forked from byterazor/EventManager
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
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#pragma once
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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* Copyright 2021 Dominik Meyer <dmeyer@federationhq.de>
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* This file is part of the EventManager distribution hosted at https://gitea.federationhq.de/byterazor/EventManager.git
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*/
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/** @file */
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#include <cstdint>
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#include <atomic>
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#include <stdexcept>
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#include <memory>
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namespace EventManager
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{
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// forward declaration of a participant
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class Participant;
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/// Eventtype to notify all participants that a shutdown is immanent
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const static std::uint32_t EVENT_TYPE_SHUTDOWN = 0;
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class Event
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{
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private:
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/// the type of the event
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std::uint32_t type_;
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/// the id which uniquly identifies the event
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std::uint64_t id_;
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/// a possible response id, identifying if this event is in repsonse to another event
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std::uint64_t responseId_;
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/// identifies if this event is a response to another event
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std::atomic<bool> isResponse_;
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/// emitter of the event
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std::shared_ptr<EventManager::Participant> emitter_;
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public:
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/**
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* @brief constructor for creating a simple event
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*
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* @param type - what kinf of event is this
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*/
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Event(std::uint32_t type);
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/**
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* @brief Constructor to create a response Event
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*/
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Event(std::uint32_t type, const EventManager::Event &event);
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/**
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* @brief Constructor to create a response Event
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*/
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Event(std::uint32_t type, const std::shared_ptr<EventManager::Event> event);
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/**
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* @brief return the id of the event
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*/
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std::uint64_t id() const { return id_;}
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/**
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* @brief return the response id if this event is a response
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*/
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std::uint64_t responseId() const {
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if (!isResponse_)
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{
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throw std::runtime_error("is not a response event");
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}
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return responseId_;
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}
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/**
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* @brief check if the event is a response
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*/
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bool isResponse() const { return isResponse_;}
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/**
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* @brief return the type of the event
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*/
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std::uint32_t type() const { return type_;}
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/**
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* @brief set the emitter of the event
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*/
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void emitter(std::shared_ptr<EventManager::Participant> participant) { emitter_=participant;}
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/**
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* @brief return the emitter of the event
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*/
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std::shared_ptr<EventManager::Participant> emitter() const {return emitter_;}
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}; //
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}; // namespace EventManager
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