Service.cpp

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/***********************************************************************************\
* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
*                                                                                   *
* In applying this licence, CERN does not waive the privileges and immunities       *
* granted to it by virtue of its status as an Intergovernmental Organization        *
* or submit itself to any jurisdiction.                                             *
\***********************************************************************************/
#include <GaudiKernel/GaudiException.h>
#include <GaudiKernel/Guards.h>
#include <GaudiKernel/IAuditorSvc.h>
#include <GaudiKernel/IDataHandleHolder.h>
#include <GaudiKernel/IMessageSvc.h>
#include <GaudiKernel/ISvcLocator.h>
#include <GaudiKernel/ISvcManager.h>
#include <GaudiKernel/MsgStream.h>
#include <GaudiKernel/PropertyHolder.h>
#include <GaudiKernel/Service.h>
#include <GaudiKernel/ServiceLocatorHelper.h>
 
using std::string;
 
#define ON_DEBUG if ( msgLevel( MSG::DEBUG ) )
#define ON_VERBOSE if ( msgLevel( MSG::VERBOSE ) )
 
Service::~Service() {
  if ( m_svcManager ) m_svcManager->removeService( this ).ignore();
}
 
// IService::sysInitialize
StatusCode Service::sysInitialize() {
  std::call_once( m_initFlag, &Service::sysInitialize_imp, this );
  return m_initSC;
}
 
void Service::sysInitialize_imp() {
 
  try {
    m_targetState = Gaudi::StateMachine::INITIALIZED;
    Gaudi::Guards::AuditorGuard guard( name(),
                                       // check if we want to audit the initialize
                                       ( m_auditorInitialize ) ? auditorSvc().get() : nullptr,
                                       Gaudi::IAuditor::Initialize );
 
    // initialize messaging (except for MessageSvc)
    if ( name() != "MessageSvc" ) {
      // this initializes the messaging, in case property update handlers need to print
      // and update the property value bypassing the update handler
      m_outputLevel.value() = setUpMessaging();
    }
 
    bindPropertiesTo( serviceLocator()->getOptsSvc() );
 
    if ( m_checkToolDeps && !m_autoRetrieveTools ) {
      error() << "Property AutoRetrieveTools must be set TRUE if CheckToolDeps is True" << endmsg;
      m_initSC = StatusCode::FAILURE;
      return;
    }
 
    m_initSC = initialize(); // This should change the state to Gaudi::StateMachine::CONFIGURED
 
    // Check for data dependencies in AlgTools
    // visit all sub-algs and tools, build full set. First initialize ToolHandles if needed
    if ( m_autoRetrieveTools ) {
      try {
        if ( !m_toolHandlesInit ) initToolHandles();
      } catch ( const GaudiException& Exception ) {
        error() << "Service failed to initilize ToolHandles : " << Exception << endmsg;
        m_initSC = StatusCode::FAILURE;
        return;
      }
 
      if ( m_checkToolDeps ) {
        for ( auto& itool : m_tools ) {
          info() << "  AlgTool: " << itool->name() << endmsg;
          IDataHandleHolder* idh = dynamic_cast<IDataHandleHolder*>( itool );
          if ( idh == 0 ) {
            error() << "dcast to IDataHandleHolder failed" << endmsg;
            continue;
          }
          if ( idh->inputDataObjs().size() != 0 ) {
            error() << "Service " << name() << " holds AlgTool " << itool->name()
                    << " which holds at least one ReadDataHandle" << endmsg;
            for ( auto& obj : idh->inputDataObjs() ) { error() << "   -> InputHandle:  " << obj << endmsg; }
            m_initSC = StatusCode::FAILURE;
          }
          if ( idh->outputDataObjs().size() != 0 ) {
            error() << "Service " << name() << " holds AlgTool " << itool->name()
                    << " which holds at least one WriteDataHandle" << endmsg;
            for ( auto& obj : idh->outputDataObjs() ) { error() << "   -> OutputHandle: " << obj << endmsg; }
            m_initSC = StatusCode::FAILURE;
          }
        }
      }
    }
 
    if ( m_initSC.isSuccess() ) m_state = m_targetState;
    return;
  } catch ( const GaudiException& Exception ) {
    fatal() << "in sysInitialize(): exception with tag=" << Exception.tag() << " is caught" << endmsg;
    error() << Exception << endmsg;
    //    Stat stat( chronoSvc() , Exception.tag() );
  } catch ( const std::exception& Exception ) {
    fatal() << "in sysInitialize(): standard std::exception is caught" << endmsg;
    error() << Exception.what() << endmsg;
    //    Stat stat( chronoSvc() , "*std::exception*" );
  } catch ( ... ) {
    fatal() << "in sysInitialize(): UNKNOWN Exception is caught" << endmsg;
    //    Stat stat( chronoSvc() , "*UNKNOWN Exception*" ) ;
  }
 
  m_initSC = StatusCode::FAILURE;
}
 
//--- IService::initialize
StatusCode Service::initialize() {
  ON_DEBUG debug() << "Service base class initialized successfully" << endmsg;
  m_state = Gaudi::StateMachine::ChangeState( Gaudi::StateMachine::CONFIGURE, m_state );
  return StatusCode::SUCCESS;
}
 
// IService::sysStart
StatusCode Service::sysStart() {
  StatusCode sc;
 
  try {
    m_targetState = Gaudi::StateMachine::ChangeState( Gaudi::StateMachine::START, m_state );
    Gaudi::Guards::AuditorGuard guard( name(),
                                       // check if we want to audit the initialize
                                       ( m_auditorStart ) ? auditorSvc().get() : nullptr, Gaudi::IAuditor::Start );
    sc = start();
    if ( sc.isSuccess() ) m_state = m_targetState;
    return sc;
  } catch ( const GaudiException& Exception ) {
    fatal() << "in sysStart(): exception with tag=" << Exception.tag() << " is caught" << endmsg;
    error() << Exception << endmsg;
    //    Stat stat( chronoSvc() , Exception.tag() );
  } catch ( const std::exception& Exception ) {
    fatal() << "in sysStart(): standard std::exception is caught" << endmsg;
    fatal() << Exception.what() << endmsg;
    //    Stat stat( chronoSvc() , "*std::exception*" );
  } catch ( ... ) {
    fatal() << "in sysStart(): UNKNOWN Exception is caught" << endmsg;
    //    Stat stat( chronoSvc() , "*UNKNOWN Exception*" ) ;
  }
 
  return StatusCode::FAILURE;
}
 
// IService::sysStop
StatusCode Service::sysStop() {
  StatusCode sc;
 
  try {
    m_targetState = Gaudi::StateMachine::ChangeState( Gaudi::StateMachine::STOP, m_state );
    Gaudi::Guards::AuditorGuard guard( name(),
                                       // check if we want to audit the initialize
                                       ( m_auditorStop ) ? auditorSvc().get() : nullptr, Gaudi::IAuditor::Stop );
    sc = stop();
    if ( sc.isSuccess() ) m_state = m_targetState;
    return sc;
  } catch ( const GaudiException& Exception ) {
    fatal() << "in sysStop(): exception with tag=" << Exception.tag() << " is caught" << endmsg;
    error() << Exception << endmsg;
    //    Stat stat( chronoSvc() , Exception.tag() );
  } catch ( const std::exception& Exception ) {
    fatal() << "in sysStop(): standard std::exception is caught" << endmsg;
    error() << Exception.what() << endmsg;
    //    Stat stat( chronoSvc() , "*std::exception*" );
  } catch ( ... ) {
    fatal() << "in sysStop(): UNKNOWN Exception is caught" << endmsg;
    //    Stat stat( chronoSvc() , "*UNKNOWN Exception*" ) ;
  }
 
  return StatusCode::FAILURE;
}
 
//--- IService::stop
StatusCode Service::stop() {
  // stub implementation
  return StatusCode::SUCCESS;
}
 
//--- IService::start
StatusCode Service::start() {
  // stub implementation
  return StatusCode::SUCCESS;
}
 
//--- IService::sysFinalize
StatusCode Service::sysFinalize() {
 
  StatusCode sc( StatusCode::FAILURE );
 
  try {
    m_targetState = Gaudi::StateMachine::OFFLINE;
    Gaudi::Guards::AuditorGuard guard( name(),
                                       // check if we want to audit the initialize
                                       ( m_auditorFinalize ) ? auditorSvc().get() : nullptr,
                                       Gaudi::IAuditor::Finalize );
    sc = finalize();
    if ( sc.isSuccess() ) m_state = m_targetState;
  } catch ( const GaudiException& Exception ) {
    fatal() << " Exception with tag=" << Exception.tag() << " is caught " << endmsg;
    error() << Exception << endmsg;
    //    Stat stat( chronoSvc() , Exception.tag() ) ;
  } catch ( const std::exception& Exception ) {
    fatal() << " Standard std::exception is caught " << endmsg;
    error() << Exception.what() << endmsg;
    //    Stat stat( chronoSvc() , "*std::exception*" ) ;
  } catch ( ... ) {
    fatal() << "UNKNOWN Exception is caught " << endmsg;
    //    Stat stat( chronoSvc() , "*UNKNOWN Exception*" ) ;
  }
 
  m_pAuditorSvc = nullptr;
  return sc;
}
 
//--- IService::finalize
StatusCode Service::finalize() {
  // m_state = Gaudi::StateMachine::ChangeState(Gaudi::StateMachine::TERMINATE,m_state);
  return StatusCode::SUCCESS;
}
 
//--- IService::sysReinitialize
StatusCode Service::sysReinitialize() {
 
  StatusCode sc;
 
  // Check that the current status is the correct one.
  if ( Gaudi::StateMachine::INITIALIZED != FSMState() ) {
    error() << "sysReinitialize(): cannot reinitialize service not initialized" << endmsg;
    return StatusCode::FAILURE;
  }
 
  try {
 
    Gaudi::Guards::AuditorGuard guard( name(),
                                       // check if we want to audit the initialize
                                       ( m_auditorReinitialize ) ? auditorSvc().get() : nullptr,
                                       Gaudi::IAuditor::ReInitialize );
    sc = reinitialize();
    return sc;
  } catch ( const GaudiException& Exception ) {
    fatal() << " Exception with tag=" << Exception.tag() << " is caught " << endmsg;
    error() << Exception << endmsg;
    //    Stat stat( chronoSvc() , Exception.tag() ) ;
  } catch ( const std::exception& Exception ) {
    fatal() << " Standard std::exception is caught " << endmsg;
    error() << Exception.what() << endmsg;
    //    Stat stat( chronoSvc() , "*std::exception*" ) ;
  } catch ( ... ) {
    fatal() << "UNKNOWN Exception is caught " << endmsg;
    //    Stat stat( chronoSvc() , "*UNKNOWN Exception*" ) ;
  }
  return StatusCode::FAILURE;
}
 
//--- IService::sysRestart
StatusCode Service::sysRestart() {
 
  StatusCode sc;
 
  // Check that the current status is the correct one.
  if ( Gaudi::StateMachine::RUNNING != FSMState() ) {
    error() << "sysRestart(): cannot restart service in state " << FSMState() << " -- must be RUNNING " << endmsg;
    return StatusCode::FAILURE;
  }
 
  try {
 
    Gaudi::Guards::AuditorGuard guard( name(),
                                       // check if we want to audit the initialize
                                       ( m_auditorRestart ) ? auditorSvc().get() : nullptr, Gaudi::IAuditor::ReStart );
    sc = restart();
    return sc;
  } catch ( const GaudiException& Exception ) {
    fatal() << " Exception with tag=" << Exception.tag() << " is caught " << endmsg;
    error() << Exception << endmsg;
    //    Stat stat( chronoSvc() , Exception.tag() ) ;
  } catch ( const std::exception& Exception ) {
    fatal() << " Standard std::exception is caught " << endmsg;
    error() << Exception.what() << endmsg;
    //    Stat stat( chronoSvc() , "*std::exception*" ) ;
  } catch ( ... ) {
    fatal() << "UNKNOWN Exception is caught " << endmsg;
    //    Stat stat( chronoSvc() , "*UNKNOWN Exception*" ) ;
  }
  return StatusCode::FAILURE;
}
 
//--- IService::reinitialize
StatusCode Service::reinitialize() {
  /* @TODO
   * MCl 2008-10-23: the implementation of reinitialize as finalize+initialize
   *                 is causing too many problems
   *
  // Default implementation is finalize+initialize
  StatusCode sc = finalize();
  if (sc.isFailure()) {
    error() << "reinitialize(): cannot be finalized" << endmsg;
    return sc;
  }
  sc = initialize();
  if (sc.isFailure()) {
    error() << "reinitialize(): cannot be initialized" << endmsg;
    return sc;
  }
  */
  return StatusCode::SUCCESS;
}
 
//--- IService::restart
StatusCode Service::restart() {
  // Default implementation is stop+start
  StatusCode sc = stop();
  if ( sc.isFailure() ) {
    error() << "restart(): cannot be stopped" << endmsg;
    return sc;
  }
  sc = start();
  if ( sc.isFailure() ) {
    error() << "restart(): cannot be started" << endmsg;
    return sc;
  }
  return StatusCode::SUCCESS;
}
 
//--- IService::getServiceName
const std::string& Service::name() const { return m_name; }
 
//--- Retrieve pointer to service locator
SmartIF<ISvcLocator>& Service::serviceLocator() const { return m_svcLocator; }
 
//--- Local methods
// Standard Constructor
Service::Service( std::string name, ISvcLocator* svcloc ) : m_name( std::move( name ) ), m_svcLocator( svcloc ) {
  if ( m_name != "MessageSvc" ) { // the MessageSvc should not notify itself
    m_outputLevel.declareUpdateHandler(
        [this]( Gaudi::Details::PropertyBase& ) { this->updateMsgStreamOutputLevel( this->m_outputLevel ); } );
  }
 
  // Initialize the default value from ApplicationMgr AuditAlgorithms
  Gaudi::Property<bool> audit( "AuditServices", false );
  if ( auto appMgr = serviceLocator()->service<IProperty>( "ApplicationMgr" ) ) {
    appMgr->getProperty( &audit ).ignore();
  }
 
  m_auditorInitialize   = audit;
  m_auditorStart        = audit;
  m_auditorStop         = audit;
  m_auditorFinalize     = audit;
  m_auditorReinitialize = audit;
  m_auditorRestart      = audit;
}
 
SmartIF<IAuditorSvc>& Service::auditorSvc() const {
  if ( !m_pAuditorSvc ) {
    m_pAuditorSvc = serviceLocator()->service( "AuditorSvc" );
    if ( !m_pAuditorSvc ) { throw GaudiException( "Service [AuditorSvc] not found", name(), StatusCode::FAILURE ); }
  }
  return m_pAuditorSvc;
}
 
void Service::setServiceManager( ISvcManager* ism ) { m_svcManager = ism; }
 
void Service::initToolHandles() const {
  auto init_one = [&]( BaseToolHandle* th ) {
    if ( !th->isEnabled() ) {
      if ( msgLevel( MSG::DEBUG ) && !th->typeAndName().empty() )
        debug() << "ToolHandle " << th->typeAndName() << " not used" << endmsg;
      return;
    }
    if ( !th->get() ) {
      auto sc = th->retrieve();
      if ( sc.isFailure() ) {
        throw GaudiException( "Failed to retrieve tool " + th->typeAndName(), this->name(), StatusCode::FAILURE );
      }
    }
    auto* tool = th->get();
    if ( msgLevel( MSG::DEBUG ) )
      debug() << "Adding " << ( th->isPublic() ? "public" : "private" ) << " ToolHandle tool " << tool->name() << " ("
              << tool->type() << ")" << endmsg;
    m_tools.push_back( tool );
  };
 
  for ( auto thArr : m_toolHandleArrays ) {
    if ( msgLevel( MSG::DEBUG ) )
      debug() << "Registering all Tools in ToolHandleArray " << thArr->propertyName() << endmsg;
    // Iterate over its tools:
    for ( auto toolHandle : thArr->getBaseArray() ) {
      // Try to cast it into a BaseToolHandle pointer:
      BaseToolHandle* bth = dynamic_cast<BaseToolHandle*>( toolHandle );
      if ( bth ) {
        init_one( bth );
      } else {
        error() << "Error retrieving Tool " << toolHandle->typeAndName() << " in ToolHandleArray "
                << thArr->propertyName() << ". Not registered" << endmsg;
      }
    }
  }
 
  for ( BaseToolHandle* th : m_toolHandles ) init_one( th );
 
  m_toolHandlesInit = true;
}
 
const std::vector<IAlgTool*>& Service::tools() const {
  if ( !m_toolHandlesInit ) initToolHandles();
 
  return m_tools;
}
 
std::vector<IAlgTool*>& Service::tools() {
  if ( !m_toolHandlesInit ) initToolHandles();
 
  return m_tools;
}