mirror of https://gitee.com/bigwinds/arangodb
73 lines
2.3 KiB
C++
73 lines
2.3 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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#include "IndexPoolFeature.h"
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#include "ApplicationFeatures/ApplicationServer.h"
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#include "Basics/ThreadPool.h"
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#include "ProgramOptions/ProgramOptions.h"
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using namespace arangodb;
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using namespace arangodb::application_features;
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using namespace arangodb::basics;
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using namespace arangodb::options;
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IndexPoolFeature::IndexPoolFeature(ApplicationServer* server)
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: ApplicationFeature(server, "IndexPool"),
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_indexThreads(2) {
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setOptional(false);
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requiresElevatedPrivileges(false);
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startsAfter("DatabasePath");
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startsAfter("EngineSelector");
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}
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void IndexPoolFeature::collectOptions(std::shared_ptr<ProgramOptions> options) {
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options->addSection("database", "Configure the database");
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options->addHiddenOption(
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"--database.index-threads",
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"threads to start for parallel background index creation",
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new UInt64Parameter(&_indexThreads));
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}
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void IndexPoolFeature::validateOptions(std::shared_ptr<ProgramOptions> options) {
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// some arbitrary limit
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if (_indexThreads > 128) {
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_indexThreads = 128;
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}
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}
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void IndexPoolFeature::start() {
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// create the index thread pool
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if (_indexThreads > 0) {
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_indexPool.reset(new ThreadPool(static_cast<size_t>(_indexThreads), "IndexBuilder"));
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}
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LOG(TRACE) << "starting " << _indexThreads << " index thread(s)";
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}
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void IndexPoolFeature::unprepare() {
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LOG(TRACE) << "stopping index thread(s)";
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// turn off index threads
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_indexPool.reset();
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}
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