IQueueingEventProcessor.h

Go to the documentation of this file.

/***********************************************************************************\
* (c) Copyright 1998-2019 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.                                             *
\***********************************************************************************/
#pragma once
 
#include <GaudiKernel/EventContext.h>
#include <GaudiKernel/IEventProcessor.h>
#include <GaudiKernel/StatusCode.h>
#include <optional>
#include <tuple>
 
namespace Gaudi::Interfaces {
  struct IQueueingEventProcessor : virtual IEventProcessor {
    DeclareInterfaceID( IQueueingEventProcessor, 1, 0 );

    using ResultType = std::tuple<StatusCode, EventContext>;

    virtual void push( EventContext&& ctx ) = 0;

    virtual bool empty() const = 0;

    virtual std::optional<ResultType> pop() = 0;
  };
} // namespace Gaudi::Interfaces