ExceptionSvc.cpp

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// ============================================================================
// Include files
// ============================================================================
// STD & STL
// ============================================================================
#include <cassert>
#include <algorithm>
// ============================================================================
// GaudiKernel
// ============================================================================
#include "GaudiKernel/ISvcLocator.h"
// ============================================================================
//Local
// ============================================================================
#include "ExceptionSvc.h"
// ============================================================================

#include <boost/regex.hpp>

using namespace std;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

DECLARE_COMPONENT(ExceptionSvc)

inline void toupper(std::string &s)
{
  std::transform(s.begin(), s.end(), s.begin(),
                 (int(*)(int)) toupper);
}

//
//

ExceptionSvc::ExceptionSvc( const std::string& nam, ISvcLocator* svc )
  : base_class( nam, svc )
  , m_log(msgSvc(), name() )
{
  // for exceptions
  declareProperty( "Catch"      , m_mode_exc_s="ALL" ) ;

  // for return codes
  declareProperty( "Errors"     , m_mode_err_s="NONE" ) ;
}

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

StatusCode
ExceptionSvc::initialize() {
  StatusCode status = Service::initialize();
  m_log.setLevel( m_outputLevel.value() );

  if ( status.isFailure() )  { return status ; }                  // RETURN

  string key = m_mode_exc_s.value();

  auto loc = key.find(" ");
  std::string mode = key.substr(0,loc);

  toupper(mode);

  if (mode == "NONE") {       m_mode_exc = NONE;
  } else if (mode == "ALL") { m_mode_exc = ALL;
  } else {
    m_log << MSG::ERROR << "Unknown mode for Exception handling: \"" << mode
    << "\". Default must be one of \"ALL\" or \"NONE\"" << endmsg;
    m_state = Gaudi::StateMachine::OFFLINE;
    return StatusCode::FAILURE;
  }

  if (loc == string::npos) {
    key.clear();
  } else {
    key = key.substr(loc+1);
  }

  std::string VAL, TAG;

  static const boost::regex exp{"[[:space:]]*([^[:space:]]+)[[:space:]]*=[[:space:]]*([^[:space:]]+)"};
  static const auto tok_end = boost::sregex_iterator();
  for (auto tok_iter = boost::sregex_iterator(begin(key), end(key), exp);
       tok_iter != tok_end; ++tok_iter)
  {
    TAG = (*tok_iter)[1];
    VAL = (*tok_iter)[2];
    toupper(VAL);

    if (VAL == "SUCCESS") {              m_retCodesExc[TAG] = SUCCESS;
    } else if ( VAL == "FAILURE" ) {     m_retCodesExc[TAG] = FAILURE;
    } else if ( VAL == "REVOVERABLE" ) { m_retCodesExc[TAG] = RECOVERABLE;
    } else if ( VAL == "RETHROW" ) {     m_retCodesExc[TAG] = RETHROW;
    } else if ( VAL == "DEFAULT" ) {     m_retCodesExc[TAG] = DEFAULT;
    } else {
      m_log << MSG::ERROR << "In JobOpts: unknown return code \"" << VAL
            << "\" for Algorithm " << TAG << std::endl
            << "   Must be one of: DEFAULT, SUCCESS, FAILURE, RECOVERABLE, RETHROW"
            << endmsg;
      m_state = Gaudi::StateMachine::OFFLINE;
      return StatusCode::FAILURE;
    }

    m_log << MSG::DEBUG << "Will catch exceptions thrown by: " << TAG
          << " -> action: " << VAL << endmsg;

  }

  // now process errors
  key = m_mode_err_s.value();

  loc = key.find(" ");
  mode = key.substr(0,loc);

  toupper(mode);

  if (mode == "NONE") {       m_mode_err = NONE;
  } else if (mode == "ALL") { m_mode_err = ALL;
  } else {
    m_log << MSG::ERROR << "Unknown mode for Error handling: \"" << mode
          << "\". Default must be one of \"ALL\" or \"NONE\"" << endmsg;
    m_state = Gaudi::StateMachine::OFFLINE;
    return StatusCode::FAILURE;
  }

  if (loc == string::npos) {
    key.clear();
  } else {
    key = key.substr(loc+1);
  }

  for (auto tok_iter = boost::sregex_iterator(begin(key), end(key), exp);
       tok_iter != tok_end; ++tok_iter)
  {
    TAG = (*tok_iter)[1];
    VAL = (*tok_iter)[2];
    toupper(VAL);

    if (VAL == "SUCCESS") {              m_retCodesErr[TAG] = SUCCESS;
    } else if ( VAL == "FAILURE" ) {     m_retCodesErr[TAG] = FAILURE;
    } else if ( VAL == "RECOVERABLE" ) { m_retCodesErr[TAG] = RECOVERABLE;
    } else {
      m_log << MSG::ERROR << "In JobOpts: unknown return code \"" << VAL
            << "\" for Algorithm " << TAG << std::endl
            << "   Must be one of: SUCCESS, FAILURE, RECOVERABLE"
            << endmsg;
      m_state = Gaudi::StateMachine::OFFLINE;
      return StatusCode::FAILURE;
    }

    m_log << MSG::DEBUG << "Will process Errors returned by: " << TAG
          << " -> action: " << VAL << endmsg;
  }
  return status;
}

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

StatusCode ExceptionSvc::handleErr
( const INamedInterface& alg ,
  const StatusCode&      st  ) const
{
  m_log << MSG::DEBUG << "Handling Error from " << alg.name() << endmsg;

  // is this Alg special?
  auto i = m_retCodesErr.find(alg.name());
  if ( i != m_retCodesErr.end()) {
    switch ( i->second ) {
    case SUCCESS:     return StatusCode::SUCCESS;
    case FAILURE:     return StatusCode::FAILURE;
    case RECOVERABLE: return StatusCode::RECOVERABLE;
      // should never get here
    case RETHROW: break;
    case DEFAULT: break;
    }

  } else {

    if (m_mode_err == ALL) return StatusCode::FAILURE; // turn it into FAILURE
    assert (m_mode_err == NONE );
    // don't touch the return code
    return st;
  }
  return StatusCode::FAILURE;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

StatusCode ExceptionSvc::process
( const INamedInterface& alg ) const
{

  // is this Alg special?
  auto i = m_retCodesExc.find(alg.name());
  if ( i != m_retCodesExc.end()) {

    switch ( i->second ) {
    case DEFAULT:     return StatusCode::FAILURE; // there is no default
    case SUCCESS:     return StatusCode::SUCCESS;
    case FAILURE:     return StatusCode::FAILURE;
    case RECOVERABLE: return StatusCode::RECOVERABLE;
    case RETHROW:     throw;
    }
  } 

  if (m_mode_exc == ALL) { throw; }
  assert (m_mode_exc == NONE);
  return StatusCode::FAILURE;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

StatusCode ExceptionSvc::handle
( const INamedInterface& alg ) const
{
  m_log << MSG::DEBUG << "Handling unknown exception for " << alg.name()
        << endmsg;
  return process(alg);
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

StatusCode ExceptionSvc::handle
( const INamedInterface& alg ,
  const std::exception & exc ) const
{
  m_log << MSG::DEBUG << "Handling std:except: \"" << exc.what() << "\" for "
        << alg.name() << endmsg;
  return process(alg) ;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

StatusCode ExceptionSvc::handle
( const INamedInterface& alg ,
  const GaudiException & exc ) const
{
  m_log << MSG::DEBUG << "Handling GaudiException: \"" << exc << "\" for "
        << alg.name() << endmsg;
  return process(alg);
}

// ============================================================================
// The END
// ============================================================================