mirror of https://gitee.com/bigwinds/arangodb
152 lines
4.7 KiB
C++
152 lines
4.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief wrapper for Aql transactions
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2004-2012 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 triAGENS GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2011-2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef TRIAGENS_UTILS_AQL_TRANSACTION_H
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#define TRIAGENS_UTILS_AQL_TRANSACTION_H 1
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namespace triagens {
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namespace arango {
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// -----------------------------------------------------------------------------
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// --SECTION-- class AqlTransaction
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// -----------------------------------------------------------------------------
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class Transaction {
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoDB
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoDB
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create the transaction
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////////////////////////////////////////////////////////////////////////////////
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AqlTransaction (const TRI_vocbase_col_t* vocbase, const vector<string>& collectionNames) :
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Transaction(vocbase), _trx(0), _collectionNames(collectionNames) {
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief end the transaction
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////////////////////////////////////////////////////////////////////////////////
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~AqlTransaction () {
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if (_trx != 0) {
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if (_trx->_status == TRI_TRANSACTION_RUNNING) {
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// auto abort
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abort();
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}
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TRI_FreeTransaction(_trx);
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_trx = 0;
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}
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}
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public:
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int begin () {
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if (_trx != 0) {
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// already started
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return TRI_ERROR_TRANSACTION_INVALD_STATE;
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}
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_trx = TRI_CreateTransaction(_vocbase->_transactionContext, TRI_TRANSACTION_READ_REPEATABLE, 0);
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if (_trx == 0) {
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return TRI_ERROR_OUT_OF_MEMORY;
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}
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for (size_t i = 0; i < _collectionNames.size(); ++i) {
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if (! TRI_AddCollectionTransaction(_trx, _collectionNames[i].c_str(), TRI_TRANSACTION_READ)) {
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return TRI_ERROR_INTERNAL;
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}
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}
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if (_trx->_status != TRI_TRANSACTION_CREATED) {
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return TRI_ERROR_TRANSACTION_INVALID_STATE;
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}
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int res = TRI_StartTransaction(_trx);
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return res;
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}
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int commit () {
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if (_trx == 0 || _trx->_status != TRI_TRANSACTION_RUNNING) {
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// not created or not running
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return TRI_ERROR_TRANSACTION_INVALD_STATE;
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}
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int res = TRI_FinishTransaction(_trx);
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return res;
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}
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int abort () {
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if (_trx == 0) {
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// transaction already ended or not created
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return TRI_ERROR_NO_ERROR;
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}
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if (_trx->_status != TRI_TRANSACTION_RUNNING) {
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return TRI_ERROR_TRANSACTION_INVALID_STATE;
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}
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int res = TRI_AbortTransaction(_trx);
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return res;
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}
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private:
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vector<string> _collectionNames;
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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};
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}
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}
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#endif
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|/// @page\\|// --SECTION--\\|/// @\\}\\)"
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// End:
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