mirror of https://gitee.com/bigwinds/arangodb
140 lines
4.4 KiB
C++
140 lines
4.4 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 Max Neunhoeffer
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////////////////////////////////////////////////////////////////////////////////
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#include "BlocksWithClients.h"
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#include "Aql/AqlItemBlock.h"
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#include "Aql/AqlTransaction.h"
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#include "Aql/AqlValue.h"
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#include "Aql/BlockCollector.h"
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#include "Aql/Collection.h"
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#include "Aql/ExecutionEngine.h"
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#include "Aql/ExecutionStats.h"
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#include "Aql/InputAqlItemRow.h"
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#include "Aql/Query.h"
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#include "Basics/Exceptions.h"
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#include "Basics/StaticStrings.h"
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#include "Basics/StringBuffer.h"
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#include "Basics/StringUtils.h"
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#include "Basics/VelocyPackHelper.h"
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#include "Cluster/ClusterInfo.h"
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#include "Cluster/ServerState.h"
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#include "Scheduler/SchedulerFeature.h"
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#include "Transaction/Methods.h"
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#include "Transaction/StandaloneContext.h"
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#include "Utils/SingleCollectionTransaction.h"
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#include "VocBase/KeyGenerator.h"
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#include "VocBase/LogicalCollection.h"
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#include "VocBase/ticks.h"
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#include "VocBase/vocbase.h"
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#include <velocypack/Builder.h>
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#include <velocypack/Collection.h>
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#include <velocypack/Parser.h>
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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using namespace arangodb;
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using namespace arangodb::aql;
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using VelocyPackHelper = arangodb::basics::VelocyPackHelper;
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using StringBuffer = arangodb::basics::StringBuffer;
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BlocksWithClients::BlocksWithClients(ExecutionEngine* engine, ExecutionNode const* ep,
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std::vector<std::string> const& shardIds)
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: ExecutionBlock(engine, ep),
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_nrClients(shardIds.size()),
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_type(ScatterNode::ScatterType::SHARD),
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_wasShutdown(false) {
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_shardIdMap.reserve(_nrClients);
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for (size_t i = 0; i < _nrClients; i++) {
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_shardIdMap.try_emplace(shardIds[i], i);
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}
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auto scatter = ExecutionNode::castTo<ScatterNode const*>(ep);
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TRI_ASSERT(scatter != nullptr);
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_type = scatter->getScatterType();
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}
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std::pair<ExecutionState, bool> BlocksWithClients::getBlock(size_t atMost) {
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if (_engine->getQuery()->killed()) {
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THROW_ARANGO_EXCEPTION(TRI_ERROR_QUERY_KILLED);
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}
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auto res = _dependencies[0]->getSome(atMost);
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if (res.first == ExecutionState::WAITING) {
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return {res.first, false};
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}
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TRI_IF_FAILURE("ExecutionBlock::getBlock") {
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THROW_ARANGO_EXCEPTION(TRI_ERROR_DEBUG);
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}
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_upstreamState = res.first;
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if (res.second != nullptr) {
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_buffer.emplace_back(std::move(res.second));
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return {res.first, true};
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}
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return {res.first, false};
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}
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/// @brief shutdown
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std::pair<ExecutionState, Result> BlocksWithClients::shutdown(int errorCode) {
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if (_wasShutdown) {
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return {ExecutionState::DONE, TRI_ERROR_NO_ERROR};
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}
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auto res = ExecutionBlock::shutdown(errorCode);
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if (res.first == ExecutionState::WAITING) {
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return res;
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}
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_wasShutdown = true;
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return res;
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}
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/// @brief getClientId: get the number <clientId> (used internally)
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/// corresponding to <shardId>
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size_t BlocksWithClients::getClientId(std::string const& shardId) const {
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if (shardId.empty()) {
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
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"got empty distribution id");
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}
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auto it = _shardIdMap.find(shardId);
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if (it == _shardIdMap.end()) {
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std::string message("AQL: unknown distribution id ");
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message.append(shardId);
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, message);
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}
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return it->second;
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}
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std::pair<ExecutionState, SharedAqlItemBlockPtr> BlocksWithClients::getSome(size_t) {
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TRI_ASSERT(false);
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THROW_ARANGO_EXCEPTION(TRI_ERROR_NOT_IMPLEMENTED);
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}
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std::pair<ExecutionState, size_t> BlocksWithClients::skipSome(size_t) {
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TRI_ASSERT(false);
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THROW_ARANGO_EXCEPTION(TRI_ERROR_NOT_IMPLEMENTED);
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}
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