63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/*
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Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef COMPRESSION_ZLIB_WRITER_INCLUDED
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#define COMPRESSION_ZLIB_WRITER_INCLUDED
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#include "i_output_writer.h"
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#include "abstract_output_writer_wrapper.h"
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#include "i_callable.h"
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#include "base/mutex.h"
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#include "zlib.h"
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#include <string.h>
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namespace Mysql{
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namespace Tools{
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namespace Dump{
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/**
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Wrapper to another Output Writer, compresses formatted data stream with zlib.
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*/
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class Compression_zlib_writer : public I_output_writer,
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public Abstract_output_writer_wrapper
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{
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public:
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Compression_zlib_writer(
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Mysql::I_callable<bool, const Mysql::Tools::Base::Message_data&>*
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message_handler, Simple_id_generator* object_id_generator,
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uint compression_level);
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~Compression_zlib_writer();
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void append(const std::string& data_to_append);
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private:
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void process_buffer(bool flush_stream);
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my_boost::mutex m_zlib_mutex;
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z_stream m_compression_context;
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std::vector<char> m_buffer;
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const static int buffer_size= 128*1024;
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};
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}
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}
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}
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#endif
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