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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include <cstdio>
#include <fmt/format.h>
#include "mongo/db/storage/wiredtiger/wiredtiger_begin_transaction_block.h"
#include "mongo/db/repl/repl_settings.h"
#include "mongo/db/repl_set_member_in_standalone_mode.h"
#include "mongo/db/storage/storage_parameters_gen.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_util.h"
#include "mongo/util/errno_util.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
using namespace fmt::literals;
WiredTigerBeginTxnBlock::WiredTigerBeginTxnBlock(
WT_SESSION* session,
PrepareConflictBehavior prepareConflictBehavior,
RoundUpPreparedTimestamps roundUpPreparedTimestamps,
RoundUpReadTimestamp roundUpReadTimestamp,
RecoveryUnit::UntimestampedWriteAssertionLevel allowUntimestampedWrite)
: _session(session) {
invariant(!_rollback);
str::stream builder;
if (prepareConflictBehavior == PrepareConflictBehavior::kIgnoreConflicts) {
builder << "ignore_prepare=true,";
} else if (prepareConflictBehavior == PrepareConflictBehavior::kIgnoreConflictsAllowWrites) {
builder << "ignore_prepare=force,";
}
if (roundUpPreparedTimestamps == RoundUpPreparedTimestamps::kRound ||
roundUpReadTimestamp == RoundUpReadTimestamp::kRound) {
builder << "roundup_timestamps=(";
if (roundUpPreparedTimestamps == RoundUpPreparedTimestamps::kRound) {
builder << "prepared=true,";
}
if (roundUpReadTimestamp == RoundUpReadTimestamp::kRound) {
builder << "read=true";
}
builder << "),";
}
if (allowUntimestampedWrite != RecoveryUnit::UntimestampedWriteAssertionLevel::kEnforce) {
builder << "no_timestamp=true,";
} else if (MONGO_unlikely(gAllowUnsafeUntimestampedWrites &&
getReplSetMemberInStandaloneMode(getGlobalServiceContext()) &&
!repl::ReplSettings::shouldRecoverFromOplogAsStandalone())) {
// We can safely ignore setting this configuration option when recovering from the oplog as
// standalone because:
// 1. Replaying oplog entries write with a timestamp.
// 2. The instance is put in read-only mode after oplog application has finished.
builder << "no_timestamp=true,";
}
const std::string beginTxnConfigString = builder;
invariantWTOK(_session->begin_transaction(_session, beginTxnConfigString.c_str()), _session);
_rollback = true;
}
WiredTigerBeginTxnBlock::WiredTigerBeginTxnBlock(WT_SESSION* session, const char* config)
: _session(session) {
invariant(!_rollback);
invariantWTOK(_session->begin_transaction(_session, config), _session);
_rollback = true;
}
WiredTigerBeginTxnBlock::~WiredTigerBeginTxnBlock() {
if (_rollback) {
invariant(_session->rollback_transaction(_session, nullptr) == 0);
}
}
Status WiredTigerBeginTxnBlock::setReadSnapshot(Timestamp readTimestamp) {
invariant(_rollback);
return wtRCToStatus(
_session->timestamp_transaction_uint(_session, WT_TS_TXN_TYPE_READ, readTimestamp.asULL()),
_session);
}
void WiredTigerBeginTxnBlock::done() {
invariant(_rollback);
_rollback = false;
}
} // namespace mongo
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