mirror of
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97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/*
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* Copyright (c) 2013-2014, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SQLPP_TRANSACTION_H
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#define SQLPP_TRANSACTION_H
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#include <stdexcept>
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namespace sqlpp
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{
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static constexpr bool quiet_auto_rollback = false;
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static constexpr bool report_auto_rollback = true;
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template<typename Db>
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class transaction_t
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{
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Db& _db;
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const bool _report_unfinished_transaction;
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bool _finished = false;
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public:
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transaction_t(Db& db, bool report_unfinished_transaction):
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_db(db),
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_report_unfinished_transaction(report_unfinished_transaction)
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{
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_db.start_transaction();
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}
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transaction_t(const transaction_t&) = delete;
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transaction_t(transaction_t&&) = default;
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transaction_t& operator=(const transaction_t&) = delete;
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transaction_t& operator=(transaction_t&&) = delete;
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~transaction_t()
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{
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if (not _finished)
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{
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try
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{
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_db.rollback_transaction(_report_unfinished_transaction);
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}
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catch(const std::exception& e)
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{
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_db.report_rollback_failure(std::string("auto rollback failed: ") + e.what());
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}
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catch(...)
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{
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_db.report_rollback_failure("auto rollback failed with unknown exception");
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}
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}
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}
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void commit()
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{
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_finished = true;
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_db.commit_transaction();
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}
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void rollback()
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{
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_finished = true;
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_db.rollback_transaction(false);
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}
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};
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template<typename Db>
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transaction_t<Db> start_transaction(Db& db, bool report_unfinished_transaction = report_auto_rollback)
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{
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return { db, report_unfinished_transaction };
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};
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}
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#endif
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