mirror of https://gitee.com/bigwinds/arangodb
84 lines
3.0 KiB
C++
84 lines
3.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2016 ArangoDB 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 ARANGODB_REST_SERVER_VIEW_TYPES_FEATURE_H
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#define ARANGODB_REST_SERVER_VIEW_TYPES_FEATURE_H 1
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#include "ApplicationFeatures/ApplicationFeature.h"
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#include "VocBase/LogicalView.h"
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namespace arangodb {
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////////////////////////////////////////////////////////////////////////////////
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/// @brief LogicalView factory for both end-user and internal instantiation
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////////////////////////////////////////////////////////////////////////////////
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struct ViewFactory {
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virtual ~ViewFactory() = default; // define to silence warning
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//////////////////////////////////////////////////////////////////////////////
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/// @brief LogicalView factory for end-user validation instantiation and
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/// persistence
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/// @return if success then 'view' is set, else 'view' state is undefined
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//////////////////////////////////////////////////////////////////////////////
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virtual Result create(
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LogicalView::ptr& view,
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TRI_vocbase_t& vocbase,
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velocypack::Slice const& definition
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) const = 0;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief LogicalView factory for internal instantiation only
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//////////////////////////////////////////////////////////////////////////////
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virtual Result instantiate(
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LogicalView::ptr& view,
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TRI_vocbase_t& vocbase,
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velocypack::Slice const& definition,
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uint64_t planVersion // cluster plan version ('0' by default for non-cluster)
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) const = 0;
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};
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class ViewTypesFeature final: public application_features::ApplicationFeature {
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public:
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explicit ViewTypesFeature(application_features::ApplicationServer& server);
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/// @return 'factory' for 'type' was added successfully
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Result emplace(
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LogicalDataSource::Type const& type,
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ViewFactory const& factory
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);
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/// @return factory for the specified type or a failing placeholder if no such type
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ViewFactory const& factory(
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LogicalDataSource::Type const& type
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) const noexcept;
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static std::string const& name();
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void prepare() override final;
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void unprepare() override final;
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private:
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std::unordered_map<LogicalDataSource::Type const*, ViewFactory const*> _factories;
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};
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} // arangodb
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#endif |