mirror of https://gitee.com/bigwinds/arangodb
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Michael Hackstein
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGOD_GRAPH_SINGLE_SERVER_EDGE_CURSOR_H
|
|
#define ARANGOD_GRAPH_SINGLE_SERVER_EDGE_CURSOR_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
#include "Graph/EdgeCursor.h"
|
|
#include <velocypack/StringRef.h>
|
|
|
|
namespace arangodb {
|
|
|
|
class LocalDocumentId;
|
|
struct OperationCursor;
|
|
class LogicalCollection;
|
|
|
|
namespace transaction {
|
|
class Methods;
|
|
}
|
|
|
|
namespace velocypack {
|
|
class Slice;
|
|
}
|
|
|
|
namespace graph {
|
|
struct BaseOptions;
|
|
struct SingleServerEdgeDocumentToken;
|
|
|
|
class SingleServerEdgeCursor final : public EdgeCursor {
|
|
private:
|
|
BaseOptions* _opts;
|
|
transaction::Methods* _trx;
|
|
std::vector<std::vector<OperationCursor*>> _cursors;
|
|
size_t _currentCursor;
|
|
size_t _currentSubCursor;
|
|
std::vector<LocalDocumentId> _cache;
|
|
size_t _cachePos;
|
|
std::vector<size_t> const* _internalCursorMapping;
|
|
|
|
public:
|
|
SingleServerEdgeCursor(BaseOptions* options, size_t,
|
|
std::vector<size_t> const* mapping = nullptr);
|
|
|
|
~SingleServerEdgeCursor();
|
|
|
|
bool next(EdgeCursor::Callback const& callback) override;
|
|
|
|
void readAll(EdgeCursor::Callback const& callback) override;
|
|
|
|
std::vector<std::vector<OperationCursor*>>& getCursors() { return _cursors; }
|
|
|
|
/// @brief number of HTTP requests performed. always 0 in single server
|
|
size_t httpRequests() const override { return 0; }
|
|
|
|
private:
|
|
// returns false if cursor can not be further advanced
|
|
bool advanceCursor(OperationCursor*& cursor, std::vector<OperationCursor*>& cursorSet);
|
|
|
|
void getDocAndRunCallback(OperationCursor*, EdgeCursor::Callback const& callback);
|
|
};
|
|
} // namespace graph
|
|
} // namespace arangodb
|
|
|
|
#endif
|