TrigEventSelectorByteStream.cxx

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
// Trigger includes
#include "TrigEventSelectorByteStream.h"
#include "TrigKernel/HltExceptions.h"
 
// Athena includes
#include "AthenaKernel/EventContextClid.h"
#include "ByteStreamCnvSvcBase/IByteStreamInputSvc.h"
#include "ByteStreamCnvSvcBase/ByteStreamAddress.h"
#include "ByteStreamData/RawEvent.h"
#include "CxxUtils/checker_macros.h"
#include "StoreGate/StoreGateSvc.h"
#include "xAODEventInfo/EventInfo.h"
#include "xAODEventInfo/EventAuxInfo.h"
 
// =============================================================================
// Standard constructor
// =============================================================================
TrigEventSelectorByteStream::TrigEventSelectorByteStream(const std::string& name, ISvcLocator* svcLoc)
: base_class(name, svcLoc),
  m_eventSource("ByteStreamInputSvc", name),
  m_evtStore("StoreGateSvc", name) {
  declareProperty("ByteStreamInputSvc", m_eventSource);
}
 
// =============================================================================
// Standard destructor
// =============================================================================
TrigEventSelectorByteStream::~TrigEventSelectorByteStream() {}
 
// =============================================================================
// Implementation of Service::initialize
// =============================================================================
StatusCode TrigEventSelectorByteStream::initialize()
{
  ATH_MSG_VERBOSE("start of " << __FUNCTION__);
 
  ATH_CHECK(m_eventSource.retrieve());
  ATH_CHECK(m_evtStore.retrieve());
 
  ATH_MSG_VERBOSE("end of " << __FUNCTION__);
  return StatusCode::SUCCESS;
}
 
// =============================================================================
// Implementation of Service::finalize
// =============================================================================
StatusCode TrigEventSelectorByteStream::finalize()
{
  ATH_MSG_VERBOSE("start of " << __FUNCTION__);
  if (m_eventSource.release().isFailure()) {
    ATH_MSG_WARNING("Cannot release the event source service");
  }
  ATH_MSG_VERBOSE("end of " << __FUNCTION__);
  return StatusCode::SUCCESS;
}
 
// =============================================================================
// Implementation of IEvtSelector::next(Context&)
// There is actually no event selection here, we process all events online
// =============================================================================
StatusCode TrigEventSelectorByteStream::next(IEvtSelector::Context& /*c*/) const
{
  ATH_MSG_VERBOSE("start of " << __FUNCTION__);
 
  // RawEvent is a typedef for FullEventFragment
  const RawEvent* ptrRawEvent = nullptr;
 
  // Try to get the next event from the event source
  try {
    ptrRawEvent = m_eventSource->nextEvent();
  }
  catch (const hltonl::Exception::NoMoreEvents& e) {
    ATH_MSG_INFO(e.what());
    throw; // rethrow NoMoreEvents
  }
  catch (const hltonl::Exception::NoEventsTemporarily& e) {
    ATH_MSG_DEBUG(e.what());
    throw; // rethrow NoEventsTemporarily
  }
  catch (const hltonl::Exception::EventSourceCorrupted& e) {
    ATH_MSG_ERROR(e.what());
    throw; // rethrow EventSourceCorrupted
  }
  catch (const hltonl::Exception::MissingCTPFragment& e) {
    ATH_MSG_INFO(e.what());
    throw; // rethrow MissingCTPFragment
  }
  catch (const hltonl::Exception::BadCTPFragment& e) {
    ATH_MSG_INFO(e.what());
    throw; // rethrow BadCTPFragment
  }
  catch (const std::exception& e) {
    ATH_MSG_ERROR("Failed to get next event from the event source, std::exception caught: " << e.what());
    return StatusCode::FAILURE;
  }
  catch (...) {
    ATH_MSG_ERROR("Failed to get next event from the event source, unknown exception caught");
    return StatusCode::FAILURE;
  }
 
  // Check if something was returned
  if (ptrRawEvent == nullptr) {
    ATH_MSG_ERROR("Failed to get next event from the event source, nullptr returned");
    return StatusCode::FAILURE;
  }
 
  ATH_MSG_VERBOSE("end of " << __FUNCTION__);
  return StatusCode::SUCCESS;
}
 
// =============================================================================
// Implementation of IEvtSelector::createContext(Context*&)
// =============================================================================
StatusCode TrigEventSelectorByteStream::createContext(IEvtSelector::Context*& c) const
{
  c = new TrigEventSelectorByteStream::Context(this);
  return StatusCode::SUCCESS;
}
 
// =============================================================================
// Implementation of IEvtSelector::releaseContext(Context*&)
// =============================================================================
StatusCode TrigEventSelectorByteStream::releaseContext(IEvtSelector::Context*& /*c*/) const
{
  // this does nothing
  return StatusCode::SUCCESS;
}
 
// =============================================================================
// Implementation of IEvtSelector::createAddress(Context&,IOpaqueAddress*&)
// =============================================================================
StatusCode TrigEventSelectorByteStream::createAddress(const IEvtSelector::Context& /*c*/, IOpaqueAddress*& iop) const
{
  ATH_MSG_VERBOSE("start of " << __FUNCTION__);
 
  // Get the EventContext via event store because the interface doesn't allow passing it explicitly as an argument
  // and we don't want to use ThreadLocalContext. Don't use ReadHandle here because it calls ThreadLocalContext if
  // not given a context (which we want to retrieve).
  const EventContext* eventContext = nullptr;
  ATH_CHECK(m_evtStore->retrieve(eventContext));
 
  // Create and record ByteStreamAddress for xAOD::EventInfo
  ByteStreamAddress* addr = new ByteStreamAddress(ClassID_traits<xAOD::EventInfo>::ID(), "EventInfo", "");
  addr->setEventContext(*eventContext);
  iop = static_cast<IOpaqueAddress*>(addr);
  ATH_CHECK(m_evtStore->recordAddress("EventInfo",iop));
  ATH_MSG_DEBUG("Recorded new ByteStreamAddress for xAOD::EventInfo with event context " << *eventContext);
 
  // Create and record ByteStreamAddress for xAOD::EventAuxInfo
  ByteStreamAddress* auxaddr = new ByteStreamAddress(ClassID_traits<xAOD::EventAuxInfo>::ID(), "EventInfoAux.", "");
  auxaddr->setEventContext(*eventContext);
  ATH_CHECK(m_evtStore->recordAddress("EventInfoAux.", static_cast<IOpaqueAddress*>(auxaddr)));
  ATH_MSG_DEBUG("Recorded new ByteStreamAddress for xAOD::EventAuxInfo with event context " << *eventContext);
 
  ATH_MSG_VERBOSE("end of " << __FUNCTION__);
  return StatusCode::SUCCESS;
}
 
// =============================================================================
// Unimplemented methods of IEvtSelector
// =============================================================================
#define TRIGEVENTSELECTORBYTESTREAM_UNIMPL \
  ATH_MSG_FATAL("Misconfiguration - the method " << __FUNCTION__ << " cannot be used online"); \
  return StatusCode::FAILURE;
 
StatusCode TrigEventSelectorByteStream::next(IEvtSelector::Context& /*c*/, int /*jump*/) const
{
  TRIGEVENTSELECTORBYTESTREAM_UNIMPL
}
 
StatusCode TrigEventSelectorByteStream::previous(IEvtSelector::Context& /*c*/) const
{
  TRIGEVENTSELECTORBYTESTREAM_UNIMPL
}
 
StatusCode TrigEventSelectorByteStream::previous(IEvtSelector::Context& /*c*/, int /*jump*/) const
{
  TRIGEVENTSELECTORBYTESTREAM_UNIMPL
}
 
StatusCode TrigEventSelectorByteStream::last(IEvtSelector::Context& /*refContext*/) const
{
  TRIGEVENTSELECTORBYTESTREAM_UNIMPL
}
 
StatusCode TrigEventSelectorByteStream::rewind(IEvtSelector::Context& /*c*/) const
{
  TRIGEVENTSELECTORBYTESTREAM_UNIMPL
}
 
StatusCode TrigEventSelectorByteStream::resetCriteria(const std::string& /*cr*/, IEvtSelector::Context& /*c*/) const
{
  TRIGEVENTSELECTORBYTESTREAM_UNIMPL
}
 
// =============================================================================
// Context implementation
// =============================================================================
TrigEventSelectorByteStream::Context::Context(const IEvtSelector* selector)
: m_evtSelector(selector) {}
 
TrigEventSelectorByteStream::Context::Context(const TrigEventSelectorByteStream::Context& other)
: m_evtSelector(other.m_evtSelector) {}
 
TrigEventSelectorByteStream::Context::~Context() {}
 
void* TrigEventSelectorByteStream::Context::identifier() const
{
  IEvtSelector* id ATLAS_THREAD_SAFE = const_cast<IEvtSelector*>(m_evtSelector);
  return id;
}