last_trx_only_trace_stream_t
//

class last_trx_only_trace_stream_t
  : public std_trace_stream_t
  {
    typedef std_trace_stream_t base_type_t;
  public :
    last_trx_only_trace_stream_t();
    virtual ~last_trx_only_trace_stream_t();

  protected :

    virtual std::auto_ptr< impl::chain_ostream_t >
    create_chain_ostream();
  };

//
// pseudo_trace_stream_t
//

class pseudo_trace_stream_t
  : public trace_stream_t
  {
  public :
    pseudo_trace_stream_t();
    virtual ~pseudo_trace_stream_t();

    virtual void
    open(
      const std::string & physic_name,
      const config_t & config,
      bool is_read_only );

    virtual void
    create(
      const std::string & physic_name,
      const config_t & config );

    virtual void
    destroy(
      const std::string & physic_name );

    virtual bool
    is_exists(
      const std::string & physic_name );

    virtual void
    append(
      const trace_stream_item_t & item );

    virtual void
    reverse_replay(
      committer_t & committer,
      trace_file_number_set_t * used_files = 0,
      trace_file_number_set_t * unused_files = 0,
      std::ostream * verbose_stream = 0 );

    virtual void
    close();
  };

} /* namespace trx */

} /* namespace storage */

} /* namespace db */

} /* namespace oess */

#endif

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