mirror of https://gitee.com/bigwinds/arangodb
121 lines
3.8 KiB
C++
121 lines
3.8 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_VOCBASE_LOGICAL_VIEW_H
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#define ARANGOD_VOCBASE_LOGICAL_VIEW_H 1
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#include "LogicalDataSource.h"
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#include "Basics/Common.h"
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#include "Basics/ReadWriteLock.h"
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#include "Basics/Result.h"
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#include "VocBase/ViewImplementation.h"
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#include "VocBase/voc-types.h"
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#include <velocypack/Buffer.h>
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namespace arangodb {
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namespace velocypack {
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class Slice;
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}
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namespace aql {
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class ExecutionPlan;
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struct ExecutionContext;
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}
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class PhysicalView;
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class LogicalView final: public LogicalDataSource {
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friend struct ::TRI_vocbase_t;
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public:
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LogicalView(TRI_vocbase_t*, velocypack::Slice const&);
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~LogicalView();
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//////////////////////////////////////////////////////////////////////////////
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/// @brief the category representing a logical view
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//////////////////////////////////////////////////////////////////////////////
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static Category const& category() noexcept;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief invoke visitor on all collections that a view will return
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/// @return visitation was successful
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//////////////////////////////////////////////////////////////////////////////
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bool visitCollections(
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std::function<bool(TRI_voc_cid_t)> const& visitor
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) const {
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return _implementation && _implementation->visitCollections(visitor);
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}
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protected: // If you need a copy outside the class, use clone below.
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explicit LogicalView(LogicalView const&);
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private:
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LogicalView& operator=(LogicalView const&) = delete;
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public:
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LogicalView() = delete;
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std::unique_ptr<LogicalView> clone() {
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auto p = new LogicalView(*this);
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return std::unique_ptr<LogicalView>(p);
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}
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PhysicalView* getPhysical() const { return _physical.get(); }
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ViewImplementation* getImplementation() const {
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return _implementation.get();
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}
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virtual void drop() override;
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virtual Result rename(std::string&& newName, bool doSync) override;
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// SECTION: Serialization
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void toVelocyPack(velocypack::Builder&, bool includeProperties = false,
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bool includeSystem = false) const;
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// Update this view.
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arangodb::Result updateProperties(velocypack::Slice const&, bool, bool);
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/// @brief Persist the connected physical view.
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/// This should be called AFTER the view is successfully
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/// created and only on Sinlge/DBServer
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void persistPhysicalView();
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/// @brief Create implementation object using factory method
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void spawnImplementation(ViewCreator creator,
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arangodb::velocypack::Slice const& parameters,
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bool isNew);
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private:
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// SECTION: Meta Information
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std::unique_ptr<PhysicalView> _physical;
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std::unique_ptr<ViewImplementation> _implementation;
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mutable basics::ReadWriteLock _lock; // lock protecting the status and name
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mutable basics::ReadWriteLock _infoLock; // lock protecting the properties
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};
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} // namespace arangodb
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#endif |