OutputStreamSequencerSvc.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/

 
#include "OutputStreamSequencerSvc.h"
#include "MetaDataSvc.h"
 
#include "GaudiKernel/IIncidentSvc.h"
#include "GaudiKernel/FileIncident.h"
#include "GaudiKernel/ConcurrencyFlags.h"
 
#include <charconv>
#include <format>
#include <print>
#include <string_view>
#include <sstream>
 
 
//________________________________________________________________________________
OutputStreamSequencerSvc::OutputStreamSequencerSvc(const std::string& name, ISvcLocator* pSvcLocator)
  : base_class(name, pSvcLocator),
    m_metaDataSvc("MetaDataSvc", name),
    m_fileSequenceNumber(-1)
{
}
 
//__________________________________________________________________________
OutputStreamSequencerSvc::~OutputStreamSequencerSvc() {
}
//__________________________________________________________________________
StatusCode OutputStreamSequencerSvc::initialize() {
   ATH_MSG_DEBUG("Initializing {}", name());
 
   // Set to be listener for end of event
   ServiceHandle<IIncidentSvc> incsvc("IncidentSvc", this->name());
   if (!incsvc.retrieve().isSuccess()) {
      ATH_MSG_FATAL("Cannot get IncidentSvc.");
      return(StatusCode::FAILURE);
   }
   if( !incidentName().empty() ) {
      incsvc->addListener(this, incidentName(), 100);
      incsvc->addListener(this, IncidentType::BeginProcessing, 100);
      ATH_MSG_DEBUG("Listening to {} incidents", incidentName() );
      ATH_MSG_DEBUG("Reporting is {}", (m_reportingOn.value()? "ON" : "OFF") );
      // Retrieve MetaDataSvc
      if( !m_metaDataSvc.isValid() and !m_metaDataSvc.retrieve().isSuccess() ) {
         ATH_MSG_ERROR("Cannot get MetaDataSvc");
         return StatusCode::FAILURE;
      }
   }
 
   if( inConcurrentEventsMode() ) {
      ATH_MSG_DEBUG("Concurrent events mode");
   } else {
      ATH_MSG_VERBOSE("Sequential events mode");
   }
 
   m_finishedRange = m_fnToRangeId.end();
 
   return(StatusCode::SUCCESS);
}
//__________________________________________________________________________
StatusCode OutputStreamSequencerSvc::finalize() {
   // Release MetaDataSvc
   if (!m_metaDataSvc.release().isSuccess()) {
      ATH_MSG_WARNING("Cannot release MetaDataSvc.");
   }
   return(StatusCode::SUCCESS);
}
 
//__________________________________________________________________________
bool    OutputStreamSequencerSvc::inConcurrentEventsMode() {
   return Gaudi::Concurrency::ConcurrencyFlags::numConcurrentEvents() > 1;
}
 
//__________________________________________________________________________
bool    OutputStreamSequencerSvc::inUse() const {
   std::lock_guard lockg( m_mutex );
   return m_fileSequenceNumber >= 0;
}
 
//__________________________________________________________________________
void OutputStreamSequencerSvc::handle(const Incident& inc)
{
   const EventContext& ctx = inc.context();
   m_lastIncident = inc.type();
   ATH_MSG_INFO("Handling incident of type " << m_lastIncident << " for " << ctx);
 
   if( inc.type() == incidentName() ) {  // NextEventRange
      std::string rangeID;
      const FileIncident* fileInc  = dynamic_cast<const FileIncident*>(&inc);
      if (fileInc != nullptr) {
        rangeID = fileInc->fileName();
        // Handle BeginInputFile
        if (inc.type() == IncidentType::BeginInputFile) {
          rangeID = "INFILE";
        }
        ATH_MSG_DEBUG(
                      "Requested (through incident) Next Event Range filename extension: {}",
                      rangeID);
      }
 
      if( rangeID == "dummy" ) {
         if( not inConcurrentEventsMode() ) {
            // finish the previous Range here only in SEQUENTIAL (threads<2) event processing
            // Write metadata on the incident finishing a Range (filename=="dummy") in ES MP
            ATH_MSG_DEBUG("MetaData transition");
            // immediate write and disconnect for ES, otherwise do it after Event write is done
            bool disconnect { true };
            std::lock_guard lockg( m_mutex );
            if( !m_metaDataSvc->transitionMetaDataFile( m_lastFileName, disconnect ).isSuccess() ) {
               throw GaudiException("Cannot transition MetaData", name(), StatusCode::FAILURE);
            }
         }
         // exit now, wait for the next (real) incident that will start the next range
         return;
      }
      {
         // start a new range
         std::lock_guard lockg( m_mutex );
         m_fileSequenceNumber++;
         if( rangeID.empty() ) {
            std::ostringstream n;
            std::print (n, "_{:04}", m_fileSequenceNumber);
            rangeID = n.str();
            ATH_MSG_DEBUG("Default next event range filename extension: {}", rangeID);
         }
         else if (rangeID == "INFILE") {
             rangeID = std::to_string(m_fileSequenceNumber);
         }
         // from now on new events will use the new rangeID
         m_currentRangeID = rangeID;
         // for ESMT these incidents are asynchronous, so wait for BeginProcessing to update the range map
         if( not inConcurrentEventsMode() or ctx.valid() ) {
           *m_rangeIDinSlot.get(ctx) = std::move(rangeID);
         }
      }
      if( not inConcurrentEventsMode() and not fileInc ) {
         // non-file incident case (filename=="") in regular SP LoopMgr
         ATH_MSG_DEBUG("MetaData transition");
         bool disconnect { false };
         // MN: may not know the full filename yet, but that is only needed for disconnect==true
         if( !m_metaDataSvc->transitionMetaDataFile( "" /*m_lastFileName*/, disconnect ).isSuccess() ) {
            throw GaudiException("Cannot transition MetaData", name(), StatusCode::FAILURE);
         }
      }
   }
   else if( inc.type() == IncidentType::BeginProcessing ) {
      // new event start - assing current rangeId to its slot
      std::lock_guard lockg( m_mutex );
      ATH_MSG_DEBUG("Assigning rangeID = {} to slot {}",
                    m_currentRangeID, ctx.slot());
      *m_rangeIDinSlot.get(ctx) = m_currentRangeID;
   }
}
 
//__________________________________________________________________________
std::string OutputStreamSequencerSvc::buildSequenceFileName(const EventContext& ctx, const std::string& orgFileName)
{
   if( !inUse() ) {
      // Event sequences not in use, just return the original filename
      return orgFileName;
   }
   std::string rangeID = currentRangeID(ctx);
   std::lock_guard lockg( m_mutex );
   if (!m_replaceRangeMode) {
     // build the full output file name for this event range
     std::string fileNameCore = orgFileName, fileNameExt;
     std::size_t sepPos = orgFileName.find('[');
     if (sepPos != std::string::npos) {
       fileNameCore = orgFileName.substr(0, sepPos);
       fileNameExt = orgFileName.substr(sepPos);
     }
     m_lastFileName = fileNameCore + "." + rangeID + fileNameExt;
   } else {
     std::string_view origFileNameView = orgFileName;
     std::size_t open = origFileNameView.find('[');
     std::size_t close = origFileNameView.find(']');
     // If we don't find a [  ] enclosed section, just append the rangeID to the
     // end
     if (open == std::string_view::npos || close == std::string_view::npos) {
       m_lastFileName = std::format("{}.{}", origFileNameView, rangeID);
     } else {
       // build list of elems to substitute from
       ATH_MSG_DEBUG("Building element list");
       std::vector<std::string_view> elems{};
       std::size_t pos = open + 1;
       for (std::size_t comma = origFileNameView.find(',', pos);
            comma < close;
            comma = origFileNameView.find(',', pos)) {
     std::string_view item = origFileNameView.substr(pos, comma - pos);
     ATH_MSG_DEBUG("(start) pos = {}, (end) comma = comma, item = {}",
                       pos, comma, item);
         elems.push_back(item);
         pos = comma + 1;
       }
       std::string_view last_item = origFileNameView.substr(pos, close - pos);
       ATH_MSG_DEBUG("(start) pos = {}, (end) close = {}, item = {}",
                     pos, close, last_item);
       elems.push_back(last_item);
       // substitute
       std::size_t rangeIdx{};
       auto rangeIdxParseRes = std::from_chars(
           rangeID.data(), rangeID.data() + rangeID.size(), rangeIdx);
       if (rangeIdxParseRes.ec != std::errc()) {
         ATH_MSG_ERROR(
             "Error parsing rangeID to integer. Replacing [] list with "
             "rangeID.");
         m_lastFileName =
             std::format("{}{}{}", origFileNameView.substr(0, open), rangeID,
                         origFileNameView.substr(close + 1));
       } else if (rangeIdx >= elems.size()) {
         ATH_MSG_WARNING(
             "Number of elements in [] list <= rangeID. Replacing [] list with "
             "rangeID.");
         m_lastFileName =
             std::format("{}{}{}", origFileNameView.substr(0, open), rangeID,
                         origFileNameView.substr(close + 1));
       } else {
         m_lastFileName = std::format(
             "{}{}{}", origFileNameView.substr(0, open), elems.at(rangeIdx),
             origFileNameView.substr(close + 1));
         ATH_MSG_DEBUG("Output file: {}", m_lastFileName);
       }
     }
   }
 
   if( m_reportingOn.value() ) {
      m_fnToRangeId.insert( std::pair(m_lastFileName, rangeID) );
   }
 
   return m_lastFileName;
}
 
 
std::string OutputStreamSequencerSvc::currentRangeID(const EventContext& ctx) const
{
   if( !inUse() )  return "";
   return *m_rangeIDinSlot.get(ctx);
}
 
 
std::string OutputStreamSequencerSvc::setRangeID(const EventContext& ctx, const std::string & rangeID)
{
   std::string* rangeid = m_rangeIDinSlot.get(ctx);
   const std::string oldrange = *rangeid;
   *rangeid = rangeID;
   return oldrange;
}
 
 
void OutputStreamSequencerSvc::publishRangeReport(const std::string& outputFile)
{
   std::lock_guard lockg( m_mutex );
   m_finishedRange = m_fnToRangeId.find(outputFile);
}
 
OutputStreamSequencerSvc::RangeReport_ptr OutputStreamSequencerSvc::getRangeReport()
{
  RangeReport_ptr report;
  if( !m_reportingOn.value() ) {
     ATH_MSG_WARNING("Reporting not turned on - set {} to True",
                     m_reportingOn.name());
  } else {
     std::lock_guard lockg( m_mutex );
     if(m_finishedRange!=m_fnToRangeId.end()) {
        report = std::make_unique<RangeReport_t>(m_finishedRange->second,m_finishedRange->first);
        m_fnToRangeId.erase(m_finishedRange);
        m_finishedRange=m_fnToRangeId.end();
     }
  }
  return report;
}