mirror of https://gitee.com/bigwinds/arangodb
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2018 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 Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_TESTS_WAITING_EXECUTION_BLOCK_MOCK_H
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#define ARANGODB_TESTS_WAITING_EXECUTION_BLOCK_MOCK_H 1
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#include "Aql/ExecutionBlock.h"
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#include "Aql/ResourceUsage.h"
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#include <velocypack/Builder.h>
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namespace arangodb {
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namespace aql {
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class AqlItemBlock;
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class ExecutionEngine;
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class ExecutionNode;
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struct ResourceMonitor;
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namespace tests {
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/**
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* @brief A Execution block that simulates the WAITING, HASMORE, DONE API.
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*/
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class WaitingExecutionBlockMock final : public ExecutionBlock {
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public:
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/**
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* @brief Create a WAITING ExecutionBlockMock
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*
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* @param engine Required by API.
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* @param node Required by API.
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* @param data Must be a shared_ptr to an VPackArray.
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*/
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WaitingExecutionBlockMock(ExecutionEngine* engine,
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ExecutionNode const* node,
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std::shared_ptr<velocypack::Builder> data);
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/**
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* @brief Initialize the cursor. Return values will be alternating.
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*
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* @param items Will be ignored
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* @param pos Will be ignored
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*
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* @return First <WAITING, TRI_ERROR_NO_ERROR>
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* Second <DONE, TRI_ERROR_NO_ERROR>
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*/
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std::pair<arangodb::aql::ExecutionState, arangodb::Result> initializeCursor(
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arangodb::aql::AqlItemBlock* items, size_t pos) override;
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/**
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* @brief The return values are alternating. On non-WAITING case
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* it will return atMost many elements from _data.
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*
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*
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* @param atMost This many elements will be returned at Most
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*
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* @return First: <WAITING, nullptr>
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* Second: <HASMORE/DONE, _data-part>
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*/
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std::pair<arangodb::aql::ExecutionState,
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std::unique_ptr<arangodb::aql::AqlItemBlock>>
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getSome(size_t atMost) override;
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/**
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* @brief The return values are alternating. On non-WAITING case
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* it will return atMost, or whatever is not skipped over on data, whichever number is lower.
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*
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*
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* @param atMost This many elements will be skipped at most
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*
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* @return First: <WAITING, 0>
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* Second: <HASMORE/DONE, min(atMost,_data.length)>
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*/
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std::pair<arangodb::aql::ExecutionState, size_t> skipSome(
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size_t atMost
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) override;
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private:
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std::shared_ptr<velocypack::Builder> _data;
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ResourceMonitor _resourceMonitor;
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size_t _inflight;
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bool _hasWaited;
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};
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} // tests
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} // aql
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} // arangodb
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#endif
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