EndPathExecutor.cc

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#include "art/Framework/Core/EndPathExecutor.h"
// vim: set sw=2 expandtab :

#include "art/Framework/Core/OutputFileGranularity.h"
#include "art/Framework/Core/OutputFileStatus.h"
#include "art/Framework/Core/OutputWorker.h"
#include "art/Framework/Core/PathManager.h"
#include "art/Framework/Core/PathsInfo.h"
#include "art/Framework/Core/UpdateOutputCallbacks.h"
#include "art/Framework/Principal/EventPrincipal.h"
#include "art/Framework/Principal/RangeSetHandler.h"
#include "art/Framework/Principal/Worker.h"
#include "art/Persistency/Provenance/PathContext.h"
#include "art/Persistency/Provenance/ScheduleContext.h"
#include "art/Utilities/GlobalTaskGroup.h"
#include "art/Utilities/ScheduleID.h"
#include "art/Utilities/TaskDebugMacros.h"
#include "art/Utilities/Transition.h"
#include "canvas/Utilities/Exception.h"
#include "hep_concurrency/WaitingTask.h"
#include "messagefacility/MessageLogger/MessageLogger.h"
#include "range/v3/view.hpp"

#include <memory>
#include <type_traits>
#include <utility>
#include <vector>

using namespace hep::concurrency;
using namespace std;

namespace {
  auto
  unique_workers(art::PathsInfo const& pinfo)
  {
    using namespace ::ranges;
    return pinfo.workers() | views::values | views::indirect |
           views::filter([](auto const& worker) { return worker.isUnique(); });
  }
}

namespace art {

  EndPathExecutor::EndPathExecutor(ScheduleID const sid,
                                   PathManager& pm,
                                   ActionTable const& actionTable,
                                   UpdateOutputCallbacks& outputCallbacks,
                                   GlobalTaskGroup& group)
    : sc_{sid}
    , actionTable_{actionTable}
    , endPathInfo_{pm.endPathInfo(sid)}
    , taskGroup_{group}
  {
    for (auto const& worker :
         endPathInfo_.workers() | ::ranges::views::values) {
      assert(sid == worker->scheduleID());
      if (auto owp = std::dynamic_pointer_cast<OutputWorker>(worker)) {
        outputWorkers_.emplace_back(owp.get());
      }
    }
    outputWorkersToOpen_.insert(outputWorkers_.cbegin(), outputWorkers_.cend());
    outputCallbacks.registerCallback(
      [this](auto const& tables) { selectProducts(tables); });
  }

  void
  EndPathExecutor::beginJob(detail::SharedResources const& resources)
  {
    for (auto& worker : unique_workers(endPathInfo_)) {
      worker.beginJob(resources);
    }
  }

  void
  EndPathExecutor::endJob()
  {
    Exception error{errors::EndJobFailure};
    // FIXME: There seems to be little value-added by the catch and rethrow
    // here.
    for (auto& worker : unique_workers(endPathInfo_)) {
      try {
        worker.endJob();
      }
      catch (cet::exception& e) {
        error << "cet::exception caught in Schedule::endJob\n"
              << e.explain_self();
        throw error;
      }
      catch (exception& e) {
        error << "Standard library exception caught in Schedule::endJob\n"
              << e.what();
        throw error;
      }
      catch (...) {
        error << "Unknown exception caught in Schedule::endJob\n";
        throw error;
      }
    }
  }

  void
  EndPathExecutor::selectProducts(ProductTables const& tables)
  {
    for (auto ow : outputWorkers_) {
      ow->selectProducts(tables);
    }
  }

  void
  EndPathExecutor::respondToOpenInputFile(FileBlock const& fb)
  {
    for (auto& worker : unique_workers(endPathInfo_)) {
      worker.respondToOpenInputFile(fb);
    }
  }

  void
  EndPathExecutor::respondToCloseInputFile(FileBlock const& fb)
  {
    for (auto& worker : unique_workers(endPathInfo_)) {
      worker.respondToCloseInputFile(fb);
    }
  }

  void
  EndPathExecutor::respondToOpenOutputFiles(FileBlock const& fb)
  {
    for (auto& worker : unique_workers(endPathInfo_)) {
      worker.respondToOpenOutputFiles(fb);
    }
  }

  void
  EndPathExecutor::respondToCloseOutputFiles(FileBlock const& fb)
  {
    for (auto& worker : unique_workers(endPathInfo_)) {
      worker.respondToCloseOutputFiles(fb);
    }
  }

  bool
  EndPathExecutor::someOutputsOpen() const
  {
    return any_of(outputWorkers_.cbegin(), outputWorkers_.cend(), [](auto ow) {
      return ow->fileIsOpen();
    });
  }

  void
  EndPathExecutor::closeAllOutputFiles()
  {
    for (auto ow : outputWorkers_) {
      ow->closeFile();
    }
  }

  void
  EndPathExecutor::seedRunRangeSet(RangeSetHandler const& rsh)
  {
    runRangeSetHandler_.reset(rsh.clone());
  }

  void
  EndPathExecutor::setRunAuxiliaryRangeSetID(RangeSet const& rangeSet)
  {
    for (auto ow : outputWorkers_) {
      ow->setRunAuxiliaryRangeSetID(rangeSet);
    }
  }

  void
  EndPathExecutor::writeRun(RunPrincipal& rp)
  {
    for (auto ow : outputWorkers_) {
      ow->writeRun(rp);
    }
    if (fileStatus_.load() == OutputFileStatus::Switching) {
      runRangeSetHandler_->rebase();
    }
  }

  void
  EndPathExecutor::seedSubRunRangeSet(RangeSetHandler const& rsh)
  {
    subRunRangeSetHandler_.reset(rsh.clone());
  }

  void
  EndPathExecutor::setSubRunAuxiliaryRangeSetID(RangeSet const& rs)
  {
    for (auto ow : outputWorkers_) {
      // For RootOutput this enters the possibly split range set into
      // the range set db.
      ow->setSubRunAuxiliaryRangeSetID(rs);
    }
  }

  void
  EndPathExecutor::writeSubRun(SubRunPrincipal& srp)
  {
    for (auto ow : outputWorkers_) {
      ow->writeSubRun(srp);
    }
    if (fileStatus_.load() == OutputFileStatus::Switching) {
      subRunRangeSetHandler_->rebase();
    }
  }

  //
  //  MEMBER FUNCTIONS -- Process Non-Event
  //

  void
  EndPathExecutor::process(Transition trans, Principal& principal)
  {
    for (auto& worker : unique_workers(endPathInfo_)) {
      worker.reset();
    }
    try {
      if (!endPathInfo_.paths().empty()) {
        endPathInfo_.paths().front().process(trans, principal);
      }
    }
    catch (cet::exception& ex) {
      throw Exception(errors::EventProcessorFailure, "EndPathExecutor:")
        << "an exception occurred during current event processing\n"
        << ex;
    }
    catch (...) {
      mf::LogError("PassingThrough")
        << "an exception occurred during current event processing\n";
      throw;
    }
    endPathInfo_.incrementPassedEventCount();
  }

  class EndPathExecutor::PathsDoneTask {
  public:
    PathsDoneTask(EndPathExecutor* const endPathExec,
                  WaitingTaskPtr const finalizeEventTask,
                  GlobalTaskGroup& taskGroup)
      : endPathExec_{endPathExec}
      , finalizeEventTask_{finalizeEventTask}
      , taskGroup_{taskGroup}
    {}

    void
    operator()(exception_ptr const ex)
    {
      auto const scheduleID = endPathExec_->sc_.id();

      // Note: When we start our parent task is the eventLoop task.
      TDEBUG_BEGIN_TASK_SI(4, scheduleID);

      if (ex) {
        try {
          rethrow_exception(ex);
        }
        catch (cet::exception& e) {
          Exception tmp(errors::EventProcessorFailure, "EndPathExecutor:");
          tmp << "an exception occurred during current event processing\n" << e;
          taskGroup_.may_run(finalizeEventTask_, make_exception_ptr(tmp));
          TDEBUG_END_TASK_SI(4, scheduleID)
            << "end path processing terminate because of EXCEPTION";
          return;
        }
        catch (...) {
          taskGroup_.may_run(finalizeEventTask_, current_exception());
          TDEBUG_END_TASK_SI(4, scheduleID)
            << "end path processing terminate because of EXCEPTION";
          return;
        }
      }

      endPathExec_->endPathInfo_.incrementPassedEventCount();

      taskGroup_.may_run(finalizeEventTask_);
      TDEBUG_END_TASK_SI(4, scheduleID);
    }

  private:
    EndPathExecutor* const endPathExec_;
    WaitingTaskPtr const finalizeEventTask_;
    GlobalTaskGroup& taskGroup_;
  };

  // Note: We come here as part of the endPath task, our
  // parent task is the eventLoop task.
  void
  EndPathExecutor::process_event(WaitingTaskPtr finalizeEventTask,
                                 EventPrincipal& ep)
  {
    auto const sid = sc_.id();
    TDEBUG_BEGIN_FUNC_SI(4, sid);
    endPathInfo_.reset_for_event();
    endPathInfo_.incrementTotalEventCount();
    try {
      auto pathsDoneTask =
        make_waiting_task<PathsDoneTask>(this, finalizeEventTask, taskGroup_);
      if (endPathInfo_.paths().empty()) {
        taskGroup_.may_run(pathsDoneTask);
      } else {
        endPathInfo_.paths().front().process(pathsDoneTask, ep);
      }
    }
    catch (...) {
      taskGroup_.may_run(finalizeEventTask, current_exception());
    }
    TDEBUG_END_FUNC_SI(4, sid);
  }

  void
  EndPathExecutor::writeEvent(EventPrincipal& ep)
  {
    // We don't worry about providing the sorted list of module names
    // for the end_path right now.  If users decide it is necessary to
    // know what they are, then we can provide them.
    PathContext const pc{sc_, PathContext::end_path_spec(), {}};
    for (auto ow : outputWorkers_) {
      ow->writeEvent(ep, pc);
    }
    auto const& eid = ep.eventID();
    bool const lastInSubRun{ep.isLastInSubRun()};
    TDEBUG_FUNC_SI(5, sc_.id())
      << "eid: " << eid.run() << ", " << eid.subRun() << ", " << eid.event();
    runRangeSetHandler_->update(eid, lastInSubRun);
    subRunRangeSetHandler_->update(eid, lastInSubRun);
  }

  bool
  EndPathExecutor::outputsToClose() const
  {
    return !outputWorkersToClose_.empty();
  }

  // MT note: This is where we need to get all the schedules
  //          synchronized, and then have all schedules do the file
  //          close, and then the file open, then the schedules can
  //          proceed.  A nasty complication is that a great deal of
  //          time can go by between the file close and the file open
  //          because artdaq may pause the run inbetween, and wants to
  //          have all output files closed while the run is paused.
  //          They probably want the input file closed too.
  void
  EndPathExecutor::closeSomeOutputFiles()
  {
    setOutputFileStatus(OutputFileStatus::Switching);
    for (auto ow : outputWorkersToClose_) {
      // Skip files that are already closed due to other end-path
      // executors already closing them.
      if (!ow->fileIsOpen()) {
        continue;
      }
      ow->closeFile();
    }
    outputWorkersToOpen_ = std::move(outputWorkersToClose_);
  }

  bool
  EndPathExecutor::outputsToOpen() const
  {
    return !outputWorkersToOpen_.empty();
  }

  void
  EndPathExecutor::openSomeOutputFiles(FileBlock const& fb)
  {
    for (auto ow : outputWorkersToOpen_) {
      ow->openFile(fb);
    }
    setOutputFileStatus(OutputFileStatus::Open);
    outputWorkersToOpen_.clear();
  }

  // Note: When we are passed OutputFileStatus::Switching, we must close
  //       the file and call openSomeOutputFiles which changes it back
  //       to OutputFileStatus::Open.
  //       A side effect of switching status is the run/subrun writes
  //       are not counted in the overall counting by RootOutputClosingCriteria
  //       while the switch is active (this avoids counting the extra subRun and
  //       Run that we are forced to write to finish out the file we are
  //       closing, which keeps the ongoing count for closing based on SubRun
  //       and Run counts meaningful).  However, the extra ones are still
  //       counted by the tree entry counters.
  void
  EndPathExecutor::setOutputFileStatus(OutputFileStatus const ofs)
  {
    for (auto ow : outputWorkers_) {
      ow->setFileStatus(ofs);
    }
    fileStatus_ = ofs;
  }

  void
  EndPathExecutor::recordOutputClosureRequests(Granularity const atBoundary)
  {
    for (auto ow : outputWorkers_) {
      if (atBoundary < ow->fileGranularity()) {
        // The boundary we are checking at is finer than the checks
        // the output worker needs, nothing to do.
        continue;
      }
      if (ow->requestsToCloseFile()) {
        outputWorkersToClose_.insert(ow);
      }
    }
  }

  void
  EndPathExecutor::incrementInputFileNumber()
  {
    for (auto ow : outputWorkers_) {
      ow->incrementInputFileNumber();
    }
  }

} // namespace art