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/*
This file is part of libdjinterop.
libdjinterop is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libdjinterop 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with libdjinterop. If not, see <http://www.gnu.org/licenses/>.
*/
#include <djinterop/enginelibrary/el_storage.hpp>
#include <djinterop/enginelibrary/el_transaction_guard_impl.hpp>
namespace djinterop
{
namespace enginelibrary
{
el_transaction_guard_impl::el_transaction_guard_impl(
std::shared_ptr<el_storage> storage)
: storage_{std::move(storage)}, savepoint_{++storage_->last_savepoint}
{
// TODO (haslersn): Should el_storage::last_savepoint be atomic such that
// this is thread-safe?
storage_->db << ("SAVEPOINT s" + std::to_string(savepoint_));
}
el_transaction_guard_impl::~el_transaction_guard_impl()
{
if (savepoint_ != 0)
{
try
{
storage_->db << ("ROLLBACK TO s" + std::to_string(savepoint_));
}
catch (...)
{
// The exception is intentionally swallowed. An exception could for
// example arise if SQLite performed an automatic rollback, causing
// the explicit rollback to return an error. Such an error does no
// harm, so we swallow it.
//
// TODO (haslersn): We could still issue a warning
}
}
}
void el_transaction_guard_impl::commit()
{
auto savepoint = savepoint_;
savepoint_ = 0;
storage_->db << ("RELEASE s" + std::to_string(savepoint));
}
} // namespace enginelibrary
} // namespace djinterop
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