mirror of https://gitee.com/bigwinds/arangodb
128 lines
5.2 KiB
C++
128 lines
5.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Aql, collection scanners
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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 2014 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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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "CollectionScanner.h"
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using namespace triagens::aql;
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// -----------------------------------------------------------------------------
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// --SECTION-- struct CollectionScanner
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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CollectionScanner::CollectionScanner (triagens::arango::AqlTransaction* trx,
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TRI_transaction_collection_t* trxCollection)
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: trx(trx),
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trxCollection(trxCollection),
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totalCount(0) {
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}
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CollectionScanner::~CollectionScanner () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- struct RandomCollectionScanner
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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RandomCollectionScanner::RandomCollectionScanner (triagens::arango::AqlTransaction* trx,
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TRI_transaction_collection_t* trxCollection)
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: CollectionScanner(trx, trxCollection),
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step(0) {
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}
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int RandomCollectionScanner::scan (std::vector<TRI_doc_mptr_copy_t>& docs,
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size_t batchSize) {
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return trx->readRandom(trxCollection,
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docs,
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initialPosition,
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position,
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static_cast<uint64_t>(batchSize),
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step,
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totalCount);
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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void RandomCollectionScanner::reset () {
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initialPosition.reset();
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position.reset();
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step = 0;
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- struct LinearCollectionScanner
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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LinearCollectionScanner::LinearCollectionScanner (triagens::arango::AqlTransaction* trx,
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TRI_transaction_collection_t* trxCollection)
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: CollectionScanner(trx, trxCollection) {
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}
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int LinearCollectionScanner::scan (std::vector<TRI_doc_mptr_copy_t>& docs,
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size_t batchSize) {
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return trx->readIncremental(trxCollection,
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docs,
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position,
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static_cast<uint64_t>(batchSize),
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0,
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UINT64_MAX,
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totalCount);
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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void LinearCollectionScanner::reset () {
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position.reset();
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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