| /** |
| * @file SchedulingAgent.cpp |
| * SchedulingAgent 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 "SchedulingAgent.h" |
| #include <chrono> |
| #include <thread> |
| #include <utility> |
| #include <memory> |
| #include <iostream> |
| #include "Exception.h" |
| #include "core/Processor.h" |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| |
| bool SchedulingAgent::hasWorkToDo(std::shared_ptr<core::Processor> processor) { |
| // Whether it has work to do |
| if (processor->getTriggerWhenEmpty() || !processor->hasIncomingConnections() || processor->flowFilesQueued()) |
| return true; |
| else |
| return false; |
| } |
| |
| std::future<uint64_t> SchedulingAgent::enableControllerService(std::shared_ptr<core::controller::ControllerServiceNode> &serviceNode) { |
| logger_->log_info("Enabling CSN in SchedulingAgent %s", serviceNode->getName()); |
| // reference the enable function from serviceNode |
| std::function< uint64_t()> f_ex = [serviceNode] { |
| serviceNode->enable(); |
| return 0; |
| }; |
| |
| // only need to run this once. |
| std::unique_ptr<SingleRunMonitor> monitor = std::unique_ptr<SingleRunMonitor>(new SingleRunMonitor(&running_)); |
| utils::Worker<uint64_t> functor(f_ex, serviceNode->getUUIDStr(), std::move(monitor)); |
| // move the functor into the thread pool. While a future is returned |
| // we aren't terribly concerned with the result. |
| std::future<uint64_t> future; |
| thread_pool_.execute(std::move(functor), future); |
| future.wait(); |
| return future; |
| } |
| |
| std::future<uint64_t> SchedulingAgent::disableControllerService(std::shared_ptr<core::controller::ControllerServiceNode> &serviceNode) { |
| logger_->log_info("Disabling CSN in SchedulingAgent %s", serviceNode->getName()); |
| // reference the disable function from serviceNode |
| std::function< uint64_t()> f_ex = [serviceNode] { |
| serviceNode->disable(); |
| return 0; |
| }; |
| |
| // only need to run this once. |
| std::unique_ptr<SingleRunMonitor> monitor = std::unique_ptr<SingleRunMonitor>(new SingleRunMonitor(&running_)); |
| utils::Worker<uint64_t> functor(f_ex, serviceNode->getUUIDStr(), std::move(monitor)); |
| |
| // move the functor into the thread pool. While a future is returned |
| // we aren't terribly concerned with the result. |
| std::future<uint64_t> future; |
| thread_pool_.execute(std::move(functor), future); |
| future.wait(); |
| return future; |
| } |
| |
| bool SchedulingAgent::hasTooMuchOutGoing(std::shared_ptr<core::Processor> processor) { |
| return processor->flowFilesOutGoingFull(); |
| } |
| |
| bool SchedulingAgent::onTrigger(const std::shared_ptr<core::Processor> &processor, const std::shared_ptr<core::ProcessContext> &processContext, |
| const std::shared_ptr<core::ProcessSessionFactory> &sessionFactory) { |
| if (processor->isYield()) { |
| logger_->log_debug("Not running %s since it must yield", processor->getName()); |
| return false; |
| } |
| |
| // No need to yield, reset yield expiration to 0 |
| processor->clearYield(); |
| |
| if (!hasWorkToDo(processor)) { |
| // No work to do, yield |
| return true; |
| } |
| if (hasTooMuchOutGoing(processor)) { |
| logger_->log_debug("backpressure applied because too much outgoing for %s", processor->getUUIDStr()); |
| // need to apply backpressure |
| return true; |
| } |
| |
| processor->incrementActiveTasks(); |
| try { |
| processor->onTrigger(processContext, sessionFactory); |
| processor->decrementActiveTask(); |
| } catch (Exception &exception) { |
| // Normal exception |
| logger_->log_debug("Caught Exception %s", exception.what()); |
| processor->decrementActiveTask(); |
| } catch (std::exception &exception) { |
| logger_->log_debug("Caught Exception %s", exception.what()); |
| processor->yield(admin_yield_duration_); |
| processor->decrementActiveTask(); |
| } catch (...) { |
| logger_->log_debug("Caught Exception during SchedulingAgent::onTrigger"); |
| processor->yield(admin_yield_duration_); |
| processor->decrementActiveTask(); |
| } |
| |
| return false; |
| } |
| |
| } /* namespace minifi */ |
| } /* namespace nifi */ |
| } /* namespace apache */ |
| } /* namespace org */ |