| /** |
| * @file CronDrivenSchedulingAgent.cpp |
| * CronDrivenSchedulingAgent class implementation |
| * |
| * 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 "CronDrivenSchedulingAgent.h" |
| #include <chrono> |
| #include <memory> |
| #include <thread> |
| #include <iostream> |
| #include "core/Processor.h" |
| #include "core/ProcessContext.h" |
| #include "core/ProcessSessionFactory.h" |
| #include "core/Property.h" |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| |
| utils::TaskRescheduleInfo CronDrivenSchedulingAgent::run(const std::shared_ptr<core::Processor> &processor, const std::shared_ptr<core::ProcessContext> &processContext, |
| const std::shared_ptr<core::ProcessSessionFactory> &sessionFactory) { |
| if (this->running_ && processor->isRunning()) { |
| std::chrono::system_clock::time_point leap_nanos; |
| auto uuidStr = processor->getUUIDStr(); |
| std::chrono::system_clock::time_point result; |
| std::chrono::system_clock::time_point from = std::chrono::system_clock::now(); |
| { |
| std::lock_guard<std::mutex> locK(mutex_); |
| |
| auto sched_f = schedules_.find(uuidStr); |
| if (sched_f != std::end(schedules_)) { |
| result = last_exec_[uuidStr]; |
| if (from >= result) { |
| result = sched_f->second.cron_to_next(from); |
| last_exec_[uuidStr] = result; |
| } else { |
| // we may be woken up a little early so that we can honor our time. |
| // in this case we can return the next time to run with the expectation |
| // that the wakeup mechanism gets more granular. |
| return utils::TaskRescheduleInfo::RetryIn(std::chrono::duration_cast<std::chrono::milliseconds>(result - from)); |
| } |
| } else { |
| Bosma::Cron schedule(processor->getCronPeriod()); |
| result = schedule.cron_to_next(from); |
| last_exec_[uuidStr] = result; |
| schedules_.insert(std::make_pair(uuidStr, schedule)); |
| } |
| } |
| |
| if (result > from) { |
| bool shouldYield = this->onTrigger(processor, processContext, sessionFactory); |
| |
| if (processor->isYield()) { |
| // Honor the yield |
| return utils::TaskRescheduleInfo::RetryIn(std::chrono::milliseconds(processor->getYieldTime())); |
| } else if (shouldYield && this->bored_yield_duration_ > 0) { |
| // No work to do or need to apply back pressure |
| return utils::TaskRescheduleInfo::RetryIn(std::chrono::milliseconds(this->bored_yield_duration_)); |
| } |
| } |
| return utils::TaskRescheduleInfo::RetryIn(std::chrono::duration_cast<std::chrono::milliseconds>(result - from)); |
| } |
| return utils::TaskRescheduleInfo::Done(); |
| } |
| |
| } /* namespace minifi */ |
| } /* namespace nifi */ |
| } /* namespace apache */ |
| } /* namespace org */ |