include/GaudiKernel/IIncidentSvc.h

0001 /***********************************************************************************\
0002 * (c) Copyright 1998-2021 CERN for the benefit of the LHCb and ATLAS collaborations *
0003 *                                                                                   *
0004 * This software is distributed under the terms of the Apache version 2 licence,     *
0005 * copied verbatim in the file "LICENSE".                                            *
0006 *                                                                                   *
0007 * In applying this licence, CERN does not waive the privileges and immunities       *
0008 * granted to it by virtue of its status as an Intergovernmental Organization        *
0009 * or submit itself to any jurisdiction.                                             *
0010 \***********************************************************************************/
0011 #ifndef INTERFACES_IINCIDENTSVC_H
0012 #define INTERFACES_IINCIDENTSVC_H
0013
0014 // Include Files
0015 #include "GaudiKernel/EventContextHash.h"
0016 #include "GaudiKernel/IInterface.h"
0017 #include "GaudiKernel/Incident.h"
0018 #include <memory>
0019 #include <string>
0020 #include <vector>
0021 // Forward declarations
0022 class IIncidentListener;
0023 // class Incident;
0024
0025 /** @class IIncidentSvc IIncidentSvc.h GaudiKernel/IIncidentSvc.h
0026
0027     The interface implemented by the IncidentSvc service. It is used by
0028     Listeners to declare themselves that they are interested by Incidents
0029     of a certain type and by Incident originators.
0030
0031     @author Pere Mato
0032 */
0033 class GAUDI_API IIncidentSvc : virtual public IInterface {
0034 public:
0035   /// InterfaceID
0036   DeclareInterfaceID( IIncidentSvc, 2, 0 );
0037
0038   /** Add listener
0039       @param lis Listener address
0040       @param type Incident type
0041       @param priority  Priority in handling incident
0042   */
0043   virtual void addListener( IIncidentListener* lis, const std::string& type = "", long priority = 0,
0044                             bool rethrow = false, bool singleShot = false ) = 0;
0045   /** Remove listener
0046       @param lis Listener address
0047       @param type Incident type
0048   */
0049   virtual void removeListener( IIncidentListener* lis, const std::string& type = "" ) = 0;
0050
0051   //@TODO: return vector by value instead...
0052   virtual void getListeners( std::vector<IIncidentListener*>& lis, const std::string& type = "" ) const = 0;
0053
0054   /** Fire an Incident
0055       @param Incident being fired
0056   */
0057   virtual void fireIncident( const Incident& incident ) = 0;
0058
0059   /** Listener properties */
0060   struct Listener final {
0061     IIncidentListener* iListener{ nullptr };
0062     long               priority{ 0 };
0063     bool               rethrow{ false };
0064     bool               singleShot{ false };
0065   };
0066
0067   /** List of incidents and their listeners */
0068   typedef std::vector<std::pair<std::unique_ptr<Incident>, std::vector<Listener>>> IncidentPack;
0069
0070   /** Get List of asynchronous incidents and their listeners */
0071   virtual IIncidentSvc::IncidentPack getIncidents( const EventContext* ctx ) = 0;
0072
0073   /** Fire an Incident, Incident ownership has to be passed to the
0074       service since it is going to be accessed asynchronously
0075       @param Incident being fired
0076   */
0077   virtual void fireIncident( std::unique_ptr<Incident> incident ) = 0;
0078 };
0079
0080 #endif // GAUDIKERNEL_IINCIDENTSVC_H