mirror of https://gitee.com/bigwinds/arangodb
197 lines
7.9 KiB
C++
197 lines
7.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Class for arangodb's graph features. Wrapper around the graph informations
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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 2014-2015 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 Michael Hackstein
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/// @author Copyright 2014-2015, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_GRAPHS_H
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#define ARANGODB_GRAPHS_H 1
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#include "vocbase.h"
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#include "voc-types.h"
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namespace triagens {
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namespace arango {
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// -----------------------------------------------------------------------------
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// --SECTION-- Graph Class
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// -----------------------------------------------------------------------------
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class Graph {
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// -----------------------------------------------------------------------------
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// --SECTION-- constructor & destructor
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// -----------------------------------------------------------------------------
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public:
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Graph () {
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}
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~Graph () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the cids of all vertexCollections
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_set<std::string> _vertexColls;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the cids of all edgeCollections
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_set<std::string> _edgeColls;
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get the cids of all vertexCollections
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_set<std::string> const vertexCollections ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get the cids of all edgeCollections
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_set<std::string> const edgeCollections ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Add an edge collection to this graphs definition
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////////////////////////////////////////////////////////////////////////////////
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void addEdgeCollection (std::string);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Add a vertex collection to this graphs definition
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////////////////////////////////////////////////////////////////////////////////
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void addVertexCollection (std::string);
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};
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// -----------------------------------------------------------------------------
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// --SECTION-- Factory for graphs
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief This factory is a singleton
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////////////////////////////////////////////////////////////////////////////////
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class GraphFactory {
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief 2 level cache for graphs. level 1 selects database, level 2 selects graph
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_map<TRI_voc_tick_t,
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std::unordered_map<std::string, Graph>> _cache;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the instance
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////////////////////////////////////////////////////////////////////////////////
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static GraphFactory* _singleton;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Graph collection name
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////////////////////////////////////////////////////////////////////////////////
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static const std::string _graphs;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Graph collection edge definition attribute name
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////////////////////////////////////////////////////////////////////////////////
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static char const* _attrEdgeDefs;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Graph collection orphan list arribute name
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////////////////////////////////////////////////////////////////////////////////
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static char const* _attrOrphans;
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// -----------------------------------------------------------------------------
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// --SECTION-- protected constructor
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// -----------------------------------------------------------------------------
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protected:
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GraphFactory () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get the factory instance
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////////////////////////////////////////////////////////////////////////////////
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static GraphFactory* factory ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get an instance of Graph by Name. returns nullptr if graph is not existing
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////////////////////////////////////////////////////////////////////////////////
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Graph const& byName (TRI_vocbase_t*, std::string);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief invalidate the cache for the given graph. Has to be called if the
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/// Information of this graph has changed.
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////////////////////////////////////////////////////////////////////////////////
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void invalidateCache (TRI_vocbase_t*, std::string);
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};
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} // namespace arango
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} // namespace triagens
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#endif
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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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