mirror of https://gitee.com/bigwinds/arangodb
101 lines
3.2 KiB
C++
101 lines
3.2 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_TRANSACTION_V8_CONTEXT_H
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#define ARANGOD_TRANSACTION_V8_CONTEXT_H 1
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#include "Basics/Common.h"
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#include "Context.h"
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struct TRI_vocbase_t;
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namespace arangodb {
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class TransactionState;
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namespace transaction {
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class V8Context final : public Context {
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public:
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/// @brief create the context
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V8Context(TRI_vocbase_t& vocbase, bool embeddable);
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/// @brief destroy the context
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~V8Context() = default;
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/// @brief order a custom type handler
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std::shared_ptr<arangodb::velocypack::CustomTypeHandler> orderCustomTypeHandler() override final;
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/// @brief get parent transaction (if any)
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TransactionState* getParentTransaction() const override;
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/// @brief register the transaction in the context
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void registerTransaction(TransactionState* trx) override;
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/// @brief return the resolver
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CollectionNameResolver const& resolver() override final;
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/// @brief unregister the transaction from the context
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void unregisterTransaction() noexcept override;
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/// @brief whether or not the transaction is embeddable
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bool isEmbeddable() const override;
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/// @brief make this transaction context a global context
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void makeGlobal();
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/// @brief whether or not the transaction context is a global one
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bool isGlobal() const;
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/// @brief return parent transaction state or none
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static TransactionState* getParentState();
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/// @brief check whether the transaction is embedded
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static bool isEmbedded();
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/// @brief create a context
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static std::shared_ptr<transaction::V8Context> Create(TRI_vocbase_t& vocbase, bool embeddable);
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/// @brief create a V8 transaction context if we are in a V8 isolate, and a
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/// standlone transaction context otherwise
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static std::shared_ptr<transaction::Context> CreateWhenRequired(TRI_vocbase_t& vocbase,
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bool embeddable);
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private:
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/// @brief the v8 thread-local "global" transaction context
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transaction::V8Context* _sharedTransactionContext;
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transaction::V8Context* _mainScope;
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/// @brief the currently ongoing transaction
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TransactionState* _currentTransaction;
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/// @brief whether or not further transactions can be embedded
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bool const _embeddable;
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};
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} // namespace transaction
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} // namespace arangodb
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#endif
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