mirror of https://gitee.com/bigwinds/arangodb
137 lines
4.6 KiB
C++
137 lines
4.6 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 Dr. Frank Celler
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////////////////////////////////////////////////////////////////////////////////
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#include "CacheManagerFeature.h"
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#ifdef _WIN32
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#include <stdio.h>
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#include <windows.h>
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#endif
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#include "ApplicationFeatures/ApplicationServer.h"
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#include "Basics/ArangoGlobalContext.h"
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#include "Basics/application-exit.h"
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#include "Basics/process-utils.h"
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#include "Cache/CacheManagerFeatureThreads.h"
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#include "Cache/Manager.h"
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#include "Cluster/ServerState.h"
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#include "FeaturePhases/BasicFeaturePhaseServer.h"
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#include "Logger/LogMacros.h"
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#include "Logger/Logger.h"
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#include "Logger/LoggerStream.h"
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#include "ProgramOptions/ProgramOptions.h"
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#include "ProgramOptions/Section.h"
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#include "Scheduler/Scheduler.h"
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#include "Scheduler/SchedulerFeature.h"
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using namespace arangodb::application_features;
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using namespace arangodb::basics;
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using namespace arangodb::cache;
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using namespace arangodb::options;
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namespace arangodb {
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Manager* CacheManagerFeature::MANAGER = nullptr;
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const uint64_t CacheManagerFeature::minRebalancingInterval = 500 * 1000;
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CacheManagerFeature::CacheManagerFeature(application_features::ApplicationServer& server)
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: ApplicationFeature(server, "CacheManager"),
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_manager(nullptr),
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_rebalancer(nullptr),
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_cacheSize((TRI_PhysicalMemory >= (static_cast<uint64_t>(4) << 30))
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? static_cast<uint64_t>(
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(TRI_PhysicalMemory - (static_cast<uint64_t>(2) << 30)) * 0.25)
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: (256 << 20)),
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_rebalancingInterval(static_cast<uint64_t>(2 * 1000 * 1000)) {
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setOptional(true);
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startsAfter<BasicFeaturePhaseServer>();
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}
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CacheManagerFeature::~CacheManagerFeature() = default;
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void CacheManagerFeature::collectOptions(std::shared_ptr<options::ProgramOptions> options) {
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options->addSection("cache", "Configure the hash cache");
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options->addOption("--cache.size", "size of cache in bytes",
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new UInt64Parameter(&_cacheSize),
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arangodb::options::makeFlags(arangodb::options::Flags::Dynamic));
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options->addOption("--cache.rebalancing-interval",
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"microseconds between rebalancing attempts",
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new UInt64Parameter(&_rebalancingInterval));
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}
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void CacheManagerFeature::validateOptions(std::shared_ptr<options::ProgramOptions>) {
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if (_cacheSize < Manager::minSize) {
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LOG_TOPIC("75778", FATAL, arangodb::Logger::FIXME)
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<< "invalid value for `--cache.size', need at least " << Manager::minSize;
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FATAL_ERROR_EXIT();
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}
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if (_rebalancingInterval < (CacheManagerFeature::minRebalancingInterval)) {
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LOG_TOPIC("8bb45", FATAL, arangodb::Logger::FIXME)
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<< "invalid value for `--cache.rebalancing-interval', need at least "
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<< (CacheManagerFeature::minRebalancingInterval);
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FATAL_ERROR_EXIT();
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}
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}
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void CacheManagerFeature::start() {
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if (ServerState::instance()->isAgent()) {
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// we intentionally do not activate the cache on an agency node, as it
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// is not needed there
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return;
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}
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auto scheduler = SchedulerFeature::SCHEDULER;
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auto postFn = [scheduler](std::function<void()> fn) -> bool {
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try {
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return scheduler->queue(RequestLane::INTERNAL_LOW, fn);
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} catch (...) {
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return false;
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}
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};
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_manager.reset(new Manager(postFn, _cacheSize));
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MANAGER = _manager.get();
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_rebalancer.reset(new CacheRebalancerThread(server(), _manager.get(), _rebalancingInterval));
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_rebalancer->start();
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LOG_TOPIC("13894", DEBUG, Logger::STARTUP) << "cache manager has started";
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}
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void CacheManagerFeature::beginShutdown() {
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if (_manager != nullptr) {
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_manager->beginShutdown();
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_rebalancer->beginShutdown();
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}
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}
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void CacheManagerFeature::stop() {
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if (_manager != nullptr) {
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_manager->shutdown();
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}
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}
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void CacheManagerFeature::unprepare() { MANAGER = nullptr; }
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} // namespace arangodb
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