| // Copyright (c) 2011, François Saint-Jacques |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // * Neither the name of the disruptor-- nor the |
| // names of its contributors may be used to endorse or promote products |
| // derived from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL FRANÇOIS SAINT-JACQUES BE LIABLE FOR ANY |
| // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef DISRUPTOR_EVENT_PROCESSOR_H_ // NOLINT |
| #define DISRUPTOR_EVENT_PROCESSOR_H_ // NOLINT |
| |
| #include <stdexcept> |
| #include "ring_buffer.h" |
| |
| namespace rocketmq { |
| |
| template <typename T> |
| class NoOpEventProcessor : public EventProcessorInterface<T> { |
| public: |
| NoOpEventProcessor(RingBuffer<T>* ring_buffer) : |
| ring_buffer_(ring_buffer) { } |
| |
| virtual Sequence* GetSequence() { |
| return ring_buffer_->GetSequencePtr(); |
| } |
| |
| virtual void Halt() {} |
| |
| virtual void Run() {} |
| |
| private: |
| RingBuffer<T>* ring_buffer_; |
| }; |
| |
| template <typename T> |
| class BatchEventProcessor : public boost::noncopyable, public EventProcessorInterface<T> { |
| public: |
| BatchEventProcessor(RingBuffer<T>* ring_buffer, |
| SequenceBarrierInterface* sequence_barrier, |
| EventHandlerInterface<T>* event_handler, |
| ExceptionHandlerInterface<T>* exception_handler) : |
| running_(false), |
| ring_buffer_(ring_buffer), |
| sequence_barrier_(sequence_barrier), |
| event_handler_(event_handler), |
| exception_handler_(exception_handler) {} |
| |
| |
| virtual Sequence* GetSequence() { return &sequence_; } |
| |
| virtual void Halt() { |
| running_.store(false); |
| sequence_barrier_->Alert(); |
| } |
| |
| virtual void Run() { |
| if (running_.load()) |
| { |
| printf("Thread is already running\r\n"); |
| } |
| running_.store(true); |
| sequence_barrier_->ClearAlert(); |
| event_handler_->OnStart(); |
| |
| T* event = NULL; |
| int64_t next_sequence = sequence_.sequence() + 1L; |
| |
| while (true) { |
| try { |
| int64_t avalaible_sequence = \ |
| sequence_barrier_->WaitFor(next_sequence, 300*1000);//wait 300 milliseconds to avoid taskThread blocking on BlockingStrategy::WaitFor when shutdown |
| //rocketmq::LOG_INFO("avalaible_sequence:%d, next_sequence:%d", avalaible_sequence,next_sequence); |
| while (next_sequence <= avalaible_sequence) { |
| event = ring_buffer_->Get(next_sequence); |
| event_handler_->OnEvent(next_sequence, |
| next_sequence == avalaible_sequence, event); |
| next_sequence++; |
| } |
| |
| sequence_.set_sequence(next_sequence - 1L); |
| } catch(const AlertException& e) { |
| //rocketmq::LOG_INFO("catch alertException"); |
| if (!running_.load()) |
| break; |
| } catch(const std::exception& e) { |
| //rocketmq::LOG_ERROR("catch stdException"); |
| exception_handler_->Handle(e, next_sequence, event); |
| sequence_.set_sequence(next_sequence); |
| next_sequence++; |
| } |
| } |
| //rocketmq::LOG_INFO("BatchEventProcessor shutdown"); |
| event_handler_->OnShutdown(); |
| running_.store(false); |
| } |
| |
| void operator()() { Run(); } |
| |
| private: |
| boost::atomic<bool> running_; |
| Sequence sequence_; |
| |
| RingBuffer<T>* ring_buffer_; |
| SequenceBarrierInterface* sequence_barrier_; |
| EventHandlerInterface<T>* event_handler_; |
| ExceptionHandlerInterface<T>* exception_handler_; |
| |
| }; |
| |
| |
| }; // namespace rocketmq |
| |
| #endif // DISRUPTOR_EVENT_PROCESSOR_H_ NOLINT |