104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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*
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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, version 2.0,
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* as published by the Free Software Foundation.
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*
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* This program is also distributed with certain software (including
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* but not limited to OpenSSL) that is licensed under separate terms,
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* as designated in a particular file or component or in included license
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* documentation. The authors of MySQL hereby grant you an additional
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* permission to link the program and your derivative works with the
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* separately licensed software that they have included with MySQL.
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*
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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, version 2.0, for more details.
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*
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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 PLUGIN_X_CLIENT_STREAM_CONNECTION_OUTPUT_STREAM_H_
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#define PLUGIN_X_CLIENT_STREAM_CONNECTION_OUTPUT_STREAM_H_
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#include <google/protobuf/io/zero_copy_stream.h>
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#include <zlib.h>
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#include <memory>
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#include <utility>
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#include "../mysqlxclient/xconnection.h"
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namespace xcl {
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class Connection_output_stream
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: public google::protobuf::io::ZeroCopyOutputStream {
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public:
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using ZeroCopyOutputStream = google::protobuf::io::ZeroCopyOutputStream;
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using pb_int64 = google::protobuf::int64;
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public:
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explicit Connection_output_stream(XConnection *connection)
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: m_connection(connection) {}
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~Connection_output_stream() override { Flush(); }
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XError getLastError() const {
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if (m_error) {
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DBUG_LOG("debug",
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"Connection_output_stream::getLastError() = {error_code:"
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<< m_error.error() << ", msg: \"" << m_error.what() << "\"");
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}
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return m_error;
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}
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void Flush() {
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if (m_input_buffer_offset && !m_error) {
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m_all += m_input_buffer_offset;
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m_error = m_connection->write(m_input_buffer, m_input_buffer_offset);
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m_input_buffer_offset = 0;
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}
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}
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bool Next(void **data, int *size) override {
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const auto k_input_buffer_max_size = sizeof(m_input_buffer);
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if (m_error) return false;
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if (m_input_buffer_offset == k_input_buffer_max_size) {
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Flush();
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m_input_buffer_offset = 0;
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return Next(data, size);
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}
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*size = m_input_buffer_offset = k_input_buffer_max_size;
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*data = static_cast<void *>(m_input_buffer);
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return true;
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}
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void BackUp(int count) override { m_input_buffer_offset -= count; }
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pb_int64 ByteCount() const override { return m_all + m_input_buffer_offset; }
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private:
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XError m_error;
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XConnection *m_connection;
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pb_int64 m_all = 0;
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uint8_t m_input_buffer[1000];
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int m_input_buffer_offset = 0;
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};
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} // namespace xcl
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#endif // PLUGIN_X_CLIENT_STREAM_CONNECTION_OUTPUT_STREAM_H_
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