bakaid commented on a change in pull request #605: MINIFICPP-550 - Implement RocksDB controller service and component st… URL: https://github.com/apache/nifi-minifi-cpp/pull/605#discussion_r389760968
########## File path: libminifi/src/controllers/keyvalue/AbstractAutoPersistingKeyValueStoreService.cpp ########## @@ -0,0 +1,133 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "controllers/keyvalue/AbstractAutoPersistingKeyValueStoreService.h" + +namespace org { +namespace apache { +namespace nifi { +namespace minifi { +namespace controllers { + +core::Property AbstractAutoPersistingKeyValueStoreService::AlwaysPersist( + core::PropertyBuilder::createProperty("Always Persist")->withDescription("Persist every change instead of persisting it periodically.") + ->isRequired(false)->withDefaultValue<bool>(false)->build()); +core::Property AbstractAutoPersistingKeyValueStoreService::AutoPersistenceInterval( + core::PropertyBuilder::createProperty("Auto Persistence Interval")->withDescription("The interval of the periodic task persisting all values. " + "Only used if Always Persist is false. " + "If set to 0 seconds, auto persistence will be disabled.") + ->isRequired(false)->withDefaultValue<core::TimePeriodValue>("1 min")->build()); + +AbstractAutoPersistingKeyValueStoreService::AbstractAutoPersistingKeyValueStoreService(const std::string& name, const std::string& id) + : KeyValueStoreService(name, id) + , PersistableKeyValueStoreService(name, id) + , always_persist_(false) + , auto_persistence_interval_(0U) + , running_(false) + , logger_(logging::LoggerFactory<AbstractAutoPersistingKeyValueStoreService>::getLogger()) { +} + +AbstractAutoPersistingKeyValueStoreService::AbstractAutoPersistingKeyValueStoreService(const std::string& name, utils::Identifier uuid /*= utils::Identifier()*/) + : KeyValueStoreService(name, uuid) + , PersistableKeyValueStoreService(name, uuid) + , always_persist_(false) + , auto_persistence_interval_(0U) + , running_(false) + , logger_(logging::LoggerFactory<AbstractAutoPersistingKeyValueStoreService>::getLogger()) { +} + +AbstractAutoPersistingKeyValueStoreService::~AbstractAutoPersistingKeyValueStoreService() { + notifyStop(); +} + +void AbstractAutoPersistingKeyValueStoreService::initialize() { + ControllerService::initialize(); + std::set<core::Property> supportedProperties; + supportedProperties.insert(AlwaysPersist); + supportedProperties.insert(AutoPersistenceInterval); + updateSupportedProperties(supportedProperties); +} + +void AbstractAutoPersistingKeyValueStoreService::onEnable() { + std::unique_lock<std::mutex> lock(persisting_mutex_); + + if (configuration_ == nullptr) { + logger_->log_debug("Cannot enable AbstractAutoPersistingKeyValueStoreService"); + return; + } + + std::string value; + if (!getProperty(AlwaysPersist.getName(), value)) { + logger_->log_error("Always Persist attribute is missing or invalid"); + } else { + utils::StringUtils::StringToBool(value, always_persist_); + } + if (!getProperty(AutoPersistenceInterval.getName(), value)) { + logger_->log_error("Auto Persistence Interval attribute is missing or invalid"); + } else { + core::TimeUnit unit; + if (!core::Property::StringToTime(value, auto_persistence_interval_, unit) || !core::Property::ConvertTimeUnitToMS(auto_persistence_interval_, unit, auto_persistence_interval_)) { + logger_->log_error("Auto Persistence Interval attribute is invalid"); + } + } + + if (!always_persist_ && auto_persistence_interval_ != 0U) { + if (!persisting_thread_.joinable()) { + logger_->log_trace("Starting auto persistence thread"); + running_ = true; + persisting_thread_ = std::thread(&AbstractAutoPersistingKeyValueStoreService::persistingThreadFunc, this); + } + } + + logger_->log_trace("Enabled AbstractAutoPersistingKeyValueStoreService"); +} + +void AbstractAutoPersistingKeyValueStoreService::notifyStop() { + if (persisting_thread_.joinable()) { + { + std::lock_guard<std::mutex> lock(persisting_mutex_); + running_ = false; + persisting_cv_.notify_one(); + } + persisting_thread_.join(); + } +} + +void AbstractAutoPersistingKeyValueStoreService::persistingThreadFunc() { + std::unique_lock<std::mutex> lock(persisting_mutex_); + + while (true) { + logger_->log_trace("Persisting thread is going to sleep for %d ms", auto_persistence_interval_); + persisting_cv_.wait_for(lock, std::chrono::milliseconds(auto_persistence_interval_), [this] { + return !running_; + }); + + if (!running_) { + logger_->log_trace("Stopping persistence thread"); + lock.unlock(); Review comment: True, will remove. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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