mirror of https://gitee.com/bigwinds/arangodb
97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_MMFILES_TRANSACTION_STATE_H
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#define ARANGOD_MMFILES_TRANSACTION_STATE_H 1
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#include "Basics/Common.h"
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#include "Basics/SmallVector.h"
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#include "StorageEngine/TransactionState.h"
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#include "Utils/Transaction.h"
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#include "Utils/TransactionHints.h"
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#include "VocBase/AccessMode.h"
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#include "VocBase/voc-types.h"
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struct TRI_vocbase_t;
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namespace rocksdb {
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class Transaction;
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}
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namespace arangodb {
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class LogicalCollection;
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struct MMFilesDocumentOperation;
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class MMFilesWalMarker;
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class Transaction;
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class TransactionCollection;
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/// @brief transaction type
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class MMFilesTransactionState final : public TransactionState {
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public:
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explicit MMFilesTransactionState(TRI_vocbase_t* vocbase);
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~MMFilesTransactionState();
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/// @brief begin a transaction
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int beginTransaction(TransactionHints hints, int nestingLevel) override;
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/// @brief commit a transaction
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int commitTransaction(Transaction* trx, int nestingLevel) override;
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/// @brief abort a transaction
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int abortTransaction(Transaction* trx, int nestingLevel) override;
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bool hasFailedOperations() const override {
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return (_hasOperations && _status == Transaction::Status::ABORTED);
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}
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/// @brief add a WAL operation for a transaction collection
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int addOperation(TRI_voc_rid_t, MMFilesDocumentOperation&, MMFilesWalMarker const* marker, bool&);
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private:
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/// @brief whether or not a marker needs to be written
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bool needWriteMarker(bool isBeginMarker) const {
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if (isBeginMarker) {
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return (!isReadOnlyTransaction() && !isSingleOperation());
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}
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return (_nestingLevel == 0 && _beginWritten &&
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!isReadOnlyTransaction() && !isSingleOperation());
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}
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/// @brief write WAL begin marker
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int writeBeginMarker();
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/// @brief write WAL abort marker
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int writeAbortMarker();
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/// @brief write WAL commit marker
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int writeCommitMarker();
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/// @brief free all operations for a transaction
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void freeOperations(arangodb::Transaction* activeTrx);
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};
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}
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#endif
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