libminifi/src/TimerDrivenSchedulingAgent.cpp

/**
 * @file TimerDrivenSchedulingAgent.cpp
 * TimerDrivenSchedulingAgent 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 "TimerDrivenSchedulingAgent.h"
#include <chrono>
#include <thread>
#include <memory>
#include <iostream>
#include "core/Property.h"

namespace org {
namespace apache {
namespace nifi {
namespace minifi {

utils::TaskRescheduleInfo TimerDrivenSchedulingAgent::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()) {
    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>(
        std::chrono::nanoseconds(processor->getSchedulingPeriodNano())));
  }
  return utils::TaskRescheduleInfo::Done();
}

} /* namespace minifi */
} /* namespace nifi */
} /* namespace apache */
} /* namespace org */